CN118161346A - Sanitary napkin, sanitary napkin holder, and pants-type absorbent article - Google Patents
Sanitary napkin, sanitary napkin holder, and pants-type absorbent article Download PDFInfo
- Publication number
- CN118161346A CN118161346A CN202311569247.0A CN202311569247A CN118161346A CN 118161346 A CN118161346 A CN 118161346A CN 202311569247 A CN202311569247 A CN 202311569247A CN 118161346 A CN118161346 A CN 118161346A
- Authority
- CN
- China
- Prior art keywords
- sheet
- skin
- sanitary napkin
- low emissivity
- skin side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Landscapes
- Absorbent Articles And Supports Therefor (AREA)
Abstract
To provide a sanitary napkin, a sanitary napkin container, and a pants-type absorbent article which ensure the overall softness of the article and improve the effect of functional materials in a short time after wearing. A sanitary napkin (1) has an absorbent core (2) that absorbs liquid, a skin-side sheet (3) that is disposed on the skin side of the absorbent core (2) in the thickness direction, and a non-skin-side sheet (4) that is disposed on the non-skin side of the absorbent core (2) in the thickness direction, wherein a low-emissivity sheet (10) that has lower emissivity than the non-skin-side sheet (4) is provided between the skin-side sheet (3) and the non-skin-side sheet (4), a functional material (50) is provided on the skin side of the low-emissivity sheet (10) in the thickness direction, and an outer end (10 e) of the low-emissivity sheet (10) is positioned on the inner side of the outer end (1 e) of the sanitary napkin (1) in the width direction, and the low-emissivity sheet (10) and the functional material (50) have an overlapping portion when viewed in the thickness direction.
Description
Technical Field
The present invention relates to a sanitary napkin, a sanitary napkin holder, and an underpants type absorbent article.
Background
There are known an absorbent article having a heat-retaining effect obtained by a metal layer by disposing a metal layer on a part of the absorbent article, or an absorbent article provided with a material or a heat-sensitive agent or a cold-sensitive agent which causes a wearer to feel a stimulus when wearing the absorbent article, a heat-generating body, or the like.
For example, patent document 1 discloses the following absorbent article: a metal layer is disposed on at least a part of the skin-facing surface of the back sheet disposed on the non-skin-facing surface side of the absorber and on both or either of the skin-facing surfaces, and the skin-facing surface side of the back sheet is covered with a cover sheet.
Further, patent document 2 discloses the following absorbent article: a heating element is disposed between the front sheet and the back sheet and outside the region where the absorber is disposed in the longitudinal direction, and the back sheet has oxygen impermeability.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open publication No. 2014-180161
Patent document 2: japanese patent application laid-open No. 2012-75564
Disclosure of Invention
Problems to be solved by the invention
As in patent document 1, there is a product in which a metal layer is provided on a part of the backsheet to prevent a decrease in the temperature of body fluid after excretion, but it is difficult to achieve an appropriate heat sensation or cold sensation effect although moisture retention and heat retention can be performed only by providing the metal layer. In addition, in the sanitary napkin, since replacement after discharge is performed in preference to the effect of preventing a decrease in blood temperature or cold feeling after discharge, it is desirable that the sanitary napkin has the function of giving the best hot feeling or cold feeling in a period of time before discharge (i.e., at an early stage after wearing the sanitary napkin) than after discharge (discharge).
In patent document 2, the application of the oxygen impermeable sheet (made of alumina or the like) to the outermost part of the product suppresses the start of the exothermic reaction of the exothermic body before the wearer starts to wear, but most of the outermost part is a part in contact with the body, and when the sheet containing alumina or the like is used at such a position, there is a possibility that the rigidity becomes high and the wearer may feel a hardness.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a sanitary napkin which can ensure flexibility of the entire product and can improve the effect of a functional material in a short time after wearing.
Means for solving the problems
The main invention for achieving the above object is a sanitary napkin comprising: a liquid-absorbent core; a skin-side sheet disposed on the skin side of the absorbent core in the thickness direction; and a non-skin side sheet disposed on a non-skin side of the absorbent core in the thickness direction, wherein a low emissivity sheet having a lower emissivity than the non-skin side sheet is provided between the skin side sheet and the non-skin side sheet, a functional material is provided on the skin side of the low emissivity sheet in the thickness direction, and an outer end of the low emissivity sheet is positioned on an inner side than an outer end of the sanitary napkin in the width direction, and the low emissivity sheet and the functional material have an overlapping portion when viewed in the thickness direction.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, a sanitary napkin that ensures flexibility of the entire product and improves the effect of the functional material in a short time after wearing can be provided.
Drawings
Fig. 1 is a schematic plan view of the sanitary napkin 1 according to embodiment 1 as seen from the skin side.
Fig. 2 is a schematic plan view of the sanitary napkin 1 according to embodiment 1 as viewed from the non-skin side.
Fig. 3A is a schematic cross-sectional view taken along the line A-A of fig. 1, and fig. 3B is a schematic cross-sectional view taken along the line B-B of fig. 1.
Fig. 4 is a schematic cross-sectional view taken along line C-C of fig. 1.
Fig. 5 is a diagram showing a modification of the application position of the functional material 50.
Fig. 6A is a schematic perspective view of the sanitary napkin holder 80, and fig. 6B is a view of the sanitary napkin holder 80 in an unsealed state.
Fig. 7 is a schematic perspective view of the pants-type absorbent article 100 according to embodiment 2.
Fig. 8 is a plan view of the pants-type absorbent article 100 in the unfolded state.
Fig. 9 is a top view of the absorbent body 120.
Fig. 10 is a schematic cross-sectional view of the absorbent body 120 of fig. 9, looking A-A.
Fig. 11 shows a modification of the arrangement position of the low emissivity sheet 140 and the functional material 50' of embodiment 2.
Fig. 12 shows another modification of the arrangement position of the low emissivity sheet 140 and the functional material 50' according to embodiment 2.
Detailed Description
At least the following matters will be apparent from the description of the present specification and drawings.
Aspect 1 is a sanitary napkin including a longitudinal direction, a width direction, and a thickness direction intersecting each other, the sanitary napkin including: a liquid-absorbent core; a skin-side sheet disposed on the skin side of the absorbent core in the thickness direction; and a non-skin side sheet disposed on a non-skin side of the absorbent core in the thickness direction, wherein a low emissivity sheet having a lower emissivity than the non-skin side sheet is provided between the skin side sheet and the non-skin side sheet, a functional material is provided on the skin side of the low emissivity sheet in the thickness direction, and an outer end of the low emissivity sheet is positioned on an inner side than an outer end of the sanitary napkin in the width direction, and the low emissivity sheet and the functional material have an overlapping portion when viewed in the thickness direction.
According to the sanitary napkin of aspect 1, by providing the low emissivity sheet, heat dissipation from the body is less likely to escape to the non-skin side. As a result, the temperature between the body and the low emissivity sheet is brought close to the body temperature, and the skin surface is moisturized, so that pores are easily loosened. The functional material located closer to the skin than the low emissivity sheet is also easily volatilized by such heat and moisture preservation, and the functional material is easily permeated from the loosened pores to the inside of the skin. Thus, the effect of the functional material can be improved to the greatest extent in a short time after wearing. In addition, the outer end of the low emissivity sheet in the width direction is separated from the outer end of the sanitary towel in the width direction, which is easy to contact when the body is moved during wearing, so that the hardness of the outer end of the sanitary towel can be reduced, and the flexibility of the whole product can be ensured.
