TWI619480B - Pants type disposable diaper and manufacturing method thereof - Google Patents

Pants type disposable diaper and manufacturing method thereof Download PDF

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Publication number
TWI619480B
TWI619480B TW103122156A TW103122156A TWI619480B TW I619480 B TWI619480 B TW I619480B TW 103122156 A TW103122156 A TW 103122156A TW 103122156 A TW103122156 A TW 103122156A TW I619480 B TWI619480 B TW I619480B
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Taiwan
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sheet
elastic
side seal
diaper
seal portion
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TW103122156A
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Chinese (zh)
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TW201511743A (en
Inventor
Yoshimi Yamashita
Manabu Matsui
Takeshi Miyamura
Youichi Suzuki
Shinji Hamamoto
Hiroya Suzuki
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Kao Corp
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Priority claimed from JP2014050683A external-priority patent/JP6284793B2/en
Priority claimed from JP2014050682A external-priority patent/JP6245644B2/en
Application filed by Kao Corp filed Critical Kao Corp
Publication of TW201511743A publication Critical patent/TW201511743A/en
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Publication of TWI619480B publication Critical patent/TWI619480B/en

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Abstract

外裝體(3)係包含積層體而構成，該積層體為包含彈性纖維及非彈性纖維之伸縮片材(30)與不包含彈性纖維之非伸縮片材之積層體。側封部(4)之厚度大於構成其之腹側部(F)及背側部(R)各者之除該側封部(4)以外之部分之厚度。於側封部(4)之外側端面(40)形成有該外側端面(40)平滑之平滑區域(35)，於該平滑區域(35)內存在彈性纖維。 The exterior body (3) is composed of a laminate including a laminate of elastic sheets and inelastic fibers (30) and a non-stretch sheet containing no elastic fibers. The thickness of the side seal portion (4) is larger than the thickness of a portion other than the side seal portion (4) constituting each of the front side portion (F) and the back side portion (R). A smooth region (35) in which the outer end surface (40) is smooth is formed on the outer end surface (40) of the side seal portion (4), and elastic fibers are present in the smooth region (35).

Description

褲型拋棄式尿布及其製造方法 Pants type disposable diaper and manufacturing method thereof

本發明係關於一種包含側封部之褲型拋棄式尿布。 The present invention relates to a pant-type disposable diaper comprising a side seal.

先前，作為褲型拋棄式尿布通常使用如下者，即，包含：吸收性本體；及外裝體，其配置於該吸收性本體之非肌膚對向面側並將該吸收性本體固定；且前身片中之外裝體之左右兩側緣與後身片中之外裝體之左右兩側緣接合而形成有一對側封部、腰部開口部及一對腿部開口部。例如，於專利文獻1中記載有在該構成之褲型拋棄式尿布中，使用如下之伸縮片材作為外裝體，該伸縮片材包含於以非彈性纖維為主體之可伸長之纖維層之一面一體化有線狀之彈性絲的構成。 Conventionally, as a pant-type disposable diaper, generally, an absorbent body is provided, and an exterior body is disposed on a non-skin opposing side of the absorbent body and fixes the absorbent body; and the precursor The left and right side edges of the outer casing of the sheet are joined to the left and right side edges of the outer body of the back body sheet to form a pair of side seal portions, a waist opening portion, and a pair of leg opening portions. For example, Patent Document 1 discloses that in the pants-type disposable diaper having the above configuration, the stretchable sheet is used as an outer casing, and the stretchable sheet is contained in an extensible fiber layer mainly composed of inelastic fibers. The structure of an integrated elastic wire on one side.

又，先前於拋棄式尿布或經期衛生棉等吸收性物品之製造步驟中，重疊之片材彼此之接合通常使用熱軋裝置，一般而言，側封部係使用熱軋裝置而形成。又，作為其他接合方法，亦已知有使用超音波熔接之方法(例如專利文獻2)及使用雷射光之方法(例如專利文獻3)。 Further, in the manufacturing step of the absorbent article such as the disposable diaper or the menstrual napkin, the hot-rolling device is usually used for the joining of the superposed sheets, and generally, the side seal portion is formed by using a hot rolling device. Further, as another bonding method, a method of using ultrasonic welding (for example, Patent Document 2) and a method of using laser light (for example, Patent Document 3) are also known.

褲型拋棄式尿布通常係經過如下之步驟而製造。即，經過下述步驟而製造：製造如圖6及圖13中符號10所示之尿布連續體般的由複數個尿布於一方向(搬送方向)相連而成之尿布連續體，藉由熱軋裝置等接合機構於該尿布連續體中之側封部形成預定部位將相互重疊之外裝體之前身片側與後身片側相互接合之後，藉由切割器等切斷機構將該接合部切斷，藉此分斷成各個尿布。以此方式製造之先前之褲型拋棄式尿布之側封部(藉由上述切斷機構之切斷而產生之上述接合部之 切斷緣部)係於穿著尿布時，以前身片之左右兩側緣與後身片之左右兩側緣呈合掌狀重疊之形狀自尿布外表面突出。 Pants-type disposable diapers are usually manufactured by the following steps. That is, it is manufactured by manufacturing a diaper continuous body in which a plurality of diapers are connected in one direction (transport direction) like a diaper continuous body as indicated by reference numeral 10 in FIGS. 6 and 13 by hot rolling In the diaper continuous body, the side portion forming portion is formed so as to overlap each other, and the front body side and the back body side are joined to each other, and then the joint portion is cut by a cutting mechanism such as a cutter. Thereby, it is divided into individual diapers. The side seal portion of the prior pants-type disposable diaper manufactured in this manner (the joint portion produced by the cutting of the cutting mechanism) When the diaper is worn, the left and right side edges of the front piece and the left and right side edges of the back piece protrude in a palm shape, and protrude from the outer surface of the diaper.

先前技術文獻 Prior technical literature 專利文獻 Patent literature

專利文獻1：日本專利第4841475號公報 Patent Document 1: Japanese Patent No. 4841475

專利文獻2：日本專利特開2006-82556號公報 Patent Document 2: Japanese Patent Laid-Open Publication No. 2006-82556

專利文獻3：日本專利特開2010-188629號公報 Patent Document 3: Japanese Patent Laid-Open Publication No. 2010-188629

本發明係一種褲型拋棄式尿布，其包含：吸收性本體；及外裝體，其配置於該吸收性本體之非肌膚對向面側並將該吸收性本體固定；且腹側部中之該外裝體之兩側緣部與背側部中之該外裝體之兩側緣部接合而形成有一對側封部、腰部開口部及一對腿部開口部。上述外裝體係包含伸縮片材而構成，該伸縮片材包含彈性纖維及非彈性纖維。上述側封部係由上述腹側部中之上述外裝體之兩側緣部與上述背側部中之上述外裝體之兩側緣部以合掌狀態熔接而構成，於該熔接部內存在上述彈性纖維。於上述側封部之外側端面，上述彈性纖維之端部未較其周邊部更向外側突出。 The present invention relates to a pant type disposable diaper comprising: an absorbent body; and an exterior body disposed on a non-skin opposing side of the absorbent body and fixing the absorbent body; and in the ventral portion A pair of side seal portions, a waist opening portion, and a pair of leg opening portions are formed by joining both side edges of the outer casing to the side edges of the outer casing in the back side portion. The exterior system includes a stretch sheet comprising elastic fibers and inelastic fibers. The side seal portion is configured such that both side edges of the outer casing in the front side portion and the both side edges of the outer casing in the back side portion are welded together, and the above-mentioned welded portion is present in the welded portion. Elastic fiber. The end portion of the elastic fiber protrudes outward from the peripheral portion of the outer end surface of the side seal portion.

又，本發明(第1發明)係一種褲型拋棄式尿布，其包含：吸收性本體；及外裝體，其配置於該吸收性本體之非肌膚對向面側並將該吸收性本體固定；且腹側部中之該外裝體之兩側緣部與背側部中之該外裝體之兩側緣部接合而形成有一對側封部、腰部開口部及一對腿部開口部。上述外裝體係包含積層體而構成，該積層體為包含彈性纖維及非彈性纖維之伸縮片材與不包含彈性纖維之非伸縮片材之積層體。上述側封部之厚度大於構成其之上述腹側部及上述背側部各者之除該側封部以外之部分之厚度。於上述側封部之外側端面形成有該外側端面平滑之平滑區域，且於該平滑區域內存在上述彈性纖維。 Further, the present invention (first invention) is a pants-type disposable diaper comprising: an absorbent body; and an exterior body disposed on a non-skin opposing side of the absorbent body and fixing the absorbent body And a pair of side seal portions, a waist opening portion, and a pair of leg opening portions are formed by joining both side edges of the outer casing in the front side portion and the side edges of the outer casing in the back side portion . The exterior system includes a laminate including a laminate of an elastic sheet and an inelastic fiber and a non-stretch sheet which does not include an elastic fiber. The thickness of the side seal portion is larger than the thickness of a portion other than the side seal portion of each of the front side portion and the back side portion constituting the side seal portion. A smooth region in which the outer end surface is smooth is formed on an outer end surface of the side seal portion, and the elastic fiber is present in the smooth region.

又，本發明(第2發明)係一種褲型拋棄式尿布，其包含：吸收性本體；及外裝體，其配置於該吸收性本體之非肌膚對向面側並將該吸收性本體固定；且腹側部中之該外裝體之兩側緣部與背側部中之該外裝體之兩側緣部接合而形成有一對側封部、腰部開口部及一對腿部開口部。上述外裝體係包含伸縮片材而構成。該伸縮片材具有於以非彈性纖維為主體之可伸長之纖維層之一面接合有線狀之彈性絲之構成，於該外裝體中之除上述側封部以外之部分，該非彈性纖維之一部分與該彈性絲熔接而埋沒於該彈性絲中。於上述側封部之外側端面，形成有複數根上述非彈性纖維之球狀之端部密集而形成之球體密集區域，且於該區域內存在上述彈性絲之端部。 Further, the present invention (second invention) is a pants-type disposable diaper comprising: an absorbent body; and an exterior body disposed on a non-skin opposing side of the absorbent body and fixing the absorbent body And a pair of side seal portions, a waist opening portion, and a pair of leg opening portions are formed by joining both side edges of the outer casing in the front side portion and the side edges of the outer casing in the back side portion . The exterior system includes a stretch sheet. The elastic sheet has a structure in which one of the extensible fiber layers mainly composed of the inelastic fibers is bonded to the linear elastic yarn, and a part of the inelastic fiber except the side seal portion in the outer casing The elastic yarn is welded and buried in the elastic yarn. A spherical dense region in which a plurality of spherical end portions of the inelastic fibers are densely formed is formed on an outer end surface of the side seal portion, and an end portion of the elastic yarn is present in the region.

又，本發明(第2發明)係上述褲型拋棄式尿布之製造方法。包括如下步驟：使包含上述腹側部之複數個前身片於一方向相連而形成之前身片連續體與包含上述背側部之複數個後身片於一方向相連而形成之後身片連續體重疊而獲得尿布連續體，於使該尿布連續體沿該尿布連續體中之上述伸縮片材之伸縮方向伸長之狀態下，將該尿布連續體中之上述側封部之形成預定部位熔斷而形成該側封部。 Moreover, the present invention (second invention) is a method for producing the above-described pant type disposable diaper. The method includes the following steps: connecting a plurality of front body pieces including the ventral side portion in one direction to form a front body piece continuous body and a plurality of back body pieces including the back side portion connected in one direction to form a body piece continuous body overlap And obtaining a diaper continuous body, wherein the diaper continuous body is stretched in a direction in which the stretchable sheet in the diaper continuous body is stretched, and the predetermined portion of the side seal portion in the diaper continuous body is melted to form the diaper continuous body Side seals.

1‧‧‧尿布 1‧‧‧ diapers

1A‧‧‧尿布 1A‧‧‧ diapers

2‧‧‧吸收性本體 2‧‧‧Absorbable ontology

3‧‧‧外裝體 3‧‧‧Outer body

3a‧‧‧側部 3a‧‧‧ side

3F‧‧‧側緣部 3F‧‧‧lateral edge

3R‧‧‧側緣部 3R‧‧‧lateral edge

3W‧‧‧厚度 3W‧‧‧ thickness

4‧‧‧側封部 4‧‧‧Side seals

4'‧‧‧側封部形成預定部位 4'‧‧‧The side seal forms the intended part

4W‧‧‧厚度 4W‧‧‧thickness

5‧‧‧腰部開口部 5‧‧‧Low opening

6‧‧‧腿部開口部 6‧‧‧ leg opening

10‧‧‧尿布連續體 10‧‧‧ diaper continuum

21‧‧‧正面片材 21‧‧‧Front sheet

22‧‧‧背面片材 22‧‧‧ Back sheet

23‧‧‧吸收體 23‧‧‧Acceptor

24‧‧‧側方翻邊 24‧‧‧Front side flange

25‧‧‧側方翻邊彈性構件 25‧‧‧Front flanged elastic members

30‧‧‧伸縮片材 30‧‧‧Flexible sheet

30'‧‧‧複合體 30'‧‧‧Compound

31‧‧‧外層片材 31‧‧‧ outer sheet

32‧‧‧內層片材 32‧‧‧ Inner sheet

33‧‧‧彈性絲 33‧‧‧elastic yarn

33a‧‧‧端部 33a‧‧‧End

34‧‧‧非彈性纖維 34‧‧‧Inelastic fiber

34a‧‧‧端部 34a‧‧‧End

35‧‧‧球體密集區域 35‧‧‧Spherical dense areas

36‧‧‧非伸縮片材 36‧‧‧ Non-stretch sheet

40‧‧‧外側端面 40‧‧‧Outside end face

51‧‧‧腰部彈性構件 51‧‧‧Low elastic members

61‧‧‧紡絲噴嘴 61‧‧‧Spinning nozzle

62‧‧‧紡絲頭 62‧‧‧ Spinning head

63‧‧‧夾輥 63‧‧‧ nip rollers

64‧‧‧齒槽輥 64‧‧‧ Cogging roller

65‧‧‧齒槽輥 65‧‧‧ Cogging roller

CD‧‧‧寬度方向 CD‧‧‧width direction

F‧‧‧腹側部 F‧‧‧ Ventral side

LH‧‧‧腿部孔 LH‧‧‧ leg hole

M‧‧‧下襠部 M‧‧‧Lower Department

MD‧‧‧搬送方向 MD‧‧‧Transport direction

R‧‧‧背側部 R‧‧‧ Back side

X‧‧‧縱方向 X‧‧‧ longitudinal direction

Y‧‧‧橫方向 Y‧‧‧ horizontal direction

圖1係模式性地表示本發明(第1發明)之褲型拋棄式尿布之一實施態樣之立體圖。 Fig. 1 is a perspective view schematically showing an embodiment of a pant type disposable diaper according to the first aspect of the invention.

圖2係模式性地表示圖1所示之尿布之展開且伸長狀態之俯視圖。 Fig. 2 is a plan view schematically showing the unfolded and stretched state of the diaper shown in Fig. 1.

圖3係模式性地表示圖1之I-I線剖面之剖面圖。 Fig. 3 is a cross-sectional view schematically showing a cross section taken along line I-I of Fig. 1.

圖4係模式性地表示用作圖1所示之尿布之外裝體之伸縮片材的局部破斷立體圖。 Fig. 4 is a partially broken perspective view schematically showing a stretch sheet used as an outer casing of the diaper shown in Fig. 1.

圖5係圖1所示之尿布之腰部開口部擴開之狀態下的單側之側封部之一部分之外側端面及其附近的剖面立體圖。 Fig. 5 is a cross-sectional perspective view showing the outer end surface of one side of the side seal portion on one side in a state in which the waist opening portion of the diaper shown in Fig. 1 is expanded.

圖6係模式性地表示圖1所示之尿布之製造步驟之一部分之立體圖。 Fig. 6 is a perspective view schematically showing a part of the manufacturing steps of the diaper shown in Fig. 1.

圖7係模式性地表示適合用於圖4所示之伸縮片材之製造的裝置之立體圖。 Fig. 7 is a perspective view schematically showing an apparatus suitable for use in the manufacture of the stretch sheet shown in Fig. 4.

圖8係模式性地表示本發明(第2發明)之褲型拋棄式尿布之一實施態樣之立體圖。 Fig. 8 is a perspective view schematically showing an embodiment of a pant type disposable diaper according to the present invention (second invention).

圖9係局部破斷地模式性表示圖8所示之尿布之展開且伸長狀態之俯視圖。 Fig. 9 is a plan view schematically showing the unfolded and stretched state of the diaper shown in Fig. 8 in a partially broken manner.

圖10係模式性地表示圖8之I-I線剖面之剖面圖。 Fig. 10 is a cross-sectional view schematically showing a cross section taken along line I-I of Fig. 8.

圖11係圖8所示之尿布之腰部開口部擴開之狀態下的單側之側封部之一部分之外側端面及其附近的剖面立體圖。 Fig. 11 is a cross-sectional perspective view showing the outer end surface of one side of the side seal portion on one side in a state in which the waist opening portion of the diaper shown in Fig. 8 is expanded.

圖12係模式性地表示圖8所示之尿布之側封部之外側端面及其附近的剖面圖。 Fig. 12 is a cross-sectional view schematically showing the outer end surface of the side seal portion of the diaper shown in Fig. 8 and its vicinity.

圖13係模式性地表示圖8所示之尿布之製造步驟之一部分的立體圖。 Fig. 13 is a perspective view schematically showing a part of the manufacturing steps of the diaper shown in Fig. 8.

近年來，期望褲型拋棄式尿布具有與普通內褲相同之外觀。然而，褲型拋棄式尿布包含普通內褲中不存在之側封部，從而先前之側封部較周邊部更向尿布外側突出，於尿布之外觀上非常顯眼，因此現狀為褲型拋棄式尿布之外觀難以謂之為與內褲相同。又，由於固定在外裝體之線狀彈性構件之端部自側封部之外側端面突出，故而該外側端面為刺紮之肌膚觸感，而有於穿著尿布時以手指觸碰時感到疼痛之情形，此種側封部之觸感亦成為將褲型拋棄式尿布與普通內褲區分開之較大因素。即，由於自側封部之外側端面突出之線狀彈性構件之端部為例如藉由熔融而凝固並硬化之樹脂或與熱熔融同時地被壓縮而成為突起狀之樹脂，且於側封部之外側端面存在多個此種突起狀之樹 脂，故而有於以手指觸碰該外側端面時因手指被該樹脂刺紮而感到疼痛之情形。 In recent years, pants-type disposable diapers have been expected to have the same appearance as ordinary underwear. However, the pant-type disposable diaper includes a side seal portion which is not present in the ordinary underwear, so that the front side seal portion protrudes more toward the outer side of the diaper than the peripheral portion, and the appearance of the diaper is conspicuous, so the present state is a pant-type disposable diaper. The appearance is hardly the same as the underwear. Further, since the end portion of the linear elastic member fixed to the outer casing protrudes from the outer end surface of the side seal portion, the outer end surface is the sensation of the punctured skin, and the pain is felt when the diaper is touched by the finger. In this case, the touch of the side seal portion also becomes a larger factor for distinguishing the pant type disposable diaper from the ordinary underwear. In other words, the end portion of the linear elastic member that protrudes from the outer end surface of the side seal portion is, for example, a resin that is solidified and hardened by melting or a resin that is compressed and melted simultaneously with heat fusion, and is formed in a side seal portion. There are a plurality of such protruding trees on the outer end surface The fat is in a situation where the finger is touched by the resin and the pain is felt when the finger is touched by the outer end surface.

作為對褲型拋棄式尿布賦予與普通內褲相同之外觀之方法，考慮有如下方法：藉由切割器等切斷機構將使用熱軋裝置或如專利文獻2中所記載之超音波熔接等按照常規方法而形成的先前之側封部之前端部物理性地切斷，藉此，使該側封部之自尿布外表面突出之高度變低。但，由於按照常規方法形成之側封部係將外裝體沿厚度方向壓縮而形成，故而該側封部中之形成材料之熔接部之厚度(寬度)相對較薄，從而若將該厚度較薄之熔接部物理性地切斷，則有該切斷端部成為朝向尿布外側尖銳之突起狀之樹脂，於以手觸碰該切斷端部時因手被突起狀之樹脂刺紮而感到刺痛之虞。 As a method of giving the pants-type disposable diaper the same appearance as that of the ordinary underwear, a method of using a hot rolling device or ultrasonic welding as described in Patent Document 2 by a cutting mechanism such as a cutter is considered as usual. The front end portion of the previous side seal portion formed by the method is physically cut, whereby the height of the side seal portion protruding from the outer surface of the diaper is lowered. However, since the side seal portion formed according to the conventional method is formed by compressing the outer casing in the thickness direction, the thickness (width) of the welded portion of the material forming material in the side seal portion is relatively thin, so that if the thickness is compared When the thin welded portion is physically cut, the cut end portion is a resin that is sharply pointed toward the outer side of the diaper, and the hand is felt by the protruding resin when the hand is touched by the cut end portion. Stinging.

又，由於先前之褲型拋棄式尿布中之側封部較周邊部更向尿布外側大幅突出，且前身片之左右兩側緣與後身片之左右兩側緣之接合部(熔接部)之寬度通常為厘米級尺寸且相對較大，故而存在如下等問題：有於脫下尿布時不易撕開，且若以手指觸碰會感到疼痛之情形。於脫下尿布時，通常藉由隔著側封部以手抓持一側(前身片)與另一側(後身片)並沿上下方向(尿布之縱方向)拉拽而將該側封部撕開，從而側封部中之接合部之寬度較小者更容易撕開。尚未提供如下之褲型拋棄式尿布：具有如內褲般之外觀，即便觸碰到側封部亦不易感到疼痛，且於脫下時容易於側封部撕開。 Further, since the side seal portion in the conventional pant-type disposable diaper protrudes more toward the outer side of the diaper than the peripheral portion, and the joint portion (welding portion) of the left and right side edges of the front piece and the left and right side edges of the back piece The width is usually a centimeter-size and relatively large, so there are problems such as that it is difficult to tear when the diaper is taken off, and that pain may be felt if touched with a finger. When the diaper is removed, the side seal is usually held by grasping one side (front body piece) and the other side (rear body piece) by hand and pulling it in the up and down direction (longitudinal direction of the diaper) through the side seal portion. The portion is torn so that the smaller the width of the joint in the side seal is easier to tear. The following pants-type disposable diaper has not been provided: it has a pant-like appearance, is not easy to feel pain even when it touches the side seal portion, and is easily torn at the side seal portion when it is taken off.

本發明(第1發明)係關於如下之褲型拋棄式尿布：具有如內褲般之外觀，即便觸碰到側封部亦不易感到疼痛，且於脫下時容易於側封部撕開。 The present invention (first invention) relates to a pant-type disposable diaper having a pant-like appearance, which is less likely to be painful even when the side seal portion is touched, and is easily torn at the side seal portion when it is taken off.

又，本發明(第2發明)係關於如下之褲型拋棄式尿布及其製造方法，該褲型拋棄式尿布雖然包含側封部，但具有如內褲般之外觀，且即便觸碰到側封部亦不易感到疼痛。 Moreover, the present invention (second invention) relates to a pants-type disposable diaper having a side-sealed portion, but having a side-like portion, and having a side cover, even if it touches the side seal, and a method for producing the same The department is also not easy to feel pain.

以下，一面參照圖式一面基於較佳之實施態樣對本發明(第1發明)進行說明。如圖1~圖3所示，作為本發明之褲型拋棄式尿布之一實施態樣的尿布1為如下褲型拋棄式尿布，即，包含：吸收性本體2；及外裝體3，其配置於該吸收性本體2之非肌膚對向面側並將該吸收性本體2固定；且腹側部F中之外裝體3之沿縱方向X之兩側緣部3F、3F與背側部R中之外裝體3之沿縱方向X之兩側緣部3R、3R接合而形成有一對側封部4、4、腰部開口部5及一對腿部開口部6、6。 Hereinafter, the present invention (first invention) will be described based on preferred embodiments with reference to the drawings. As shown in FIG. 1 to FIG. 3, the diaper 1 which is one embodiment of the pants-type disposable diaper of the present invention is a pants-type disposable diaper, that is, includes: an absorbent body 2; and an exterior body 3, Disposed on the non-skin opposing side of the absorbent body 2 and fixing the absorbent body 2; and the side edges 3F, 3F and the back side of the outer casing 3 in the longitudinal direction X in the front side portion F In the portion R, the side edges 3R and 3R of the outer casing 3 in the longitudinal direction X are joined to each other to form a pair of side seal portions 4 and 4, a waist opening portion 5, and a pair of leg opening portions 6 and 6.

尿布1於如圖2所示之展開且伸長狀態之俯視下，具有相當於穿著者之前後方向之縱方向X與正交於其之橫方向Y。尿布1可劃分為於穿著時配置於***部之下襠部M、以及位於其縱方向X之前後之腹側部F及背側部R。縱方向X為自腹側部F經由下襠部M向背側部R延伸之方向。下襠部M為於沿著該縱方向X之兩側緣部形成有腿部開口部6、6形成用凹陷部之區域。 The diaper 1 has a longitudinal direction X corresponding to the front and rear directions of the wearer and a transverse direction Y orthogonal thereto in a plan view in which the diaper 1 is unfolded and stretched as shown in Fig. 2 . The diaper 1 can be divided into a crotch portion M disposed under the crotch portion when worn, and a ventral side portion F and a back side portion R located before and after the longitudinal direction X thereof. The longitudinal direction X is a direction extending from the abdominal side portion F to the back side portion R via the lower jaw portion M. The crotch portion M is a region in which the leg openings 6 and 6 are formed with recess portions along the both side edges of the longitudinal direction X.

再者，於本說明書中，肌膚對向面為拋棄式尿布或其構成構件(例如吸收性本體2)中之於穿著拋棄式尿布時面向穿著者之肌膚側之面，非肌膚對向面為拋棄式尿布或其構成構件中之於穿著拋棄式尿布時面向肌膚側之相反側(穿衣側)之面。又，縱方向X與沿拋棄式尿布或作為其構成構件之吸收性本體2之長邊之方向(長度方向)一致，橫方向Y與拋棄式尿布或作為其構成構件之吸收性本體2之寬度方向一致。 Further, in the present specification, the skin facing surface is a disposable diaper or a constituent member thereof (for example, the absorbent body 2) facing the skin side of the wearer when the disposable diaper is worn, and the non-skin facing surface is The surface of the disposable diaper or its constituent members on the opposite side (dressing side) facing the skin side when the disposable diaper is worn. Further, the longitudinal direction X coincides with the direction (longitudinal direction) of the long side of the disposable diaper or the absorbent body 2 as a constituent member, and the width Y and the width of the disposable diaper or the absorbent body 2 as a constituent member thereof. The direction is the same.

如圖2所示，吸收性本體2具備：正面片材21，其具有一方向(縱方向X)相對較長之縱長之形狀，且形成肌膚對向面；背面片材22，其形成非肌膚對向面；及液體保持性之吸收體23，其介置於該等兩片材21、22間；且吸收體23具有於與縱方向X相同之方向上較長之形狀。吸收性本體2係以其長度方向與展開且伸長狀態(圖2所示之狀態)下之尿布1之縱方向X一致之方式藉由公知之接合手段(接著劑等)接合於外 裝體3之中央部。 As shown in FIG. 2, the absorbent body 2 is provided with a front sheet 21 having a longitudinally long shape in one direction (longitudinal direction X) and forming a skin facing surface; the back sheet 22 is formed non-formed The skin facing surface; and the liquid retaining body 23 are interposed between the two sheets 21 and 22; and the absorber 23 has a shape elongated in the same direction as the longitudinal direction X. The absorbent body 2 is joined to the outside by a known joining means (adhesive or the like) such that the longitudinal direction thereof coincides with the longitudinal direction X of the diaper 1 in the unfolded and stretched state (state shown in Fig. 2). The central part of the body 3.

作為構成吸收性本體2之正面片材21、背面片材22及吸收體23，可分別無特別限制地使用該技術領域中先前所使用之各種。作為正面片材21，例如可使用經實施親水化處理之各種不織布或開孔膜等液體透過性之片材。又，作為背面片材22，可使用液體不透過性之材料或撥水性之材料。作為液體不透過性之材料，可使用樹脂膜、或具有微細孔且具有透濕性之樹脂膜、樹脂膜與不織布等之層壓材等，作為撥水性之材料，可使用包含紡黏-熔噴-紡黏等之多層構造之複合不織布、紡黏不織布、熱黏不織布、熱風不織布等。作為吸收體23，可使用包含含有吸水性聚合物之粒子及紙漿纖維等纖維材料之吸收性芯體而構成者，該吸收性芯體亦可由衛生紙等包芯片材被覆。 As the front sheet 21, the back sheet 22, and the absorber 23 constituting the absorbent body 2, various types previously used in the technical field can be used without particular limitation. As the front sheet 21, for example, a liquid-permeable sheet such as various non-woven fabrics or perforated films subjected to hydrophilization treatment can be used. Further, as the back sheet 22, a material that is impervious to liquid or a material that is water-repellent can be used. As the material for liquid impermeability, a resin film, a resin film having micropores and moisture permeability, a laminate such as a resin film and a non-woven fabric, or the like can be used, and as a water-repellent material, a spunbond-melt can be used. Composite non-woven fabric, spunbonded non-woven fabric, hot-adhesive non-woven fabric, hot air non-woven fabric, etc., which are multi-layered structures such as spray-spun bonding. As the absorber 23, an absorbent core including a fiber material containing a water-absorbent polymer and a fiber material such as pulp fibers may be used, and the absorbent core may be coated with a core material such as a toilet paper.

