WO2017002554A1 - 不織布及びそれを用いた吸収性物品 - Google Patents
不織布及びそれを用いた吸収性物品 Download PDFInfo
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- WO2017002554A1 WO2017002554A1 PCT/JP2016/066957 JP2016066957W WO2017002554A1 WO 2017002554 A1 WO2017002554 A1 WO 2017002554A1 JP 2016066957 W JP2016066957 W JP 2016066957W WO 2017002554 A1 WO2017002554 A1 WO 2017002554A1
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- WIPO (PCT)
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- top surface
- nonwoven fabric
- fiber density
- woven fabric
- convex portion
- Prior art date
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
- D10B2509/02—Bandages, dressings or absorbent pads
- D10B2509/026—Absorbent pads; Tampons; Laundry; Towels
Definitions
- the planar shape of the top face of the top face is circular.
- Another aspect (aspect 6) of the present invention is an absorbent article comprising the nonwoven fabric of any of the above-mentioned aspects 1-5.
- the disposable diaper 1 comprises a liquid-permeable top sheet 2 'made of the nonwoven fabric 2 according to an embodiment of the present invention, a liquid-impermeable back sheet 3, and these sheets.
- An opening 51 is formed substantially at the center of the cover sheet 5 provided on the surface of the surface sheet 2 ′ on the skin surface side, and a part of the surface sheet 2 ′ (one of the arrangement regions of the absorber 4 is provided.
- the surface sheet 2 has a first surface 2a opposite to the skin surface of the wearer and a base 22 having a second surface 2b opposite to the first surface 2a and extending in a substantially flat shape;
- the non-woven fabric 2 is provided with a plurality of convex portions 21 projecting in the thickness direction DT from the first surface 2 a of the base 22, and the machine direction (MD direction) of the non-woven fabric 2 is the longitudinal direction of the disposable diaper 1 as will be parallel to the D L, it is disposed on the skin surface side of the absorbent body 4.
- the nonwoven fabric 2 has a rectangular planar shape that is long in the MD direction, and when applied to the disposable diaper 1, the longitudinal direction of the nonwoven fabric 2 and a width direction orthogonal with the longitudinal and plan view, so that each becomes parallel to the longitudinal direction D L and the width direction D W of the disposable diaper 1 is placed on the skin surface side of the absorbent body 4.
- the longitudinal direction and the width direction of the non-woven fabric 2 are respectively described in the same manner as the disposable diaper 1.
- the circumferential surface portion 21W of the convex portion 21 is a portion corresponding to the side surface of the substantially cylindrical convex portion 21, and stands up in the thickness direction DT from the first surface 2a of the base 22 spreading flatly. And has a substantially cylindrical structure extending in the thickness direction DT , and is connected to the top surface portion 21T at an end edge opposite to the base portion 22. And in this embodiment, although the angle (henceforth "a standing angle") which the 1st surface 2a of the said base 22 and the outer surface of the said peripheral surface part make is shown in FIG. 4, it is about 90 degrees.
- the present invention is not limited to such an angle, and the rising angle may be an angle larger than 90 ° or an angle smaller than 90 °.
- the circumferential surface portion can support the top surface portion more firmly if the erection angle is an angle exceeding 90 °, so that the convex portion can be more difficult to be crushed.
- the convex portion is easily deformed in the surface direction of the non-woven fabric, so that pressure is applied in the surface direction of the non-woven fabric (for example, the skin surface along the surface of the non-woven fabric Even when moving, etc.) can provide a good touch.
- the portion of the circumferential surface portion connected to the top surface peripheral portion (particularly the thickest portion) of the top surface portion Since the thickness is thick and the elasticity and flexibility of the portion become high, the crushing (deformation) of the top surface portion can be restored more reliably.
- the base is a portion having a first surface having the above-mentioned convex portion and a second surface opposite to the first surface, and extending in a substantially flat shape.
- the thickness of the base is not particularly limited as long as it does not inhibit good cushioning properties, flexibility, liquid permeability, and the like, and any thickness can be employed.
- any thickness can be employed.
- in the range of 0.10 mm to 10.0 mm, preferably 0.15 mm to 7.0 mm, and more preferably from the viewpoint of cushioning property, softness, touch, liquid return prevention property, liquid permeability, etc. of the non-woven fabric Is in the range of 0.20 mm to 5.0 mm.
- the fiber density of the said base is lower than the fiber density of the surrounding surface part of the said convex part.