In the aspect 2, in the sanitary napkin according to the aspect 1, the maximum length of the absorbent core in the thickness direction is longer than the maximum length of the low emissivity sheet.
According to the sanitary napkin of aspect 2, since the heat-retaining and moisture-retaining effects can be expected from the constituent material of the absorbent core, as the thickness (length in the thickness direction) thereof becomes thicker, the heat which is difficult to escape to the outside of the sanitary napkin due to the low emissivity sheet can be retained accordingly, and the moisture-retaining effect can be easily achieved by making it difficult to escape.
In aspect 3, in the sanitary napkin according to aspect 1 or 2, at least a part of the low emissivity sheet is disposed on the skin side of the absorbent core in the thickness direction.
According to the sanitary napkin of aspect 3, the portion of the low emissivity sheet disposed closer to the skin than the absorbent core is closer to the skin, so that the body temperature can be efficiently reflected, the temperature between the body and the low emissivity sheet can be brought closer to the body temperature, and the humidity can be easily increased. Further, since the functional material is provided on the skin side of the sheet rather than the low emissivity sheet, the transfer of the functional material to the absorbent core can be prevented by the low emissivity sheet, and the effect of the functional material can be prevented from being reduced.
The sanitary napkin according to any one of aspects 1 to 3, wherein at least a part of the low emissivity sheet is disposed on the non-skin side of the absorbent core in the thickness direction.
According to the sanitary napkin of aspect 4, the absorbent core can be prevented from being degraded in absorption performance due to the low emissivity sheet, and the influence of external air can be reduced because the absorbent core is positioned on the non-skin side, so that the heat-retaining state in the sanitary napkin can be easily stabilized when worn.
Aspect 5 is the sanitary napkin according to any one of aspects 1 to 4, wherein the sanitary napkin has a pair of side sheets joined at least in part to the skin side sheet and arranged in pairs in the width direction, and the pair of side sheets are not provided with elastic members.
According to the sanitary napkin of aspect 5, since the side panels are further laminated on the both side portions of the sanitary napkin, the matching properties of the both side portions are improved according to the thickness thereof. Further, since the elastic member is not present in the side sheet, the low emissivity sheet can be held flat without shrinking, and the uncomfortable feeling that is easily caused by shrinkage of the low emissivity sheet (which is easily a high rigidity portion) can be reduced.
In aspect 6, in the sanitary napkin according to any one of aspects 1 to 5, when a front side is set as a side that is a wearer's abdomen side and a rear side is set as a side that is a wearer's back side during wearing, at least a part of the low emissivity sheet is provided on the front side or the rear side compared to the absorbent core.
According to the sanitary napkin of aspect 6, the influence on the absorption performance can be reduced by disposing the low emissivity sheet at a position where the absorption performance of the absorbent core is hardly affected.
In aspect 7, in the sanitary napkin according to any one of aspects 1 to 6, when the overlapping region is defined as a portion where the low-emissivity sheet overlaps the functional material and the non-overlapping region is defined as a portion where the functional material does not overlap the low-emissivity sheet, the amount of the functional material per unit area in the overlapping region is larger than the amount of the functional material per unit area in the non-overlapping region.
According to the sanitary napkin of aspect 7, since the effect of the functional material is easily exerted in the overlapping region where the low emissivity sheet and the functional material overlap, the effect is more easily perceived by increasing the amount of the functional material in such overlapping region.
In aspect 8, in the sanitary napkin according to any one of aspects 1 to 5, when the side that is the abdomen side of the wearer when worn is the front side and the side that is the back side of the wearer is the back side in the longitudinal direction, the low emissivity sheet is disposed on the front side with respect to the front end of the absorbent core, the functional material is disposed so as to have a portion overlapping the absorbent core when viewed in the thickness direction, and when the portion where the low emissivity sheet overlaps the functional material is the 1 st overlapping region and the portion where the absorbent core overlaps the functional material is the 2 nd overlapping region, the amount of the functional material per unit area in the 2 nd overlapping region is larger than the amount of the functional material per unit area in the 1 st overlapping region.
According to the sanitary napkin of aspect 8, the functional material provided in the 2 nd overlapping region (absorbent core side) is provided in the region where the low emissivity sheet is not present. In the region overlapping the low emissivity sheet like the 1 st overlapping region, the functional material easily exerts an effect, and thus, in the 2 nd overlapping region, the effect of the functional material is improved by increasing the amount of the functional material. On the other hand, in the 1 st overlapping region, since the low emissivity sheet is present, even if the amount of the functional material is smaller than that in the 2 nd overlapping region, the effect of the functional material can be exerted.
The sanitary napkin according to any one of the aspects 1 to 8, wherein the functional material is a heat sensitive agent or a cold sensitive agent, and the functional material is provided in a state of being mixed with a water-soluble solvent.
According to the sanitary napkin of aspect 9, since the region provided with the functional material is a region in which perspiration is promoted by the low emissivity sheet and the moisture content by the perspiration increases, if the solvent is water-soluble, the functional material is easily dissolved by the perspiration and is easily adapted to the skin, and the functional material is easily impregnated into the skin.
In the embodiment 10, in the sanitary napkin according to any one of the embodiments 1 to 5 and the embodiments 7 to 9, the sanitary napkin includes a pair of wing portions extending to both outer sides in the width direction, wing adhesive portions to which an adhesive is applied are provided on the non-skin side of the pair of wing portions in the thickness direction, and the low emissivity sheet is provided on a position closer to the front side than the wing adhesive portions when the side to be the abdomen side of the wearer is the front side and the side to be the back side of the wearer is the back side in the longitudinal direction, and the low emissivity sheet is not provided on a position closer to the back side than the wing adhesive portions.
According to the sanitary napkin of aspect 10, the effect of the functional material can be exhibited particularly on the front side in the longitudinal direction.
In the aspect 11, the sanitary napkin according to any one of aspects 1 to 10 is characterized in that the low emissivity sheet is not provided in a region overlapping the flap adhesive portion in the longitudinal direction.
According to the sanitary napkin of aspect 11, the region where the flap adhesive portion is provided is a region where the matching property with respect to the absorbent core is required so that the absorbent core does not shift, and if the low emissivity sheet is disposed in such a region, the portion where the flap portion is folded back becomes hard, and there is a possibility that a sense of discomfort is generated when the flap portion is rubbed against the thigh, and this can be avoided by not being disposed in this region.
In the sanitary napkin according to any one of aspects 1 to 11, the sanitary napkin has a peripheral edge compression portion for compressing the skin-side sheet member and the non-skin-side sheet member in the thickness direction along the outer peripheral edge portion in the planar shape of the sanitary napkin, or a peripheral edge joint portion for joining the skin-side sheet member and the non-skin-side sheet member in the thickness direction along the outer peripheral edge portion in the planar shape of the sanitary napkin, and the low-emissivity sheet does not overlap with the peripheral edge compression portion or the peripheral edge joint portion when viewed in the thickness direction.
According to the sanitary napkin of aspect 12, the peripheral compressed portion or the peripheral joined portion is a portion having high rigidity, and there is a possibility that the low emissivity sheet may become harder when it is overlapped with such a high rigidity portion, and thus this occurrence is avoided by disposing the sheet so as not to overlap.