如圖2所示，於吸收性本體2之沿著縱方向X之左右兩側，設置有由抗液性或撥水性且透氣性之薄片材所構成的側方翻邊24、24。各側方翻邊24藉由沿著自由端以伸長狀態配置之側方翻邊彈性構件25之收縮而立起，阻止液體朝橫方向Y流出。此處，所謂展開且伸長狀態係指如下狀態：將側封部剝離，使尿布成為展開狀態，使該展開狀態之尿布之各部分之彈性構件伸長，將該尿布擴展至成為設計尺寸(與於完全排除彈性構件之影響之狀態下呈平面狀擴展時之尺寸相同)為止。 As shown in Fig. 2, side burrs 24, 24 made of a liquid-repellent or water-repellent and gas permeable sheet material are provided on both sides of the absorbent body 2 in the longitudinal direction X. Each side flange 24 is raised by contraction of the side flange elastic member 25 disposed in an extended state along the free end, preventing the liquid from flowing out in the lateral direction Y. Here, the unfolded and stretched state refers to a state in which the side seal portion is peeled off, the diaper is brought into an unfolded state, and the elastic member of each portion of the diaper in the unfolded state is stretched, and the diaper is expanded to a design size (and Until the influence of the elastic member is completely excluded, the dimensions are the same when the plane is expanded.

外裝體3係包含積層有2片片材31、32之構造之伸縮片材30而構成。如圖2所示，外裝體3之縱方向X之前後端部分別向肌膚對向面側回折，於藉由該回折而相對向之2片外裝體3、3(2片非伸縮片材36、36)間，藉由接著劑以伸長狀態接合固定有複數根線狀之腰部彈性構件51。藉此，於腰部開口部5之開口端部形成腰部皺褶。 The exterior body 3 is configured to include an elastic sheet 30 having a structure in which two sheets 31 and 32 are laminated. As shown in Fig. 2, the rear end portion of the outer casing 3 in the longitudinal direction X is folded back toward the opposite side of the skin, and the outer casings 3 and 3 (two non-stretched sheets) are opposed to each other by the folding back. Between the materials 36 and 36), a plurality of linear elastic members 51 are joined and fixed in an extended state by an adhesive. Thereby, a waist gather is formed at the opening end portion of the waist opening portion 5.

於本實施態樣中，如圖2及圖3所示，外裝體3係包含伸縮片材30與非伸縮片材36之積層體而構成。伸縮片材30包含彈性纖維[線狀之 彈性絲33(參照圖4)]及非彈性纖維兩者，相對於此，非伸縮片材36不包含作為伸縮片材30之必需構成構件之彈性纖維，且實質上不具有伸縮性。此處所提及之伸縮性係片材自身之伸縮性。非伸縮片材36較佳為於縱方向X或橫方向Y不具有伸縮性，且較佳為於兩方向X、Y之任一者均不具有伸縮性。 In the present embodiment, as shown in FIGS. 2 and 3, the exterior body 3 is configured by including a laminate of the stretch sheet 30 and the non-stretch sheet 36. The stretch sheet 30 contains elastic fibers [linear In contrast to the elastic yarns 33 (see FIG. 4 ) and the non-elastic fibers, the non-elastic sheet 36 does not include the elastic fibers as the constituent members of the stretch sheet 30 and does not substantially have stretchability. The stretchability mentioned herein is the stretchability of the sheet itself. The non-stretch sheet 36 preferably has no stretchability in the longitudinal direction X or the transverse direction Y, and preferably has no stretchability in either of the directions X and Y.

所謂片材於某一方向實質上不具有伸縮性，意指即便對該片材施加沿該某一方向拉伸之力，該片材亦幾乎不伸長。例如對於長度15cm×寬度5cm之樣品，利用TENSILON等材料拉伸試驗機將該樣品沿長度方向拉伸，於該樣品斷裂時之斷裂伸長率為10%以下之情形時，該樣品於長度方向實質上不具有伸縮性。再者，所謂斷裂伸長率可以(斷裂時之該樣品長度一該樣品原本之長度)/(該樣品原本之長度)×100而算出。 The sheet does not substantially have stretchability in a certain direction, meaning that the sheet hardly stretches even if a force of stretching in the direction is applied to the sheet. For example, for a sample having a length of 15 cm × a width of 5 cm, the sample is stretched in the longitudinal direction by a tensile tester such as TENSILON, and when the elongation at break of the sample is 10% or less, the sample is substantially in the longitudinal direction. It is not flexible. Further, the elongation at break can be calculated (the length of the sample at the time of the fracture - the original length of the sample) / (the original length of the sample) × 100.

於外裝體3中，伸縮片材30與非伸縮片材36係於該伸縮片材30之伸長狀態下以相對向之面接合，因此，外裝體3整體至少於伸縮片材30中之彈性絲33延伸之方向(橫方向Y)具有伸縮性。於本實施態樣中，兩片材30、36係經由熱熔接著劑等接著劑，於兩者之相對向面之實質整個區域接合。作為於實質整個區域接合之情形，除包含藉由塗佈槍等對片材30及/或片材36整面塗佈而利用所塗佈之接著劑使兩者接著之情形以外，亦包含藉由噴槍或螺旋槍、輥形式之塗佈機等，以相同之圖案使兩片材30、36間完全接著之情形。 In the outer casing 3, the elastic sheet 30 and the non-stretch sheet 36 are joined to each other in an extended state in which the stretch sheet 30 is stretched. Therefore, the outer body 3 as a whole is at least in the stretch sheet 30. The direction in which the elastic yarn 33 extends (the lateral direction Y) is stretchable. In the present embodiment, the two sheets 30 and 36 are joined to each other over substantially the entire area of the opposing faces via an adhesive such as a hot-melt adhesive. In the case of joining substantially the entire region, in addition to coating the entire surface of the sheet 30 and/or the sheet 36 by a coating gun or the like, and applying the applied adhesive to bring the two together, it also includes The two sheets 30, 36 are completely joined by the same pattern by a spray gun or a screw gun, a coater in the form of a roll or the like.

作為非伸縮片材36，較佳地使用利用各種製法所得之不織布，例如為紡黏不織布、熱風不織布、針軋不織布等。該等中，較佳為紡黏不織布。紡黏不織布較佳為將纖維配向方向設為與伸縮片材30中之彈性絲33延伸之方向(橫方向Y)相同之方向。作為用作非伸縮片材36之不織布之構成纖維，例如可列舉包含聚乙烯(PE)、聚丙烯(PP)、聚對苯二甲酸乙二酯(PET)或聚對苯二甲酸丁二酯(PBT)等聚酯、聚醯胺 等之纖維等。構成用作非伸縮片材36之不織布之纖維既可為短纖維亦可為長纖維，既可為親水性亦可為撥水性。又，亦可使用芯鞘型或並列型之複合纖維、分割纖維、異形剖面纖維、捲縮纖維、熱縮纖維等。該等纖維可單獨使用1種或組合2種以上而使用。 As the non-elastic sheet 36, a non-woven fabric obtained by various methods, for example, a spunbonded nonwoven fabric, a hot air non-woven fabric, a needle-punched nonwoven fabric or the like is preferably used. Among these, a spunbond nonwoven fabric is preferred. The spunbonded nonwoven fabric preferably has a direction in which the fibers are aligned in the same direction as the direction in which the elastic yarns 33 in the stretch sheet 30 extend (the lateral direction Y). Examples of the constituent fibers of the nonwoven fabric used as the non-stretch sheet 36 include polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), or polybutylene terephthalate. (PBT) and other polyesters, polyamines Wait for the fiber and so on. The fibers constituting the non-woven fabric used as the non-stretch sheet 36 may be short fibers or long fibers, and may be hydrophilic or water-repellent. Further, a core-sheath type or a side-by-side type composite fiber, a divided fiber, a profiled cross-section fiber, a crimped fiber, a heat-shrinkable fiber, or the like can be used. These fibers may be used alone or in combination of two or more.

就更確實地形成下述平滑區域35之觀點而言，非伸縮片材36較佳為由1種特定材料形成，或包含佔該非伸縮片材36之全部形成材料之90質量%以上之1種特定材料。即，非伸縮片材36較佳為僅由例如PP形成，或PP佔非伸縮片材36之全部形成材料之90質量%以上。因此，就該觀點而言，作為非伸縮片材36(不織布)之構成纖維，較佳為使用由1種樹脂所形成之單一纖維(例如PP之單一纖維)而並非複合纖維或分割纖維等包含複數種樹脂之纖維。 The non-stretch sheet 36 is preferably formed of one specific material or contains 90% by mass or more of all the forming materials of the non-stretch sheet 36, from the viewpoint of forming the smooth region 35 as described below. Specific materials. That is, the non-stretch sheet 36 is preferably formed of, for example, only PP, or PP accounts for 90% by mass or more of all the forming materials of the non-stretch sheet 36. Therefore, from the viewpoint of the constituent fibers of the non-stretch sheet 36 (non-woven fabric), it is preferable to use a single fiber (for example, a single fiber of PP) formed of one type of resin, and not a composite fiber or a split fiber. A plurality of fibers of a resin.

於本實施態樣中，如圖2及圖3所示，伸縮片材30形成尿布1之外表面(外裝體3之非肌膚對向面)，非伸縮片材36形成尿布1之內表面(外裝體3之肌膚對向面)。於側封部4之厚度方向(圖3之上下方向)之中央部，存在腹側部F側之1片非伸縮片材36與背側部R側之1片非伸縮片材36之共2片非伸縮片材36，且隔著2片該非伸縮片材36於該厚度方向之兩側分別存在伸縮片材30。 In the present embodiment, as shown in FIGS. 2 and 3, the stretch sheet 30 forms the outer surface of the diaper 1 (the non-skin opposing surface of the outer body 3), and the non-elastic sheet 36 forms the inner surface of the diaper 1. (The skin opposite to the outer body 3). In the central portion of the side seal portion 4 in the thickness direction (the upper-lower direction in FIG. 3), there is a total of one non-elastic sheet 36 on the side of the front side portion F and one non-stretch sheet 36 on the side of the back side portion R. The sheet is non-stretched sheet 36, and the stretch sheet 30 is present on both sides in the thickness direction via the two sheets of the non-stretch sheet 36.

側封部4係由構成外裝體3之複數片片材(外層片材31、內層片材32、非伸縮片材36)之緣部於重疊之狀態下熔接而形成，且具有熔接部。就使側封部4不易顯眼而對尿布1賦予如內褲般之外觀之觀點而言，側封部4(側封部4之熔接部)之厚度(寬度)4W(參照圖3)理想為較小，但若過小，則側封部4成為突起狀而使人感到疼痛。就該觀點而言，側封部4之厚度4W較佳為0.2mm以上，進而較佳為0.25mm以上，而且，較佳為2mm以下，進而較佳為1.5mm以下，更具體而言，較佳為0.2~2mm，進而較佳為0.25~1.5mm。若側封部4之厚度(熔接部之寬度)4W為此種毫米級尺寸，則可發揮熔接部之寬度為厘米 級尺寸之先前之側封部難以發揮之效果，例如為下述等效果：於脫下尿布時等容易撕開；即便以手指觸碰亦不易感到疼痛；由於較小而不顯眼，故而可對尿布賦予如同內褲之外觀。作為可將厚度4W調整為該範圍之方法之一例，可列舉如下方法：使用雷射光作為外裝體3(片材31、32、36)[下述尿布連續體(前身片連續體及後身片連續體)]之熔斷手段，對外裝體3中之側封部4之形成預定部位照射雷射光而將其熔斷，藉此形成側封部4。 The side seal portion 4 is formed by welding the edges of the plurality of sheets (the outer layer sheet 31, the inner layer sheet 32, and the non-stretch sheet 36) constituting the outer casing 3 in a state of being overlapped, and has a welded portion. . The thickness (width) 4W (see FIG. 3) of the side seal portion 4 (the welded portion of the side seal portion 4) is ideally compared with respect to the fact that the side seal portion 4 is less conspicuous and the diaper 1 is provided with a pant-like appearance. It is small, but if it is too small, the side seal part 4 becomes a protrusion shape, and it feels pain. From this point of view, the thickness 4W of the side seal portion 4 is preferably 0.2 mm or more, more preferably 0.25 mm or more, and further preferably 2 mm or less, further preferably 1.5 mm or less, and more specifically, more specifically Preferably, it is 0.2 to 2 mm, and more preferably 0.25 to 1.5 mm. If the thickness of the side seal portion 4 (the width of the welded portion) 4W is such a millimeter size, the width of the welded portion can be made cm. The effect of the previous side seal portion of the step size is difficult to exert, for example, an effect such as easy to tear when the diaper is removed, and it is not easy to feel pain even when touched by a finger; since it is small and inconspicuous, it can be The diaper imparts an appearance like a panty. As an example of a method in which the thickness 4W can be adjusted to the range, a method in which laser light is used as the exterior body 3 (sheets 31, 32, and 36) [the following diaper continuum (front body continuum and back body) is exemplified. In the continuum of the sheet continuum, the predetermined portion of the side seal portion 4 in the outer casing 3 is irradiated with laser light and melted, whereby the side seal portion 4 is formed.

如圖3所示，側封部4(側封部4之熔接部)之厚度(寬度)4W大於構成其之腹側部F及背側部R各者之除該側封部4(熔接部)以外之部分之厚度3W。藉由使用熱軋裝置等加壓加熱機構之側封部之形成方法，難以實現該厚度之特定之大小關係[腹側部F或背側部R之除側封部4以外之部分之厚度3W<側封部4(熔接部)之厚度4W]。使用加壓加熱機構按照常規方法而形成之側封部(熔接部)由於構成該側封部之腹側部及背側部沿厚度方向被加壓，故而該側封部之厚度小於該腹側部及該背側部原本之厚度(該腹側部及該背側部各者中之除該側封部以外之部分之厚度)。即，於具有對下述尿布連續體(前身片連續體及後身片連續體)進行加熱加壓而形成之側封部之尿布中，成為(厚度3W>厚度4W)。為了成為如本實施態樣般(厚度3W<厚度4W)，重要的是於側封部之形成步驟中，不沿厚度方向對上述尿布連續體加壓。作為未伴隨上述尿布連續體之加壓地將其分斷而形成側封部之方法，可列舉使用雷射光之熔斷。即，可列舉如下方法：使用雷射光作為上述尿布連續體之熔斷手段，對該尿布連續體中之側封部之形成預定部位照射雷射光而將其熔斷，藉此形成側封部。藉由該方法而形成之側封部滿足(厚度3W<厚度4W)之關係，與對上述尿布連續體進行加熱加壓而形成之側封部相比，觸感改善而刺痛感減少。再者，作為厚度3W之測定對象之「腹側部F或背側部R之除側封部4以外之部分」係具有與構 成側封部4之部分相同之層構成之部分，具體而言，例如可列舉位於吸收性本體2與側封部4之間之部分。 As shown in FIG. 3, the thickness (width) 4W of the side seal portion 4 (the welded portion of the side seal portion 4) is larger than the side seal portion 4 (welding portion) of each of the front side portion F and the back side portion R. The thickness of the part other than 3W. It is difficult to achieve a specific magnitude relationship of the thickness by using a method of forming a side seal portion of a pressurization heating mechanism such as a hot rolling device [thickness of a portion other than the side seal portion 4 of the front side portion F or the back side portion R 3W <Thickness 4W of the side seal portion 4 (welding portion). The side seal portion (welding portion) formed by the conventional method using the pressurizing heating mechanism is pressurized in the thickness direction because the front side portion and the back side portion constituting the side seal portion are pressed, so that the thickness of the side seal portion is smaller than the ventral side The thickness of the portion and the back side portion (the thickness of the portion other than the side seal portion of the front side portion and the back side portion). In other words, the diaper having the side seal portion formed by heating and pressurizing the diaper continuous body (the front body continuous body and the back body sheet continuous body) is (thickness 3W>thickness: 4W). In order to achieve the present embodiment (thickness 3W < thickness 4W), it is important that the diaper continuous body is not pressurized in the thickness direction in the step of forming the side seal portion. The method of forming the side seal portion without breaking the pressure of the diaper continuous body described above is exemplified by the use of laser light. In other words, a method of forming a side seal portion by irradiating a predetermined portion of the side seal portion in the diaper continuous body with the laser beam by using the laser light as the fuse means of the diaper continuous body is exemplified. The side seal portion formed by this method satisfies the relationship of (thickness 3W < thickness 4W), and the touch feeling is improved and the tingling feeling is reduced as compared with the side seal portion formed by heating and pressurizing the diaper continuous body. In addition, as the measurement target of the thickness 3W, the "ventral side portion F or the portion of the back side portion R other than the side seal portion 4" has a structure and structure. The portion in which the portions of the side seal portion 4 are formed in the same layer is specifically a portion located between the absorbent body 2 and the side seal portion 4, for example.

關於厚度4W、3W，可藉由顯微鏡(KEYENCE公司製造之VHX-1000)等以50~200倍之倍率分別觀察一個尿布之側封部中在長度方向上隔開之3個部位之剖面，於各剖面中分別求出測定對象部位之厚度，以3個部位之厚度之平均值而求出厚度4W、3W。於觀察上述剖面時，關於厚度4W係於無荷重下觀察測定對象部位，關於厚度3W係於以0.5cN/cm2之荷重將測定對象部位夾於平板間之狀態下進行觀察。 With respect to the thickness of 4W and 3W, the cross-section of the three portions of the side seal portion of the diaper which are spaced apart in the longitudinal direction can be observed by a microscope (VHX-1000 manufactured by KEYENCE Co., Ltd.) at a magnification of 50 to 200 times. The thickness of the measurement target portion was obtained for each of the cross sections, and the thicknesses of 4W and 3W were obtained from the average of the thicknesses of the three portions. When the cross-section was observed, the measurement target portion was observed under a load-free condition of 4 W, and the thickness 3W was observed while sandwiching the measurement target portion between the flat plates at a load of 0.5 cN/cm 2 .

以下，對伸縮片材30進行說明。伸縮片材30係具有於以非彈性纖維為主體之可伸長之纖維層之一面接合有線狀之彈性絲(彈性纖維)之構成者，於本實施態樣中，如圖4所示，伸縮片材30係包含外層片材31及內層片材32之2片片材、以及夾於兩片材31、32間之複數根線狀之彈性絲33而構成。片材31、32均為「以非彈性纖維為主體之可伸長之纖維層」(於圖4中，省略非彈性纖維之圖示)。以非彈性纖維為主體之片材31、32各者之非彈性纖維之含有率較佳為90質量%以上，進而較佳為91質量%以上，亦可為100質量%。如圖2及圖3所示，片材31形成尿布1之外表面(外裝體3之非肌膚對向面)，片材32形成與非伸縮片材36之接合面。 Hereinafter, the stretch sheet 30 will be described. The stretch sheet 30 has a structure in which one of the extensible fiber layers mainly composed of the inelastic fibers is bonded to a linear elastic yarn (elastic fiber). In this embodiment, as shown in FIG. 4, the stretch sheet is used. The material 30 is composed of two sheets of the outer layer sheet 31 and the inner layer sheet 32, and a plurality of linear elastic threads 33 sandwiched between the two sheets 31 and 32. Each of the sheets 31 and 32 is an "extensible fiber layer mainly composed of inelastic fibers" (in Fig. 4, the illustration of the inelastic fibers is omitted). The content of the inelastic fibers of each of the sheets 31 and 32 which are mainly composed of the inelastic fibers is preferably 90% by mass or more, more preferably 91% by mass or more, and may be 100% by mass. As shown in FIGS. 2 and 3, the sheet 31 forms the outer surface of the diaper 1 (the non-skin opposing surface of the outer casing 3), and the sheet 32 forms a joint surface with the non-stretch sheet 36.

外層片材31及內層片材32均可伸長。片材31、32可沿與彈性絲33延伸之方向(橫方向Y)相同之方向伸長。所謂可伸長包含如下情形：(a)片材31、32之構成纖維自身伸長；以及(b)即便構成纖維自身不伸長，亦因於交點結合之纖維彼此分離，或根據纖維彼此之結合等而由複數根纖維形成之立體構造於構造上發生變化，或構成纖維斷裂，而片材31、32整體伸長。 Both the outer layer sheet 31 and the inner layer sheet 32 can be elongated. The sheets 31, 32 can be elongated in the same direction as the direction in which the elastic wires 33 extend (the lateral direction Y). The extensibility includes the following cases: (a) the constituent fibers of the sheets 31, 32 are themselves elongated; and (b) even if the constituent fibers themselves are not elongated, the fibers bonded at the intersections are separated from each other, or according to the bonding of the fibers to each other, etc. The three-dimensional structure formed by the plurality of fibers changes in structure or constitutes fiber breakage, and the sheets 31, 32 are entirely elongated.

外層片材31及內層片材32亦可於與彈性絲33接合之前之原片之 狀態下已可伸長。或者，亦可於與彈性絲33接合之前之原片之狀態下無法伸長，而於與彈性絲33接合之後以可伸長之方式實施加工，而變為可伸長。作為用以使片材可伸長之具體方法，可列舉熱處理、輥間延伸、利用齒槽或齒輪之咬合延伸及利用拉幅機之拉伸延伸等。鑒於下述伸縮片材30之較佳之製造方法，就使彈性絲33與片材31、32熔接時該片材31、32之搬送性變得良好之方面而言，片材31、32較佳為於該原片之狀態下無法伸長。 The outer layer sheet 31 and the inner layer sheet 32 may also be original sheets before being joined with the elastic yarns 33. It is stretchable under the condition. Alternatively, it may not be stretched in the state of the original sheet before the elastic yarn 33 is joined, and after being joined to the elastic yarn 33, the processing may be performed in an extensible manner to become extensible. Specific examples of the method for making the sheet extensible include heat treatment, stretching between rolls, nip stretching by a tooth groove or a gear, and stretching by a tenter. In view of the preferred manufacturing method of the stretch sheet 30 described below, it is preferable that the sheets 31, 32 are excellent in the conveyance property of the sheets 31, 32 when the elastic yarns 33 and the sheets 31, 32 are welded. It cannot be stretched in the state of the original sheet.

外層片材31及內層片材32可伸長，且實質上為非彈性。所謂彈性係指可拉伸且於自拉伸之力釋放時進行收縮之性質，而片材31、32不具有該性質。於片材31、32具有彈性之情形時，作為其構成纖維，需要包含彈性樹脂之纖維，包含彈性樹脂之纖維有呈現成為使不織布之質感降低之一個因素之發黏感的傾向。因此，於本實施態樣中，使片材31、32實質上成為非彈性，而防止其質感之降低。 The outer sheet 31 and the inner sheet 32 are extensible and substantially inelastic. The term "elasticity" refers to the property of being stretchable and contracting upon release from the force of stretching, and the sheets 31, 32 do not have this property. When the sheets 31 and 32 have elasticity, the fibers constituting the elastic resin are required as the constituent fibers, and the fibers containing the elastic resin tend to exhibit a feeling of stickiness which is a factor that lowers the texture of the nonwoven fabric. Therefore, in the present embodiment, the sheets 31 and 32 are made substantially inelastic, and the texture is prevented from being lowered.

如下所述，彈性絲33係使彈性樹脂於熔融或軟化之狀態下延伸而形成者。複數根彈性絲33分別遍及伸縮片材30之全長(外裝體3之橫方向Y之全長)而實質上連續。複數根彈性絲33係以相互不交叉地於一方向(橫方向Y)延伸之方式排列。再者，於本發明中，容許因伸縮片材30之製造條件之不可避免之變動，而引起之彈性絲33之意外交叉。複數根彈性絲33只要相互不交叉，則可分別呈直線狀延伸，或亦可一面蜿蜒一面延伸。 As described below, the elastic yarn 33 is formed by extending the elastic resin in a molten or softened state. The plurality of elastic yarns 33 are substantially continuous throughout the entire length of the stretch sheet 30 (the entire length of the outer casing 3 in the lateral direction Y). The plurality of elastic wires 33 are arranged so as to extend in one direction (lateral direction Y) without crossing each other. Further, in the present invention, the accidental intersection of the elastic yarns 33 caused by the unavoidable fluctuation of the manufacturing conditions of the stretch sheet 30 is allowed. The plurality of elastic yarns 33 may extend linearly as long as they do not intersect each other, or may extend one side of the yarn.

彈性絲33實質上以非伸長狀態與外層片材31及內層片材32接合。由於彈性絲33未伸長，故而有如下優點：不會引起由伸長所致之鬆弛(蠕變)，將該彈性絲33與片材31、32貼合後之原片保存時或延伸等加工後之伸縮性不會降低。又，亦無由所捲取之原片之捲緊所致之變形。進而，例如於使彈性絲33伸長為2倍並與片材31、32貼合之情形時，若假設恢復至初始之1.3倍，則僅可自該狀態拉伸至1.7倍，而 於以非伸長狀態進行貼合之情形時，有如下優點：由於使伸縮片材伸長時之初始原點不同，故而能夠拉伸至片材31、32可伸長之長度為止或彈性長絲33之最大伸長率為止。 The elastic yarn 33 is joined to the outer layer sheet 31 and the inner layer sheet 32 in a substantially non-stretched state. Since the elastic yarn 33 is not stretched, there is an advantage that it does not cause slack (creep) due to elongation, and the original sheet after the elastic yarn 33 and the sheets 31 and 32 are bonded is stored or extended. The flexibility will not be reduced. Moreover, there is no deformation caused by the winding of the original piece taken up. Further, for example, when the elastic yarn 33 is stretched twice and attached to the sheets 31 and 32, if it is assumed to be restored to the initial 1.3 times, it can be stretched only from the state to 1.7 times. In the case of bonding in a non-stretched state, there is an advantage in that since the initial origin of the stretchable sheet is different when stretched, it is possible to stretch to the length at which the sheets 31, 32 can be stretched or the elastic filaments 33 The maximum elongation is up to now.

彈性絲33之直徑並無特別限制，但就伸縮片材30之質感與彈性絲33之生產性之平衡等觀點而言，較佳為10μm以上，進而較佳為20μm以上，而且，較佳為200μm以下，進而較佳為130μm以下，更具體而言，較佳為10~200μm，進而較佳為20~130μm。 The diameter of the elastic yarn 33 is not particularly limited, but is preferably 10 μm or more, and more preferably 20 μm or more, from the viewpoint of the balance between the texture of the elastic sheet 30 and the productivity of the elastic yarn 33. 200 μm or less, further preferably 130 μm or less, more specifically, preferably 10 to 200 μm, more preferably 20 to 130 μm.

彈性絲33之剖面可為圓形，根據情況亦有橢圓形之剖面之情況。例如於按照下述製造方法(參照圖7)製造伸縮片材30之情形時，彈性絲33之剖面有容易成為橢圓形之傾向。此情形時，於伸縮片材30中，彈性絲33較佳為以如下方式配置，即，橢圓形之長軸成為與伸縮片材30之平面方向相同之方向，且短軸成為與伸縮片材30之厚度方向相同之方向。 The cross section of the elastic yarn 33 may be circular, and depending on the case, there may be an elliptical cross section. For example, when the stretch sheet 30 is produced by the following production method (see FIG. 7), the cross section of the elastic yarn 33 tends to be elliptical. In this case, in the stretch sheet 30, the elastic yarns 33 are preferably disposed in such a manner that the long axis of the elliptical shape becomes the same direction as the planar direction of the stretch sheet 30, and the short axis becomes the stretched sheet. The thickness direction of 30 is the same direction.

就伸縮片材30表現充分之伸縮性及類似布之良好之質感等之觀點而言，相鄰之彈性絲33、33之間距(相鄰之彈性絲之中心間之距離)於彈性絲33之直徑為上述範圍之條件下，較佳為0.1mm以上，進而較佳為0.4mm以上，而且，較佳為5mm以下，進而較佳為1mm以下，更具體而言，較佳為0.1~5mm，進而較佳為0.4~1mm。 The distance between the adjacent elastic wires 33, 33 (the distance between the centers of the adjacent elastic wires) is the elastic wire 33 from the viewpoint that the stretch sheet 30 exhibits sufficient stretchability and a good texture like cloth. The diameter is preferably 0.1 mm or more, more preferably 0.4 mm or more, and further preferably 5 mm or less, more preferably 1 mm or less, and still more preferably 0.1 to 5 mm. Further preferably, it is 0.4 to 1 mm.

於伸縮片材30中，複數根彈性絲33分別遍及其全長而與外層片材31及內層片材32接合。此處，所謂「遍及其全長而接合」意指無需將與彈性絲33接觸之所有纖維(片材31、32之構成纖維)與彈性絲33接合，而以如於彈性絲33不存在有意地形成之非接合部之態樣，使彈性絲33與片材31、32之構成纖維(非彈性纖維)接合。藉由使彈性絲33遍及全長而分別與片材31、32接合，可充分地提高彈性絲33與片材31、32之接合力。其結果，即便將伸縮片材30拉伸，彈性絲33亦不易自片材31、32剝離。若彈性絲33自片材31、32剝離，則於自然狀態(鬆弛 狀態)下，於彈性絲33與片材31、32之間會產生***，伸縮片材30容易產生褶皺，而缺乏作為伸縮片材30整體之一體感。 In the stretch sheet 30, a plurality of elastic yarns 33 are joined to the outer layer sheet 31 and the inner layer sheet 32 over the entire length thereof. Here, "joining over the entire length thereof" means that it is not necessary to join all the fibers (constituting fibers of the sheets 31, 32) in contact with the elastic yarn 33 with the elastic yarn 33, so that the elastic yarn 33 does not intentionally The elastic yarn 33 is joined to the constituent fibers (non-elastic fibers) of the sheets 31 and 32 in the form of the non-joining portion formed. By joining the elastic wires 33 to the sheets 31 and 32 over the entire length, the bonding force between the elastic wires 33 and the sheets 31 and 32 can be sufficiently increased. As a result, even if the stretch sheet 30 is stretched, the elastic yarn 33 is less likely to be peeled off from the sheets 31 and 32. If the elastic yarn 33 is peeled off from the sheets 31, 32, it is in a natural state (relaxation) In the state), a bulge is generated between the elastic yarn 33 and the sheets 31 and 32, and the stretch sheet 30 is likely to be wrinkled, and lacks a sense of body as a whole of the stretch sheet 30.