- the fiber density of the base portion is lower than the fiber density of the peripheral surface portion of the convex portion, the pressure in the thickness direction applied from the first surface side of the convex portion is buffered by bending the base portion to the second surface side.
- the fiber density of the base is lower than the fiber density of the top surface of the convex portion.
- the fibers used for the non-woven fabric of the present invention are not particularly limited as long as they do not inhibit good cushioning properties and touch, but, for example, natural fibers such as wool and cotton; regenerated fibers such as rayon and acetate; Polyolefins such as polypropylene (PP); ethylene-vinyl acetate copolymer (EVA); ethylene-ethyl acrylate copolymer; ethylene-acrylic acid copolymer; ionomer; polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) ; Polyesters such as polylactic acid; synthetic fibers composed solely of thermoplastic resins such as polyamides such as nylon, or core-sheath type, side-by-side type composed of a plurality of types of these thermoplastic resins; Composite fibers such as molds can be mentioned.
- natural fibers such as wool and cotton
- regenerated fibers such as rayon and acetate
- Polyolefins such as poly
- these fibers is not particularly limited, and hollow fibers; modified cross-section fibers such as flat and Y-type; latent crimp type or manifest crimp type three-dimensional crimp fiber; water flow, heat, embossing Fibers in the form of divided fibers etc. that are divided by physical load such as processing can also be suitably used.
- These fibers may be subjected to a hydrophilization treatment.
- Each of the above-mentioned fibers may be used alone or in combination of two or more.
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Nonwoven Fabrics (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
Description
さらに、前記最厚部は、良好な弾力性及び柔軟性を有しているので、凸部が繊維密度の高い周面部を有していても、凸部の硬さが感取されにくく、良好な肌触りを提供ことができる。
また、本明細書において、幅方向DWは、展開した状態の使い捨ておむつ1(吸収性物品)において、平面視にて幅方向(短手方向)を指し、長手方向DLは、展開した状態の使い捨ておむつ1(吸収性物品)において、平面視にて長手方向(着用者の前後方向)を指し、厚さ方向DTは、展開した状態の使い捨ておむつ1(吸収性物品)における厚さ方向を指し、これらの幅方向DL、長手方向DL及び厚さ方向DTは、それぞれ互いに直交する関係にある。
図3及び図4に示すように、本実施形態の不織布2では、凸部21の頂面部21Tは、頂面の平面形状が円形である。頂面の平面形状がこのような円形であると、前記頂面部21Tが前記周面部21Wによって頂面周縁部分21Cに沿って均等に支持されるため、前記凸部21に(特に、前記頂面部21Tに)局所的に潰れやすい部分が形成されにくく、他の平面形状のもの比べて凸部21が潰れにくくなる。なお、本実施形態では、前記頂面の平面形状は、直径約10mmの円形であるが、本発明において、前記頂面のサイズは特に制限されず、所望の肌触りや強度、液の透過性等を考慮して任意のサイズを採用することができる。また、本明細書において、頂面周縁部分は、頂面の平面形状の輪郭に沿った周縁部分を意味する。