Aspect 13 is a sanitary napkin holder comprising: individually packaging individual bags of the sanitary napkin according to any one of aspects 1 to 12 with a sheet-shaped packaging material; and a housing member for housing the plurality of individual packages, wherein the low emissivity sheet of the sanitary napkin has an oxygen permeability of less than 200cc/m 2 day atm, the packaging material or the housing member has an emissivity lower than the non-skin side sheet of the sanitary napkin, and the packaging material or the housing member has an oxygen permeability of less than 200cc/m 2 day atm.
According to the sanitary napkin holder of aspect 13, since the low emissivity sheet has a low oxygen permeability, volatilization from a portion where the effect of the functional material is expected to be exhibited can be suppressed. In addition, in the sanitary napkin holder, the packaging material or the holding member has the same function as the low emissivity sheet of the sanitary napkin, so that the volatilization suppressing effect as a whole product is easily achieved.
In aspect 14, there is provided a pants-type absorbent article having a top-bottom direction, a width direction, and a front-back direction intersecting each other, the pants-type absorbent article including a liquid-absorbent main body and a waist member disposed on a non-skin side of the main body in a superposed manner, the pants-type absorbent article comprising: an absorbent core; a skin-side sheet disposed on the skin side of the absorbent core; and a non-skin side sheet disposed on a non-skin side with respect to the absorbent core, wherein a low emissivity sheet having a lower emissivity than the non-skin side sheet is provided between the skin side sheet and the non-skin side sheet, a functional material is provided on a skin side of the low emissivity sheet, the absorbent body has a central elastic member that is stretchable in a longitudinal direction of the absorbent body in an expanded state at a central portion in the width direction of the absorbent body, and the low emissivity sheet and the central elastic member have overlapping portions when viewed in a thickness direction of the absorbent body in the expanded state.
According to the pants-type absorbent article of aspect 14, the central elastic member contracts in the longitudinal direction when worn, whereby the low emissivity sheet can be reliably fitted to the vaginal opening or the natal cleft, and the effect of the functional material can be improved.
In the aspect 15, the low emissivity sheet is provided in at least a part of a region corresponding to a crotch region of a wearer when the sanitary napkin according to the aspect 14 is worn.
According to the pants-type absorbent article of aspect 15, perspiration is promoted by the low emissivity sheet before the wearer discharges (excretes) body fluid, and the absorbent article absorbs perspiration. This improves the liquid permeability of the absorbent article, and can suppress the reduction of liquid retention on the skin surface of the absorbent body and the expansion of the liquid diffusion area on the skin surface, thereby improving the absorption performance.
In the pants-type absorbent article according to aspect 16, the pants-type absorbent article has a liquid-absorbing main body and a waist member that is disposed on the non-skin side of the main body and that stretches in the width direction, the waist member has a first waist member disposed on one side in the front-back direction and a second waist member disposed on the other side in the front-back direction, both ends in the width direction of the first waist member and the second waist member are joined to each other at a joining portion, and the first waist member has a low emissivity sheet having a lower emissivity than the sheet member disposed on the non-skin side between the sheet member disposed on the most skin side and the sheet member disposed on the most non-skin side, and the second waist member has a stretchable elastic member in the width direction, and the first waist member has a function of joining the first waist member and the second waist member at a position on the most skin side and the lower emissivity sheet disposed on the most skin side than the lower end of the first waist member.
According to the pants-type absorbent article of aspect 16, the elastic member having stretchability in the width direction contracts in the width direction when worn, and thereby the functional material and the low emissivity sheet are brought into close contact with the body, and the effect of the functional material can be improved.
= = 1 St embodiment= = = =1 st embodiment
Hereinafter, an embodiment of a sanitary napkin 1 (hereinafter also referred to as "sanitary napkin 1") according to embodiment 1 will be described. However, the sanitary napkin 1 of the present embodiment is not limited to the above, and may be used by being attachable to the clothing of the user, such as a panty liner or a light incontinence pad.
Basic constitution of sanitary towel 1
Fig. 1 is a schematic plan view of a sanitary napkin 1 according to embodiment 1 (hereinafter referred to as "sanitary napkin 1") as seen from the skin side. Fig. 2 is a schematic plan view of the sanitary napkin 1 according to embodiment 1 as viewed from the non-skin side. Fig. 3A is a schematic cross-sectional view taken along the line A-A of fig. 1, and fig. 3B is a schematic cross-sectional view taken along the line B-B of fig. 1. Fig. 4 is a schematic cross-sectional view taken along line C-C of fig. 1.
As shown in fig. 1, the sanitary napkin 1 has a longitudinal direction, a width direction, and a thickness direction intersecting each other. In the longitudinal direction, the side that becomes the abdomen side of the wearer when worn is the front side, and the side that becomes the back side of the wearer is the back side. The direction perpendicular to the longitudinal direction and the width direction (the direction penetrating the paper surface in fig. 1) is referred to as the thickness direction, and the side in contact with the skin of the wearer in the thickness direction is referred to as the skin side, and the opposite side is referred to as the non-skin side (see fig. 3A, etc.).
As shown in fig. 1 to 4, the sanitary napkin 1 includes: a liquid-absorbent core 2; a skin-side sheet 3 disposed on the skin side of the absorbent core 2 in the thickness direction; and a non-skin-side sheet 4 disposed on the non-skin side of the absorbent core 2 in the thickness direction. In the present embodiment, a sub-sheet 6 (fig. 4) is provided between the skin-side sheet 3 and the absorbent core 2 so as to overlap the absorbent core 2 in the longitudinal direction. The sanitary napkin 1 further includes a pair of side sheets 5, at least a part of which is joined to the skin-side sheet 3 and arranged in pairs in the width direction. These members 2 to 6 are joined to members adjacent in the thickness direction by an adhesive HMA such as a hot melt adhesive. In the present embodiment, a functional material 50 described later is provided on at least a part of the non-skin side surface of the skin-side sheet 3.
The skin-side sheet 3 and the sub-sheet 6 are liquid-permeable sheets that allow liquid such as body fluid to pass through, and examples thereof include a hot air nonwoven fabric. The non-skin-side sheet 4 is a liquid impermeable sheet, and examples thereof include a resin film of Polyethylene (PE). The skin-side sheet 3 and the non-skin-side sheet 4 have a larger planar dimension than the absorbent core 2. The skin-side sheet 3 covers at least the widthwise center of the absorbent core 2 from the skin side. The side sheet 5 covers both side end portions of the skin-side sheet 3 in the width direction from the skin side and extends outward in the width direction than the skin-side sheet 3 (see fig. 3A and 3B). From the viewpoint of leakage prevention, a hydrophobic sheet may be used for the side sheet 5.
The absorbent core 2 is disposed at least between the skin-side sheet 3 and the non-skin-side sheet 4, and is a member that absorbs liquids (excretory liquids) such as menstrual blood and holds the liquids therein. As the absorbent material constituting the absorbent core 2, pulp fibers, cellulose absorbent fibers, liquid-absorbent particulate matters such as superabsorbent polymers (so-called SAP), and the like, which are liquid-absorbent fibers, can be used. The absorbent core 2 may also contain thermoplastic resin fibers. The sanitary napkin 1 is provided with a liquid-permeable core wrap sheet 2a so as to wrap the absorbent core 2. As a material suitable for the core wrap sheet 2a, tissue paper, nonwoven fabric, or the like can be exemplified. The core wrap sheet 2a may be disposed separately on the skin side and the non-skin side, or the core wrap sheet 2a may not be provided.