又，於伸縮片材30中，外層片材31及內層片材32中所包含之多根非彈性纖維之一部分與彈性絲33熔接而埋沒於該彈性絲33中。埋沒於彈性絲33中之非彈性纖維可為存在於該彈性絲33之周圍之非彈性纖維之全部，亦可為一部分。此處所提及之(本發明之)「埋沒」係指於非彈性纖維與彈性絲33之交點，非彈性纖維中之存在於該交點之部位混入彈性絲33中之存在於該交點之部位中的狀態。因此，於本發明之埋沒中不包含非彈性纖維與彈性絲33於其等之表面以點或線進行接合之狀態。又，就提高非彈性纖維與彈性絲33之接合強度之觀點而言，非彈性纖維較佳為以其直徑之一半以上之程度埋沒於彈性絲33中。 Further, in the stretch sheet 30, one of the plurality of inelastic fibers included in the outer layer sheet 31 and the inner layer sheet 32 is welded to the elastic yarn 33 and buried in the elastic yarn 33. The inelastic fibers buried in the elastic yarns 33 may be all or part of the inelastic fibers present around the elastic yarns 33. The term "buried" as used herein refers to the intersection of the inelastic fiber and the elastic yarn 33, and the portion of the inelastic fiber which is present in the elastic yarn 33 in the portion where the intersection is present exists at the intersection. The state in . Therefore, in the burying of the present invention, the state in which the inelastic fibers and the elastic yarns 33 are joined at a point or a line on the surface thereof is not included. Further, from the viewpoint of improving the bonding strength between the inelastic fiber and the elastic yarn 33, the inelastic fiber is preferably buried in the elastic yarn 33 to a degree more than half of its diameter.

藉由使彈性絲33與外層片材31及內層片材32中所包含之非彈性纖維之接合狀態為如上所述，彈性絲33與片材31、32之接合強度變高，於使伸縮片材30伸長時不易引起兩者間之剝離。其結果，於使伸縮片材30伸長時，片材31、32追隨於彈性絲33之伸長而響應性良好地伸長，因此可發揮伸縮片材30之伸縮性變得良好之有利之效果。又，藉由使彈性絲33與片材31、32中所包含之非彈性纖維之接合狀態為如上所述，彈性絲33與片材31、32密接，而更不易感受到存在彈性絲33之部分與不存在彈性絲33之部分之階差，因此亦可發揮伸縮片材30之質感亦變得良好之有利之效果。 When the elastic yarn 33 is joined to the inelastic fibers included in the outer layer sheet 31 and the inner layer sheet 32 as described above, the bonding strength between the elastic yarn 33 and the sheets 31 and 32 is increased to allow expansion and contraction. When the sheet 30 is stretched, it is less likely to cause peeling between the two. As a result, when the stretch sheet 30 is stretched, the sheets 31 and 32 follow the elongation of the elastic yarn 33 and are elongated in response with good responsiveness. Therefore, the stretchability of the stretch sheet 30 can be improved. Further, by bonding the elastic yarn 33 to the inelastic fibers included in the sheets 31 and 32 as described above, the elastic yarn 33 is in close contact with the sheets 31 and 32, and it is less susceptible to the presence of the elastic yarn 33. The difference between the portion and the portion where the elastic yarn 33 is not present is also advantageous in that the texture of the stretch sheet 30 is also good.

再者，上述非彈性纖維於彈性絲33中之埋沒狀態於外裝體3(伸縮片材30)中，在未實施密封加工之部分會顯現，但未必於如側封部4般之經實施密封加工之部分顯現。此處，所謂密封加工係伴隨外裝體3之形成材料(樹脂)之熔融之加工，例如可列舉壓紋加工等加熱加壓加工、超音波密封加工、雷射光之照射加工等。若實施密封加工，則有最初存在之非彈性纖維於彈性絲33中之埋沒狀態發生變化，而該埋沒 狀態消失的情況。因此，非彈性纖維是否埋沒於彈性絲33中之確認應於外裝體3中之未實施密封加工之部分進行。 Further, in the state in which the inelastic fibers are buried in the elastic yarn 33 in the outer casing 3 (the stretch sheet 30), the portion which is not subjected to the sealing process is formed, but it is not necessarily implemented as the side seal portion 4 Part of the sealing process appears. Here, the sealing processing is a process of melting the material (resin) of the exterior body 3, and examples thereof include heat and pressure processing such as embossing, ultrasonic sealing processing, and laser irradiation processing. If the sealing process is performed, the buried state of the initially existing inelastic fiber changes in the elastic wire 33, and the buried state is buried. The situation where the status disappears. Therefore, whether or not the inelastic fibers are buried in the elastic yarns 33 is confirmed to be performed in the portion of the outer casing 3 which is not subjected to the sealing process.

若按照下述製造方法(參照圖7)製造伸縮片材30，則可獲得「非彈性纖維與彈性絲33熔接而埋沒於該彈性絲33中之狀態」。根據下述製造方法，未對片材31、32施加熱，且於藉由熔融紡絲而獲得之彈性絲33固化前，使該彈性絲33熔接於片材31、32，因此僅存在於該彈性絲33之周圍之纖維與該彈性絲33接合，位於較其更遠之位置之纖維係維持片材31、32之質感之狀態，故而有伸縮片材30之質感得以良好地保持之優點。 When the stretch sheet 30 is produced by the following production method (see FIG. 7), "the state in which the non-elastic fiber and the elastic yarn 33 are welded and buried in the elastic yarn 33" can be obtained. According to the following production method, heat is not applied to the sheets 31 and 32, and the elastic yarn 33 is welded to the sheets 31 and 32 before the elastic yarn 33 obtained by melt spinning is cured, so that it exists only in the sheet The fiber around the elastic yarn 33 is joined to the elastic yarn 33, and the fiber located at a position further away maintains the texture of the sheets 31 and 32, so that the texture of the stretch sheet 30 is favorably maintained.

如此，伸縮片材30中之彈性絲33與片材31、32之接合係藉由將構成片材31、32之纖維(非彈性纖維)以埋沒於彈性絲33中之狀態與該彈性絲33熔接而進行，並非使用熱熔型接著劑等接著劑而進行。因此，於片材31、32(以非彈性纖維為主體之可伸長之纖維層)與接合於其之彈性絲33之間不存在接著劑。 Thus, the bonding of the elastic yarn 33 and the sheets 31, 32 in the stretch sheet 30 is performed by burying the fibers (inelastic fibers) constituting the sheets 31, 32 in the state of the elastic yarn 33 with the elastic yarn 33. The welding is carried out without using an adhesive such as a hot-melt adhesive. Therefore, there is no adhesive between the sheets 31, 32 (the extensible fiber layer mainly composed of inelastic fibers) and the elastic yarn 33 bonded thereto.

伸縮片材30可於與彈性絲33延伸之方向(橫方向Y)相同之方向伸縮。伸縮片材30之伸縮性係因彈性絲33之彈性而表現。若將伸縮片材30沿與彈性絲33延伸之方向相同之方向拉伸，則彈性絲33及片材31、32伸長。而且，若解除伸縮片材30之拉伸，則彈性絲33收縮，片材31、32隨著該收縮而恢復成拉伸前之狀態。又，於伸縮片材30中，不存在以正交之狀態與彈性絲33結合之其他彈性絲，因此於將伸縮片材30沿與彈性絲33延伸之方向(橫方向Y)相同之方向拉伸時，該伸縮片材30以幾乎未發生於橫方向Y收縮之所謂寬度收縮的方式伸長。 The stretch sheet 30 can expand and contract in the same direction as the direction in which the elastic yarns 33 extend (the lateral direction Y). The stretchability of the stretch sheet 30 is expressed by the elasticity of the elastic yarn 33. When the stretch sheet 30 is stretched in the same direction as the direction in which the elastic yarn 33 extends, the elastic yarn 33 and the sheets 31, 32 are elongated. When the stretching of the stretch sheet 30 is released, the elastic yarn 33 contracts, and the sheets 31 and 32 return to the state before stretching as the shrinkage occurs. Further, in the stretch sheet 30, since there is no other elastic yarn bonded to the elastic yarn 33 in an orthogonal state, the stretch sheet 30 is pulled in the same direction as the direction in which the elastic yarn 33 extends (the lateral direction Y). When stretched, the stretch sheet 30 is stretched so as to shrink so as not to occur in the transverse direction Y.

對伸縮片材30之形成材料進行說明，則作為構成外層片材31及內層片材32(以非彈性纖維為主體之可伸長之纖維層)之纖維，實質上使用非彈性之非彈性纖維，具體而言，例如可列舉包含聚乙烯(PE)、聚丙烯(PP)、聚對苯二甲酸乙二酯(PET)或聚對苯二甲酸丁二酯(PBT) 等聚酯、聚醯胺等之纖維等。構成片材31、32之纖維既可為短纖維亦可為長纖維，既可為親水性亦可為撥水性。又，亦可使用芯鞘型或並列型之複合纖維、分割纖維、異形剖面纖維、捲縮纖維、熱縮纖維等。該等纖維可單獨使用1種或組合2種以上而使用。 The material for forming the stretch sheet 30 will be described as a fiber constituting the outer layer sheet 31 and the inner layer sheet 32 (the extensible fiber layer mainly composed of inelastic fibers), and substantially inelastic non-elastic fibers are used. Specifically, for example, polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) or polybutylene terephthalate (PBT) may be mentioned. Such as polyester, polyamide, and the like. The fibers constituting the sheets 31 and 32 may be short fibers or long fibers, and may be hydrophilic or water repellency. Further, a core-sheath type or a side-by-side type composite fiber, a divided fiber, a profiled cross-section fiber, a crimped fiber, a heat-shrinkable fiber, or the like can be used. These fibers may be used alone or in combination of two or more.

外層片材31及內層片材32可分別為連續長絲或短纖維之不織布。尤其就使伸縮片材30為具有厚度之蓬鬆者之觀點而言，片材31、32較佳為短纖維之不織布。作為不織布，可列舉熱風不織布、熱軋不織布、水針不織布、紡黏不織布、熔噴不織布等。片材31與片材32可為同類片材，或亦可為不同類片材。此處所提及之「同類片材」意指片材之製造工藝、片材之構成纖維之種類、構成纖維之纖維直徑或長度、片材之厚度或基重等全部相同之片材彼此。於該等中之至少一者不同之情形時，為「不同類片材」。 The outer layer sheet 31 and the inner layer sheet 32 may each be a continuous filament or a short fiber nonwoven fabric. In particular, in view of the fact that the stretch sheet 30 is a fluffy person having a thickness, the sheets 31, 32 are preferably nonwoven fabrics of short fibers. Examples of the nonwoven fabric include hot air non-woven fabric, hot rolled non-woven fabric, water jet non-woven fabric, spunbonded non-woven fabric, and melt-blown non-woven fabric. The sheet 31 and the sheet 32 may be the same type of sheet, or may be different types of sheets. The "like sheet" as referred to herein means the sheet of the manufacturing process, the kind of the constituent fibers of the sheet, the fiber diameter or length of the constituent fibers, the thickness of the sheet or the basis weight, and the like. In the case where at least one of the items is different, it is "different types of sheets".

外層片材31及內層片材32分別較佳為其構成纖維(非彈性纖維)包含低熔點成分及高熔點成分之2種成分以上。於此情形時，至少藉由低熔點成分之熱熔接，使其構成纖維彼此於纖維交點接合。作為包含低熔點成分及高熔點成分之2種成分以上之芯鞘型之複合纖維，較佳為芯為高熔點PET、PP且鞘為低熔點PET、PP、PE者。尤其若使用該等複合纖維，則與彈性絲33之熔接變強而不易引起兩者間之剝離，故而較佳。 Each of the outer layer sheet 31 and the inner layer sheet 32 is preferably composed of two or more components including a low melting point component and a high melting point component. In this case, at least the constituent fibers are joined to each other at the fiber intersection by heat fusion of the low-melting component. The core-sheath type composite fiber containing two or more components of a low melting point component and a high melting point component is preferably a core having a high melting point PET, PP and a sheath having a low melting point PET, PP, or PE. In particular, when these composite fibers are used, the fusion with the elastic yarn 33 becomes strong and it is less likely to cause peeling between the two, which is preferable.

外層片材31及內層片材32之厚度分別較佳為0.05mm以上，進而較佳為0.1mm以上，而且，較佳為5mm以下，進而較佳為1mm以下，更具體而言，較佳為0.05~5mm，進而較佳為0.1~1mm。關於片材之厚度，以0.5cN/cm2之荷重將測定對象片材夾於平板間，藉由顯微鏡(KEYENCE公司製造之VHX-1000)等以50~200倍之倍率觀察一個尿布中在長度方向上隔開之3個部位之該片材之剖面，於各剖面中分別求出厚度，以3個部位之厚度之平均值而求出片材之厚度。 又，就質感、厚度及設計性等觀點而言，片材31、32之基重分別較佳為3g/m2以上，進而較佳為5g/m2以上，而且，較佳為100g/m2以下，進而較佳為30g/m2以下，更具體而言，較佳為3~100g/m2，進而較佳為5~30g/m2。 The thickness of the outer layer sheet 31 and the inner layer sheet 32 is preferably 0.05 mm or more, more preferably 0.1 mm or more, and further preferably 5 mm or less, further preferably 1 mm or less, and more specifically, preferably. It is 0.05 to 5 mm, and more preferably 0.1 to 1 mm. With respect to the thickness of the sheet, the sheet to be measured was sandwiched between the plates at a load of 0.5 cN/cm 2 , and the length in a diaper was observed by a microscope (VHX-1000 manufactured by KEYENCE Co., Ltd.) at a magnification of 50 to 200 times. The cross-section of the sheet at three locations spaced apart in the direction was determined for each section, and the thickness of the sheet was determined by the average of the thicknesses of the three portions. Further, the basis weights of the sheets 31 and 32 are preferably 3 g/m 2 or more, more preferably 5 g/m 2 or more, and more preferably 100 g/m, from the viewpoints of texture, thickness and design. 2 or less is further preferably 30 g/m 2 or less, and more specifically, preferably 3 to 100 g/m 2 , and more preferably 5 to 30 g/m 2 .

就伸縮特性、質感、厚度、成本等觀點而言，配置於片材31、32間之複數根彈性絲33之基重(彈性絲層之基重)較佳為3g/m2以上，進而較佳為4g/m2以上，而且，較佳為30g/m2以下，進而較佳為15g/m2以下，更具體而言，較佳為3~30g/m2，進而較佳為4~15g/m2。 The basis weight (the basis weight of the elastic filament layer) of the plurality of elastic filaments 33 disposed between the sheets 31 and 32 is preferably 3 g/m 2 or more in terms of stretch characteristics, texture, thickness, cost, and the like. It is preferably 4 g/m 2 or more, and more preferably 30 g/m 2 or less, further preferably 15 g/m 2 or less, and more specifically, preferably 3 to 30 g/m 2 , and more preferably 4 to 4 15g/m 2 .

彈性絲33係例如以熱塑性彈性體或橡膠等作為原料者。尤其若將熱塑性彈性體用作原料，則可與通常之熱塑性樹脂同樣地實現使用擠出機之熔融紡絲，又，以此方式獲得之彈性絲容易熱熔接，因此適於伸縮片材30。作為熱塑性彈性體，例如可列舉SBS(苯乙烯-丁二烯-苯乙烯)、SIS(苯乙烯-異戊二烯-苯乙烯)、SEBS(苯乙烯-乙烯-丁二烯-苯乙烯)、SEPS(苯乙烯-乙烯-丙烯-苯乙烯)等苯乙烯系彈性體，烯烴系彈性體(乙烯系之α-烯烴彈性體、將乙烯、丁烯、辛烯等共聚而得之丙烯系彈性體)，聚酯系彈性體，以及聚胺基甲酸酯系彈性體等，可單獨使用該等之1種或組合2種以上而使用。又，亦可使用包含該等樹脂之芯鞘型或並列型之複合纖維。 The elastic yarn 33 is made of, for example, a thermoplastic elastomer or rubber. In particular, when a thermoplastic elastomer is used as a raw material, melt spinning using an extruder can be realized in the same manner as a usual thermoplastic resin, and the elastic yarn obtained in this manner is easily thermally welded, and thus is suitable for the stretch sheet 30. Examples of the thermoplastic elastomer include SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), and SEBS (styrene-ethylene-butadiene-styrene). A styrene-based elastomer such as SEPS (styrene-ethylene-propylene-styrene), an olefin-based elastomer (ethylene-based α-olefin elastomer, and a propylene-based elastomer obtained by copolymerizing ethylene, butene, octene, etc.) In addition, one type or a combination of two or more types may be used alone or in combination of a polyester elastomer and a polyurethane elastomer. Further, a core-sheath type or a side-by-side type composite fiber containing the resins may be used.

作為具備包含如上所述之構成之伸縮片材30而構成之外裝體3的本實施態樣之尿布1之主要特徵之一，可列舉如下方面：如圖5所示，於側封部4之外側端面40，形成有該外側端面40平滑之平滑區域35，且於該區域35內存在彈性絲33之端部33a。如圖3所示，側封部4之外側端面40位於尿布1之兩側部，且遍及側封部4之長度方向(圖1之上下方向)之全長而連續。外側端面40至少於尿布1之穿著狀態(腰部開口部5擴開之狀態)下露出至外部。再者，圖5至多為模式性地表示平滑 區域35之圖，本發明(第1發明)之平滑區域並不限定於圖5所記載之態樣。 One of the main features of the diaper 1 of the present embodiment, which comprises the outer casing 3 including the elastic sheet 30 having the above-described configuration, is as follows: as shown in FIG. 5, in the side seal portion 4 The outer end surface 40 is formed with a smooth region 35 in which the outer end surface 40 is smooth, and the end portion 33a of the elastic wire 33 is present in the region 35. As shown in Fig. 3, the outer end surface 40 of the side seal portion 4 is located on both side portions of the diaper 1, and is continuous over the entire length of the side seal portion 4 (upward and downward in Fig. 1). The outer end surface 40 is exposed to the outside at least in a state in which the diaper 1 is worn (a state in which the waist opening portion 5 is expanded). Furthermore, Figure 5 is at least schematically representing smoothing. In the map of the region 35, the smooth region of the present invention (first invention) is not limited to the one described in FIG.

於本實施態樣中，平滑區域35形成於側封部4之外側端面40之整個區域，外側端面40整個區域為平滑之面。平滑區域35係藉由如下方式形成：利用源自外裝體3之形成材料之樹脂覆蓋原本應於外側端面40露出至外部之外裝體3(伸縮片材30、非伸縮片材36)之多根構成纖維的端部(未圖示)，因此雖然存在因該構成纖維之端部所產生之微細之凹凸而不平坦，但仍平滑，於以手指觸碰時不粗糙而具有光滑之觸感。 In the present embodiment, the smooth region 35 is formed over the entire area of the outer end surface 40 of the side seal portion 4, and the entire outer end surface 40 is a smooth surface. The smooth region 35 is formed by exposing the outer surface 40 to the outer outer casing 3 (the elastic sheet 30 and the non-stretch sheet 36) by the resin covering the material from which the outer casing 3 is formed. Since a plurality of ends (not shown) constituting the fibers are not flat due to the fine unevenness of the ends of the constituent fibers, they are smooth, and have a smooth touch when they are touched by fingers. sense.

形成平滑區域35之樹脂(覆蓋外裝體3之多根構成纖維之端部之樹脂)主要源自非伸縮片材36。於側封部4之形成步驟中，於對外裝體3中之側封部4之形成預定部位照射雷射光等而將該形成預定部位熔斷時，因該熱，使得非伸縮片材36中之存在於該形成預定部位之附近之部分成為該部分之熔點以上之溫度而熔融，該熔融樹脂因獲得流動性而成為覆蓋藉由熔斷而產生之外裝體3之切斷緣部之狀態，其後經冷卻而固化，藉此形成平滑區域35。即，伸長狀態之伸縮片材30藉由作為其構成纖維之彈性絲33(彈性纖維)被熔斷而成為解放狀態，收縮之力發揮作用，從而伸縮片材30之橫方向Y之長度變短。又，構成構成該伸縮片材30之外層片材31及內層片材32之纖維之端部、以及彈性絲33之端部於伸縮片材30之切斷緣部成為球狀。而且，藉由源自非伸縮片材36之熔融樹脂覆蓋構成該外層片材31及內層片材32之纖維、以及彈性絲33之球狀之端部，而形成平滑區域35。 The resin forming the smooth region 35 (the resin covering the ends of the plurality of fibers constituting the outer casing 3) is mainly derived from the non-elastic sheet 36. In the step of forming the side seal portion 4, when a predetermined portion of the side seal portion 4 in the outer casing 3 is irradiated with laser light or the like, and the predetermined portion is melted, the non-elastic sheet 36 is caused by the heat. The portion existing in the vicinity of the predetermined portion is melted at a temperature equal to or higher than the melting point of the portion, and the molten resin is covered with a cutting edge portion of the outer casing 3 by melting. It is then solidified by cooling, thereby forming a smooth region 35. In other words, the stretchable sheet member 30 in the stretched state is detached by the elastic yarn 33 (elastic fiber) constituting the fiber, and the contraction force acts, whereby the length of the stretch sheet 30 in the lateral direction Y is shortened. Further, the end portion of the fiber constituting the outer layer sheet 31 and the inner layer sheet 32 of the stretch sheet 30 and the end portion of the elastic yarn 33 are formed in a spherical shape at the cut edge portion of the stretch sheet 30. Further, the fibers constituting the outer layer sheet 31 and the inner layer sheet 32 and the spherical end portions of the elastic yarns 33 are covered with a molten resin derived from the non-stretch sheet 36 to form a smooth region 35.

如圖5所示，於平滑區域35，腹側部F側之外裝體3(伸縮片材30)中之彈性絲33之端部33a於該區域35(側封部4)之長度方向(縱方向X)上隔開特定間隔而配置有複數個，並且背側部R側之外裝體3(伸縮片材30)中之彈性絲33之端部33a於縱方向X上隔開特定間隔而配置有複數 個。各彈性絲33之端部33a於橫方向Y上位於與平滑區域35之表面(包圍彈性絲33之樹脂之表面)大致相同之位置，或存在於較該表面稍靠橫方向Y之內側(圖5之下方側)，從而實質上未較該表面更向橫方向Y之外側突出。即，於側封部4之外側端面40，各彈性絲33之端部33a存在於與其周邊部、即平滑區域35之外表面大致相同之位置，未較該周邊部更向外側突出。 As shown in Fig. 5, in the smooth region 35, the end portion 33a of the elastic yarn 33 in the outer casing 3 (the stretch sheet 30) on the side of the front side portion F is in the longitudinal direction of the region 35 (side seal portion 4) ( The longitudinal direction X) is disposed at a plurality of intervals, and the end portions 33a of the elastic wires 33 in the outer side body 3 (the elastic sheet 30) are spaced apart by a specific interval in the longitudinal direction X. And the configuration has multiple One. The end portion 33a of each of the elastic wires 33 is located at substantially the same position as the surface of the smooth region 35 (the surface of the resin surrounding the elastic yarn 33) in the lateral direction Y, or is located slightly inside the lateral direction Y of the surface (Fig. The lower side of 5) is substantially not protruded toward the outer side of the lateral direction Y from the surface. In other words, at the outer end surface 40 of the side seal portion 4, the end portion 33a of each of the elastic wires 33 is present at substantially the same position as the outer peripheral surface of the smooth portion 35, and does not protrude further outward than the peripheral portion.

若如上述般於側封部4之外側端面40形成平滑區域35，則外側端面40之觸感改善，例如即便尿布1之穿著者以手指觸碰到該外側端面40亦不會感到刺紮，而不易感到疼痛。又，於平滑區域35，存在穿著尿布1之過程中發揮收縮力之彈性絲33，因此於整個穿著過程中該收縮力不易降低，而可有效地防止穿著中尿布1偏移下落等不良情況。又，如上所述，平滑區域35係藉由利用源自該外裝體3之形成材料之樹脂覆蓋外裝體3之多根構成纖維之端部而形成，至少於平滑區域35(外側端面40)及其附近，藉由該樹脂而填埋多根該構成纖維間之間隙，因此藉由該樹脂之投錨效應，側封部4具有實用上充分之密封強度。 When the smooth region 35 is formed on the outer end surface 40 of the side seal portion 4 as described above, the touch feeling of the outer end surface 40 is improved, and for example, even if the wearer of the diaper 1 touches the outer end surface 40 with a finger, the tingling is not felt. It is not easy to feel pain. Further, in the smooth region 35, since the elastic yarn 33 exhibiting the contracting force during the wearing of the diaper 1 is present, the contraction force is not easily lowered during the entire wearing process, and the problem that the diaper 1 is prevented from falling off during wearing can be effectively prevented. Further, as described above, the smooth region 35 is formed by covering the end portions of the plurality of constituent fibers of the outer casing 3 with a resin derived from the material for forming the outer casing 3, at least in the smooth region 35 (outer end surface 40) In the vicinity of the resin, a plurality of gaps between the constituent fibers are filled by the resin. Therefore, the side seal portion 4 has a practically sufficient sealing strength by the anchoring effect of the resin.

上述尿布1例如可藉由以下所說明之製造方法進行製造。本實施態樣之褲型拋棄式尿布之製造方法包括如下步驟：使包含腹側部F之前身片連續體與包含背側部R之後身片連續體重疊而獲得尿布連續體，將該尿布連續體中之側封部4之形成預定部位熔斷而形成該側封部4。再者，以將尿布1於縱方向X分成兩部分之假想直線(未圖示)為基準，腹側部F側為尿布1之前身片，背側部R側為尿布1之後身片。上述前身片連續體係由複數個前身片於一方向(搬送方向)相連而形成，上述後身片連續體係由複數個後身片於一方向(搬送方向)相連而形成。 The diaper 1 can be manufactured, for example, by the manufacturing method described below. The manufacturing method of the pant-type disposable diaper according to the embodiment includes the steps of: superimposing the corpus continuous body including the ventral side F and the corpus continuous body including the back side portion R to obtain a diaper continuous body, and continuing the diaper The side seal portion 4 is formed by melting a predetermined portion of the side seal portion 4 in the body. Further, based on a virtual straight line (not shown) that divides the diaper 1 into two in the longitudinal direction X, the front side portion F is the front piece of the diaper 1, and the side of the back side portion R is the back piece of the diaper 1. The front piece continuous system is formed by connecting a plurality of front piece pieces in one direction (transport direction), and the rear body piece continuous system is formed by connecting a plurality of back body pieces in one direction (transport direction).

首先，如圖6所示，於自原片輥(未圖示)連續地供給之帶狀之外 裝體3(帶狀之伸縮片材30與帶狀之非伸縮片材36之積層體)(外裝體連續體)中之非伸縮片材36上，間歇地配置按照常規方法另外製造之吸收性本體2並固定。預先對吸收性本體2及/或非伸縮片材36塗佈熱熔接著劑等接著劑以進行熱熔，藉由該接著劑而將吸收性本體2固定於外裝體3(非伸縮片材36)。又，與該吸收性本體2之配置同時地，將複數根腰部彈性構件51以伸長至特定之伸長率之伸長狀態配置於帶狀之外裝體3之沿寬度方向之兩側部3a、3a上。於導入該腰部彈性構件51時，藉由接著劑塗佈機(未圖示)，於腰部彈性構件51連續或間歇地塗佈熱熔接著劑。 First, as shown in Fig. 6, the strip is continuously supplied from the original sheet roll (not shown). The non-elastic sheet 36 in the package 3 (the laminated body of the strip-shaped elastic sheet 30 and the belt-shaped non-stretch sheet 36) (the outer body continuous body) is intermittently disposed to be separately manufactured by a conventional method. The sex body 2 is fixed. An adhesive such as a hot melt adhesive is applied to the absorbent main body 2 and/or the non-stretch sheet 36 in advance to perform hot melt, and the absorbent body 2 is fixed to the outer casing 3 by the adhesive (non-stretch sheet) 36). Further, at the same time as the arrangement of the absorbent main body 2, the plurality of waist elastic members 51 are disposed in an extended state in which the elongation to a specific elongation is disposed on both side portions 3a, 3a of the belt-shaped outer casing 3 in the width direction. on. When the waist elastic member 51 is introduced, the hot-melt adhesive is applied to the waist elastic member 51 continuously or intermittently by an adhesive applicator (not shown).