本実施形態において前記凸部21の周面部21Wは、略円柱状の凸部21の側面に対応する部分であって、平坦状に広がる基部22の第1面2aから厚さ方向DTに起立し、前記厚さ方向DTに延びる略筒状の構造を有していて、前記基部22と反対側の端縁において前記頂面部21Tと繋がっている。そして、本実施形態において、前記基部22の第1面2aと前記周面部の外表面とのなす角度(以下、「起立角」という。)は、図4に示すように略90°であるが、本発明においてはこのような角度に限定されず、前記起立角は、90°を超える角度であっても、90°未満の角度であってもよい。この起立角が、90°を超える角度であると、周面部が頂面部をより強固に支持することができるため、凸部をより潰れにくくすることができる。また、起立角が90°未満の角度であると、凸部が不織布の面方向に変形しやすくなるため、不織布の面方向に圧力が掛かるような場合(例えば、不織布の表面に沿って肌面が移動する場合等)でも、良好な肌触りを提供することができる。
本発明の不織布において、基部は、上述の凸部を有する第1面及び該第1面に相反する第2面を有し、且つ略平坦状に広がる部分である。前記基部の厚みは、良好なクッション性や柔軟性、液の透過性等を阻害しない限り特に限定されず、任意の厚みを採用することができる。不織布のクッション性や柔軟性、肌触り、液戻り防止性、液の透過性などの点から、例えば0.10mm~10.0mmの範囲内であり、好ましくは0.15mm~7.0mm、更に好ましくは0.20mm~5.0mmの範囲内である。
本発明において、不織布の坪量は、特に限定されないが、好ましくは10g/m2~100g/m2であり、更に好ましくは15g/m2~50g/m2である。坪量が10g/m2以上であると、不織布として十分な表面強度が得られるため、例えば、不織布を吸収性物品の表面シートに適用した場合に、吸収性物品の使用中に表面シートが破れにくい。また、坪量が100g/m2以下であると、ごわつき等が生じないため、例えば、不織布を吸収性物品の表面シートに適用した場合に、吸収性物品の使用中に、着用者に不快感や違和感が生じにくい。
1.3dtexの繊度を有し、PET/HDPEの芯鞘型複合繊維を開繊機にて開繊した後、カード機にて前記繊維のフォーミングを行った。フォーミングされたカードウェブをメッシュコンベアにより搬送し、サクションドラムの外周面に取り付けられたパターンプレート上に供給した。前記サクションドラムを回転させながら、前記サクションドラムの外周面に形成された吸引孔からの負圧によって、前記カードウェブを前記パターンプレートの貫通孔内に吸引するとともに、前記カードウェブに対し、サクションドラムの下方側に配置されたエアジェットノズルから、180℃の熱風を風速50.0m/秒で吹き付けることにより、前記カードウェブを前記パターンプレートに沿わせて、前記カードウェブに複数の凸部を賦形した。さらに、前記複数の凸部が賦形されたウェブを熱処理機に搬送して、温度135℃、風速0.9m/秒の温風条件下で熱処理を行った後、熱処理後のウェブを巻き取ることにより、実施例1の不織布を得た。なお、得られた不織布の坪量は25g/m2であった。
エアジェットノズルから吹き付ける熱風の温度及び風速を、それぞれ143℃及び29.2m/秒としたこと以外は、実施例1と同様にして比較例1の不織布を得た。なお、得られた不織布の坪量は25g/m2であった。
[繊維密度の測定方法]
走査型電子顕微鏡(例えば、KEYENCE社製「リアルサーフェスビュー顕微鏡 VE-7800」)を用いて、不織布の切断面を、該不織布の厚み方向における中点を観察の中心として拡大観察したとき(すなわち、繊維断面が20~70本程度観察できる程度の倍率であって、通常、20~100倍の倍率で観察したとき)の一定面積(2mm2程度)当たりの繊維の切断断面数を数える。数えた切断断面数を1mm2当たりの繊維の切断断面数に換算し、これを繊維密度(本/mm2)とする。なお、この繊維密度の測定は3箇所で行い、その平均値をサンプルの繊維密度とする。
複数の凸部を有する不織布を100mm×100mmの四角形にカットしたサンプルシートを、10枚用意する。用意した10枚のサンプルシートを重ねて、株式会社島津製作所製「オートグラフAGS-1kNG」の測定台にセットする。チャック間の距離:35mm、圧縮速度:25mm/分、最大荷重26Nの試験条件にて、1サイクルの圧縮試験を行う。サンプルシートが圧縮されて、チャック間の距離が縮まったときのサンプルシートの厚み(cm)を計測し、当該厚みをサンプルシートの坪量(g/cm2)で除することにより、サンプルシートの圧縮比容積(cm3/g)を得る。さらに、得られた圧縮比容積をサンプルシート内に存在する凸部の個数(個)で除した値を、複数の凸部を有する不織布の、凸部1個当たりの圧縮比容積(cm3/g/個)とする。
また、実施例1及び比較例1の各不織布における凸部の繊維密度と、凸部1個当たりの圧縮比容積の測定結果を表1に示す。
また、実施例1の不織布は、図10(a)及び(b)に示すように、凸部が基部の第1面から厚さ方向に起立する周面部と、前記凸部の頭頂を形成する頂面を有する頂面部とを備え、且つ前記頂面部の頂面周縁部分の一部が最厚部として構成された、特定の構造を有していて、凸部を有する表面の肌触りが良好であった。一方、比較例1の不織布は、図11に示すように、凸部が略半球状の構造を有していて、凸部を有する表面の肌触りが、前記凸部を感取しやすい肌触りであった。
2 不織布
2’ 表面シート
21 凸部
21T 頂面部
21W 周面部
21C 頂面周縁部分
21CM 最厚部
22 基部
3 裏面シート
4 吸収体
Claims (6)
- 互いに相反する第1面及び第2面を有し且つ平坦状に広がる基部と、前記基部の第1面から厚さ方向に突出する複数の凸部と、を備える不織布であって、
前記凸部は、前記基部の第1面から厚さ方向に起立する周面部と、前記凸部の頭頂を形成する頂面を有する頂面部と、を備えていて、
前記周面部の繊維密度が、前記頂面部の繊維密度よりも高く、
前記頂面部の頂面周縁部分の少なくとも一部が、前記不織布の中で最も厚い厚みを有する最厚部として構成されている、前記不織布。 - 前記周面部の繊維密度が前記基部の繊維密度よりも高い、請求項1に記載の不織布。
- 前記頂面部の頂面が窪んでいる、請求項1又は2に記載の不織布。
- 前記頂面部の頂面の平面形状が円形である、請求項1~3のいずれか一項に記載の不織布。
- 前記最厚部は、前記不織布の中で最も低い繊維密度を有している、請求項1~4のいずれか一項に記載の不織布。
- 請求項1~5のいずれか一項に記載の不織布を含む吸収性物品。