The sanitary napkin 1 further includes: a pair of wing parts 20 which are provided mainly at the rear side and extend to both outer sides in the width direction than the central position Y in the longitudinal direction of the sanitary napkin 1; and a pair of front flap portions 30 provided on the front side and extending to both outer sides in the width direction from the central position Y in the longitudinal direction of the sanitary napkin 1.
In embodiment 1, the flap portion 20 is formed by the side sheet 5 and the non-skin side sheet 4 extending outward from both side portions in the width direction of the skin side sheet 3, but is not limited thereto. Further, another sheet member (not shown) for improving the strength of the flap portion 20 or the like may be provided between the side sheet 5 and the non-skin side sheet 4.
The sanitary napkin 1 is divided into a front region 1A on the front side of the front end of the absorbent core 2 and a rear region 1B on the rear side of the front region 1A in the longitudinal direction. The pair of front flap portions 30 is disposed in the front region 1A. The pair of wing parts 20 are disposed in the rear region 1B.
The sanitary napkin 1 has a low emissivity sheet 10, an upper absorbing sheet 11, and a lower absorbing sheet 12 between the skin side sheet 3 and the non-skin side sheet 4, and the low emissivity sheet 10, the upper absorbing sheet 11, and the lower absorbing sheet 12 are mainly disposed in the front region 1A. In the sanitary napkin 1 illustrated in fig. 1, the rear end portion of the low emissivity sheet 10 overlaps the front end portion of the absorbent core 2, and is disposed in the rear region 1B. Specifically, at least a part of the low emissivity sheet 10 is disposed on the non-skin side of the absorbent core 2 in the thickness direction (fig. 4), the upper absorbing sheet 11 is disposed on the non-skin side of the low emissivity sheet 10, and the lower absorbing sheet 12 is disposed on the non-skin side of the upper absorbing sheet 11. However, the rear end of the low emissivity sheet 10 is not limited to this, and may be in contact with the front end of the absorbent core 2 or may be separated toward the front side.
The upper absorbent sheet 11 and the lower absorbent sheet 12 are sheets capable of absorbing body fluids such as sweat and menstrual blood, and for example, an airlaid sheet obtained by forming liquid-absorbent fibers into a sheet by an airlaid method can be exemplified. The upper absorbing sheet 11 and the lower absorbing sheet 12 are provided so as to mainly ensure the function of the low emissivity sheet 10 described later, and preferably have the same planar dimensions as the low emissivity sheet 10 or a shape larger than the low emissivity sheet 10.
The shape of the front region 1A of the sanitary napkin 1 is not particularly limited, and examples thereof include triangular, rectangular, polygonal (including cases where corners are rounded, and cases where sides are curved), circular, elliptical, and biological shapes, or combinations thereof. The front region 1A of the present embodiment has a width larger than the maximum width of the rear region 1B excluding the pair of wing portions 20. The front region 1A has a substantially triangular shape with a width that narrows from its front end portion toward its rear end portion. The low emissivity sheet 10, the upper absorbing sheet 11, and the lower absorbing sheet 12 are also substantially triangular shapes in which the shape of the front region 1A is similarly reduced. However, the configuration is not limited to the above, and the low emissivity sheet 10, the upper absorbing sheet 11, and the lower absorbing sheet 12 may be rectangular, for example, or may be shaped differently from the front region 1A.
The pair of front flap portions 30 extending outward in the width direction in the front region 1A are formed of the side sheet 5, the low emissivity sheet 10, the upper side absorbent sheet 11, the lower side absorbent sheet 12, and the non-skin side sheet 4, at least a part of which extends outward from both side portions in the width direction of the skin side sheet 3, but are not limited thereto. Further, details of the low emissivity sheet 10 will be described later.
The rear region 1B of the sanitary napkin 1 is substantially shaped as a general sanitary napkin, and the pair of wing portions 20 are provided at substantially the center in the longitudinal direction of the rear region 1B. Further, it is assumed that a region slightly forward of the longitudinal center of the rear region 1B (the center of the wing portion 20 in the longitudinal direction) is in contact with the excretory opening of the wearer. In addition, the sanitary napkin may not have a flap portion.
As shown in fig. 2 and 3B, an adhesive portion 25 to which an adhesive is applied is provided on the non-skin side surface in the thickness direction of the non-skin side sheet 4 along the longitudinal direction. When the sanitary napkin 1 is used, the adhesive portion 25 is adhered to the skin side surface of the wearing article such as underwear, and thereby the sanitary napkin 1 is fixed to the wearing article. In fig. 2, 8 adhesive portions 25 having a rectangular shape with long sides in the longitudinal direction are arranged with an interval in the width direction, but the shape or the number of the adhesive portions 25 is not limited thereto.
Similarly, flap adhesive portions 21 (fig. 2) to which an adhesive is applied are provided on the non-skin side (non-skin side surface of the non-skin side sheet 4) of the respective flap portions 20 in the thickness direction. When the sanitary napkin 1 is used, the flaps 20 are folded toward the non-skin side, and the flap adhesive portions 21 are adhered to the non-skin side surface of the undergarment or the like, so that the sanitary napkin 1 is fixed to the undergarment or the like. In fig. 2,3 flap adhesive portions 21 having a rectangular shape with long sides in the longitudinal direction are arranged in the width direction, but the shape, number, and arrangement position of the flap adhesive portions 21 are not limited to this.
Further, front flap adhesive portions 31 to which an adhesive is applied are provided on the non-skin side (non-skin side surface of the non-skin side sheet 4) of the front flap portion 30 in the thickness direction (fig. 2 and 3A). The front flap portion 30 is not folded back when in use, and is disposed between a wearing article such as underwear and the abdomen of the wearer. The front flap adhesive portion 31 is adhered to the skin side surface of the undergarment or the like, whereby the sanitary napkin 1 is fixed to the undergarment or the like. In fig. 2,3 front flap adhesive parts 31 having a rectangular shape with long sides in the front-rear direction are arranged in the width direction, but the shape, the number, and the arrangement positions of the front flap adhesive parts 31 are not limited thereto.
As described above, the sanitary napkin 1 of the present embodiment has the front region 1A, and is a shape that is longer on the front side and wider than the shape of a general sanitary napkin 1. When the sanitary napkin 1 is worn such that the center in the longitudinal direction of the wing portions 20 of the sanitary napkin 1 corresponds to the excretory opening of the wearer, the front region 1A of the sanitary napkin 1 corresponds to the lower abdomen of the wearer. Since the lower abdomen of the wearer is covered with the front region 1A, the lower abdomen of the wearer can be heated as compared with the sanitary napkin 1 having no front region 1A.
As shown in fig. 1, a plurality of linear compressed portions 40 and dot compressed portions 41 and 42 are provided on the skin side surface of the sanitary napkin 1. In the linear compressed portion 40 of the sanitary napkin 1, as shown in fig. 3B, the skin-side sheet 3, the sub-sheet 6, the core-wrap sheet 2a, and the absorbent core 2 are compressed from the skin side in the thickness direction to be depressed, and the density of the absorbent core 2 is higher than that of the adjacent region. The plurality of linear compressed portions 40 compress (emboss) the skin-side sheet 3 to the absorbent core 2 from the skin side in the thickness direction, thereby realizing the joining integration. The linear compression portion 40 may compress at least the absorbent core 2 in the thickness direction, and may compress the absorbent core 2 and the skin-side sheet 3 in the thickness direction, or may compress the absorbent core 2 and the core-wrap sheet 2a in the thickness direction.