繼而，如圖6所示，於配置有吸收性本體2及腰部彈性構件51之帶狀之外裝體3之特定部位形成腿部孔LH。該腿部孔形成步驟可使用旋轉切割器、雷射切割器等與先前以來此種物品之製造方法中之手法相同之手法而實施。再者，腿部孔之形成亦可並非如本實施態樣般於配置吸收性本體2後實施，而於配置前實施。 Then, as shown in FIG. 6, the leg hole LH is formed in the specific part of the tape-shaped exterior body 3 in which the absorptive main body 2 and the waist elastic member 51 are arrange|positioned. The leg hole forming step can be carried out using a rotary cutter, a laser cutter or the like in the same manner as in the prior art method of manufacturing such an article. Further, the formation of the leg holes may not be performed after the absorbent body 2 is disposed as in the present embodiment, but may be performed before the arrangement.

繼而，將帶狀之外裝體3以使其腹側部F側與背側部R側重疊之方式於寬度方向(與帶狀之外裝體3之長度方向正交之方向)摺疊。更具體而言，如圖6所示，將帶狀之外裝體3之沿長度方向(搬送方向MD)之兩側部3a、3a以覆蓋腰部彈性構件51之方式回折而將該彈性構件51固定之後，將該外裝體3與吸收性本體2一併於其寬度方向CD對折。即，使包含腹側部F之前身片連續體與包含背側部R之後身片連續體重疊。帶狀之外裝體3之長度方向(搬送方向MD，Machine Direction(加工方向))係與尿布1之橫方向Y一致，且帶狀之外裝體3之寬度方向CD(Cross machine Direction，橫方向加工方向)係與尿布1之縱方向X一致。如此，可獲得複數個尿布1之前身(未形成一對側封部4、4之褲型拋棄式尿布)於一方向(橫方向Y)相連而成之尿布連續體10。 Then, the tape-shaped exterior body 3 is folded in the width direction (direction orthogonal to the longitudinal direction of the tape-shaped exterior body 3) so that the front side portion F side and the back side portion R side overlap each other. More specifically, as shown in FIG. 6, the both side portions 3a, 3a of the belt-shaped outer casing 3 in the longitudinal direction (transport direction MD) are folded back so as to cover the waist elastic member 51, and the elastic member 51 is folded back. After the fixing, the outer casing 3 and the absorbent body 2 are folded in half in the width direction CD. That is, the body continuous body including the front side portion F is overlapped with the body piece continuous body including the back side portion R. The longitudinal direction of the belt-shaped outer casing 3 (the conveying direction MD, the Machine Direction) coincides with the transverse direction Y of the diaper 1, and the width direction of the belt-shaped outer casing 3 is CD (Cross machine Direction, horizontal The direction of the direction of processing is the same as the longitudinal direction X of the diaper 1. In this manner, the diaper continuous body 10 in which a plurality of diapers 1 (the pants-type disposable diapers having no pair of side seal portions 4 and 4 are formed) are connected in one direction (lateral direction Y) can be obtained.

繼而，將尿布連續體10中之側封部形成預定部位4'熔斷，而形成側封部4。作為熔斷手段，只要為能夠使部位4'(伸縮片材30)之形成材料(纖維等)熔融而將其切斷之手段，則並無特別限制，例如可列舉雷射光、經加熱之切斷刀、使用過加熱之公知之熱封機構之熱封、使用過振動之公知之超音波密封機構之超音波密封等。於該等熔斷手段中，尤其是雷射光可使側封部4之寬度4W(參照圖3)相對較小，且對於使側封部4不易自外部顯眼較為有效，故而較佳。 Then, the side seal portion forming portion 4' in the diaper continuous body 10 is melted to form the side seal portion 4. The means for breaking the material (fiber or the like) of the portion 4' (the elastic sheet 30) and melting it is not particularly limited, and examples thereof include laser light and heated cutting. Knife, heat sealing of a known heat sealing mechanism using heating, ultrasonic sealing of a known ultrasonic sealing mechanism using vibration. Among these fuse means, in particular, the laser light can make the width 4W (see FIG. 3) of the side seal portion 4 relatively small, and it is preferable that the side seal portion 4 is less likely to be conspicuous from the outside.

關於側封部形成預定部位4'，腰部開口部5(參照圖1)之開口端部及其附近成為重疊有12片片材之12層構造部分，除此以外之部分成為重疊有6片片材之6層構造部分。如圖3及圖5所示，6層構造部分係包含構成腹側部F中之1片外裝體3(伸縮片材30與非伸縮片材36之積層體)之3片片材(伸縮片材30中之外層片材31及內層片材32以及非伸縮片材36)、以及構成背側部R中之1片外裝體3之同樣之3片片材31、32、36，由該等6片片材積層而構成。另一方面，關於12層構造部分，由於如上所述在製造尿布連續體10時將帶狀之外裝體3之兩側部3a、3a以覆蓋腰部彈性構件51之方式回折(參照圖6)，故而於腹側部F及背側部R分別存在2片外裝體3且積層有該等共4片外裝體3、3，因此，結果由12片片材31、32、36積層而構成。 The side seal portion forming predetermined portion 4', the opening end portion of the waist opening portion 5 (see Fig. 1) and the vicinity thereof are 12-layer structural portions in which 12 sheets are superposed, and the other portions are overlapped with 6 sheets. 6-layer structural part of the material. As shown in FIG. 3 and FIG. 5, the six-layer structure portion includes three sheets (one piece of the outer covering body 3 (the laminated body of the elastic sheet 30 and the non-stretch sheet 36) constituting the front side portion F (stretching) The outer sheet 31 and the inner sheet 32 and the non-stretch sheet 36) of the sheet 30, and the same three sheets 31, 32, 36 constituting one of the back side portions R, The six sheets are laminated to each other. On the other hand, regarding the 12-layer structure portion, the both side portions 3a, 3a of the belt-shaped outer casing 3 are folded back so as to cover the waist elastic member 51 when the diaper continuous body 10 is manufactured as described above (refer to Fig. 6). Therefore, since two outer covering bodies 3 are present in the front side portion F and the back side portion R, and the four outer covering bodies 3 and 3 are laminated, the result is that the twelve sheets 31, 32, and 36 are laminated. Composition.

於使用例如雷射光作為熔斷手段之情形時，若對6層構造之側封部形成預定部位4'照射雷射光，則存在於部位4'之片材31、32、36之形成材料(彈性絲33、非彈性纖維等)因由雷射光之直射所產生之發熱而氣化並自尿布連續體部分消失，又，存在於部位4'之附近之形成材料係藉由雷射光而間接地被加熱並熔融。其結果，將部位4'熔斷，以自尿布連續體10將1個單片之尿布前身切開之形式，將帶狀之尿布連續體10分割，與此同時，藉由該分割而產生之單片之尿布前身中之6片片材31、32、36之切斷緣部彼此、及切開之尿布連續體10中之6片 片材31、32、36之切斷緣部彼此分別熔接。片材31、32、36之切斷緣部係於雷射光之照射中及照射剛結束之後發熱而成為熔融狀態，但自照射結束後，容易被與尿布連續體10及單片之尿布前身接觸之熔斷裝置構成構件(未圖示)冷卻，且因向外部氣體或該裝置構成構件之傳熱而迅速地冷卻並固化，成為該切斷緣部之形成材料熔融一體化而得之熔接部。於對12層構造之側封部形成預定部位4'照射雷射光之情形時，亦同樣地於部位4'形成熔接部。藉由如此形成熔接部，形成1個尿布1中之一對側封部4、4中之一者。之後，藉由重複相同之操作，而連續地製造包含包括一對側封部4、4之外裝體3(伸縮片材30與非伸縮片材36之積層體)之褲型拋棄式尿布1。 In the case where, for example, laser light is used as the fuse means, if the side seal portion forming the predetermined portion 4' of the six-layer structure is irradiated with the laser light, the forming material of the sheets 31, 32, 36 existing in the portion 4' (elastic yarn) 33, inelastic fibers, etc.) vaporized by the heat generated by the direct radiation of the laser light and partially disappeared from the diaper continuum, and the forming material existing in the vicinity of the portion 4' is indirectly heated by the laser light and Melt. As a result, the portion 4' is melted, and the strip-shaped diaper continuous body 10 is divided into a form in which the diaper precursor is cut from the diaper continuous body 10, and at the same time, the single piece produced by the division is produced. The cut edges of the six sheets 31, 32, 36 of the diaper front body, and the six of the cut diaper continuums 10 The cut edges of the sheets 31, 32, and 36 are welded to each other. The cut edges of the sheets 31, 32, and 36 are in a molten state during the irradiation of the laser light and immediately after the irradiation, but are easily contacted with the diaper continuous body 10 and the single diaper precursor before the irradiation is completed. The fuse device constituting member (not shown) is cooled, and is rapidly cooled and solidified by heat transfer to the outside air or the device constituent member, and is a welded portion obtained by melting and integrating the forming material of the cut edge portion. When the predetermined portion 4' is irradiated with the laser beam in the side seal portion of the 12-layer structure, the welded portion is similarly formed in the portion 4'. One of the pair of side seal portions 4, 4 of one diaper 1 is formed by forming the welded portion in this manner. Thereafter, the pant type disposable diaper 1 including the pair of side seal portions 4, 4 outer casing 3 (the laminate of the stretch sheet 30 and the non-retractable sheet 36) is continuously manufactured by repeating the same operation. .

於上述尿布連續體10之熔斷中，特別重要的是將尿布連續體10、尤其是其熔斷預定部分(側封部形成預定部位4')之周邊部於朝厚度方向加壓(壓縮)之狀態下熔斷(例如照射雷射光)。藉由將加壓狀態之尿布連續體10熔斷，藉由該熔斷而產生之複數片片材31、32、36之切斷緣部彼此更進一步確實地熔接，結果，側封部4之熔接強度提高。就提高側封部4之熔接強度之觀點而言，尿布連續體10之加壓(壓縮)較佳為不僅於熔斷中(例如雷射光之照射中)進行，亦於該熔斷之前後進行。尿布連續體10之加壓方法並無特別限制，例如可列舉如下方法等：將尿布連續體10以特定之張力捲繞於圓筒狀、平板狀等特定形狀之支持構件，於維持該張力之狀態下在該支持構件上進行熔斷；或利用該支持構件與其他構件(擠壓構件)夾持尿布連續體10。 In the fusing of the diaper continuous body 10, it is particularly important to pressurize (compress) the diaper continuous body 10, particularly the peripheral portion of the predetermined portion (the side seal portion forming predetermined portion 4') in the thickness direction. Blow down (for example, illuminating laser light). By squeezing the diaper continuous body 10 in a pressurized state, the cut edge portions of the plurality of sheets 31, 32, and 36 which are generated by the fusion are more reliably welded to each other, and as a result, the fusion strength of the side seal portion 4 is obtained. improve. From the viewpoint of improving the welding strength of the side seal portion 4, the pressurization (compression) of the diaper continuous body 10 is preferably performed not only in the fusing (for example, in the irradiation of laser light) but also before and after the fusing. The method of pressurizing the diaper continuous body 10 is not particularly limited, and examples thereof include a method in which the diaper continuous body 10 is wound around a support member having a specific shape such as a cylindrical shape or a flat shape under a specific tension to maintain the tension. The support member is blown in a state; or the diaper continuous body 10 is held by the support member and other members (squeeze members).

再者，於上述尿布連續體10之熔斷中，不管尿布連續體10(外裝體3)是否為伸長狀態。即，關於側封部4，i)可為經過如下步驟而形成者：將使包含腹側部F之前身片連續體(帶狀之伸縮片材30與帶狀之非伸縮片材36之積層體)與包含背側部R之後身片連續體重疊而獲得之尿布連續體10於沿該尿布連續體10中之伸縮片材30之伸縮方向(搬送方 向MD、彈性絲33延伸之方向、尿布1之橫方向Y)伸長之狀態下熔斷(例如照射雷射光)；或ii)亦可為經過如下步驟而形成者：未使尿布連續體10伸長而於非伸長狀態(自然狀態)下進行熔斷。 Further, in the rupture of the diaper continuous body 10, whether or not the diaper continuous body 10 (outer body 3) is in an extended state is used. That is, the side seal portion 4, i) may be formed by a process in which the body sheet continuous body including the front side portion F (the belt-like stretch sheet 30 and the belt-shaped non-retractable sheet member 36 are laminated) The diaper continuous body 10 obtained by overlapping the body continuous body after the back side portion R is stretched in the direction of expansion and contraction of the stretch sheet 30 in the diaper continuous body 10 (transport side) The MD, the direction in which the elastic yarn 33 extends, the transverse direction Y) of the diaper 1 are blown (for example, irradiated with laser light); or ii) may be formed by the following steps: the diaper continuous body 10 is not elongated The fuse is blown in a non-elongated state (natural state).

關於上述i)之「將外裝體於伸長狀態下熔斷」，於假設外裝體3不包含非伸縮片材36而僅由伸縮片材30構成之情形時，如以下所說明般，於側封部4之外側端面40，伸縮片材30中之外層片材31及內層片材32之構成纖維(非彈性纖維)之端部形成為球狀並存在多個，藉由該等多個球狀之纖維端部彼此之接合而形成外側端面40及其附近。由於此種球狀物彼此之接合會於鄰接之球狀物間產生空隙，故而擔心側封部4之密封強度降低。對此，若如本實施態樣般外裝體3包含非伸縮片材36，則即便於側封部4之形成過程中纖維端部成為球狀，來自非伸縮片材36之熔融樹脂亦會覆蓋該球狀之纖維端部，球狀物間之空隙被該熔融樹脂填埋，故而不易發生密封強度之降低。 In the case of the above-mentioned i), "when the outer casing is blown in an extended state", when the outer casing 3 does not include the non-elastic sheet 36 and is composed only of the stretch sheet 30, as described below, the side is The outer end surface 40 of the sealing portion 4, the end portions of the constituent fibers (non-elastic fibers) of the outer layer sheet 31 and the inner layer sheet 32 in the stretch sheet 30 are formed in a spherical shape and exist in plurality, by the plurality of The ends of the spherical fibers are joined to each other to form the outer end face 40 and its vicinity. Since the joining of the balls to each other causes a gap between the adjacent balls, there is concern that the sealing strength of the side seal portions 4 is lowered. On the other hand, if the outer casing 3 includes the non-stretch sheet 36 as in the present embodiment, even if the fiber ends become spherical during the formation of the side seal portion 4, the molten resin from the non-stretch sheet 36 will also be Covering the ends of the spherical fibers, the gap between the balls is filled with the molten resin, so that the sealing strength is less likely to occur.

例如於對伸長狀態之外裝體3中之側封部形成預定部位4'照射雷射光而將其熔斷之情形時，於該熔斷剛結束之後，藉由熔斷而產生之伸縮片材30中之片材31、32之切斷緣部中的該片材31、32之多根構成纖維(非彈性纖維)之端部分別為樹脂成分熔融之熔融狀態，該熔融樹脂係因表面張力而成為球狀。又，於熔斷後，片材31、32被自伸長狀態釋放而恢復成非伸長狀態(自然狀態)，故而對該片材31、32之多根非彈性纖維各者之球狀之端部，除施加表面張力以外亦施加恢復成該非伸長狀態之力，藉此，熔融樹脂於該端部集合，成為更大之球狀。此處，若大量熔融樹脂集合於多根非彈性纖維各者之球狀之端部，則該等球狀之端部一體化而成為不定形狀之樹脂之塊(樹脂塊)，但因分佈於片材31、32之切斷緣部之多根彈性絲33之伸長力之作用，於各非彈性纖維之端部未集合有供其等一體化之程度之大量之熔融樹脂，故而於該非彈性纖維自伸長狀態恢復成非伸長狀態之過程中，於使其端 部維持球狀之狀態下熔融樹脂固化，結果，非彈性纖維之端部成為球狀。 For example, when the side portion forming portion 4' in the assembled body 3 is irradiated with laser light and is blown, in the case of the stretched state, the stretched sheet 30 is formed by the fuse immediately after the end of the melting. The end portions of the plurality of constituent fibers (non-elastic fibers) of the sheets 31 and 32 in the cut edge portions of the sheets 31 and 32 are in a molten state in which the resin component is melted, and the molten resin is a ball due to surface tension. shape. Further, after the fusing, the sheets 31 and 32 are released from the stretched state and returned to the non-stretched state (natural state), so that the spherical end portions of the plurality of inelastic fibers of the sheets 31 and 32 are In addition to the application of the surface tension, a force which is restored to the non-stretched state is applied, whereby the molten resin is collected at the end portion to become a larger spherical shape. Here, when a large amount of molten resin is collected in the spherical end portion of each of the plurality of non-elastic fibers, the spherical end portions are integrated to form a block (resin block) of resin having an indefinite shape, but The stretching force of the plurality of elastic wires 33 at the cut edge portions of the sheets 31 and 32 does not have a large amount of molten resin to the extent that they are integrated at the end portions of the respective inelastic fibers, so that the inelastic In the process of returning the fiber from its extended state to its non-extended state, at its end When the portion is maintained in a spherical shape, the molten resin is solidified, and as a result, the end portion of the inelastic fiber is spherical.

另一方面，於上述ii)之「將外裝體於非伸長狀態下熔斷」之情形時，原本便如以下所說明般，上述外裝體3之構成纖維之端部未成為球狀，故而未發生側封部4之密封強度之降低。即，若未使尿布連續體10(外裝體3)伸長而於非伸長狀態(自然狀態)下將其熔斷，則藉由熔斷而產生之多根構成纖維(非彈性纖維)之端部分別藉由熔融樹脂之表面張力而暫時成為球狀，但由於尿布連續體10成為非伸長狀態而彈性絲33之伸長力未發揮作用，因此大量熔融樹脂集合於該等複數個球狀之端部，其結果，該等端部一體化而成為不定形狀之樹脂塊，於該塊狀態下熔融樹脂直接固化而形成側封部4。 On the other hand, in the case of "the outer body is melted in the non-stretched state" in the above ii), as described below, the end portions of the constituent fibers of the outer casing 3 are not spherical, and thus The reduction in the sealing strength of the side seal portion 4 did not occur. In other words, if the diaper continuous body 10 (outer body 3) is not stretched and is melted in a non-stretched state (natural state), the ends of the plurality of constituent fibers (inelastic fibers) which are generated by the melting are respectively The surface of the molten resin is temporarily spherical, but the diaper continuous body 10 is in a non-stretched state, and the elongation force of the elastic yarn 33 does not function. Therefore, a large amount of molten resin is collected at the ends of the plurality of spherical shapes. As a result, the end portions are integrated into a resin block having an indefinite shape, and the molten resin is directly solidified in the block state to form the side seal portion 4.

但，於上述ii)之情形時，存在於如此形成之側封部4之外側端面40之樹脂塊之體積小於熔融前之樹脂之表觀體積(apparent volume)，因此彈性絲33之端部容易自外側端面40突出至尿布外側，因此，有側封部4之肌膚觸感變得刺痛之虞。但是，若如本實施態樣般外裝體3包含非伸縮片材36，則來自非伸縮片材36之熔融樹脂將彈性絲33之端部或其周邊部覆蓋，故而得以有效地防止此種觸感之降低。 However, in the case of the above ii), the volume of the resin block existing on the outer end surface 40 of the side seal portion 4 thus formed is smaller than the apparent volume of the resin before melting, and therefore the end portion of the elastic yarn 33 is easy. Since the outer end surface 40 protrudes to the outside of the diaper, the skin feel of the side seal portion 4 becomes stinging. However, if the outer casing 3 includes the non-stretch sheet 36 as in the present embodiment, the molten resin from the non-stretch sheet 36 covers the end portion of the elastic yarn 33 or the peripheral portion thereof, thereby effectively preventing such Reduced touch.

如此，於本實施態樣中，於側封部4之形成過程中，如上述i)般，即便纖維端部成為球狀，來自非伸縮片材36之熔融樹脂亦會覆蓋該球狀之纖維端部，球狀物間之空隙被該熔融樹脂填埋，或如上述ii)般，於複數個球狀之端部集合有大量熔融樹脂，該等端部一體化而成為不定形狀之樹脂塊，故而於側封部4中腹側部F與背側部R牢固地接合，藉此，對側封部4賦予實用上充分之密封強度(剝離強度)。因此，於穿著尿布1時不易發生側封部4破裂之不良情況。側封部之剝離強度係以如下方式測定。 As described above, in the present embodiment, in the formation of the side seal portion 4, as in the above i), even if the fiber end portion is spherical, the molten resin from the non-elastic sheet 36 covers the spherical fiber. At the end, the gap between the balls is filled with the molten resin, or a large amount of molten resin is collected at the ends of the plurality of balls as in the above ii), and the ends are integrated to form a resin block of an indefinite shape. Therefore, the front side portion F and the back side portion R are firmly joined to each other in the side seal portion 4, whereby the side seal portion 4 is provided with a practically sufficient sealing strength (peeling strength). Therefore, when the diaper 1 is worn, the problem that the side seal portion 4 is broken is less likely to occur. The peel strength of the side seal portion was measured in the following manner.

[側封部之剝離強度之測定方法] [Method for Measuring Peel Strength of Side Seals]

剝離強度係使用ORIENTEC公司製造之TENSILON RTC-1150A而測定。使用將側封部以長度成為30mm之方式切割而成之樣品，將該樣品於中央層之部分打開，夾於裝置之後，以300mm/min之速度將其剝離。將此時之最大點荷重之值設為側封部之剝離強度。於樣品尺寸未達到30mm之情形時，以可採取之最大長度x(mm)進行切割，以相同之方法測定剝離強度。利用公式「a×(30/x)」將所獲得之剝離強度a進行換算，設為30mm剝離強度。 The peel strength was measured using TENSILON RTC-1150A manufactured by ORIENTEC. A sample obtained by cutting the side seal portion to a length of 30 mm was used, and the sample was opened in a portion of the center layer, and after being sandwiched between the devices, it was peeled off at a speed of 300 mm/min. The value of the maximum point load at this time is taken as the peeling strength of the side seal portion. When the sample size is less than 30 mm, the maximum length x (mm) that can be taken is cut, and the peel strength is measured in the same manner. The obtained peel strength a was converted by the formula "a × (30 / x)" to obtain a peel strength of 30 mm.

如此，就實用上充分之密封強度(剝離強度)及操作性之觀點而言，側封部4之剝離強度分別較佳為10N以上，進而較佳為13N以上，而且，較佳為75N以下，進而較佳為70N以下，更具體而言，較佳為10N~75N，進而較佳為13N~70N。 As described above, the peel strength of the side seal portion 4 is preferably 10 N or more, more preferably 13 N or more, and preferably 75 N or less, from the viewpoint of practically sufficient sealing strength (peeling strength) and workability. Further, it is preferably 70 N or less, and more specifically, preferably 10 N to 75 N, and more preferably 13 N to 70 N.

以下，關於伸縮片材30之製造方法，基於其較佳之實施態樣一面參照圖7一面進行說明。於本實施態樣中，如圖7所示，一面將自紡絲噴嘴61紡出之熔融狀態之多根彈性絲33以特定速度捲取並使其延伸，一面於該彈性絲33固化前，以該彈性絲33未相互交叉地於一方向排列之方式使該彈性絲33熔接於外層片材31及內層片材32，接下來，使熔接有該彈性絲33之片材31、32沿該彈性絲33延伸之方向延伸而對該片材31、32賦予伸長性。 Hereinafter, a method of manufacturing the stretch sheet 30 will be described with reference to FIG. 7 based on a preferred embodiment. In the present embodiment, as shown in FIG. 7, a plurality of elastic yarns 33 in a molten state spun from the spinning nozzle 61 are taken up at a specific speed and extended, and before the elastic yarn 33 is solidified, The elastic yarns 33 are welded to the outer layer sheet 31 and the inner layer sheet 32 in such a manner that the elastic yarns 33 are not aligned with each other in one direction, and then the sheets 31, 32 to which the elastic yarns 33 are welded are edged. The elastic yarn 33 extends in the direction in which it extends to impart elongation to the sheets 31 and 32.

如圖7所示，紡絲噴嘴61設置於紡絲頭62。紡絲頭62連接於擠出機。亦可經由齒輪泵對紡絲頭62供給樹脂。藉由該擠出機而熔融混練之彈性樹脂被供給至紡絲頭62。於紡絲頭62，多個紡絲噴嘴61呈直線狀配置成一行。紡絲噴嘴61係沿片材31、32之寬度方向配置。相鄰之紡絲噴嘴61之間隔相當於目標之伸縮片材30中之彈性絲33之間隔。紡絲噴嘴61通常為圓形，且包括圓筒形狀之噴嘴孔。 As shown in FIG. 7, the spinning nozzle 61 is provided to the spinning head 62. Spinning head 62 is attached to the extruder. The spinneret 62 can also be supplied with resin via a gear pump. The elastic resin melt-kneaded by the extruder is supplied to the spinning head 62. In the spinning head 62, a plurality of spinning nozzles 61 are arranged in a line in a straight line. The spinning nozzle 61 is disposed along the width direction of the sheets 31 and 32. The interval between the adjacent spinning nozzles 61 corresponds to the interval of the elastic wires 33 in the target stretch sheet 30. The spinning nozzle 61 is generally circular and includes a cylindrical nozzle hole.

經紡出之熔融狀態之彈性絲33係與分別自原片以相同速度送出之片材31、32合流，夾持於兩片材31、32間並被以特定速度捲取。彈 性絲33之捲取速度與兩片材31、32之送出速度一致。彈性絲33之捲取速度影響到該彈性絲33之直徑及延伸倍率。藉由延伸而於彈性絲33產生之張力係防止於使該彈性絲33與片材31、32貼合時因風或靜電所引起之該彈性絲33之混亂。藉此，可使彈性絲彼此未交叉地朝一方向排列。 The spun-elastic elastic yarn 33 is joined to the sheets 31 and 32 which are respectively fed from the original sheet at the same speed, and is sandwiched between the two sheets 31 and 32 and taken up at a specific speed. bomb The take-up speed of the filaments 33 coincides with the feed speed of the two sheets 31, 32. The take-up speed of the elastic yarn 33 affects the diameter and the stretch ratio of the elastic yarn 33. The tension generated by the elastic yarn 33 is prevented from being disturbed by the wind or static electricity when the elastic yarn 33 is attached to the sheets 31 and 32. Thereby, the elastic yarns can be aligned in one direction without crossing each other.

彈性絲33係於其固化前，即於可熔接之狀態下與片材31、32合流。其結果，彈性絲33係於由片材31、32夾持之狀態下，熔接於該等片材31、32。即，藉由使固化前之彈性絲33熔接於經搬送之片材31、32，彈性絲33被捲取並延伸。於彈性絲33熔接時，未自外部對片材31、32賦予熱。即，該彈性絲33與兩片材31、32僅藉由因可熔接之彈性絲33所產生之熔融熱而熔接。其結果，僅兩片材31、32之構成纖維中之存在於彈性絲33之周圍之纖維與該彈性絲33熔接，存在於較其更遠之位置之纖維未熔接。其結果，對兩片材31、32施加之熱限於最小限，故而得以維持該不織布自身原本所具有之良好之質感。藉此，所獲得之伸縮片材30之質感變得良好。 The elastic yarn 33 is joined to the sheets 31, 32 before being solidified, that is, in a state in which it can be welded. As a result, the elastic yarns 33 are welded to the sheets 31 and 32 in a state of being sandwiched by the sheets 31 and 32. That is, the elastic yarn 33 is wound up and extended by fusing the elastic yarn 33 before curing to the conveyed sheets 31 and 32. When the elastic yarns 33 are welded, heat is not applied to the sheets 31 and 32 from the outside. That is, the elastic yarn 33 and the two sheets 31, 32 are welded only by the heat of fusion generated by the weldable elastic yarn 33. As a result, only the fibers existing around the elastic yarn 33 among the constituent fibers of the two sheets 31 and 32 are welded to the elastic yarn 33, and the fibers existing at positions farther away are not welded. As a result, the heat applied to the two sheets 31, 32 is limited to a minimum, so that the texture which the nonwoven fabric itself originally has is maintained. Thereby, the texture of the obtained stretch sheet 30 becomes good.

於經紡出之彈性絲33與片材31、32合流為止之期間，該彈性絲33延伸且分子於延伸方向配向。又，直徑變小。就使彈性絲33充分地延伸之觀點及防止彈性絲33斷頭之觀點而言，亦可對經紡出之彈性絲33吹送特定溫度之風(熱風、冷風)，而調整該彈性絲33之溫度。 During the period in which the spun elastic yarn 33 merges with the sheets 31 and 32, the elastic yarn 33 extends and the molecules are aligned in the extending direction. Also, the diameter becomes smaller. From the viewpoint of sufficiently extending the elastic yarn 33 and preventing the breakage of the elastic yarn 33, the spinning elastic yarn 33 may be blown with a wind of a specific temperature (hot air, cold air), and the elastic yarn 33 may be adjusted. temperature.