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CN201680029299.0A CN107614770B (zh) | 2015-06-30 | 2016-06-07 | 无纺织物以及利用该无纺织物的吸收性物品 |
EP16817663.4A EP3287554B1 (en) | 2015-06-30 | 2016-06-07 | Nonwoven fabric and absorbent article using same |
AU2016286566A AU2016286566B2 (en) | 2015-06-30 | 2016-06-07 | Nonwoven fabric and absorbent article using same |
US15/737,749 US20180177645A1 (en) | 2015-06-30 | 2016-06-07 | Nonwoven fabric and absorbent article using same |
KR1020177034327A KR20180035734A (ko) | 2015-06-30 | 2016-06-07 | 부직포 및 그것을 이용한 흡수성 물품 |
PH12017550147A PH12017550147A1 (en) | 2015-06-30 | 2017-12-21 | Nonwoven fabric and absorbent article using same |
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JP2015132160A JP6320349B2 (ja) | 2015-06-30 | 2015-06-30 | 不織布及びそれを用いた吸収性物品 |
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DE112018000617T5 (de) * | 2017-01-31 | 2019-11-07 | The Procter & Gamble Company | Geformte Vliesstoffe und diese enthaltende Artikel |
EP3645775B1 (en) | 2017-06-30 | 2021-07-21 | The Procter & Gamble Company | Method for making a shaped nonwoven |
WO2019005906A1 (en) | 2017-06-30 | 2019-01-03 | The Procter & Gamble Company | NON-WOVEN FABRIC |
JP6623206B2 (ja) * | 2017-12-26 | 2019-12-18 | 花王株式会社 | 不織布の製造方法 |
JP6623207B2 (ja) * | 2017-12-26 | 2019-12-18 | 花王株式会社 | 支持体および該支持体を用いた不織布の製造方法 |
DE112020001304T5 (de) * | 2019-03-18 | 2021-12-16 | The Procter & Gamble Company | Geformte vliese mit hoher visueller auflösung |
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- 2016-06-07 KR KR1020177034327A patent/KR20180035734A/ko unknown
- 2016-06-07 MY MYPI2017704429A patent/MY178461A/en unknown
- 2016-06-07 WO PCT/JP2016/066957 patent/WO2017002554A1/ja active Application Filing
- 2016-06-07 US US15/737,749 patent/US20180177645A1/en not_active Abandoned
- 2016-06-07 CN CN201680029299.0A patent/CN107614770B/zh active Active
- 2016-06-07 AU AU2016286566A patent/AU2016286566B2/en not_active Ceased
- 2016-06-07 EP EP16817663.4A patent/EP3287554B1/en active Active
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2017
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Also Published As
Publication number | Publication date |
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AU2016286566A1 (en) | 2017-12-14 |
JP6320349B2 (ja) | 2018-05-09 |
EP3287554B1 (en) | 2019-10-02 |
US20180177645A1 (en) | 2018-06-28 |
EP3287554A1 (en) | 2018-02-28 |
CN107614770A (zh) | 2018-01-19 |
KR20180035734A (ko) | 2018-04-06 |
MY178461A (en) | 2020-10-14 |
EP3287554A4 (en) | 2018-03-14 |
PH12017550147A1 (en) | 2018-07-09 |
JP2017014660A (ja) | 2017-01-19 |
CN107614770B (zh) | 2019-11-08 |
AU2016286566B2 (en) | 2020-01-16 |
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