As shown in fig. 3A and 3B, the side sheet 5 and the skin side sheet 3 are compressed from the skin side in the thickness direction and recessed in the dot-like compressed portions 41 of the sanitary napkin 1, and the density of the dot-like compressed portions 41 is higher than that of the adjacent regions. The side sheet 5 and the skin side sheet 3 are compressed (embossed) from the skin side in the thickness direction by the plurality of dot-shaped compressed portions 41, thereby realizing the joining integration. The dot compressed portions 41 extend from one side (front side) to the other side (rear side) in the longitudinal direction, and are provided in pairs on both sides in the width direction of the sanitary napkin 1.
In the dot compressed portion 42 of the sanitary napkin 1, as shown in fig. 3A, the skin-side sheet 3, the low-emissivity sheet 10, the upper absorbent sheet 11, and the lower absorbent sheet 12 are compressed from the skin side in the thickness direction and are recessed, and the density is higher than that of the adjacent region. The plurality of dot compressed portions 42 compress (emboss) the skin-side sheet 3 to the lower absorbent sheet 12 from the skin side in the thickness direction, thereby realizing the joining integration.
< Low emissivity sheet 10 >)
In the present embodiment, the low emissivity sheet 10 is provided between the skin side sheet 3 and the non-skin side sheet 4, but the "low emissivity sheet" as referred to herein means a sheet-like member that is less likely to cause heat radiation, and is a sheet that exhibits a heat insulating effect or a heat retaining effect that prevents heat in the sanitary napkin during wear from escaping outward. Examples of the low emissivity sheet 10 include a sheet containing aluminum, and a sheet member obtained by laminating aluminum on a nonwoven fabric. The emissivity (epsilon) of the low emissivity sheet 10 is preferably 0.5 or less.
The emissivity can be measured by the following method. First, the low emissivity sheet 10 is separated from the other sheet members or absorbent core 2 constituting the sanitary napkin 1 and taken out as a single sheet. The measurement is performed on a portion of the low emissivity sheet 10 that is not subjected to a treatment such as compression. The order of measurement is as follows: 1) A blackbody coating (e.g., black Body Spray Ta ks manufactured by TASCO company) is applied to a portion of the low emissivity sheet 10; 2) Determining the temperature of the portion coated with the blackbody coating by a radiation temperature sensor set to emissivity=1; 3) Next, a portion to which the blackbody coating is not applied is measured, and the set value (emissivity=1) is adjusted so that the indicated value becomes equal to the temperature of the portion to which the blackbody coating was applied, which was measured in advance, and the emissivity obtained by the adjustment is used as the emissivity of the object.
In addition, the lower the emissivity of the object, the stronger the surface reflection (higher the reflectivity), and thus the low emissivity sheet 10 is also a sheet that easily reflects heat or moisture. With such a low emissivity sheet 10, the temperature and humidity between the wearer's body and the low emissivity sheet 10 can be increased after wear.
Detailed details of functional Material 50
In the present embodiment, the sanitary napkin 1 is provided with a functional material 50 as a heat sensitive agent for giving a heat sensation to the wearer at a position closer to the skin side than the low emissivity sheet 10 in the thickness direction. The thermal sensation agent as the functional material 50 is provided for alleviating the symptoms of physiological pain or coldness of the wearer, and is provided in a state of being mixed with a solvent as a volatile substance, and includes a thermal sensation stimulator that stimulates the temperature sensation of the wearer and causes the wearer to feel heat.
The heat sensitive agent (functional material 50) is provided on the skin side of the sheet 10 having a lower emissivity than the sheet 10 in the thickness direction, and is applied to the non-skin side surface of the skin side sheet 3. The heat sensitive agent according to the present embodiment exerts its main heat sensitive effect so as to reach the skin of the wearer.
As shown in fig. 1, in the present embodiment, the functional material 50 extends in the longitudinal direction and is arranged in plurality at intervals in the width direction, but the shape or the number thereof is not limited to this, and may be arranged in a predetermined shape such as a plane, a line, a spiral, a zigzag, or a dot at a desired position.
The thermal stimulant is preferably a plant-derived compound from the standpoint of the wearer's feeling of confidence. Examples of the thermal stimulus include: capsaicin, capsaicin (LD 50:47mg/kg, molecular weight: 305), capsaicinoids (dihydrocapsaicin, nordihydrocapsaicin, homocapsaicin, synthetic capsaicin, etc.), capsanthin, benzyl nicotinate (LD 50:2,188mg/kg, molecular weight: 213), beta-butoxyethyl nicotinate, N-acid chloroamide, vanillylaminononanoate, polyalcohols, chilli powder, capsicum tincture, capsicum extract, vanillyl ether nonanoate, vanillyl alkyl ether derivatives (e.g., vanillyl ethyl ether, vanillyl butyl ether (LD 50:4,900mg/kg, molecular weight: 210), vanillyl amyl ether, vanillyl hexyl ether), isovanillyl alkyl ether, ethyl vanillyl alkyl ether, veratol derivatives, substituted benzyl alcohol alkyl ethers, vanillin propylene glycol acetal, ethyl vanillin propylene glycol acetal, ginger extract, ginger oil, capsaicin (LD 50:250mg/kg, molecular weight: 294), gingerol, hesperidin, and pyrrolidone, and also any combination thereof.
The solvent is not particularly limited as long as it can contain a thermal stimulus, and examples thereof include lipophilic solvents and hydrophilic solvents. The solvent may be, for example, a solvent that dissolves or disperses the thermal stimulus.
Examples of the lipophilic solvent include oils and fats, for example, natural oils (for example, fatty acid esters such as triglycerides, coconut oil, linseed oil, and tri (caprylic/capric) glycerol), hydrocarbons (for example, paraffin, such as liquid paraffin).
The hydrophilic solvent may be water or alcohol. Examples of the alcohol include lower alcohols such as methanol, ethanol, ethylene glycol, and glycerin, higher alcohols such as octyl alcohol, lauryl alcohol, and tetradecyl alcohol.
In addition, the thermosensor is preferably of a type that stimulates a temperature sensitive TRP channel. For example, TRPV1, one of the temperature sensitive TRP channels, may be activated by stimulation with capsaicin, acid, or the like. Also, if TRPV1 of the wearer is activated, heat generation is caused via the conversion nervous system (the wearer generates heat in the body).
That is, the wearer may be heated not by itself, such as capsaicin, but by itself, such as a portable disposable warmer, instead of being heated by itself. In this way, the wearer can feel heat without cold burns or burns.
The solvent is in a state of containing the thermal sensitive agent or is gasified together with the thermal sensitive agent. Thus, the thermal stimulant reaches the skin of the wearer, and the reached thermal stimulant stimulates the temperature sensation of the wearer. In addition, the thermosensor used in the present invention is vanillyl butyl ether. By attaching the solvent from the sanitary napkin 1 to the skin toward the TRPV1 channel, the temperature sensation of the wearer can be stimulated by both the solvent reaching the channel and the solvent vaporizing to the skin. In the present embodiment, if the route described later is used, even if the heat sensitive agent does not directly contact the skin of the wearer, the vaporized heat sensitive agent can contact the skin of the wearer by vaporization of the heat sensitive agent.