彈性絲33之延伸不僅為構成該彈性絲33之樹脂組合物(彈性樹脂)之熔融狀態下之延伸(熔融延伸)，亦可為其冷卻過程中之軟化狀態之延伸(軟化延伸)。此處所提及之所謂熔融狀態係指於施加外力時樹脂流動之狀態。樹脂之熔融溫度係設為利用黏彈性測定所獲得(例如對夾於圓形平行平板間之樹脂施加旋轉方向之振動應變而進行測定)之Tan δ之峰溫度而測定。為了於樹脂組合物延伸時不產生斷頭，較佳為確保延伸區間較長。就該觀點而言，樹脂組合物之熔融溫度較佳為 130~300℃。又，就樹脂組合物之耐熱性(成形溫度)之觀點而言，熔融溫度較佳為130~220℃。軟化溫度係設為形成為片材狀之樹脂組合物之測定試樣之黏彈性特性中之儲存模數(storage modulus)G'之反曲點(inflection point)之溫度而進行測定。將自軟化溫度至熔融溫度為止之範圍稱為軟化狀態。就伸縮片材30之保存時之樹脂組合物之結晶之成長、或因體溫而導致之伸縮片材30之伸縮特性降低之觀點而言，軟化溫度較佳為60℃以上，更佳為80℃~180℃。 The extension of the elastic yarn 33 is not only an extension (melt extension) in a molten state of the resin composition (elastic resin) constituting the elastic yarn 33, but also an extension (softening extension) of a softened state during cooling. The so-called molten state referred to herein means a state in which the resin flows when an external force is applied. The melting temperature of the resin is measured by the peak temperature of Tan δ obtained by measurement of viscoelasticity (for example, by measuring the vibration strain in the direction of rotation of the resin sandwiched between the circular parallel plates). In order to prevent breakage of the resin composition when it is extended, it is preferable to ensure a long extension period. From this point of view, the melting temperature of the resin composition is preferably 130~300 °C. Further, the melting temperature is preferably from 130 to 220 ° C from the viewpoint of heat resistance (forming temperature) of the resin composition. The softening temperature is measured by the temperature of the inflection point of the storage modulus G' in the viscoelastic property of the measurement sample formed into the sheet-like resin composition. The range from the softening temperature to the melting temperature is referred to as a softened state. The softening temperature is preferably 60° C. or higher, and more preferably 80° C. from the viewpoint of the growth of the crystal of the resin composition during storage of the stretch sheet 30 or the deterioration of the stretch characteristics of the stretch sheet 30 due to the body temperature. ~180 °C.

為了使纖維熔接確實，使彈性絲33與片材31、32接合時之彈性絲33之溫度較佳為100℃以上。又，就保持彈性絲33之形狀並獲得伸縮特性良好之伸縮片材30之觀點而言，彈性絲之溫度較佳為180℃以下。更佳為120~160℃之範圍。接合時之溫度可藉由如下方式測定，即：使用包含具有與構成彈性絲33之樹脂組合物之熔點不同之熔點的改性聚乙烯或改性聚丙烯等之膜作為與彈性絲33接合之層壓基材，並觀察其接合狀態。此時，若彈性絲33與層壓基材熔接，則接合溫度為層壓基材之熔點以上。 In order to fuse the fibers, the temperature of the elastic yarns 33 when the elastic yarns 33 are joined to the sheets 31 and 32 is preferably 100 ° C or higher. Further, from the viewpoint of maintaining the shape of the elastic yarn 33 and obtaining the stretchable sheet 30 having excellent stretch characteristics, the temperature of the elastic yarn is preferably 180 ° C or lower. More preferably in the range of 120 to 160 ° C. The temperature at the time of joining can be measured by bonding a film comprising a modified polyethylene or a modified polypropylene having a melting point different from the melting point of the resin composition constituting the elastic yarn 33 as the elastic yarn 33. The substrate was laminated and its joined state was observed. At this time, when the elastic yarn 33 is welded to the laminated base material, the joining temperature is equal to or higher than the melting point of the laminated base material.

於彈性絲33與片材31、32接合時，彈性絲33實質上為非伸長狀態(於卸除外力時未收縮之狀態)。於兩者之接合狀態中，更佳為構成片材31、32之纖維(非彈性纖維)之至少一部分熔接於彈性絲33，或進而彈性絲33與構成片材31、32之纖維之至少一部分之兩者熔接。其原因在於可獲得充分之接合強度。所獲得之伸縮片材30之伸縮特性受到彈性絲33與片材31、32之接合點之密度之影響。又，伸縮特性可藉由接合溫度、接合壓力、因下述片材31、32之延伸所引起之接合點之偏移而進行調整。藉由使片材31、32之構成纖維熔接於彈性絲33，每一個接合點之接合強度均變高。若使接合點之密度變低，則由片材31、32所引起之伸縮阻礙變少，且可獲得具有充分之接合強度之伸縮片材30，故而較佳。 When the elastic yarn 33 is joined to the sheets 31 and 32, the elastic yarn 33 is substantially in a non-stretched state (a state in which it is not shrunk when the force is removed). In the joined state of the two, it is more preferable that at least a part of the fibers (inelastic fibers) constituting the sheets 31, 32 are welded to the elastic yarn 33, or further, at least a part of the elastic yarn 33 and the fibers constituting the sheets 31, 32. The two are welded. The reason for this is that sufficient joint strength can be obtained. The stretch characteristics of the obtained stretch sheet 30 are affected by the density of the joint of the elastic yarn 33 and the sheets 31, 32. Further, the stretch characteristics can be adjusted by the joint temperature, the joint pressure, and the offset of the joint caused by the extension of the sheets 31 and 32 described below. By welding the constituent fibers of the sheets 31 and 32 to the elastic yarn 33, the joint strength of each joint becomes high. When the density of the joint is lowered, the stretch deformation due to the sheets 31 and 32 is reduced, and the stretch sheet 30 having sufficient joint strength can be obtained, which is preferable.

於使彈性絲33與片材31、32合流時，使各彈性絲33不相互交叉地沿一方向排列。而且，於使彈性絲33與片材31、32合流並使該彈性絲33夾持於兩片材31、32間之狀態下，藉由一對夾輥63、63夾壓該等三者。夾壓之條件影響到所獲得之伸縮片材30之質感。若夾壓力過大，則彈性絲33容易陷入兩片材31、32內，由此導致所獲得之伸縮片材30之質感容易降低。就該觀點而言，夾輥63、63之夾壓力係彈性絲33與兩片材31、32接觸之程度便足夠，無需過高之夾壓力。 When the elastic yarn 33 and the sheets 31 and 32 are joined together, the elastic yarns 33 are arranged in one direction without crossing each other. Further, when the elastic yarn 33 and the sheets 31 and 32 are joined together and the elastic yarn 33 is sandwiched between the two sheets 31 and 32, the three are sandwiched by the pair of nip rollers 63 and 63. The conditions of the pinching affect the texture of the obtained stretch sheet 30. If the nip pressure is too large, the elastic yarn 33 is easily caught in the two sheets 31, 32, whereby the texture of the obtained stretch sheet 30 is easily lowered. From this point of view, the nip pressure of the nip rollers 63, 63 is sufficient to contact the two sheets 31, 32 to each other, and an excessively high nip pressure is not required.

作為利用夾輥63之夾壓之其他條件，可列舉夾輥63之溫度。本發明者等人之研究之結果表明，相比於已將夾輥63加熱之狀態下進行夾壓，未加熱(即順其自然)或一面冷卻一面進行夾壓者可獲得質感良好之伸縮片材30。於將夾輥63冷卻之情形時，較佳為使用冷卻水等冷媒，以夾輥63之表面設定溫度成為10~50℃之方式進行溫度調節。 The other conditions of the nip by the nip roller 63 include the temperature of the nip roller 63. As a result of the study by the inventors of the present invention, it has been found that a stretched sheet having good texture can be obtained without being heated (i.e., naturally) or while being cooled while being heated in a state where the nip roller 63 has been heated. Material 30. In the case where the nip roller 63 is cooled, it is preferable to use a refrigerant such as cooling water to adjust the temperature so that the surface setting temperature of the nip roller 63 becomes 10 to 50 °C.

以此方式可獲得於2片片材31、32間夾持有彈性絲33之複合體30'。於使用原本具有伸長性之片材作為片材31、32之情形時，該複合體30'成為伸縮片材30本身。另一方面，於使用原本不具有伸長性之片材作為片材31、32之情形時，對包含該片材31、32之複合體30'實施延伸處理。該延伸處理係藉由使複合體30'沿彈性絲33延伸之方向延伸，對該片材31、32賦予伸長性之操作而進行。於本製造方法中，如圖7所示，使用包含於周向交替地形成有齒與齒底之一對齒槽輥64、65之延伸裝置，對兩輥64、65間導入複合體30'並搬送其，藉此，使該複合體30'沿其搬送方向、即彈性絲33延伸之方向延伸。如此，可獲得目標之伸縮片材30。 In this way, the composite 30' in which the elastic wires 33 are sandwiched between the two sheets 31, 32 can be obtained. When the originally stretchable sheet is used as the sheets 31 and 32, the composite 30' becomes the stretch sheet 30 itself. On the other hand, in the case where a sheet which is not extensible is used as the sheets 31 and 32, the composite 30' including the sheets 31 and 32 is subjected to an elongation treatment. This stretching treatment is performed by extending the composite body 30' in the direction in which the elastic yarns 33 extend, and imparting elongation to the sheets 31 and 32. In the manufacturing method, as shown in FIG. 7, an extension device including a pair of teeth and a pair of tooth-toothed grooves 64 and 65 alternately formed in the circumferential direction is used, and a composite body 30' is introduced between the two rollers 64 and 65. Further, the composite body 30' is extended in the conveying direction, that is, the direction in which the elastic yarn 33 extends. In this way, the target stretch sheet 30 can be obtained.

外裝體3係藉由如下方式獲得：使如此獲得之伸縮片材30於該伸縮片材30之伸長狀態下與非伸縮片材36重疊並接合。例如將伸縮片材30以伸長狀態搬送，使其於該伸長狀態下與非伸縮片材36合流，經由預先塗佈於特定部位之接著劑而將兩片材30、36接合。就接合狀態下 之作為外裝體3之伸長容易性、收縮容易性之方面而言，伸縮片材30較佳為於在搬送方向伸長為1.1~4.0倍、更佳為1.2~3.0倍、進而較佳為1.5~2.5倍之狀態下，與非伸縮片材36接合。伸縮片材30之伸長倍率係將伸長狀態下之長度除以伸長前之自然狀態(收縮狀態)之長度而求出。兩片材30、36係於合流時或剛合流後由一對夾輥進行夾壓。經過以上步驟，可獲得作為伸縮片材30與非伸縮片材36之積層體之外裝體3。 The outer casing 3 is obtained by overlapping and joining the elastic sheet 30 thus obtained in the extended state of the elastic sheet 30 with the non-stretch sheet 36. For example, the stretch sheet 30 is conveyed in an extended state, joined to the non-stretch sheet 36 in the stretched state, and the two sheets 30 and 36 are joined via an adhesive previously applied to a specific portion. Under the joint state The stretch sheet 30 is preferably elongated in the transport direction by 1.1 to 4.0 times, more preferably 1.2 to 3.0 times, and still more preferably 1.5, in terms of ease of elongation and ease of shrinkage of the outer casing 3. In a state of ~2.5 times, it is joined to the non-stretch sheet 36. The elongation ratio of the stretch sheet 30 is obtained by dividing the length in the stretched state by the length of the natural state (contracted state) before stretching. The two sheets 30, 36 are crimped by a pair of nip rolls at the time of joining or just after joining. Through the above steps, the laminate 3 as the laminate of the stretch sheet 30 and the non-stretch sheet 36 can be obtained.

且說，本發明之伸縮片材只要包含彈性纖維及非彈性纖維即可，並不限定於上述伸縮片材30。伸縮片材30具有於以非彈性纖維為主體之可伸長之纖維層31、32之一面接合有彈性纖維(彈性絲33)之構成(二層構造)，且於伸縮片材30中彈性纖維及非彈性纖維於厚度方向分佈不均勻，但於本發明之伸縮片材中，亦可使彈性纖維與非彈性纖維混合。即，本發明之伸縮片材亦可為彈性纖維及非彈性纖維均勻地分佈於伸縮片材整體之單層構造之纖維混合類型。於本發明中，亦可重疊使用複數片該纖維混合類型之伸縮片材。又，於具備伸縮片材30之尿布1中，於側封部4之外側端面40之平滑區域35內，如上所述存在彈性絲33之「端部」，但於代替伸縮片材30而採用上述纖維混合類型之伸縮片材之情形時，於平滑區域35內存在該伸縮片材之彈性纖維，存在於平滑區域35內之彈性纖維之部位並不限定於「端部」。然而，於採用上述纖維混合類型之伸縮片材之情形時，平滑區域35之構成亦基本上與採用伸縮片材30之情形相同，適當應用採用伸縮片材30之情形時之上述說明。 In addition, the elastic sheet of the present invention is not limited to the above-described elastic sheet 30 as long as it contains elastic fibers and inelastic fibers. The stretch sheet 30 has a configuration in which one surface of the extensible fiber layers 31 and 32 mainly composed of inelastic fibers is bonded to an elastic fiber (elastic yarn 33) (two-layer structure), and elastic fibers in the stretch sheet 30 and The inelastic fibers are unevenly distributed in the thickness direction, but in the stretch sheet of the present invention, the elastic fibers may be mixed with the inelastic fibers. That is, the stretch sheet of the present invention may be a fiber blend type in which the elastic fibers and the non-elastic fibers are uniformly distributed in a single layer structure of the entire stretch sheet. In the present invention, a plurality of stretch sheets of the fiber blend type may be used in combination. Further, in the diaper 1 including the stretch sheet 30, the "end portion" of the elastic yarn 33 is present in the smooth region 35 of the outer end surface 40 of the side seal portion 4 as described above, but is used instead of the stretch sheet 30. In the case of the above-described fiber-mixed type of stretch sheet, the elastic fiber of the stretch sheet is present in the smooth region 35, and the portion of the elastic fiber existing in the smooth region 35 is not limited to the "end portion". However, in the case of using the above-described fiber-mixed type of stretch sheet, the configuration of the smooth region 35 is basically the same as in the case of using the stretch sheet 30, and the above description in the case where the stretch sheet 30 is used is suitably employed.

於混合有彈性纖維與非彈性纖維之上述纖維混合類型之伸縮片材中，作為非彈性纖維，可無特別限制地使用可於伸縮片材30中用作非彈性纖維者。又，彈性纖維係例如以熱塑性彈性體或橡膠等作為原料者。作為彈性纖維之原料，可無特別限制地使用可用作彈性絲33之 原料之熱塑性彈性體。作為彈性纖維，亦可使用包含熱塑性彈性體之芯鞘型或並列型之複合纖維。 In the elastic sheet of the above-mentioned fiber-mixing type in which the elastic fiber and the inelastic fiber are mixed, the non-elastic fiber can be used as the inelastic fiber in the stretch sheet 30 without any particular limitation. Further, the elastic fiber is made of, for example, a thermoplastic elastomer or rubber. As a raw material of the elastic fiber, it can be used as the elastic yarn 33 without any particular limitation. A thermoplastic elastomer of raw materials. As the elastic fiber, a core-sheath type or a side-by-side type composite fiber containing a thermoplastic elastomer can also be used.

作為上述纖維混合類型之伸縮片材中之彈性纖維，特佳者為由包含熱塑性聚胺基甲酸酯彈性體之聚合物所形成之纖維。該聚合物可僅包含熱塑性聚胺基甲酸酯彈性體，亦可包含除熱塑性聚胺基甲酸酯彈性體以外之其他聚合物。於彈性纖維中之總聚合物中熱塑性聚胺基甲酸酯彈性體所占之含有率較佳為10質量%以上，進而較佳為30質量%以上。 As the elastic fiber in the above-described fiber blend type stretch sheet, a fiber formed of a polymer containing a thermoplastic polyurethane elastomer is particularly preferred. The polymer may comprise only thermoplastic polyurethane elastomers, and may also comprise other polymers than thermoplastic polyurethane elastomers. The content of the thermoplastic polyurethane elastomer in the total polymer in the elastic fiber is preferably 10% by mass or more, and more preferably 30% by mass or more.

於上述纖維混合類型之伸縮片材中，彈性纖維之含量較佳為10質量%以上，進而較佳為30質量%以上。 In the above-mentioned fiber-mixed type of stretch sheet, the content of the elastic fiber is preferably 10% by mass or more, and more preferably 30% by mass or more.

上述纖維混合類型之伸縮片材較佳為不織布。作為不織布，可列舉熱風不織布、熱軋不織布、水針不織布、紡黏不織布、熔噴不織布、紡黏-熔噴-紡黏不織布、針軋不織布等。 The above-mentioned fiber blend type stretch sheet is preferably a non-woven fabric. Examples of the nonwoven fabric include hot air non-woven fabric, hot rolled non-woven fabric, water jet non-woven fabric, spunbonded non-woven fabric, melt-blown non-woven fabric, spunbond-meltblown-spun non-woven fabric, needle-punched nonwoven fabric, and the like.

上述纖維混合類型之伸縮片材之厚度較佳為0.5mm以上，進而較佳為0.7mm以上，而且，較佳為4mm以下，進而較佳為3mm以下，更具體而言，較佳為0.5~4mm，進而較佳為0.7~3mm。又，就質感、厚度及設計性等觀點而言，上述纖維混合類型之伸縮片材之基重較佳為20g/m2以上，進而較佳為25g/m2以上，而且，較佳為90g/m2以下，進而較佳為80g/m2以下，更具體而言，較佳為20~90g/m2，進而較佳為25~80g/m2。 The thickness of the fiber-mixed type of stretch sheet is preferably 0.5 mm or more, more preferably 0.7 mm or more, and further preferably 4 mm or less, further preferably 3 mm or less, and more specifically, preferably 0.5-. 4 mm, and further preferably 0.7 to 3 mm. Further, the basis weight of the fiber-mixing type stretch sheet is preferably 20 g/m 2 or more, more preferably 25 g/m 2 or more, and further preferably 90 g, in terms of texture, thickness, design, and the like. /m 2 or less, further preferably 80 g/m 2 or less, more specifically, 20 to 90 g/m 2 , and more preferably 25 to 80 g/m 2 .

上述纖維混合類型之伸縮片材可與此種纖維片材(混合有複數種纖維之纖維片材)同樣地製造，例如於該伸縮片材為不織布之情形時，可利用公知之紡黏法或熔噴法製造，例如可利用日本專利特開2004-244790或日本專利特開2005-089870中所記載之方法而製造。 The above-mentioned fiber-mixing type stretch sheet can be produced in the same manner as the fiber sheet (fiber sheet in which a plurality of types of fibers are mixed). For example, when the stretch sheet is a non-woven fabric, a known spunbond method or The melt-blown method can be produced, for example, by the method described in JP-A-2004-244790 or JP-A-2005-089870.

以上，對本發明(第1發明)基於其較佳之實施態樣進行了說明，但本發明並不限定於上述實施態樣。例如於上述實施態樣中，如圖3 及圖5所示，於側封部4之厚度方向(圖3之上下方向、圖5之左右方向)之中央部存在非伸縮片材36，隔著該非伸縮片材36於該厚度方向之兩側存在伸縮片材30(外層片材31及內層片材32)，但兩片材30、36之積層順序並無特別限制，例如亦可與上述實施態樣相反地，於側封部4之厚度方向之中央部存在伸縮片材30，隔著該伸縮片材30於該厚度方向之兩側存在非伸縮片材36。又，外裝體3亦可包括複數片兩片材30、36中之任一者或兩者。又，對於上述實施態樣之外裝體3，亦可與此種褲型拋棄式尿布中之外裝體同樣地配置腰圍皺褶形成用彈性構件、腿部皺褶形成用彈性構件。 As described above, the present invention (first invention) has been described based on preferred embodiments, but the present invention is not limited to the above embodiment. For example, in the above embodiment, as shown in FIG. 3 As shown in Fig. 5, a non-elastic sheet 36 is present in a central portion of the side seal portion 4 in the thickness direction (the vertical direction in Fig. 3 and the left-right direction in Fig. 5), and the non-elastic sheet 36 is interposed in the thickness direction. The stretch sheet 30 (the outer layer sheet 31 and the inner layer sheet 32) are present on the side, but the order of lamination of the two sheets 30 and 36 is not particularly limited. For example, contrary to the above embodiment, the side seal portion 4 may be present. The stretch sheet 30 is present in the center portion in the thickness direction, and the non-stretch sheet 36 is present on both sides in the thickness direction via the stretch sheet 30. Further, the exterior body 3 may also include any one or both of a plurality of sheets 30, 36. In the outer casing 3 of the above-described embodiment, the elastic member for forming the waist wrinkles and the elastic member for forming the leg gathers may be disposed in the same manner as the outer casing of the pant-type disposable diaper.

又，於上述實施態樣中，外裝體3係包含伸縮片材30與非伸縮片材36之積層體而構成，但亦可不包含非伸縮片材36。但是，就提高側封部4之密封強度等觀點而言，外裝體3較佳為包含伸縮片材30與非伸縮片材36之積層體而構成，特佳為如上述實施態樣般，於側封部4之厚度方向之中央部存在非伸縮片材36，隔著該非伸縮片材36於該厚度方向之兩側存在伸縮片材30之態樣。該態樣尤其是於伸縮片材30之基重較大之情形時，具體而言，於伸縮片材30之基重為10g/m2以上之情形時有效。如上所述，伸縮片材30係對包含片材31、32之複合體30'實施延伸處理而獲得(參照圖7)，尤其是基重較大之伸縮片材30係藉由該延伸處理而形成為片材整體起伏之波浪形狀。因此，於外裝體3不包含非伸縮片材36而僅包含該波浪形狀之伸縮片材30地構成之情形時，於包含該外裝體3之側封部4中存在波浪形狀之伸縮片材30彼此之接合。此情形時，就基重較大之波浪形狀之伸縮片材30、30彼此之接合而言，有如下之虞：兩者之波形之凹凸未較好地吻合，兩片材30、30間之接觸點數變少，而密封強度降低。相對於此，若如上述實施態樣般，於側封部4之厚度方向之中央部存在非伸縮片材36，且隔著該非伸縮片材36於該厚度方向之兩側存在伸縮片材30，則即便位於 非伸縮片材36之厚度方向之兩側之伸縮片材30分別具有波浪形狀，於形成側封部4時(熔斷外裝體3時)，非伸縮片材36之熔融樹脂亦進入至該波形之凹凸，故而藉由該樹脂之投錨效應，側封部4具有實用上充分之密封強度。 Moreover, in the above embodiment, the exterior body 3 is configured by including a laminate of the stretch sheet 30 and the non-stretch sheet 36, but may not include the non-elastic sheet 36. However, from the viewpoint of improving the sealing strength of the side seal portion 4, the outer casing 3 preferably includes a laminate of the stretch sheet 30 and the non-stretch sheet 36, and particularly preferably as described above. The non-stretch sheet 36 is present in the central portion in the thickness direction of the side seal portion 4, and the stretch sheet 30 is present on both sides in the thickness direction via the non-retractable sheet 36. This aspect is particularly effective when the basis weight of the stretch sheet 30 is large, specifically, when the basis weight of the stretch sheet 30 is 10 g/m 2 or more. As described above, the stretch sheet 30 is obtained by performing the stretching process on the composite 30' including the sheets 31 and 32 (refer to FIG. 7), and in particular, the stretch sheet 30 having a larger basis weight is subjected to the stretching process. It is formed into a wave shape in which the sheet is undulating as a whole. Therefore, when the outer casing 3 does not include the non-elastic sheet 36 and only includes the corrugated elastic sheet 30, the wavy-shaped elastic sheet is present in the side seal portion 4 including the outer casing 3. The materials 30 are joined to each other. In this case, in the case where the wavy-shaped stretch sheets 30 and 30 having a large basis weight are joined to each other, there are the following points: the irregularities of the waveforms of the two are not well matched, and the two sheets 30 and 30 are The number of contact points is reduced, and the sealing strength is lowered. On the other hand, in the above-described embodiment, the non-stretch sheet 36 is present in the central portion in the thickness direction of the side seal portion 4, and the stretch sheet 30 is present on both sides in the thickness direction via the non-elastic sheet 36. Then, even if the stretch sheets 30 on both sides in the thickness direction of the non-stretch sheet 36 have wave shapes, when the side seal portions 4 are formed (when the outer body 3 is melted), the molten resin of the non-elastic sheets 36 is also Since the irregularities of the waveform are entered, the side seal portion 4 has a practically sufficient sealing strength by the anchoring effect of the resin.

以下，將本發明(第2發明)基於其較佳之實施態樣一面參照圖式一面進行說明。如圖8~圖10所示，作為本發明之褲型拋棄式尿布之一實施態樣之尿布1A係如下褲型拋棄式尿布，即，包含：吸收性本體2；及外裝體3，其配置於該吸收性本體2之非肌膚對向面側並將該吸收性本體2固定；且將腹側部F中之外裝體3之沿縱方向X之兩側緣部3F、3F與背側部R中之外裝體3之沿縱方向X之兩側緣部3R、3R接合而形成一對側封部4、4、腰部開口部5及一對腿部開口部6、6。再者，關於尿布1A(第2發明)，以與上述尿布1(第1發明)不同之構成部分為主進行說明，相同之構成部分係標註同一符號並省略說明。未特別說明之構成部分係適當應用關於尿布1(第1發明)之說明。 Hereinafter, the present invention (second invention) will be described with reference to the drawings based on preferred embodiments thereof. As shown in FIG. 8 to FIG. 10, a diaper 1A which is one embodiment of the pants-type disposable diaper according to the present invention is a pant-type disposable diaper comprising: an absorbent body 2; and an exterior body 3, Disposed on the non-skin opposing side of the absorbent body 2 and fixing the absorbent body 2; and the side edges 3F, 3F and the back of the outer casing 3 in the longitudinal direction X of the outer side portion F In the side portion R, the side edges 3R and 3R of the outer casing 3 in the longitudinal direction X are joined to each other to form a pair of side seal portions 4 and 4, a waist opening portion 5, and a pair of leg opening portions 6 and 6. In the diaper 1A (the second invention), the components which are different from the diaper 1 (the first invention) will be mainly described, and the same components will be denoted by the same reference numerals and will not be described. The description of the diaper 1 (first invention) is applied as appropriate to the components that are not particularly described.

外裝體3係包含積層有2片片材31、32之構造之伸縮片材30而構成。關於外裝體3係如圖9所示，將其縱方向X之前後端部分別向肌膚對向面側回折，於藉由該回折而相對向之2片外裝體3、3(2片伸縮片材30、30)間，藉由接著劑將複數根線狀之腰部彈性構件51以伸長狀態接合固定。藉此，於腰部開口部5之開口端部形成腰部皺褶。 The exterior body 3 is configured to include an elastic sheet 30 having a structure in which two sheets 31 and 32 are laminated. As shown in FIG. 9, the exterior body 3 is folded back toward the skin facing surface side in the longitudinal direction X, and the two outer casings 3 and 3 are opposed to each other by the folding back (2 pieces) Between the stretch sheets 30 and 30), a plurality of linear waist elastic members 51 are joined and fixed in an extended state by an adhesive. Thereby, a waist gather is formed at the opening end portion of the waist opening portion 5.

側封部4係由構成外裝體3之複數片片材(外層片材31、內層片材32)之緣部於重疊之狀態下熔接而形成，且具有熔接部。就使側封部4不易顯眼並對尿布1A賦予如內褲般之外觀之觀點而言，側封部4(側封部4之熔接部)之厚度(寬度)4W(參照圖10)較理想為較小，但若過小，則側封部4成為突起狀而會令人感到疼痛。就該觀點而言，側封部4之厚度4W較佳為0.2mm以上，進而較佳為0.25mm以上，而且，較佳為2mm以下，進而較佳為1.5mm以下，更具體而言，較佳為0.2~2 mm，進而較佳為0.25~1.5mm。作為可將厚度4W調整為該範圍之方法之一例，可列舉如下方法：使用雷射光作為外裝體3(片材31、32)之熔斷手段，對外裝體3中之側封部4之形成預定部位照射雷射光而將其熔斷，藉此形成側封部4。關於側封部之厚度4W係藉由顯微鏡(KEYENCE公司製造之VHX-1000)等以50~200倍之倍率於無荷重下觀察在一塊尿布之側封部中在長度方向相隔之3個部位之剖面，於各剖面中分別求出測定對象部位之厚度，設為3個部位之厚度之平均值而求出。 The side seal portion 4 is formed by welding the edges of the plurality of sheets (the outer layer sheet 31 and the inner layer sheet 32) constituting the outer casing 3 in a state of being overlapped, and has a welded portion. The thickness (width) 4W (see FIG. 10) of the side seal portion 4 (the welded portion of the side seal portion 4) is preferably 4W (see FIG. 10) from the viewpoint of making the side seal portion 4 less conspicuous and imparting a pant-like appearance to the diaper 1A. It is small, but if it is too small, the side seal part 4 will become a protrusion shape, and it will be painful. From this point of view, the thickness 4W of the side seal portion 4 is preferably 0.2 mm or more, more preferably 0.25 mm or more, and further preferably 2 mm or less, further preferably 1.5 mm or less, and more specifically, more specifically Good for 0.2~2 Mm is further preferably 0.25 to 1.5 mm. An example of a method of adjusting the thickness 4W to the range is a method in which laser light is used as a fuse means of the exterior body 3 (sheets 31, 32), and the side seal portion 4 in the exterior body 3 is formed. The predetermined portion is irradiated with the laser light to be blown, whereby the side seal portion 4 is formed. The thickness 4W of the side seal portion is observed by a microscope (VHX-1000 manufactured by KEYENCE Co., Ltd.) at a ratio of 50 to 200 times under a load without load in three portions spaced apart in the longitudinal direction of the side seal portion of a diaper. In the cross section, the thickness of the measurement target portion was obtained in each of the cross sections, and the average value of the thicknesses of the three portions was determined.