As described above, the sanitary napkin 1 according to the present embodiment has the low emissivity sheet 10 between the skin-side sheet 3 and the non-skin-side sheet 4. In the conventional absorbent article, there is a type in which a metal layer is provided on a part of a constituent material constituting the absorbent article to prevent a decrease in temperature of body fluid after excretion, but it is difficult to achieve an appropriate heat sensation or cold sensation effect by simply providing a metal layer, although moisture retention and heat preservation are possible. In addition, in the sanitary napkin, since the sanitary napkin is preferably replaced immediately after excretion (excretion) compared with the effect of maintaining the blood in a warm state or a cold feeling after excretion, it is preferable that the sanitary napkin can exert the functions of heat feeling and cold feeling to the maximum extent immediately after wearing the sanitary napkin. Further, if a sheet including aluminum or the like is used at such a position, the rigidity may be increased, and the hardness may be perceived.
In this regard, the sanitary napkin 1 according to the present embodiment is provided with the heat sensitive agent (functional material) 50 at a position closer to the skin side than the low emissivity sheet 10 in the thickness direction, and the low emissivity sheet 10 and the functional material 50 have a portion overlapping each other when viewed in the thickness direction (the direction penetrating the paper surface in fig. 1). By providing the low emissivity sheet 10, heat dissipation from the body is less likely to escape to the non-skin side, and thus, immediately after wearing the sanitary napkin 1, the temperature between the wearer's body and the low emissivity sheet 10 is brought close to the body temperature, and pores are easily loosened by moisturizing the skin surface. The heat sensitive agent (functional material 50) located on the skin side of the low emissivity sheet 10 is also easily volatilized by such heat preservation and moisture preservation, and the components of the heat sensitive agent easily penetrate from the loosened pores to the inside of the skin. This can maximize the effect of the heat sensitive agent in a short time after wearing. Since the low emissivity sheet 10 of the sanitary napkin 1 is disposed so as to abut against the lower abdomen when worn, the effect of reducing physiological pain by heating the uterus of the wearer can be expected even after wearing.
In the sanitary napkin 1, the outer end 10e of the low emissivity sheet 10 is located inside the outer end 1e of the sanitary napkin 1 in the width direction. The outer end 1e in the width direction of the sanitary napkin 1 is a portion that is easily contacted by the thighs when the body is moved during wearing. When the low emissivity sheet 10 is arranged to the outer end 1e of the sanitary napkin 1 in the width direction, the outer end 1e of the sanitary napkin 1 is easily hardened, and by separating the outer end 10e of the low emissivity sheet 10 in the width direction from the outer end 1e of the sanitary napkin 1 in the width direction, the hardness of the outer end 1e of the sanitary napkin 1 can be reduced, and the flexibility of the sanitary napkin 1 as a whole can be ensured. In addition, similarly, when the low emissivity sheet 10 is used in the outermost portion of the sanitary napkin 1 such as the non-skin side sheet 4, the low emissivity sheet 10 is preferably disposed on the skin side with respect to the non-skin side sheet 4 because the hardness is easily perceived when the sanitary napkin is in contact with the thigh, and there is a possibility that the skin touch may be degraded. Therefore, the low emissivity sheet 10 is a sheet having a lower emissivity than the non-skin side sheet 4, and is disposed between the skin side sheet 3 and the non-skin side sheet 4, whereby the softness of the sanitary napkin 1 can be ensured.
In addition, with the sanitary napkin 1, it is preferable that the maximum thickness of the absorbent core 2 (maximum length in the thickness direction of the absorbent core 2) is thicker (longer) than the maximum thickness of the low emissivity sheet 10 (maximum length in the thickness direction of the low emissivity sheet 10). The thickness of the absorbent core 2 and the low emissivity sheet 10 can be measured by a known method. For example, a thickness is measured by pressurizing a target site at 3.0gf/cm 2 using a dial gauge ID-C1012C manufactured by MITUTOYO (Co., ltd.) or a device equivalent thereto. In the measurement, the thickness of the sanitary napkin 1 is measured first before the measurement portion is cut out, and then the thickness of each other sheet is measured after the absorbent core 2 is removed. The thickness of each sheet was subtracted from the thickness of the sanitary napkin 1 measured before cutting out, and the value was set as the thickness of the absorbent core 2. The low emissivity sheet 10 is measured as a sheet. For each thickness, 10 pieces of the same package packed with the product (sanitary napkin 1) or the product produced on the same day were prepared, and the average value obtained by measurement was set as the maximum thickness.
Since the above-described constituent materials of the absorbent core 2 can expect heat-retaining and moisture-retaining effects, the thicker the thickness (length in the thickness direction) of the absorbent core 2, the easier it is to retain heat released from the body by the low emissivity sheet 10 and the moisture is made difficult to escape by the absorbent core 2, and the moisture-retaining effects are also easily achieved.
As shown in fig. 4, in the present embodiment, at least a part of the low emissivity sheet 10 is disposed on the non-skin side of the absorbent core 2 in the thickness direction. The low emissivity sheet 10 can prevent the absorption performance of the absorbent core 2 from being lowered, and the influence of external air can be reduced by being positioned on the non-skin side, so that the heat-insulating state in the sanitary napkin 1 can be easily stabilized when worn.
As described above, in the present embodiment, the low emissivity sheet 10 is arranged on the non-skin side of the absorbent core 2 at least in part in the thickness direction, but the present invention is not limited to this, and the low emissivity sheet 10 may be arranged on the skin side of the absorbent core 2 at least in part in the thickness direction. Since the portion of the low emissivity sheet 10 that is disposed closer to the skin than the absorbent core 2 is to the skin of the wearer, the body temperature can be efficiently reflected, the temperature between the body and the low emissivity sheet 10 can be brought closer to the body temperature, and the humidity can be easily increased. Further, since the functional material 50 is provided on the skin side of the low emissivity sheet 10, the portion of the low emissivity sheet 10 that is disposed on the skin side of the absorbent core 2 can prevent the functional material 50 from transferring to the absorbent core 2, and the effect of the functional material 50 can be prevented from being reduced.
The sanitary napkin 1 further includes a pair of side sheets 5, at least a part of which is joined to the skin side sheet 3 and arranged in pairs in the width direction, and the side sheets 5 are further laminated on both sides in the width direction of the sanitary napkin 1, whereby the matching properties of both sides are improved according to the thickness thereof. The side sheet 5 of the sanitary napkin 1 according to the present embodiment is not provided with an elastic member. Since the side sheet 5 has no elastic member, the low emissivity sheet 10 can be held flat without shrinking, and the uncomfortable feeling that is easily caused by shrinking the low emissivity sheet 10, which is often a high rigidity portion, can be reduced.
As shown in fig. 1, at least a part of the low emissivity sheet 10 is provided on the front side in the longitudinal direction with respect to the absorbent core 2. By disposing the low emissivity sheet 10 at a position where the absorption performance of the absorbent core 2 is hardly affected in this way, the influence on the absorption performance can be reduced. The present invention is not limited to the configuration in which at least a part of the low emissivity sheet 10 is provided on the front side of the absorbent core 2 in the longitudinal direction, and similar effects can be exhibited even if at least a part of the low emissivity sheet 10 is provided on the rear side of the absorbent core 2 in the longitudinal direction.
In the present embodiment, when the portion where the low emissivity sheet 10 overlaps the functional material 50 is referred to as an overlapping region and the portion where the functional material 50 does not overlap the low emissivity sheet 10 is referred to as a non-overlapping region as viewed in the thickness direction, it is preferable that the amount of the functional material 50 per unit area in the overlapping region is larger than the amount of the functional material 50 per unit area in the non-overlapping region (in addition, "amount" per unit area means "weight" per unit area). Since the functional material 50 easily exhibits its effect in the overlapping region with the low emissivity sheet 10, the effect of the functional material 50 is more easily perceived by increasing the amount of the functional material 50 in such overlapping region.
The measurement of the thermal sensor (functional material 50) per unit area can be performed by, for example, the following method. First, the overlapping region and the non-overlapping region are cut out, the weights of the overlapping region and the non-overlapping region are measured, and then the overlapping region and the non-overlapping region are left for a predetermined period of time until the thermally sensitive material in the overlapping region and the non-overlapping region is completely volatilized. The weights of the overlapping region and the non-overlapping region where the heat-sensitive substance completely volatilized were measured, and the difference between the weights of the overlapping region and the non-overlapping region before the volatilization of the heat-sensitive substance was calculated. Finally, regarding each difference, by dividing each area of the overlapping region and the non-overlapping region, the amount of the heat sensitive agent per unit area of each of the overlapping region and the non-overlapping region can be obtained.
In the present embodiment, the low emissivity sheet 10 and the functional material 50 have overlapping portions when viewed in the thickness direction, and the heat sensitive agent as the functional material 50 is provided in a state of being mixed with the solvent as the volatile substance, but the solvent is water-soluble. That is, in the sanitary napkin 1, the region where the heat sensitive agent (functional material 50) is provided is also a region where the moisture content by perspiration increases due to the acceleration of perspiration by the low emissivity sheet 10, and therefore, if the solvent is water-soluble, the solvent is dissolved by perspiration, and the skin is easily adapted to the heat sensitive agent and easily permeates into the skin.
In addition, it is preferable that the amount of the thermal sensitizer to be mixed is smaller than the amount of the solvent. The heat sensitive agent can exhibit an effect even in a small amount, and if the amount of the heat sensitive agent is larger than the amount of the solvent, there is a possibility that the heat sensitive effect is too strong to cause pain or itching, and by reducing it, the occurrence of such pain or itching can be reduced.
Further, the flap adhesive portions 21 are provided on the non-skin side in the thickness direction of the pair of flap portions 20 provided in the sanitary napkin 1, respectively, whereas in the present embodiment, the low emissivity sheet 10 is provided on the front side of the flap adhesive portions 21 in the longitudinal direction, and the low emissivity sheet 10 is not provided on the rear side of the flap adhesive portions 21 (see fig. 2). The heat sensitive agent is provided on the skin side of the low emissivity sheet 10, and thus the effect of the heat sensitive agent can be exhibited particularly on the front side (abdomen side). Thus, a thermal sensation can be provided to the wearer's lower abdomen from an early stage after wearing.
In addition, the sanitary napkin 1 is preferably provided with no low emissivity sheet 10 in the region overlapping the flap adhesive portion 21 in the longitudinal direction. The region where the flap adhesive portion 21 is not provided is a region where the matching with the absorbent core 2 is sought so that the absorbent core 2 does not shift. Further, if the low emissivity sheet 10 is disposed in such a region, the folded-back portion of the wing portions 20 becomes hard when worn, and there is a possibility that a sense of discomfort may occur when rubbing against the thigh, and this possibility can be avoided by not providing the low emissivity sheet 10 in this region.
As shown in fig. 1, the sanitary napkin 1 is provided with: a peripheral edge compression portion 45 for compressing the side sheet 5 (sheet member closest to the skin in the thickness direction) and the non-skin side sheet 4 (sheet member closest to the non-skin in the thickness direction) in the thickness direction; and a peripheral edge joining portion 46 for pressing and joining at least the skin-side sheet 3 (sheet member closest to the skin in the thickness direction) and the non-skin-side sheet 4 (sheet member closest to the non-skin in the thickness direction) in the thickness direction. In the present embodiment, the outer peripheral edge portion of the sanitary napkin 1 is compressed or bonded over the entire periphery by the peripheral edge compression portion 45 and the peripheral edge bonding portion 46, but the present invention is not limited thereto, and only any one may be formed over the entire periphery. Alternatively, the heat-seal member may not be formed over the entire circumference, but may be formed by thermocompression bonding.
In the present embodiment, the low emissivity sheet 10 does not overlap with the peripheral edge compressed portion 45 or the peripheral edge joint portion 46 when viewed in the thickness direction. The peripheral compressed portion 45 or the peripheral joined portion 46 is a portion having high rigidity, and if the low emissivity sheet 10 is overlapped on such a portion, the peripheral portion may become harder, and therefore, by disposing so as not to overlap the low emissivity sheet 10, hardening of the outer peripheral portion of the sanitary napkin 1 can be avoided.
In the sanitary napkin 1, the dot compressed portions 42 provide recessed portions (not shown) on the skin side surface of the low emissivity sheet 10, and the recessed portions have a higher density than the surrounding area. Moisture heated by the low emissivity sheet 10 is likely to accumulate in such a recess, and the wearer's body can be heated more easily.
In the sanitary napkin 1, the adhesive portion 25 and the front flap adhesive portion 31 to which the adhesive is applied are provided on the non-skin side surface in the thickness direction of the non-skin side sheet 4, respectively, and such adhesive portion to which the adhesive is applied is not provided on the skin side surface of the skin side sheet 3 or the side sheet 5, that is, the portion in contact with the skin. If there is an adhesive portion on the skin-side surface of the portion where the low emissivity sheet 10 or the thermal sensitive agent (functional material 50) is provided, there is a possibility that itching may be increased and the skin may be damaged due to penetration of the adhesive into the skin, and therefore, it is preferable that there is no adhesive portion at a portion in contact with the skin.
As described above, in the present embodiment, the low emissivity sheet 10 having a lower emissivity than the non-skin side sheet 4 is provided between the skin side sheet 3 and the non-skin side sheet 4, and a resin film of Polyethylene (PE) or the like is exemplified as the non-skin side sheet 4. In the case where the non-skin side sheet 4 is a sheet containing aluminum, for example, in the case where a laminate of aluminum is used for at least a part of the non-skin side surface of the non-skin side sheet 4, it is considered that the anchoring effect obtained by fixing the aluminum sheet is lower than the anchoring effect obtained by fixing the adhesive (so-called offset preventing adhesive) used for the flap adhesive portion 21, the adhesive portion 25 or the front flap adhesive portion 31 to the resin film. If the anchoring effect of the anti-migration adhesive material is reduced, there is a possibility that the adhesive will remain on the undergarment when the sanitary napkin 1 is peeled off from the undergarment, and therefore, it is preferable to prevent the problem occurring when the sanitary napkin 1 is used by not using such an aluminum sheet (low emissivity sheet) as the non-skin side sheet 4.
Fig. 5 is a diagram showing a modification of the application position of the functional material 50. In this modification, the low emissivity sheet 10 is disposed on the front side of the front end 2fe of the absorbent core 2 in the longitudinal direction. That is, the low emissivity sheet 10 and the absorbent core 2 do not overlap when viewed in the thickness direction. In this modification, the trapezoid low emissivity sheet 10 is provided, but the shape is not limited to this, and any shape may be used if the front end 2fe of the absorbent core 2 is disposed on the front side in the longitudinal direction.
A pair of thermal sensitive agents (functional materials 50) are applied to one side and the other side in the width direction at an interval in the center portion in the width direction so as to overlap the low emissivity sheet 10 when viewed in the thickness direction, and along the length direction. Here, when the heat sensitive agents (functional materials) 50a and 50b are applied to one side and the other side in the width direction, the heat sensitive agents (functional materials) 50a and 50b extend so as to have portions overlapping the absorbent core 2 in the longitudinal direction. That is, when viewed in the thickness direction, the heat-sensitive materials (functional materials) 50a, 50b are provided so as to have a portion overlapping the absorbent core 2. Further, in this modification, another heat sensitive material (functional material) 50c is provided between the heat sensitive materials 50a and 50b in the width direction and at a portion overlapping the absorbent core 2 when viewed in the thickness direction. The heat sensitive material 50c may be applied to the skin side surface of the absorbent core 2 (core wrap sheet 2 a), for example.