伸縮片材30係具有於以非彈性纖維為主體之可伸長之纖維層之一面接合有線狀之彈性絲之構成者，故而於本實施態樣中，如圖4所示，包含外層片材31及內層片材32之2片片材、以及夾持於兩片材31、32間之複數根線狀之彈性絲33而構成。關於伸縮片材30之構成及製造方法係如上所述。如圖9及圖10所示，片材31形成尿布1A之外表面(外裝體3之非肌膚對向面)，片材32形成尿布1A之內表面(外裝體3之肌膚對向面)。 The stretch sheet 30 has a structure in which one of the stretchable fiber layers mainly composed of the inelastic fibers is bonded to the linear elastic yarn. Therefore, in the present embodiment, as shown in FIG. 4, the outer layer sheet 31 is included. And two sheets of the inner layer sheet 32 and a plurality of linear elastic threads 33 sandwiched between the two sheets 31 and 32. The configuration and manufacturing method of the stretch sheet 30 are as described above. As shown in Fig. 9 and Fig. 10, the sheet 31 forms the outer surface of the diaper 1A (the non-skin opposing surface of the outer casing 3), and the sheet 32 forms the inner surface of the diaper 1A (the skin facing surface of the outer casing 3) ).

作為具備包含伸縮片材30而構成之外裝體3之本實施態樣之尿布1A之主要特徵之一，可列舉如下方面：如圖11及圖12所示，於側封部4之外側端面40形成有複數個(多個)非彈性纖維34之球狀之端部34a密集而形成之球體密集區域35，且於該區域35內存在彈性絲33之端部33a。如圖10所示，側封部4之外側端面40位於尿布1A之兩側部，遍及側封部4之長度方向(圖8之上下方向)之全長而連續。外側端面40至少於尿布1A之穿著狀態(將腰部開口部5撐開之狀態)下露出至外部。再者，圖11及圖12終究為模式性地表示球體密集區域35之圖，本發明(第2發明)之球體密集區域並不限定於該等圖中所記載之態樣。 One of the main features of the diaper 1A of the present embodiment including the outer casing 3 including the elastic sheet 30 is as follows: as shown in FIGS. 11 and 12, the outer end surface of the side seal portion 4 is shown. 40 is formed with a spherical dense region 35 in which a spherical end portion 34a of a plurality of inelastic fibers 34 is densely formed, and an end portion 33a of the elastic yarn 33 is present in the region 35. As shown in Fig. 10, the outer end surface 40 of the side seal portion 4 is located on both side portions of the diaper 1A, and is continuous over the entire length of the side seal portion 4 (the upper and lower directions in Fig. 8). The outer end surface 40 is exposed to the outside at least in a state in which the diaper 1A is worn (a state in which the waist opening portion 5 is stretched). Further, FIG. 11 and FIG. 12 are diagrams schematically showing the spherical dense region 35, and the spherical dense region of the present invention (second invention) is not limited to the one described in the drawings.

於本實施態樣中，球體密集區域35形成於側封部4之外側端面40之整個區域。於球體密集區域35中，鄰接之球狀之端部34a、34a彼此 相互接合而成為一體，形成熔接部。如圖12所示，形成於側封部4之外側端面40之球體密集區域35之外表面係多個球狀之端部34a之大致半球狀之前端部於面方向相連而形成，成為微細之凹凸連續之凹凸面。又，如此多個球狀之端部34a相互接合而形成球體密集區域35，故而於球體密集區域35中之鄰接之球狀之端部34a、34a間，形成有空隙(未圖示)。該空隙未必形成於球體密集區域35中之所有鄰接之球狀之端部34a、34a間，但形成得相當多。 In the present embodiment, the spherical dense region 35 is formed over the entire area of the outer end surface 40 of the side seal portion 4. In the sphere-dense region 35, the adjacent spherical ends 34a, 34a are in contact with each other The joints are joined to each other to form a welded portion. As shown in FIG. 12, the substantially hemispherical front end portions of the spherical end portions 34a formed on the outer surface of the outer side end surface 40 of the side seal portion 4 are formed in a substantially hemispherical front end portion, and are formed in a fine manner. Concave and convex continuous surface. Further, since the plurality of spherical end portions 34a are joined to each other to form the spherical dense region 35, a gap (not shown) is formed between the adjacent spherical end portions 34a and 34a of the spherical dense region 35. This void is not necessarily formed between all of the adjacent spherical end portions 34a, 34a in the dense region 35 of the sphere, but is formed considerably.

如圖11所示，於球體密集區域35，腹側部F側之外裝體3(伸縮片材30)中之彈性絲33之端部33a於該區域35(側封部4)之長度方向(縱方向X)隔開特定間隔配置有複數個，並且背側部R側之外裝體3(伸縮片材30)中之彈性絲33之端部33a於縱方向X隔開特定間隔配置有複數個。非彈性纖維34之球狀之端部34a係以填埋該等複數根彈性絲33之端部33a間之間隔之方式存在多個。如圖12所示，各彈性絲33之端部33a係彎曲並帶有弧度，而不尖銳。又，各彈性絲33之端部33a係於橫方向Y存在於與非彈性纖維34之球狀之端部34a大致相同位置，或存在於較端部34a稍許偏靠橫方向Y之內側(圖11及圖12之下方側)，實質上並未突出至較該端部34a更為橫方向Y之外側。即，於側封部4之外側端面40中，各彈性絲33之端部33a係存在於與其周邊部、即非彈性纖維34之端部34a或球體密集區域35之外表面大致相同之位置，且並未突出至較該周邊部更為外側。 As shown in Fig. 11, in the spherical dense region 35, the end portion 33a of the elastic yarn 33 in the outer casing 3 (the elastic sheet 30) in the outer side F side is in the longitudinal direction of the region 35 (side seal portion 4). A plurality of (longitudinal directions X) are arranged at a predetermined interval, and the end portions 33a of the elastic wires 33 in the outer casing 3 (the elastic sheet 30) of the back side portion R are arranged at a predetermined interval in the longitudinal direction X. Multiple. The spherical end portion 34a of the inelastic fiber 34 is plural in order to fill the space between the end portions 33a of the plurality of elastic wires 33. As shown in Fig. 12, the end portions 33a of the respective elastic wires 33 are curved and curved without being sharp. Further, the end portion 33a of each of the elastic wires 33 is present at substantially the same position as the spherical end portion 34a of the inelastic fiber 34 in the lateral direction Y, or is located slightly inside the lateral direction Y of the opposite end portion 34a (Fig. 11 and the lower side of FIG. 12 do not substantially protrude beyond the lateral direction Y of the end portion 34a. That is, in the outer end surface 40 of the side seal portion 4, the end portion 33a of each of the elastic wires 33 is present at substantially the same position as the peripheral portion thereof, that is, the end portion 34a of the inelastic fiber 34 or the outer surface of the spherical dense region 35. It does not protrude to the outside of the peripheral portion.

若如此於側封部4之外側端面40形成球體密集區域35，則觸碰到區域35時之壓力藉由形成區域35之多根非彈性纖維34之球狀之端部34a而分散，故而即便例如尿布1A之穿著者以手指觸碰到該區域35，亦不會刺痛，而不易感到疼痛。因此，外側端面40之觸感提高。又，於球體密集區域35，存在於尿布1A之穿著中發揮收縮力之彈性絲33，故而貫穿整個穿著中，該收縮力不易降低，得以有效地防止於穿 著中尿布1A偏移下落等不良情況。 When the spherical dense region 35 is formed on the outer end surface 40 of the side seal portion 4, the pressure when the region 35 is touched is dispersed by the spherical end portion 34a of the plurality of inelastic fibers 34 forming the region 35, so that even For example, the wearer of the diaper 1A touches the area 35 with a finger, and does not tingle, and is less likely to feel pain. Therefore, the feeling of the outer end surface 40 is improved. Further, in the spherical dense region 35, the elastic yarn 33 exhibiting the contracting force during the wearing of the diaper 1A is formed, so that the contraction force is not easily lowered throughout the entire wearing, and the wearing is effectively prevented from being worn. In the middle of the diaper 1A offset and other problems.

就更確實地發揮球體密集區域35之上述作用效果之觀點而言，非彈性纖維34之球狀之端部34a之直徑較佳為3μm以上，進而較佳為5μm以上，而且，較佳為150μm以下，進而較佳為130μm以下，更具體而言，較佳為3~150μm，進而較佳為5~130μm。球狀之端部34a之直徑係以如下方式測定。即，藉由顯微鏡以50~500倍之倍率觀察側封部之外側端面(熔斷面)，測定此處所觀察到之纖維之球狀之端部之直徑。 The spherical end portion 34a of the inelastic fiber 34 preferably has a diameter of 3 μm or more, more preferably 5 μm or more, and preferably 150 μm, from the viewpoint of more effectively exerting the above-described effects of the spherical dense region 35. Hereinafter, it is preferably 130 μm or less, and more specifically, preferably 3 to 150 μm, and more preferably 5 to 130 μm. The diameter of the spherical end portion 34a is measured in the following manner. Specifically, the outer end surface (melt cross section) of the side seal portion was observed by a microscope at a magnification of 50 to 500 times, and the diameter of the spherical end portion of the fiber observed here was measured.

上述尿布1A例如可藉由以下所說明之製造方法進行製造。本實施態樣之褲型拋棄式尿布之製造方法包括如下步驟：使包含腹側部F之前身片連續體與包含背側部R之後身片連續體重疊而獲得尿布連續體，以使該尿布連續體沿該尿布連續體中之伸縮片材30之伸縮方向(橫方向Y)伸長之狀態，將該尿布連續體中之側封部4之形成預定部位熔斷而形成該側封部4。再者，以將尿布1A於縱方向X分成兩部分之假想直線(未圖示)為基準，腹側部F側為尿布1A之前身片，背側部R側為尿布1A之後身片。上述前身片連續體係複數個前身片於一方向(搬送方向)相連而形成，上述後身片連續體係複數個後身片於一方向(搬送方向)相連而形成。 The diaper 1A can be manufactured, for example, by the manufacturing method described below. The manufacturing method of the pants-type disposable diaper according to the embodiment includes the steps of: superimposing the corpus continuous body including the ventral side portion F with the corpus continuous body including the back side portion R to obtain a diaper continuous body, so that the diaper is obtained The continuous body is stretched in the expansion/contraction direction (lateral direction Y) of the stretch sheet 30 in the diaper continuous body, and the side seal portion 4 is formed by blowing a predetermined portion of the side seal portion 4 in the diaper continuous body. Further, based on a virtual straight line (not shown) that divides the diaper 1A into two in the longitudinal direction X, the front side F side is the front piece of the diaper 1A, and the back side R side is the back piece of the diaper 1A. The front body piece continuous system is formed by connecting a plurality of front body pieces in one direction (transport direction), and the back body piece continuous system is formed by connecting a plurality of back body pieces in one direction (transport direction).

首先，如圖13所示，於自原片輥(未圖示)連續地供給之帶狀之外裝體3(帶狀之伸縮片材30)(外裝體連續體)中之內層片材32上，間歇地配置並固定按照常規方法另外製造之吸收性本體2。於吸收性本體2及/或內層片材32，預先塗佈有熱熔接著劑等接著劑，藉由該接著劑而將吸收性本體2固定於外裝體3(內層片材32)。又，與該吸收性本體2之配置同時地，將複數根腰部彈性構件51以伸長至特定之伸長率之伸長狀態配置於帶狀之外裝體3之沿寬度方向之兩側部3a、3a上。於導入該腰部彈性構件51時，藉由接著劑塗佈機(未圖示)，對腰部彈性構 件51連續或間歇地塗佈熱熔接著劑。 First, as shown in FIG. 13, the inner layer sheet in the belt-shaped outer casing 3 (belt-shaped elastic sheet 30) (outer body continuous body) continuously supplied from the original sheet roll (not shown) On the material 32, the absorbent body 2 additionally manufactured in accordance with a conventional method is intermittently disposed and fixed. An adhesive such as a hot-melt adhesive is applied to the absorbent main body 2 and/or the inner layer sheet 32 in advance, and the absorbent main body 2 is fixed to the outer casing 3 (the inner layer sheet 32) by the adhesive. . Further, at the same time as the arrangement of the absorbent main body 2, the plurality of waist elastic members 51 are disposed in an extended state in which the elongation to a specific elongation is disposed on both side portions 3a, 3a of the belt-shaped outer casing 3 in the width direction. on. When the waist elastic member 51 is introduced, the waist elastic structure is applied by an adhesive applicator (not shown) The piece 51 is coated with a hot melt adhesive continuously or intermittently.

其次，如圖13所示，於配置有吸收性本體2及腰部彈性構件51之帶狀之外裝體3之特定部位形成腿部孔LH。該腿部孔形成步驟可使用旋轉切割器、雷射切割器等與先前以來此種物品之製造方法中之手法相同之手法而實施。再者，腿部孔之形成亦可並非如本實施態樣般於配置吸收性本體2後實施，而於配置前實施。 Next, as shown in FIG. 13, the leg hole LH is formed in the specific part of the tape-shaped exterior body 3 in which the absorptive main body 2 and the waist elastic member 51 are arrange|positioned. The leg hole forming step can be carried out using a rotary cutter, a laser cutter or the like in the same manner as in the prior art method of manufacturing such an article. Further, the formation of the leg holes may not be performed after the absorbent body 2 is disposed as in the present embodiment, but may be performed before the arrangement.

繼而，將帶狀之外裝體3以使其腹側部F側與背側部R側重疊之方式於寬度方向(與帶狀之外裝體3之長度方向正交之方向)摺疊。更具體而言，如圖13所示，將帶狀之外裝體3之沿長度方向(搬送方向MD)之兩側部3a、3a以覆蓋腰部彈性構件51之方式回折而將該彈性構件51固定之後，將該外裝體3與吸收性本體2一併於其寬度方向CD對折。即，使包含腹側部F之前身片連續體與包含背側部R之後身片連續體重疊。帶狀之外裝體3之長度方向(搬送方向MD，Machine Direction)係與尿布1A之橫方向Y一致，且帶狀之外裝體3之寬度方向CD(Cross machine Direction)係與尿布1A之縱方向X一致。如此一來，可獲得複數個尿布1A之前身(未形成一對側封部4、4之褲型拋棄式尿布)於一方向(橫方向Y)相連而成之尿布連續體10。 Then, the tape-shaped exterior body 3 is folded in the width direction (direction orthogonal to the longitudinal direction of the tape-shaped exterior body 3) so that the front side portion F side and the back side portion R side overlap each other. More specifically, as shown in FIG. 13, the both side portions 3a, 3a of the belt-shaped outer casing 3 in the longitudinal direction (transport direction MD) are folded back so as to cover the waist elastic member 51, and the elastic member 51 is folded back. After the fixing, the outer casing 3 and the absorbent body 2 are folded in half in the width direction CD. That is, the body continuous body including the front side portion F is overlapped with the body piece continuous body including the back side portion R. The longitudinal direction of the belt-shaped outer casing 3 (the direction of conveyance MD, the direction of the machine) is the same as the transverse direction Y of the diaper 1A, and the width direction of the belt-shaped outer casing 3 is CD (Cross Machine Direction) and the diaper 1A. The longitudinal direction X is consistent. In this way, the diaper continuous body 10 in which a plurality of diapers 1A (the pants-type disposable diapers having no pair of side seal portions 4 and 4 are formed) are connected in one direction (lateral direction Y) can be obtained.

繼而，於使尿布連續體10在長度方向(搬送方向MD)伸長之狀態下，將該尿布連續體10中之側封部形成預定部位4'熔斷，而形成側封部4。尿布連續體10之長度方向係與該尿布連續體10中之伸縮片材30之伸縮方向(尿布1A之橫方向Y、彈性絲33延伸之方向)相同之方向。作為熔斷手段，只要為能夠使部位4'(伸縮片材30)之形成材料(纖維等)熔融而將其切斷之手段，則並無特別限制，例如可列舉雷射光、經加熱之切斷刀、使用過加熱之公知之熱封機構之熱封、使用過振動之公知之超音波密封機構之超音波密封等。於該等熔斷手段中，尤其是雷射光可使側封部4之寬度4W(參照圖10)相對較小，且對於使側封 部4不易自外部顯眼較有效，故而較佳。 Then, in a state where the diaper continuous body 10 is stretched in the longitudinal direction (transport direction MD), the side seal portion forming portion 4' in the diaper continuous body 10 is melted to form the side seal portion 4. The longitudinal direction of the diaper continuous body 10 is the same direction as the direction in which the stretchable sheet 30 in the diaper continuous body 10 is stretched (the transverse direction Y of the diaper 1A, the direction in which the elastic yarn 33 extends). The means for breaking the material (fiber or the like) of the portion 4' (the elastic sheet 30) and melting it is not particularly limited, and examples thereof include laser light and heated cutting. Knife, heat sealing of a known heat sealing mechanism using heating, ultrasonic sealing of a known ultrasonic sealing mechanism using vibration. Among the fuse means, in particular, the laser light can make the width 4W of the side seal portion 4 (refer to FIG. 10) relatively small, and for the side seal The portion 4 is not easily effective from the outside, and is therefore preferred.

關於側封部形成預定部位4'係腰部開口部5(參照圖8)之開口端部及其附近成為重疊有8片片材之8層構造部分，除此以外之部分成為重疊有4片片材之4層構造部分。如圖10及圖11所示，關於4層構造部分係包含構成腹側部F中之1片外裝體3(伸縮片材30)之2片片材(外層片材31及內層片材32)、以及同樣地構成背側部R中之1片外裝體3之2片片材31、32，且將該等4片片材積層而構成。另一方面，關於8層構造部分係如上所述，於製造尿布連續體10時將帶狀之外裝體3之兩側部3a、3a以覆蓋腰部彈性構件51之方式回折(參照圖13)，因此於腹側部F及背側部R分別存在2片外裝體3且使該等共計4片外裝體3、3予以積層，故而，結果積層有8片片材31、32而構成。 The opening end portion of the side seal portion forming portion 4' is the waist end opening portion 5 (see FIG. 8) and the vicinity thereof is an eight-layer structure portion in which eight sheets are stacked, and the other portions are overlapped with four sheets. The 4-layer structure of the material. As shown in FIG. 10 and FIG. 11 , the four-layer structure includes two sheets (the outer layer sheet 31 and the inner layer sheet) constituting one outer covering body 3 (the stretch sheet 30) of the front side portion F. 32) and two sheets 31 and 32 of one outer casing 3 in the back side portion R are similarly formed, and these four sheets are laminated. On the other hand, as for the eight-layer structure portion, as described above, when the diaper continuous body 10 is manufactured, the both side portions 3a, 3a of the belt-shaped outer casing 3 are folded back so as to cover the waist elastic member 51 (refer to Fig. 13). Therefore, since two outer casings 3 are present in the front side portion F and the back side portion R, and a total of four outer casings 3 and 3 are laminated, as a result, eight sheets 31 and 32 are laminated to form a laminate. .

於使用例如雷射光作為熔斷手段之情形時，若對4層構造之側封部形成預定部位4'照射雷射光，則存在於部位4'之片材31、32之形成材料(彈性絲33、非彈性纖維34等)係因由雷射光之直射所產生之發熱而氣化並自尿布連續體部分消失，又，存在於部位4'之附近之形成材料係藉由雷射光而間接地被加熱並熔融。其結果，將部位4'熔斷，以自尿布連續體10將1個單片之尿布前身切開之形式，將帶狀之尿布連續體10分割，與此同時，藉由該分割而產生之單片之尿布前身中之4片片材31、32之切斷緣部彼此、及經切開之尿布連續體10中之4片片材31、32之切斷緣部彼此分別熔接。片材31、32之切斷緣部係於雷射光之照射中及照射剛結束之後發熱而成為熔融狀態，但自照射結束後，容易被與尿布連續體10及單片之尿布前身接觸之熔斷裝置構成構件(未圖示)冷卻，且因向外部氣體或該裝置構成構件之傳熱而迅速地冷卻並固化，成為該切斷緣部之形成材料熔融一體化而得之熔接部。於對8層構造之側封部形成預定部位4'照射雷射光之情形時，亦同樣地於部位4'形成熔接部。藉由如此形成熔接部，形成1個尿布1A中之 一對側封部4、4中之一者。之後，藉由重複相同之操作，而連續地製造包含包括一對側封部4、4之外裝體3(伸縮片材30)之褲型拋棄式尿布1A。 In the case where, for example, laser light is used as the fuse means, if the side seal portion forming the predetermined portion 4' of the four-layer structure is irradiated with the laser light, the forming material of the sheets 31, 32 existing in the portion 4' (the elastic yarn 33, The inelastic fibers 34 and the like are vaporized by the heat generated by the direct irradiation of the laser light and partially disappear from the diaper continuum, and the forming material existing in the vicinity of the portion 4' is indirectly heated by the laser light and Melt. As a result, the portion 4' is melted, and the strip-shaped diaper continuous body 10 is divided into a form in which the diaper precursor is cut from the diaper continuous body 10, and at the same time, the single piece produced by the division is produced. The cut edge portions of the four sheets 31 and 32 in the diaper front body and the cut edge portions of the four sheets 31 and 32 of the cut diaper continuous body 10 are welded to each other. The cut edge portions of the sheets 31 and 32 are heated in the irradiation of the laser light and immediately after the irradiation, and are melted. However, after the end of the irradiation, the sheets 31 and 32 are easily blown by contact with the diaper continuous body 10 and the single diaper precursor. The device constituting member (not shown) is cooled, and is rapidly cooled and solidified by heat transfer to the outside air or the device constituting member, and is a welded portion obtained by melting and integrating the forming material of the cutting edge portion. When the predetermined portion 4' is irradiated with the laser beam in the side seal portion of the eight-layer structure, the welded portion is similarly formed in the portion 4'. By forming the welded portion in this way, one of the diapers 1A is formed. One of the pair of side seal portions 4, 4. Thereafter, the pants-type disposable diaper 1A including the pair of side seal portions 4, 4 outer casing 3 (the stretch sheet 30) is continuously manufactured by repeating the same operation.

於上述尿布連續體10之熔斷中，特別重要的是將尿布連續體10於沿該尿布連續體10中之伸縮片材30之伸縮方向(搬送方向MD、彈性絲33延伸之方向)伸長之狀態下熔斷(例如照射雷射光)。為了使作為構成外裝體3之伸縮片材30中之外層片材31及內層片材32之構成纖維之非彈性纖維34的側封部4之外側端面40中之端部34a為球狀，並於該外側端面40形成球體密集區域35，必須於使伸縮片材30(片材31、32及彈性絲33)伸長之狀態下進行熔斷。 In the fusing of the diaper continuous body 10, it is particularly important that the diaper continuous body 10 is elongated in the direction in which the stretchable sheet 30 in the diaper continuous body 10 is stretched (the transport direction MD, the direction in which the elastic yarn 33 extends). Blow down (for example, illuminating laser light). The end portion 34a of the outer side end surface 40 of the side seal portion 4 of the inelastic fiber 34 which is the constituent fiber of the outer layer sheet 31 and the inner layer sheet 32 in the stretch sheet 30 constituting the outer casing 3 is spherical. The spherical dense region 35 is formed on the outer end surface 40, and the elastic sheet 30 (the sheets 31, 32 and the elastic yarn 33) must be melted in a state where the elastic sheet 30 is stretched.

可推測出非彈性纖維34之球狀之端部34a(參照圖11及圖12)係以伸縮片材30(尿布連續體10)之伸長狀態下之熔斷為條件，以如下方式形成。例如，於對伸長狀態之片材30中之側封部形成預定部位4'照射雷射光而將其熔斷之情形時，於該熔斷剛結束後，藉由熔斷而產生之片材31、32之切斷緣部中之該片材31、32之多根構成纖維(非彈性纖維34)之端部分別為樹脂成分熔融之熔融狀態，該熔融樹脂係因表面張力而成為球狀。又，於熔斷後，片材31、32被自伸長狀態釋放而恢復成非伸長狀態(自然狀態)，故而對該片材31、32之多根非彈性纖維34各者之球狀之端部，除施加表面張力以外亦施加恢復成該非伸長狀態之力，藉此，熔融樹脂於該端部集合，成為更大之球狀。此處，若大量熔融樹脂集合於多根非彈性纖維34各者之球狀之端部，則該等球狀之端部一體化而成為不定形狀之樹脂之塊(樹脂塊)，但因分佈於片材31、32之切斷緣部之多根彈性絲33之伸長力之作用，於各非彈性纖維34之端部未集合有供其等一體化之程度之大量之熔融樹脂，故而於非彈性纖維34自伸長狀態恢復成非伸長狀態之過程中，於使其端部維持球狀之狀態下熔融樹脂固化，形成上述球狀之端部34a。如此，藉 由熔斷而產生之多根非彈性纖維34各者之端部成為球狀之端部34a，結果，於側封部4之外側端面40形成球體密集區域35。 It is estimated that the spherical end portion 34a (see FIGS. 11 and 12) of the inelastic fiber 34 is formed as follows under the condition that the stretch sheet 30 (the diaper continuous body 10) is melted in an extended state. For example, in the case where the side seal portion forming portion 4' in the stretched state sheet is irradiated with the laser light and is blown, the sheets 31, 32 which are produced by the fuse immediately after the end of the fuse are used. The end portions of the plurality of constituent fibers (non-elastic fibers 34) of the sheets 31 and 32 in the cut edge portion are in a molten state in which the resin component is melted, and the molten resin is spherical due to surface tension. Further, after the fusing, the sheets 31 and 32 are released from the stretched state and returned to the non-stretched state (natural state), so that the spherical end portions of the plurality of inelastic fibers 34 of the sheets 31 and 32 are respectively In addition to the application of the surface tension, a force which is restored to the non-stretched state is applied, whereby the molten resin is collected at the end portion and becomes a larger spherical shape. Here, when a large amount of molten resin is collected in the spherical end portion of each of the plurality of inelastic fibers 34, the spherical end portions are integrated to form a block (resin block) of a resin having an indefinite shape, but the distribution is due to the distribution. The effect of the elongation of the plurality of elastic wires 33 on the cut edge portions of the sheets 31 and 32 does not have a large amount of molten resin to the extent that they are integrated at the end portions of the respective inelastic fibers 34. In the process in which the inelastic fibers 34 return to the non-stretched state from the expanded state, the molten resin is solidified in a state in which the ends thereof are maintained in a spherical shape, and the spherical end portions 34a are formed. So, borrow The end portion of each of the plurality of inelastic fibers 34 which are formed by the fuse is a spherical end portion 34a, and as a result, the spherical dense region 35 is formed on the outer end surface 40 of the side seal portion 4.

相對於此，若未使伸縮片材30(尿布連續體10)伸長地於非伸長狀態(自然狀態)下進行熔斷，則藉由熔斷而產生之多根非彈性纖維34之端部分別因熔融樹脂之表面張力而暫時成為球狀，但由於該片材30成為非伸長狀態而彈性絲33之伸長力未發揮作用，故而大量熔融樹脂集合於該等多個球狀之端部，其結果，該等端部一體化而成為不定形狀之樹脂塊，於該塊狀態下，熔融樹脂固化而形成側封部。存在於如此形成之側封部之外側端面之樹脂塊之體積小於熔融前之樹脂之表觀體積，故而彈性絲33之端部容易自該外側端面突出至尿布外側，因此，有側封部之肌膚觸感變得刺痛之虞。 On the other hand, if the stretch sheet 30 (the diaper continuous body 10) is not stretched in a non-stretched state (natural state), the ends of the plurality of inelastic fibers 34 which are generated by the melting are melted, respectively. The surface tension of the resin is temporarily spherical. However, since the sheet 30 is in a non-stretched state and the elongation of the elastic yarn 33 does not function, a large amount of molten resin is collected at the ends of the plurality of spherical shapes. As a result, The end portions are integrated into a resin block of an indefinite shape, and in this block state, the molten resin is solidified to form a side seal portion. The volume of the resin block existing on the outer end surface of the side seal portion thus formed is smaller than the apparent volume of the resin before melting, so that the end portion of the elastic yarn 33 easily protrudes from the outer end surface to the outer side of the diaper, and therefore, the side seal portion The touch of the skin becomes stinging.

又，於尿布連續體10之熔斷中，除將尿布連續體10於沿其伸縮片材30之伸縮方向伸長之狀態下熔斷以外，亦重要的是將尿布連續體10、尤其是其熔斷預定部位(側封部形成預定部位4')之周邊部於朝厚度方向加壓(壓縮)之狀態下熔斷(例如照射雷射光)。藉由將加壓狀態之尿布連續體10熔斷，藉由該熔斷而產生之複數片片材31、32之切斷緣部彼此更進一步確實地熔接，結果，側封部4之熔接強度提高。就提高側封部4之熔接強度之觀點而言，尿布連續體10之加壓(壓縮)較佳為不僅於熔斷中(例如雷射光之照射中)進行，亦於該熔斷之前後進行。尿布連續體10之加壓方法並無特別限制，例如可列舉如下方法等：將尿布連續體10以特定之張力捲繞於圓筒狀、平板狀等特定形狀之支持構件，於維持該張力之狀態下在該支持構件上進行熔斷；或利用該支持構件與其他構件(擠壓構件)夾持尿布連續體10。 Further, in the fusing of the diaper continuous body 10, in addition to fusing the diaper continuous body 10 in a state of being stretched in the direction in which the stretchable sheet member 30 is stretched, it is also important that the diaper continuous body 10, particularly the portion to be blown, is blown. The peripheral portion of the side seal portion forming predetermined portion 4' is blown (for example, irradiated with laser light) in a state of being pressurized (compressed) in the thickness direction. By squeezing the diaper continuous body 10 in a pressurized state, the cut edge portions of the plurality of sheets 31 and 32 which are generated by the fusion are more reliably welded to each other, and as a result, the welding strength of the side seal portion 4 is improved. From the viewpoint of improving the welding strength of the side seal portion 4, the pressurization (compression) of the diaper continuous body 10 is preferably performed not only in the fusing (for example, in the irradiation of laser light) but also before and after the fusing. The method of pressurizing the diaper continuous body 10 is not particularly limited, and examples thereof include a method in which the diaper continuous body 10 is wound around a support member having a specific shape such as a cylindrical shape or a flat shape under a specific tension to maintain the tension. The support member is blown in a state; or the diaper continuous body 10 is held by the support member and other members (squeeze members).

以上，將本發明(第2發明)基於其較佳之實施態樣進行了說明，但本發明並不限定於上述實施態樣。例如於上述實施態樣中，外裝體包含1片伸縮片材，但亦可包含伸縮片材與其他片材之積層構造。此 情形時，例如可將外裝體之非肌膚對向面側設為伸縮片材，將肌膚對向面側(吸收性本體之固定面側)設為非伸縮片材。又，對於上述實施態樣中之外裝體3，亦可與此種褲型拋棄式尿布中之外裝體同樣地配置腰圍皺褶形成用彈性構件、腿部皺褶形成用彈性構件。 As described above, the present invention (second invention) has been described based on preferred embodiments, but the present invention is not limited to the above embodiment. For example, in the above embodiment, the outer casing includes one stretch sheet, but may also include a laminated structure of the stretch sheet and the other sheet. this In the case of the case, for example, the non-skin facing surface side of the outer casing may be a stretch sheet, and the skin facing surface side (the fixed surface side of the absorbent body) may be a non-stretch sheet. In the outer casing 3 of the above-described embodiment, the elastic member for forming the waist wrinkles and the elastic member for forming the leg gathers may be disposed in the same manner as the outer casing of the pant-type disposable diaper.

關於上述本發明之實施態樣，進而揭示以下之附記。 With regard to the above-described embodiments of the present invention, the following supplementary notes will be further disclosed.

<1>一種褲型拋棄式尿布，其包含：吸收性本體；及外裝體，其配置於該吸收性本體之非肌膚對向面側並將該吸收性本體固定；且腹側部中之該外裝體之兩側緣部與背側部中之該外裝體之兩側緣部接合而形成有一對側封部、腰部開口部及一對腿部開口部；上述外裝體係包含伸縮片材而構成，該伸縮片材包含彈性纖維及非彈性纖維；上述側封部係由上述腹側部中之上述外裝體之兩側緣部與上述背側部中之上述外裝體之兩側緣部以合掌狀態熔接而構成，於該熔接部內存在上述彈性纖維；且於上述側封部之外側端面，上述彈性纖維之端部未較其周邊部更向外側突出。 <1> A pants-type disposable diaper comprising: an absorbent body; and an exterior body disposed on a non-skin opposing side of the absorbent body and fixing the absorbent body; and in the ventral portion a pair of side seal portions, a waist opening portion, and a pair of leg opening portions are formed by joining both side edges of the outer casing to the side edges of the outer casing in the back side portion; the outer casing system includes expansion and contraction a stretched sheet comprising elastic fibers and inelastic fibers; wherein the side seal portion is formed by both side edges of the outer casing and the outer casing of the back side portion in the front side portion The both side edges are welded together in a palm-like state, and the elastic fibers are present in the welded portion; and the end portions of the elastic fibers are not protruded outward from the peripheral portions on the outer end faces of the side seal portions.

<2>如上述<1>之褲型拋棄式尿布，其中上述側封部之厚度較佳為0.2mm以上，進而較佳為0.25mm以上。 <2> The pants-type disposable diaper according to the above <1>, wherein the thickness of the side seal portion is preferably 0.2 mm or more, and more preferably 0.25 mm or more.

<3>如上述<1>或<2>之褲型拋棄式尿布，其中上述側封部之厚度較佳為2mm以下，進而較佳為1.5mm以下。 <3> The pants-type disposable diaper according to the above <1> or <2>, wherein the thickness of the side seal portion is preferably 2 mm or less, and more preferably 1.5 mm or less.

<4>如上述<1>至<3>中任一項之褲型拋棄式尿布，其中上述外裝體係包含上述伸縮片材與不含彈性纖維之非伸縮片材之積層體而構 成，上述側封部之厚度大於構成其之上述腹側部及上述背側部各者之除該側封部以外之部分之厚度，於上述側封部之外側端面，形成有該外側端面平滑之平滑區域。 The pants-type disposable diaper according to any one of the above-mentioned items, wherein the outer casing system comprises a laminate of the above-mentioned elastic sheet and a non-elastic sheet containing no elastic fibers. The thickness of the side seal portion is larger than a thickness of a portion other than the side seal portion of each of the front side portion and the back side portion of the side seal portion, and the outer end surface is formed smooth at an outer end surface of the side seal portion. Smooth area.

<5>如上述<4>之褲型拋棄式尿布，其中上述平滑區域係形成於上述側封部之外側端面之整個區域，該外側端面之整個區域存在因上述外裝體之構成纖維(構成纖維之端部)所產生之微細之凹凸而不平坦，但平滑。 <5> The pants-type disposable diaper according to the above <4>, wherein the smoothing region is formed over the entire area of the outer end surface of the side seal portion, and the entire outer peripheral end surface has fibers constituting the outer body The fine concavities and convexities generated by the ends of the fibers are not flat but smooth.

<6>如上述<4>或<5>之褲型拋棄式尿布，其中上述非伸縮片材係由1種特定材料形成，或包含佔該非伸縮片材之全部形成材料之90質量%以上的1種特定材料。 (6) The pants-type disposable diaper according to the above <4>, wherein the non-elastic sheet is formed of one specific material or contains 90% by mass or more of all the forming materials of the non-stretch sheet. 1 specific material.

<7>如上述<5>之褲型拋棄式尿布，其中上述非伸縮片材僅由聚丙烯形成，或聚丙烯佔該非伸縮片材之全部形成材料之90質量%以上。 <7> The pants-type disposable diaper according to the above <5>, wherein the non-stretch sheet is formed only of polypropylene, or the polypropylene accounts for 90% by mass or more of all the forming materials of the non-stretch sheet.

<8>如上述<4>至<7>中任一項之褲型拋棄式尿布，其中於上述側封部之厚度方向之中央部存在上述非伸縮片材，隔著該非伸縮片材於該厚度方向之兩側存在上述伸縮片材。 The pants-type disposable diaper of any one of the above-mentioned <4>, wherein the non-elastic sheet is present in a central portion in the thickness direction of the side seal portion, and the non-elastic sheet is interposed therebetween. The above-mentioned stretch sheet is present on both sides in the thickness direction.

<9>如上述<4>至<7>中任一項之褲型拋棄式尿布，其中於上述側封部之厚度方向之中央部存在上述伸縮片材，隔著該伸縮片材於該厚度方向之兩側存在上述非伸縮片材。 The pants-type disposable diaper according to any one of the above-mentioned <4>, wherein the stretchable sheet is present in a central portion in the thickness direction of the side seal portion, and the stretch sheet is interposed therebetween. The above non-stretch sheet is present on both sides of the direction.

<10> 如上述<4>至<9>中任一項之褲型拋棄式尿布，其中上述非伸縮片材於縱方向或橫方向不具有伸縮性，或於兩方向之任一者均不具有伸縮性。 <10> The pants-type disposable diaper according to any one of the above-mentioned items, wherein the non-elastic sheet has no stretchability in the longitudinal direction or the transverse direction, or has no stretchability in either of the directions. .

<11>如上述<1>至<10>中任一項之褲型拋棄式尿布，其中上述伸縮片材中所包含之上述彈性纖維為線狀之彈性絲，上述伸縮片材具有於以上述非彈性纖維為主體之可伸長之纖維層之一面接合有上述彈性絲之構成，且於上述外裝體中之除上述側封部以外之部分中，該非彈性纖維之一部分與該彈性絲熔接而埋沒於該彈性絲中，於上述平滑區域內存在上述彈性絲之端部。 The pants-type disposable diaper according to any one of the above-mentioned items, wherein the elastic fiber included in the stretchable sheet is a linear elastic yarn, and the stretchable sheet has the above-mentioned elastic sheet a portion of the extensible fiber layer in which the inelastic fiber is a main body is joined to the elastic yarn, and in a portion other than the side seal portion of the outer casing, a portion of the inelastic fiber is welded to the elastic yarn. Buried in the elastic yarn, the end portion of the elastic yarn is present in the smooth region.

<12>如上述<11>之褲型拋棄式尿布，其中於上述纖維層與接合於其之上述彈性絲之間不存在接著劑。 <12> The pants-type disposable diaper according to the above <11>, wherein an adhesive agent is not present between the fiber layer and the elastic yarn bonded thereto.

<13>如上述<11>或<12>之褲型拋棄式尿布，其中上述伸縮片材包含外層片材及內層片材之2片片材作為上述纖維層，該等2片片材藉由該纖維層之構成纖維自身之伸長，可於與上述彈性絲延伸之方向(橫方向)相同之方向伸長。 <13> The pants-type disposable diaper according to the above <11>, wherein the stretchable sheet comprises two sheets of the outer layer sheet and the inner layer sheet as the fiber layer, and the two sheets are borrowed The elongation of the fibers constituting the fiber layer itself can be elongated in the same direction as the direction in which the elastic wires extend (lateral direction).

<14>如上述<11>至<13>中任一項之褲型拋棄式尿布，其中藉由上述纖維層之構成纖維自身之伸長，該纖維層可於與上述彈性絲延伸之方向(橫方向)相同之方向伸長。 The pants-type disposable diaper according to any one of the above-mentioned <11>, wherein the fiber layer is stretchable in the direction of the elastic yarn by the elongation of the constituent fibers of the fiber layer. The direction is elongated in the same direction.

<15>如上述<11>至<14>中任一項之褲型拋棄式尿布，其中上述伸縮片材包含外層片材及內層片材之2片片材作為上述纖維層，即便該 纖維層之構成纖維自身不伸長，該等2片片材亦可藉由如下方式於與上述彈性絲延伸之方向(橫方向)相同之方向伸長，即：1)於交點結合之纖維彼此分離；2)根據纖維彼此之結合而由複數根纖維所形成之立體構造於構造上發生變化；或3)構成纖維斷裂。 The pants-type disposable diaper according to any one of the above-mentioned, wherein the stretch sheet comprises two sheets of the outer layer sheet and the inner layer sheet as the fiber layer, even if The constituent fibers of the fiber layer are not elongated by themselves, and the two sheets may be elongated in the same direction as the direction in which the elastic filaments extend (lateral direction), that is, 1) the fibers bonded at the intersection are separated from each other; 2) The three-dimensional structure formed by the plurality of fibers varies depending on the combination of the fibers with each other; or 3) the fiber is broken.

<16>如上述<11>至<15>中任一項之褲型拋棄式尿布，其中上述彈性絲實質上以非伸長狀態與上述纖維層接合。 The pants-type disposable diaper of any one of the above-mentioned <11>, wherein the elastic yarn is substantially joined to the fiber layer in a non-stretched state.

<17>如上述<11>至<14>中任一項之褲型拋棄式尿布，其中上述彈性絲係由彈性樹脂於熔融或軟化之狀態下延伸而形成者。 The pant-type disposable diaper of any one of the above-mentioned <11>, wherein the elastic yarn is formed by extending an elastic resin in a molten or softened state.

<18>如上述<11>至<17>中任一項之褲型拋棄式尿布，其中存在於上述平滑區域之上述彈性絲係於上述尿布之穿著中發揮收縮力。 The pants-type disposable diaper of any one of the above-mentioned <11>, wherein the elastic yarn present in the smooth region exerts a contracting force in the wearing of the diaper.

<19>如上述<11>至<18>中任一項之褲型拋棄式尿布，其中上述纖維層藉由熱處理、輥間延伸、利用齒槽或齒輪之咬合延伸或利用拉幅機之拉伸延伸而形成為可伸長。 The pants-type disposable diaper of any one of the above-mentioned <11>, wherein the fiber layer is stretched by heat treatment, stretching between rolls, by occlusion of a tooth gap or a gear, or by a tenter. Stretching and extending to form an extensible.

<20>如上述<11>至<19>中任一項之褲型拋棄式尿布，其中上述彈性絲之直徑較佳為10μm以上，進而較佳為20μm以上。 The pants-type disposable diaper of any one of the above-mentioned <11>, wherein the diameter of the elastic yarn is preferably 10 μm or more, and more preferably 20 μm or more.

<21>如上述<11>至<20>中任一項之褲型拋棄式尿布，其中上述彈性絲之直徑較佳為200μm以下，進而較佳為130μm以下。 The pants-type disposable diaper according to any one of the above-mentioned items, wherein the diameter of the elastic yarn is preferably 200 μm or less, and more preferably 130 μm or less.

<22>如上述<11>至<21>中任一項之褲型拋棄式尿布，其中相鄰之上述彈性絲之間距(相鄰之彈性絲之中心間之距離)較佳為0.1mm以 上，進而較佳為0.4mm以上。 The pants-type disposable diaper of any one of the above-mentioned <11> to <21>, wherein the distance between the adjacent elastic yarns (the distance between the centers of the adjacent elastic yarns) is preferably 0.1 mm. Further, it is preferably 0.4 mm or more.

<23>如上述<11>至<22>中任一項之褲型拋棄式尿布，其中相鄰之上述彈性絲之間距(相鄰之彈性絲之中心間之距離)較佳為5mm以下，進而較佳為1mm以下。 The pant-type disposable diaper of any one of the above-mentioned <11>, wherein the distance between the adjacent elastic wires (the distance between the centers of adjacent elastic wires) is preferably 5 mm or less. More preferably, it is 1 mm or less.

<24>如上述<1>至<10>中任一項之褲型拋棄式尿布，其中於上述伸縮片材中混合有上述彈性纖維與上述非彈性纖維。 The pants-type disposable diaper of any one of the above-mentioned <1> to <10>, wherein the elastic fiber and the non-elastic fiber are mixed in the above-mentioned stretch sheet.

<25>如上述<24>之褲型拋棄式尿布，其中上述彈性纖維係由包含熱塑性聚胺基甲酸酯彈性體之聚合物所形成之纖維。 <25> The pants-type disposable diaper according to the above <24>, wherein the elastic fibers are fibers formed of a polymer comprising a thermoplastic polyurethane elastomer.

<26>如上述<1>至<25>中任一項之褲型拋棄式尿布，其中於上述側封部之外側端面，形成有複數個上述非彈性纖維之球狀之端部密集而形成之球體密集區域。 The pants-type disposable diaper according to any one of the above-mentioned <1>, wherein the spherical end portions of the plurality of non-elastic fibers are formed densely on the outer end surface of the side seal portion. The dense area of the sphere.

<27>如上述<26>之褲型拋棄式尿布，其中於上述球體密集區域中，鄰接之上述球狀之端部彼此相互接合成為一體，而形成熔接部。 <27> The pants-type disposable diaper according to the above <26>, wherein in the spherical dense region, the adjacent spherical end portions are joined to each other to form a welded portion.

<28>如上述<26>或<27>之褲型拋棄式尿布，其中形成上述側封部之外側端面之上述球體密集區域之外表面係由多個上述球狀之端部之大致半球狀之前端部於面方向相連而形成，成為微細之凹凸連續之凹凸面。 The diaper-type disposable diaper of the above-mentioned <26> or <27>, wherein the outer surface of the spherical dense region forming the outer end surface of the side seal portion is substantially hemispherical in shape from the plurality of spherical end portions The front end portions are formed by being connected in the plane direction, and are formed into irregular concavities and convexities of fine concavities and convexities.

<29>如上述<1>至<28>中任一項之褲型拋棄式尿布，其中上述側封部係經過將尿布連續體於沿該尿布連續體中之上述伸縮片材之伸縮 方向伸長之狀態下熔斷的步驟而形成，上述尿布連續體係使包含上述腹側部之複數個前身片於一方向(搬送方向)相連而形成之前身片連續體與包含上述背側部之複數個後身片於一方向(搬送方向)相連而形成之後身片連續體重疊而獲得。 The pant-type disposable diaper according to any one of the above-mentioned <1>, wherein the side seal portion is stretched by stretching the diaper continuous body to the stretchable sheet in the diaper continuous body. Formed in the step of extruding in a state in which the diaper continuous system connects a plurality of front body sheets including the front side portion in one direction (transport direction) to form a plurality of front body continuous bodies and a plurality of the back side portions The back body pieces are connected in one direction (transport direction) to be formed by overlapping the body pieces after the body pieces are formed.

<30>如上述<1>至<28>中任一項之褲型拋棄式尿布，其中上述側封部係經過將尿布連續體不伸長而熔斷之步驟而形成，上述尿布連續體係使包含上述腹側部之複數個前身片於一方向(搬送方向)相連而形成之前身片連續體與包含上述背側部之複數個後身片於一方向(搬送方向)相連而形成之後身片連續體重疊而獲得。 The pants-type disposable diaper according to any one of the above-mentioned items, wherein the side seal portion is formed by a step of blowing the diaper continuous body without being stretched, and the diaper continuous system comprises the above The plurality of front body pieces of the abdominal side portion are connected in one direction (transport direction) to form a front body piece continuous body and a plurality of back body pieces including the back side portion are connected in one direction (transport direction) to form a body piece continuous body Obtained by overlapping.

<31>如上述<1>至<30>中任一項之褲型拋棄式尿布，其中上述側封部之剝離強度較佳為10N以上，進而較佳為13N以上。 The pant-type disposable diaper according to any one of the above aspects, wherein the side seal portion preferably has a peel strength of 10 N or more, more preferably 13 N or more.

<32>如上述<1>至<31>中任一項之褲型拋棄式尿布，其中上述側封部之剝離強度較佳為75N以下，進而較佳為70N以下。 The pant type disposable diaper according to any one of the above aspects, wherein the side seal portion preferably has a peel strength of 75 N or less, more preferably 70 N or less.

<33>如上述<30>之褲型拋棄式尿布，其中使用雷射光作為熔斷手段，對上述尿布連續體中之上述側封部之形成預定部位照射雷射光而將其熔斷，藉此形成該側封部。 <33> The pants-type disposable diaper according to the above <30>, wherein the laser beam is irradiated to a predetermined portion of the side seal portion in the diaper continuous body by using laser light as a fuse means, thereby forming the Side seals.

<34>一種褲型拋棄式尿布之製造方法，其係如上述<1>至<28>中任一項之褲型拋棄式尿布之製造方法，且包括如下步驟：使包含上述腹側部之前身片連續體與包含上述背側部之後身片連續體重疊而獲得尿布連續體，於使該尿布連續體沿該尿布連續體中之上述伸縮片材之伸縮方向伸長之狀態下，將該尿布連續體中之上述側封部之形成預定 部位熔斷而形成該側封部。 The method for producing a pant-type disposable diaper according to any one of the above-mentioned items <1> to <28>, comprising the step of: before the ventral side portion is included The body continuous body and the body piece including the back side portion are overlapped to obtain a diaper continuous body, and the diaper continuous body is stretched in a direction in which the stretchable sheet in the diaper continuous body is stretched in a direction in which the diaper is stretched. Forming the above-mentioned side seal portion in the continuous body The portion is melted to form the side seal portion.

<35>一種褲型拋棄式尿布之製造方法，其係如上述<1>至<28>中任一項之褲型拋棄式尿布之製造方法，且包括如下步驟：使包含上述腹側部之前身片連續體與包含上述背側部之後身片連續體重疊而獲得尿布連續體，不使該尿布連續體伸長地將該尿布連續體中之上述側封部之形成預定部位熔斷而形成該側封部。 A method of manufacturing a pant-type disposable diaper according to any one of the above-mentioned items <1> to <28>, comprising the step of: before the ventral side portion is included The body continuous body is overlapped with the body portion including the back side portion to obtain a diaper continuous body, and the predetermined portion of the side seal portion in the diaper continuous body is melted without forming the diaper continuous body to form the side. Seal.

<36>如上述<34>或<35>之褲型拋棄式尿布之製造方法，其中使用雷射光作為熔斷手段，對上述尿布連續體中之上述側封部之形成預定部位照射雷射光而將其熔斷。 <36> The method for producing a pants-type disposable diaper according to the above <34>, wherein the laser beam is used as a fusing means, and the predetermined portion of the side seal portion in the diaper continuous body is irradiated with laser light. It is blown.

<37>如上述<34>至<36>中任一項之褲型拋棄式尿布之製造方法，其中上述纖維層藉由熱處理、輥間延伸、利用齒槽或齒輪之咬合延伸或利用拉幅機之拉伸延伸而形成為可伸長。 The method for producing a pant-type disposable diaper according to any one of the above-mentioned items, wherein the fiber layer is stretched by heat treatment, stretching between rolls, by occlusion of a tooth gap or a gear, or by using a tenter The machine is stretched and stretched to form an extensible.

<38>如上述<34>至<37>中任一項之褲型拋棄式尿布之製造方法，其中上述纖維層於與上述彈性絲接合之前之原片之狀態下無法伸長。 The method for producing a pant-type disposable diaper according to any one of the above aspects, wherein the fiber layer is not stretchable in a state of the original sheet before the elastic yarn is joined.

<39>如上述<29>或<30>之褲型拋棄式尿布，其中於上述尿布連續體之熔斷中，將其熔斷預定部位(側封部形成預定部位)之周邊部於沿厚度方向加壓(壓縮)之狀態下熔斷(例如照射雷射光)。 The diaper-type disposable diaper of the above-mentioned <29> or <30>, wherein in the continuation of the diaper continuous body, the peripheral portion of the predetermined portion (the predetermined portion where the side seal portion is formed) is melted in the thickness direction. It is blown under pressure (compression) (for example, irradiating laser light).

<40>一種褲型拋棄式尿布之製造方法，其係如上述<1>至<3>、<11>至<23>或<26>至<29>中任一項之褲型拋棄式尿布之製造 方法，且包括如下步驟：使包含上述腹側部之複數個前身片於一方向(搬送方向)相連而形成之前身片連續體與包含上述背側部之複數個後身片於一方向(搬送方向)相連而形成之後身片連續體重疊而獲得尿布連續體，於使該尿布連續體沿該尿布連續體中之上述伸縮片材之伸縮方向伸長之狀態下，將該尿布連續體中之上述側封部之形成預定部位熔斷而形成該側封部。 <40> A trouser-type disposable diaper according to any one of the above <1> to <3>, <11> to <23> or <26> to <29> Manufacturing The method includes the steps of: connecting a plurality of front body pieces including the ventral side portion in one direction (transport direction) to form a front body piece continuous body and a plurality of back body pieces including the back side portion in one direction (transport) The continuum is formed so as to be continuous, and the continuum of the diaper is obtained to obtain the continuum of the diaper. The diaper continuous body is stretched in the direction of expansion and contraction of the stretchable sheet in the diaper continuous body. The formation portion of the side seal portion is melted to form the side seal portion.

<41>如上述<40>之褲型拋棄式尿布之製造方法，其中使用雷射光作為上述尿布連續體之熔斷手段，對上述側封部之形成預定部位照射雷射光而將其熔斷。 <41> The method for producing a pants-type disposable diaper according to the above <40>, wherein laser light is used as a means for breaking the diaper continuous body, and a predetermined portion of the side seal portion is irradiated with laser light to be melted.

<42>如上述<40>或<41>之褲型拋棄式尿布之製造方法，其中於上述尿布連續體之熔斷中，將其熔斷預定部位(側封部形成預定部位)之周邊部於沿厚度方向加壓(壓縮)之狀態下進行熔斷(例如照射雷射光)。 The method of manufacturing a trouser-type disposable diaper according to the above <40>, wherein the diaper continuous body is fused to a peripheral portion of the predetermined portion (the side seal portion is formed at a predetermined portion) The fuse is blown (for example, irradiated with laser light) in a state where the thickness direction is pressurized (compressed).

<43>如上述<34>至<42>中任一項之褲型拋棄式尿布之製造方法，其中上述纖維層藉由熱處理、輥間延伸、利用齒槽或齒輪之咬合延伸或利用拉幅機之拉伸延伸而形成為可伸長。 The method for producing a pants-type disposable diaper according to any one of the above-mentioned items, wherein the fiber layer is stretched by heat treatment, stretching between rolls, by occlusion of a tooth gap or a gear, or by using a tenter The machine is stretched and stretched to form an extensible.

<44>如上述<34>至<43>中任一項之褲型拋棄式尿布之製造方法，其中上述纖維層於與上述彈性絲接合之前之原片之狀態下無法伸長。 The method for producing a pant-type disposable diaper according to any one of the above-mentioned, wherein the fiber layer is not stretchable in a state of the original sheet before the elastic yarn is joined.

<45>如上述<34>至<44>中任一項之褲型拋棄式尿布之製造方法，其中上述彈性絲係由彈性樹脂於熔融或軟化之狀態下延伸而形成 者。 The method for producing a pants-type disposable diaper according to any one of the above-mentioned, wherein the elastic yarn is formed by extending an elastic resin in a molten or softened state. By.

實施例 Example

以下，藉由實施例進而具體地說明本發明(第1發明)，但本發明並不限定於該實施例。 Hereinafter, the present invention (first invention) will be specifically described by way of examples, but the present invention is not limited to the examples.

[實施例A1] [Example A1]

按照圖6所示之製造方法，製作具有與圖1~圖3所示之尿布1相同之基本構成之褲型拋棄式尿布。使用市售之褲型拋棄式尿布(花王製造之商品名為「超薄型活力紙尿褲」)之吸收性本體作為吸收性本體，使用與圖4所示之伸縮片材30相同之構成之下述伸縮片材A作為構成外裝體之伸縮片材，使用包含PP之單一纖維之基重為18g/m2之紡黏不織布作為非伸縮片材，製成自尿布之肌膚對向面側依序為伸縮片材A(最內層)、非伸縮片材(中間層)及伸縮片材A(最外層)之3層構造。於實施例A1之尿布之製造中，使用雷射光作為尿布連續體之熔斷手段，於使該尿布連續體沿該尿布連續體中之下述伸縮片材A之伸縮方向伸長之狀態下，對該尿布連續體中之側封部之形成預定部位照射雷射光而將其熔斷，藉此形成側封部。雷射光之照射係使用與專利文獻3中所記載之雷射式接合裝置相同之構成之裝置而進行。作為雷射光，使用CO2雷射，設為雷射輸出24W、點直徑0.3mm、掃描速度90mm/s，將能量密度D設為0.89J/mm2。能量密度D(單位：J/mm2)係將所照射之雷射光之能量除以照射區域之面積所得之值，藉由下述式(1)而算出。式(1)中，P為雷射輸出(W)，為被熔斷片材(尿布連續體)中之雷射光之點之直徑(mm)，v為雷射光之掃描速度(mm/s)。 According to the manufacturing method shown in Fig. 6, a pants-type disposable diaper having the same basic configuration as that of the diaper 1 shown in Figs. 1 to 3 was produced. The absorbent body of the commercially available pant-type disposable diaper (trade name "Ultra-thin vibrating diaper" manufactured by Kao) is used as the absorbent body, and the same configuration as that of the stretchable sheet 30 shown in Fig. 4 is used. The stretch sheet A is used as a stretch sheet constituting the outer body, and a spunbond nonwoven fabric having a basis weight of 18 g/m 2 of a single fiber containing PP is used as a non-stretch sheet, and is formed on the opposite side of the skin from the diaper. It is a three-layer structure of the stretch sheet A (the innermost layer), the non-stretch sheet (the intermediate layer), and the stretch sheet A (the outermost layer). In the manufacture of the diaper of the embodiment A1, laser light is used as a means for breaking the diaper continuous body, and the diaper continuous body is stretched along the expansion and contraction direction of the following stretchable sheet A in the diaper continuous body. The predetermined portion where the side seal portion is formed in the diaper continuous body is irradiated with laser light to be melted, thereby forming a side seal portion. The irradiation of the laser light is performed using a device having the same configuration as that of the laser-type bonding device described in Patent Document 3. As the laser light, a CO 2 laser was used, and a laser output of 24 W, a dot diameter of 0.3 mm, a scanning speed of 90 mm/s, and an energy density D of 0.89 J/mm 2 were used . The energy density D (unit: J/mm 2 ) is a value obtained by dividing the energy of the irradiated laser light by the area of the irradiation region, and is calculated by the following formula (1). In equation (1), P is the laser output (W), The diameter (mm) of the point of the laser light to be blown in the sheet (the diaper continuum), and v is the scanning speed (mm/s) of the laser light.

<伸縮片材A> <Flexible sheet A>

按照圖7所示之製造方法，製造於包含非彈性纖維(非彈性纖維之含有率為100質量%)之2片同類之纖維層間夾持有彈性絲之構成之伸縮片材A。於製造伸縮片材A時，如圖7所示，使於2片片材間夾持有彈性絲之複合體通過包含如一對齒槽輥64、65般之於周向(實際長度方向)交替地形成有齒與齒底之一對齒槽輥的彈性顯現處理裝置(延伸裝置)，藉此對該複合體賦予伸縮性，獲得伸縮片材A。於伸縮片材A，多根彈性絲以特定之間隔相互平行地配置。 According to the manufacturing method shown in FIG. 7, the stretchable sheet A in which the elastic fibers are sandwiched between the two fiber layers of the same type including the inelastic fibers (the content of the non-elastic fibers is 100% by mass) is produced. When manufacturing the stretch sheet A, as shown in Fig. 7, the composite body in which the elastic yarn is sandwiched between the two sheets is alternated in the circumferential direction (actual length direction) by including, for example, a pair of grooved rolls 64, 65. An elastic expression processing device (extension device) having one of the teeth and the tooth bottom pair of the toothed rolls is formed, whereby the composite body is provided with stretchability, and the stretch sheet A is obtained. In the stretch sheet A, a plurality of elastic yarns are arranged in parallel with each other at a specific interval.

．彈性絲：苯乙烯系之熱塑性彈性體，纖維直徑為110μm . Elastic yarn: styrene-based thermoplastic elastomer with a fiber diameter of 110 μm

．彈性絲之基重：10g/m2 . Basis weight of elastic yarn: 10g/m 2

．纖維層：包含PP之單一纖維(非彈性纖維，纖維粗度為3.5dtex)之基重為18g/m2之紡黏不織布 . Fiber layer: a spunbond non-woven fabric having a basis weight of 18 g/m 2 of a single fiber (non-elastic fiber, fiber thickness 3.5 dtex) containing PP

．伸縮片材A之基重：46g/m2 . The basis weight of the stretch sheet A: 46g/m 2

[實施例A2] [Example A2]

除代替伸縮片材A而使用下述伸縮片材B以外，以與實施例A1相同之方式製作褲型拋棄式尿布。再者，於實施例A2之尿布之製造中，於將下述伸縮片材B摺疊而使其重疊時(製造尿布連續體10時)，使包含PP作為非彈性纖維之纖維層(下述「一纖維層」)彼此重疊。 A pants-type disposable diaper was produced in the same manner as in Example A1 except that the stretch sheet B described below was used instead of the stretch sheet A. Further, in the manufacture of the diaper of the embodiment A2, when the stretchable sheet B described below is folded and overlapped (when the diaper continuous body 10 is produced), the fiber layer containing PP as the inelastic fiber is formed (hereinafter " A fibrous layer") overlaps each other.

<伸縮片材B> <Flexible sheet B>

按照圖7所示之製造方法，製造於包含非彈性纖維(非彈性纖維之含有率為100質量%)之2片不同類之纖維層間夾持有彈性絲之構成之伸縮片材B。於製造伸縮片材B時，如圖7所示，使於2片片材間夾持有彈性絲之複合體通過包含如一對齒槽輥64、65般之於周向(實際長度方向)交替地形成有齒與齒底之一對齒槽輥的彈性顯現處理裝置(延伸裝置)，藉此對該複合體賦予伸縮性，獲得伸縮片材B。於伸縮片材 B，多根彈性絲以特定之間隔相互平行地配置。 According to the manufacturing method shown in FIG. 7, the stretchable sheet B which consists of an elastic yarn is hold|maintained between the two fiber types which comprise the non-elastic fiber (The content rate of the non-elastic fiber is 100 mass%. When manufacturing the stretch sheet B, as shown in Fig. 7, the composite body in which the elastic yarn is sandwiched between the two sheets is alternated in the circumferential direction (actual length direction) by including, for example, a pair of cogging rollers 64, 65. An elastic expression processing device (extension device) having one of the teeth and the tooth bottom pair of the toothed rolls is formed, whereby the composite body is provided with stretchability, and the stretch sheet B is obtained. Retractable sheet B. A plurality of elastic filaments are arranged in parallel with each other at a specific interval.

．彈性絲：苯乙烯系之熱塑性彈性體，纖維直徑為110μm . Elastic yarn: styrene-based thermoplastic elastomer with a fiber diameter of 110 μm

．彈性絲之基重：10g/m2 . Basis weight of elastic yarn: 10g/m 2

．一纖維層：包含PP之單一纖維(非彈性纖維，纖維粗度為3.5dtex)之基重為18g/m2之紡黏不織布 . A fibrous layer: a spunbonded nonwoven fabric having a basis weight of 18 g/m 2 of a single fiber (non-elastic fiber, fiber thickness of 3.5 dtex) containing PP

．另一纖維層：包含PET(芯)/PE(鞘)之芯鞘型複合纖維(非彈性纖維，纖維粗度為3.0dtex)之基重20g/m2之熱風不織布。 . Another fiber layer: a core-sheath type composite fiber (non-elastic fiber having a fiber thickness of 3.0 dtex) containing PET (core) / PE (sheath), and a hot air non-woven fabric having a basis weight of 20 g/m 2 .

．伸縮片材B之基重：48g/m2 . The basis weight of the stretch sheet B: 48g/m 2

[實施例A3] [Example A3]

除代替伸縮片材A而使用下述伸縮片材C以外，以與實施例A1相同之方式製作褲型拋棄式尿布。 A pants-type disposable diaper was produced in the same manner as in Example A1 except that the stretch sheet C described below was used instead of the stretch sheet A.

<伸縮片材C> <Flexible sheet C>

對UNICHARM公司製造之商品名為「LIFREE安心舒薄吸水內褲」之位於最外層之片材賦予乾燥機之熱，使熱熔膠一面熔解一面剝落而獲得伸縮片材C。 The outermost sheet of the product name "LIFREE" is manufactured by UNICHARM, and the heat is applied to the outermost sheet to cause the hot melt adhesive to peel off while being melted to obtain the stretchable sheet C.

[比較例A1] [Comparative Example A1]

除僅使用伸縮片材作為外裝體之構成構件而未使用非伸縮片材以外，以與實施例A1相同之方式製作褲型拋棄式尿布。 A pants-type disposable diaper was produced in the same manner as in Example A1 except that only the stretch sheet was used as the constituent member of the exterior body and the non-stretch sheet was not used.

[比較例A2] [Comparative Example A2]

除代替伸縮片材A而使用伸縮片材B以外，以與比較例A1相同之方式製作褲型拋棄式尿布。 A pants-type disposable diaper was produced in the same manner as in Comparative Example A1 except that the stretch sheet B was used instead of the stretch sheet A.

[比較例A3] [Comparative Example A3]

除代替伸縮片材A而使用伸縮片材C以外，以與比較例A1相同之方式製作褲型拋棄式尿布。 A pants-type disposable diaper was produced in the same manner as in Comparative Example A1 except that the stretch sheet C was used instead of the stretch sheet A.

[比較例A4] [Comparative Example A4]

於尿布之製造中，代替使用有雷射光之熔斷，而採用使用加熱 加壓機構(熱軋裝置)之熱封及該熱封部(被加壓部)之藉由切斷機構之物理性之切斷，藉由該等方法形成側封部，除此以外，以與實施例A1相同之方式製作褲型拋棄式尿布。 In the manufacture of diapers, instead of using the melting of laser light, the use of heating The heat sealing of the pressurizing mechanism (hot rolling device) and the physical sealing of the heat sealing portion (pressed portion) by the cutting mechanism, and the side seal portions are formed by these methods, and A pants-type disposable diaper was produced in the same manner as in Example A1.

[評估] [assessment]

關於各實施例及比較例之尿布，藉由上述方法評估側封部之剝離強度，藉由下述方法評估觸感。將其結果示於下述表1中。 With respect to the diapers of the respective examples and comparative examples, the peel strength of the side seal portions was evaluated by the above method, and the tactile sensation was evaluated by the following method. The results are shown in Table 1 below.

[側封部之觸感] [Touch of the side seals]

請5名官能檢查員以食指觸碰評估對象之尿布之側封部之外側端面，並基於下述評估基準評估此時之感覺。關於下述評估基準中之「刺痛」係如下所述。將5名官能檢查員之平均分設為該尿布之評估結果。 The five inspectors were asked to touch the outer end surface of the side seal portion of the diaper of the evaluation object with the index finger, and the feeling at this time was evaluated based on the following evaluation criteria. The "stinging" in the following evaluation criteria is as follows. The average score of the five functional inspectors was set as the evaluation result of the diaper.

<側封部之觸感之評估基準> <Evaluation criteria for the tactile sensation of the side seals>

5分：不刺痛。 5 points: no stinging.

4分：不太刺痛。 4 points: Not too stinging.

3分：模棱兩可。 3 points: ambiguous.

2分：稍稍刺痛。 2 points: Slightly stinging.

1分：刺痛。 1 point: Stinging.

如由表1所明確般，各實施例中側封部之剝離強度較大且具有實用上充分之密封強度，且側封部之刺痛感較小，觸感良好。可推測出於各實施例之側封部之外側端面，於其大致整個區域形成有該外側端面平滑之平滑區域。相對於此，比較例A1~A3中任一者均為外裝體僅包含伸縮片材而構成，而不包含非伸縮片材，故而成為如下結果：與外裝體包含非伸縮片材而構成之各實施例相比，側封部之剝離強度變差。可推測出於比較例A1~A3之側封部之外側端面，未形成有上述平滑區域。又，比較例A4中，由於側封部經加熱壓縮而形成，故而側封部之厚度小於構成其之腹側部及背側部各者之除該側封部以外之部分之厚度(非側封部厚度)，因此，側封部之前端銳利，故而觸碰時之刺痛感較大，成為如下結果：與側封部之厚度大於非側封部厚度之各實施例相比，側封部之觸感變差。 As is clear from Table 1, in each of the examples, the side seal portion had a large peeling strength and a practically sufficient sealing strength, and the side seal portion had a small tingling feeling and a good touch. It is presumed that the outer end surface of the side seal portion of each of the embodiments has a smooth region in which the outer end surface is smooth over substantially the entire area. On the other hand, in any of the comparative examples A1 to A3, the outer casing includes only the elastic sheet, and does not include the non-stretch sheet. Therefore, the outer casing includes the non-stretch sheet. In comparison with the respective examples, the peel strength of the side seal portion was deteriorated. It is presumed that the smoothed regions were not formed in the outer end faces of the side seal portions of Comparative Examples A1 to A3. Further, in Comparative Example A4, since the side seal portion was formed by heating and compression, the thickness of the side seal portion was smaller than the thickness of the portion other than the side seal portion of each of the front side portion and the back side portion constituting the same (non-side) Since the thickness of the seal portion is sharp, the front end portion of the side seal portion is sharp, so that the tingling feeling at the time of the touch is large, and the result is as follows: the side seal is compared with each of the embodiments in which the thickness of the side seal portion is larger than the thickness of the non-side seal portion. The touch of the department is getting worse.

以下，藉由實施例進一步具體地說明本發明(第2發明)，但本發明並不限定於該實施例。 Hereinafter, the present invention (second invention) will be specifically described by way of examples, but the present invention is not limited to the examples.

[實施例B1] [Example B1]

按照圖13所示之製造方法，製作具有與圖8~圖10所示之尿布1A相同之基本構成之褲型拋棄式尿布。使用市售之褲型拋棄式尿布(花王製造之商品名為「超薄型活力紙尿褲」)之吸收性本體作為吸收性本體，使用與圖4所示之伸縮片材30相同之構成之上述伸縮片材A作為構成外裝體之伸縮片材。於實施例B1之尿布之製造中，使用雷射光作為尿布連續體之熔斷手段，於使該尿布連續體沿該尿布連續體中之下述伸縮片材A之伸縮方向伸長之狀態下，對該尿布連續體中之側封部之形成預定部位照射雷射光而將其熔斷，藉此形成側封部。雷射光之照射係使用與專利文獻3中所記載之雷射式接合裝置相同之構成之裝置而進行。作為雷射光，使用CO2雷射，設為雷射輸出24W、點直徑0.3mm、掃描速度90mm/s，能量密度D係設為0.89J/mm2。能量 密度D(單位：J/mm2)係將所照射之雷射光之能量除以照射區域之面積所得之值，藉由上述式(1)而算出。 According to the manufacturing method shown in Fig. 13, a pants-type disposable diaper having the same basic configuration as that of the diaper 1A shown in Figs. 8 to 10 was produced. The absorbent body of the commercially available pant-type disposable diaper (trade name "Ultra-thin viable diaper" manufactured by Kao) is used as the absorbent body, and the above-described expansion and contraction of the same configuration as that of the stretchable sheet 30 shown in Fig. 4 is used. The sheet A serves as a stretch sheet constituting the outer casing. In the manufacture of the diaper of Example B1, laser light is used as a means for breaking the diaper continuous body, and the diaper continuous body is stretched in the direction in which the stretchable sheet A of the diaper continuous body is stretched in the direction of expansion and contraction The predetermined portion where the side seal portion is formed in the diaper continuous body is irradiated with laser light to be melted, thereby forming a side seal portion. The irradiation of the laser light is performed using a device having the same configuration as that of the laser-type bonding device described in Patent Document 3. As the laser light, a CO 2 laser was used, and a laser output of 24 W, a dot diameter of 0.3 mm, a scanning speed of 90 mm/s, and an energy density D of 0.89 J/mm 2 were used . The energy density D (unit: J/mm 2 ) is a value obtained by dividing the energy of the irradiated laser light by the area of the irradiation region, and is calculated by the above formula (1).

實施例B2] Example B2]

除代替伸縮片材A而使用上述伸縮片材B以外，以與實施例B1相同之方式製作褲型拋棄式尿布。再者，於實施例B2之尿布之製造中，於將上述伸縮片材B摺疊而使其重疊時(製造尿布連續體時)，使包含PP作為非彈性纖維之纖維層(前述「一纖維層」)彼此重疊。 A pants-type disposable diaper was produced in the same manner as in Example B1 except that the above-mentioned stretch sheet B was used instead of the stretch sheet A. Further, in the manufacture of the diaper of the embodiment B2, when the stretchable sheet B is folded and overlapped (when a diaper continuous body is produced), a fiber layer containing PP as an inelastic fiber (the aforementioned "one fiber layer" is used. ") overlap each other.

[比較例B1] [Comparative Example B1]

於在尿布之製造中使用雷射光將尿布連續體熔斷時，未使該尿布連續體伸長而於非伸長狀態下進行熔斷，除此以外，以與實施例B1相同之方式製作褲型拋棄式尿布。 In the same manner as in Example B1, a pant-type disposable diaper was produced in the same manner as in Example B1, except that the diaper continuous body was melted by using laser light in the manufacture of the diaper, and the diaper continuous body was not stretched in a non-stretched state. .

[比較例B2] [Comparative Example B2]

於在尿布之製造中使用雷射光將尿布連續體熔斷時，未使該尿布連續體伸長而於非伸長狀態下進行熔斷，除此以外，以與實施例B2相同之方式製作褲型拋棄式尿布。 In the same manner as in Example B2, a pants-type disposable diaper was produced in the same manner as in Example B2, except that the diaper continuous body was melted by using laser light in the manufacture of the diaper, and the diaper continuous body was not stretched in a non-stretched state. .

[側封部之觸感評估] [Tactile evaluation of side seals]

請5名官能檢查員以食指觸碰各實施例及比較例之尿布之側封部之外側端面，並基於上述<側封部之觸感之評估基準>評估此時之感覺。將5名官能檢查員之平均分設為該尿布之評估結果。其結果，實施例B1為2.9分，實施例B2為3.0分，任一者側封部之刺痛感均較小，相對於此，比較例B1為1.1分，比較例B2為1.4分，任一者側封部之刺痛感均較大。可推測出由於在各實施例之尿布之製造中將伸長狀態之尿布連續體熔斷而形成側封部，故而成為如下結果：於側封部之外側端面之整個區域形成有上述球體密集區域，藉此，刺痛感較小。相對於此，可推測出由於各比較例之尿布係將非伸長狀態之尿布連續體熔斷而形成側封部，故而於側封部之外側端面未形成有球體密集區域， 故而側封部之刺痛感較大。 The five inspectors touched the outer end faces of the side seal portions of the diapers of the respective examples and the comparative examples with the index finger, and evaluated the feeling at this time based on the above-mentioned "evaluation criteria of the tactile sensation of the side seal portions". The average score of the five functional inspectors was set as the evaluation result of the diaper. As a result, Example B1 was 2.9 points, and Example B2 was 3.0 minutes. The flank feeling of the side seal portion was small, and Comparative Example B1 was 1.1 points, and Comparative Example B2 was 1.4 points. The tingling sensation of one side seal is larger. It is presumed that the diaper continuous body in the stretched state is formed by melting the diaper continuous body in the manufacture of the diaper of each embodiment, and as a result, the spherical dense region is formed over the entire outer end surface of the side seal portion. Therefore, the tingling is less. On the other hand, it is presumed that the diaper of each comparative example fuses the diaper continuous body in a non-stretched state to form a side seal portion, so that a spherical dense region is not formed on the outer end surface of the side seal portion. Therefore, the side seal has a greater tingling sensation.

[產業上之可利用性] [Industrial availability]

根據本發明(第1發明)，提供一種褲型拋棄式尿布，其具有如內褲般之外觀，且即便觸碰到側封部亦不刺痛而不易感到疼痛，於脫下時容易於側封部撕開。於本說明書中，「刺痛」之感覺意指於以手指觸碰突起物時通常所感受到之感覺(疼痛)，例如為以指尖觸碰較指尖更小之物體或具有尖端部之物體之該尖端部時之感覺(疼痛)。於褲型拋棄式尿布之側封部中，作為可能成為此種刺痛感之原因之「突起物」，例如可列舉藉由熔融而凝固並硬化之樹脂、與熱熔融同時地被壓縮而成為突起狀之樹脂、將該等樹脂銳利地切斷而相對較尖之突起狀之樹脂等。 According to the present invention (first invention), there is provided a pant-type disposable diaper which has a pant-like appearance and which does not tingle and feel pain even when it touches the side seal portion, and is easy to be side-sealed when taken off. The part is torn open. In this specification, the feeling of "stinging" means the feeling (pain) that is usually felt when a finger is touched by a finger, for example, an object that is smaller than a fingertip with a fingertip or an object having a tip end. The feeling (pain) at the tip end. In the side seal portion of the pants-type disposable diaper, as the "protrusion" which may cause such a tingling sensation, for example, a resin which is solidified and hardened by melting is compressed and melted simultaneously with heat fusion. A resin having a protrusion shape, a resin having a relatively sharp protrusion, and the like, which are sharply cut.

又，根據本發明(第2發明)，提供一種雖然包含側封部但具有如內褲般之外觀，且即便觸碰到側封部亦不刺痛而不易感到疼痛之褲型拋棄式尿布。 Further, according to the present invention (second invention), there is provided a pant type disposable diaper which has an outer appearance like a panty portion and which has an outer appearance like a pant and which does not cause tingling even if it touches the side seal portion.

Claims (13)

一種褲型拋棄式尿布，其包含：吸收性本體；及外裝體，其配置於該吸收性本體之非肌膚對向面側並將該吸收性本體固定；且腹側部中之該外裝體之兩側緣部與背側部中之該外裝體之兩側緣部接合而形成有一對側封部、腰部開口部及一對腿部開口部；上述外裝體係包含伸縮片材而構成，該伸縮片材包含彈性纖維及非彈性纖維；上述側封部係由上述腹側部中之上述外裝體之兩側緣部與上述背側部中之上述外裝體之兩側緣部以合掌狀態熔接而構成，且具有熔接部，於該熔接部內存在上述彈性纖維；且於上述側封部之外側端面，上述彈性纖維之端部未較其周邊部更向外側突出；上述外裝體係包含上述伸縮片材與不含彈性纖維之非伸縮片材之積層體而構成，上述側封部之厚度與構成該側封部之上述腹側部及上述背側部各者之除該側封部以外之部分之厚度相比較大，於上述側封部之外側端面，形成有該外側端面平滑之平滑區域；上述伸縮片材中所包含之上述彈性纖維為線狀之彈性絲，上述伸縮片材具有於以上述非彈性纖維為主體之可伸長之纖維層之一面接合有上述彈性絲之構成，於上述外裝體中之除上述側封部以外之部分，該非彈性纖維之一部分與該彈性絲熔接而埋沒於該彈性絲中，於上述平滑區域內存在上述彈性絲之端部。 a pant-type disposable diaper comprising: an absorbent body; and an exterior body disposed on a non-skin facing side of the absorbent body and fixing the absorbent body; and the exterior of the ventral portion a pair of side seal portions, a waist opening portion, and a pair of leg opening portions are formed by joining the both side edges of the body and the side edges of the outer casing in the back side portion; the outer casing system includes the elastic sheet The elastic sheet and the non-elastic fiber; the side seal portion is formed by the both side edges of the outer casing in the front side portion and the side edges of the outer casing in the back side portion The elastic fiber is formed in the welded portion, and the elastic fiber is present in the welded portion; and the end portion of the elastic fiber is not protruded outward from the peripheral portion on the outer end surface of the side seal portion; The mounting system includes a laminate of the above-mentioned elastic sheet and a non-elastic sheet containing no elastic fibers, and the thickness of the side seal portion and each of the front side portion and the back side portion constituting the side seal portion Thickness of the portion other than the side seal a smoother region in which the outer end surface is smooth is formed on the outer end surface of the side seal portion; the elastic fiber included in the elastic sheet is a linear elastic yarn, and the elastic sheet has the above-mentioned inelastic a structure in which one of the extensible fiber layers of the main body of the fiber is joined to the elastic yarn, and a portion of the inelastic fiber other than the side seal portion is welded to the elastic yarn to be buried in the elastic portion In the filament, the end portion of the elastic yarn is present in the smooth region. 如請求項1之褲型拋棄式尿布，其中上述非伸縮片材係由1種特定材料形成，或包含佔該非伸縮片材之全部形成材料之90質量%以上之1種特定材料。 The pants-type disposable diaper according to claim 1, wherein the non-elastic sheet is formed of one specific material or contains one specific material of 90% by mass or more of all the forming materials of the non-stretch sheet. 如請求項1或2之褲型拋棄式尿布，其中於上述側封部之厚度方向之中央部存在上述非伸縮片材，隔著該非伸縮片材於該厚度方向之兩側存在上述伸縮片材。 The pants-type disposable diaper according to claim 1 or 2, wherein the non-stretch sheet is present in a central portion in a thickness direction of the side seal portion, and the stretch sheet is present on both sides of the non-elastic sheet in the thickness direction . 如請求項1或2之褲型拋棄式尿布，其中於上述側封部之厚度方向之中央部存在上述伸縮片材，隔著該伸縮片材於該厚度方向之兩側存在上述非伸縮片材。 The diaper-type disposable diaper according to claim 1 or 2, wherein the stretchable sheet is present in a central portion in a thickness direction of the side seal portion, and the non-retractable sheet is present on both sides of the elastic sheet via the stretch sheet . 如請求項1之褲型拋棄式尿布，其中於上述纖維層與接合於其之上述彈性絲之間不存在接著劑。 The pant-type disposable diaper of claim 1, wherein no adhesive is present between the fibrous layer and the elastic yarn bonded thereto. 如請求項1之褲型拋棄式尿布，其中於上述伸縮片材中混合有上述彈性纖維與上述非彈性纖維。 The pants-type disposable diaper according to claim 1, wherein the elastic fiber and the non-elastic fiber are mixed in the stretch sheet. 如請求項6之褲型拋棄式尿布，其中上述彈性纖維為由包含熱塑性聚胺基甲酸酯彈性體之聚合物所形成之纖維。 The pant-type disposable diaper of claim 6, wherein the elastic fiber is a fiber formed of a polymer comprising a thermoplastic polyurethane elastomer. 如請求項1或5之褲型拋棄式尿布，其中上述側封部係經過將尿布連續體於沿該尿布連續體中之上述伸縮片材之伸縮方向伸長之狀態下熔斷的步驟而形成，上述尿布連續體係使包含上述腹側部之複數個前身片於一方向相連而形成之前身片連續體與包含上述背側部之複數個後身片於一方向相連而形成之後身片連續體重疊而獲得。 The pants-type disposable diaper according to claim 1 or 5, wherein the side seal portion is formed by a step of blowing a diaper continuous body in a state in which the stretchable sheet in the diaper continuous body is stretched in a direction in which the stretchable sheet is stretched, wherein The diaper continuous system connects a plurality of front body pieces including the ventral side portion in one direction to form a front body piece continuous body and a plurality of back body pieces including the back side portion are connected in one direction to form a body piece continuous body overlapping obtain. 如請求項1之褲型拋棄式尿布，其中上述側封部係經過將尿布連續體不伸長而熔斷之步驟而形成，上述尿布連續體係使包含上述腹側部之複數個前身片於一方向相連而形成之前身片連續體與包含上述背側部之複數個後身片於一方向相連而形成之後身片連續體重疊而獲得。 The pant-type disposable diaper according to claim 1, wherein the side seal portion is formed by a step of fusing the diaper continuous body without elongation, the diaper continuous system connecting the plurality of front body pieces including the ventral side portion in one direction The formation of the front body continuous body and the plurality of back body pieces including the back side portion are connected in one direction to form a body piece continuous body overlap. 如請求項9之褲型拋棄式尿布，其中使用雷射光作為熔斷手段，對上述尿布連續體中之上述側封部之形成預定部位照射雷射光而將其熔斷，藉此形成該側封部。 The pant-type disposable diaper according to claim 9, wherein the laser beam is irradiated to the predetermined portion of the side seal portion in the diaper continuous body by a laser beam, and the side seal portion is formed by irradiating the laser beam with a predetermined portion. 一種褲型拋棄式尿布，其包含：吸收性本體；及外裝體，其配置於該吸收性本體之非肌膚對向面側並將該吸收性本體固定；且腹側部中之該外裝體之兩側緣部與背側部中之該外裝體之兩側緣部接合而形成有一對側封部、腰部開口部及一對腿部開口部；上述外裝體係包含伸縮片材而構成，該伸縮片材包含彈性纖維及非彈性纖維；上述側封部係由上述腹側部中之上述外裝體之兩側緣部與上述背側部中之上述外裝體之兩側緣部以合掌狀態熔接而構成，且具有熔接部，於該熔接部內存在上述彈性纖維；且於上述側封部之外側端面，上述彈性纖維之端部未較其周邊部更向外側突出；於上述側封部之外側端面形成有由複數根上述非彈性纖維之球狀之端部密集而形成之球體密集區域。 a pant-type disposable diaper comprising: an absorbent body; and an exterior body disposed on a non-skin facing side of the absorbent body and fixing the absorbent body; and the exterior of the ventral portion a pair of side seal portions, a waist opening portion, and a pair of leg opening portions are formed by joining the both side edges of the body and the side edges of the outer casing in the back side portion; the outer casing system includes the elastic sheet The elastic sheet and the non-elastic fiber; the side seal portion is formed by the both side edges of the outer casing in the front side portion and the side edges of the outer casing in the back side portion The elastic fiber is formed in the welded portion, and the elastic fiber is present in the welded portion; and the end portion of the elastic fiber is not protruded outward from the peripheral portion on the outer end surface of the side seal portion; The outer end surface of the side seal portion is formed with a spherical dense region formed by a plurality of spherical end portions of the inelastic fibers. 一種褲型拋棄式尿布之製造方法，其係如請求項1、5及11中任一項之褲型拋棄式尿布之製造方法，且包括如下步驟：使包含上述腹側部之複數個前身片於一方向相連而形成之前身片連續體與包含上述背側部之複數個後身片於一方向相連而形成之後身片連續體重疊而獲得尿布連續體，於使該尿布連續體沿該尿布連續體中之上述伸縮片材之伸縮方向伸長之狀態下，將該尿布連續體中之上述側封部之形成預定部位熔斷而形成該側封部。 A method of manufacturing a pant-type disposable diaper according to any one of claims 1, 5, and 11, and comprising the steps of: making a plurality of precursor pieces including the ventral portion The diaper continuous body and the plurality of back body pieces including the back side portion are connected in one direction to form a rear body continuous body to obtain a diaper continuous body, so that the diaper continuous body is along the diaper In a state where the stretchable sheet in the continuous body is stretched in the stretch direction, the predetermined portion of the side seal portion in the diaper continuous body is melted to form the side seal portion. 如請求項12之褲型拋棄式尿布之製造方法，其中使用雷射光作 為上述尿布連續體之熔斷手段，對上述側封部之形成預定部位照射雷射光而將其熔斷。 A method of manufacturing a pant-type disposable diaper according to claim 12, wherein the laser light is used In the diaper continuous body blowing means, the predetermined portion where the side seal portion is formed is irradiated with laser light and is melted.
TW103122156A 2013-06-28 2014-06-26 Pants type disposable diaper and manufacturing method thereof TWI619480B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909804A (en) * 1986-04-28 1990-03-20 Douglas Sr Herman Child's toilet training pants
JP2010111058A (en) * 2008-11-07 2010-05-20 Kao Corp Retractility composite sheet
JP2010142499A (en) * 2008-12-19 2010-07-01 Livedo Corporation Pants-type disposable diaper and method of manufacturing the same
JP2010188629A (en) * 2009-02-18 2010-09-02 Kao Corp Method of manufacturing sheet fused body, and laser type joining device
CN102939064A (en) * 2010-06-11 2013-02-20 尤妮佳股份有限公司 Disposable garment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909804A (en) * 1986-04-28 1990-03-20 Douglas Sr Herman Child's toilet training pants
JP2010111058A (en) * 2008-11-07 2010-05-20 Kao Corp Retractility composite sheet
JP2010142499A (en) * 2008-12-19 2010-07-01 Livedo Corporation Pants-type disposable diaper and method of manufacturing the same
JP2010188629A (en) * 2009-02-18 2010-09-02 Kao Corp Method of manufacturing sheet fused body, and laser type joining device
CN102939064A (en) * 2010-06-11 2013-02-20 尤妮佳股份有限公司 Disposable garment

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