Here, when the portions where the low emissivity sheet 10 and the heat sensitive agents (functional materials) 50a, 50b overlap when viewed in the thickness direction are respectively referred to as the 1 st overlapping region T1, and the portions where the absorbent core 2 and the heat sensitive agents (functional materials) 50a, 50b, 50c overlap are respectively referred to as the 2 nd overlapping region T2, in this case, it is preferable that the amount of the functional materials 50 (50 a, 50b, 50 c) per unit area in the 2 nd overlapping region T2 is larger than the amount of the functional materials 50 (50 a, 50 b) per unit area in the 1 st overlapping region T1. The definition of the amount per unit area and the measurement method per unit area are the same as those in the example of embodiment 1, and therefore omitted. As in the 1 st overlapping region T1, the functional material 50 is provided in the region overlapping with the low emissivity sheet 10, so that the functional material 50 is more easily volatilized by virtue of heat preservation and moisture preservation by the low emissivity sheet 10, and the effect of the functional material 50 is easily exerted. The functional material 50 provided in the 2 nd overlapping region T2 is provided in a region where no low emissivity sheet 10 is present, and the ease of volatilization is reduced as compared with the 1 st overlapping region T1, whereas in the 2 nd overlapping region T2, the effect of the functional material 50 can be improved by increasing the amount of the functional material 50. On the other hand, in the 1 st overlapping region T1, the low emissivity sheet 10 is present and the effect is easily exerted, and therefore, even if the amount of the functional material 50 is smaller than that in the 2 nd overlapping region T2, the effect can be exerted. The position of applying the functional material 50 is not limited to the position of this modification, and the functional material 50 may be applied more in the region overlapping the absorbent core 2 when viewed in the thickness direction (i.e., the region corresponding to the 2 nd overlapping region T2 described above).
< Individual package 60 of sanitary napkin 1 and sanitary napkin Container 80>
Fig. 6A is a schematic perspective view of the sanitary napkin holder 80, and fig. 6B is a view of the sanitary napkin holder 80 in an unsealed state. First, when forming the individual package 60 in which the sanitary napkin 1 is individually packaged by the packaging material 61, the adhesive portions (the flap adhesive portion 21, the adhesive portion 25, and the front flap adhesive portion 31) provided on the non-skin side surface of the non-skin side sheet 4 are covered with a release sheet (not shown) from the non-skin side in the thickness direction, and the release sheet and the sheet-like packaging material 61 are adhered and attached by weak adhesive force. Then, in a state where the sanitary napkin 1 is packaged by the packaging material 61 (for example, a synthetic resin film or the like), the sanitary napkin is folded at a predetermined portion, and both ends in the width direction (left-right direction) of the individual package 60 are joined by side seal portions (not shown), thereby forming the individual package 60.
The sanitary napkin holder 80 (hereinafter also referred to as holder 80) includes: a plurality of individual bags 60; a housing member 70 that houses the plurality of individual packages 60; and a sealing member 75.
The housing body 80 has a vertical direction, a front-rear direction, and a left-right direction intersecting with each other. The side of the housing body 80 from which the individual package 60 is taken out is referred to as "up" and the opposite side is referred to as "down" in the up-down direction. In the front-rear direction, the side from which the individual packages 60 are taken out is referred to as "front", the front side is also referred to as "front", the opposite side is referred to as "rear", and the rear side is also referred to as "rear". The housing 80 has a plurality of outer surfaces, which means: a front surface 80A as the front surface in the front-rear direction; a back surface 80C facing the front surface 80A in the front-rear direction; a pair of side surfaces 80B that are surfaces located between the front surface 80A and the rear surface 80C and along the up-down direction and the front-rear direction; an upper surface 80D as an upper surface among the surfaces located between the front surface 80A and the rear surface 80C and along the left-right direction and the front-rear direction, and a lower surface 80E as a lower surface. The housing 80 shown in fig. 6A and 6B has a substantially rectangular parallelepiped shape, but the shape of the package is not particularly limited, and may be, for example, a bag shape in which a tubular packaging material is sealed up and down.
As shown in fig. 6B, in the housing member 70, each individual package 60 is inserted so that the side seal portions located at both ends of the individual package 60 in the left-right direction are along both ends of the housing member 70, and the plurality of individual packages 60 are housed so as to be aligned in the front-rear direction of the housing member 70.
As shown in fig. 6A and 6B, in a state before the container 80 is initially opened, the container member 70 has an opening defining portion 82 (hereinafter also referred to as "easy-tear line 82") such as an easy-tear line for defining the opening 81. In fig. 6A, the range of the seal member 75 is shown by a two-dot chain line for convenience. The tear line 82 is located inside the outer edge of the seal member 75.
The sealing member 75 is provided to cover at least a portion of the upper surface of the housing body 80 and to cover at least a portion of the front surface of the housing body 80. That is, the seal member 75 is provided so as to cross the boundary between the upper surface 80D and the front surface 80A of the housing 80. The seal member 75 is provided with a holding portion 76, and the user can easily open and reseal the container 80 by pinching and pulling the holding portion 76.
The sealing member 75 has an adhesive portion (not shown) on one surface in the thickness direction (surface on the opposite side to the housing member 70), and is adhered (stuck) to the housing member 70 via the adhesive portion. At the time of initial opening of the container 80, the user pinches the pinching portion 76 of the seal member 75, and gradually peels off the seal member 75 from the lower side to the upper side in the up-down direction. At this time, just before the peeling of the seal member 75 proceeds to the point a on the tear line 82 shown in fig. 6B, the seal member 75 is separated from the housing member 70. When the peeling of the seal member 75 reaches the point a, the tear line 82 starts to break, and the inner portion surrounded by the tear line 82 among the housing members 70 is separated from the housing members 70 together while being adhered to the seal member 75.
As a result, the broken tear line 82 becomes the opening 81 on the front and upper surfaces of the housing member 70, and the user can take out the individual package 60 from the opening 81. When the container 80 is unsealed, the opening 81 is covered with the sealing member 75, and the sealing member 75 is adhered to the container 70 via the adhesive layer, so that the opening 81 can be resealed. Thus, the unsealing and resealing can be repeated, and the individual bags 60 can be kept clean even after the container 80 is unsealed.
Here, the housing member 70 may be a bag-like member formed of a film-like member containing at least a synthetic resin, or the packaging material 61 may be a synthetic resin film or the like, but the packaging material 61 and the housing member 70 may be formed of a sheet member containing aluminum or the like and having a lower emissivity than the non-skin-side sheet 4 of the sanitary napkin 1, for example, like the low emissivity sheet 10 of the present embodiment. In addition, the oxygen permeability of the low emissivity sheet 10 is less than 200cc/m 2 day atm, and from the viewpoint of ensuring the barrier properties of the housing member 70, it is preferable that the oxygen permeability of the housing member 70 is also less than 200cc/m 2 day atm. Thus, even when the sanitary napkin 1 having the volatile heat sensitive agent is stored in the storage member 70, the volatile component can be kept in the internal space of the storage body 80 for a long period of time without penetrating the storage member 70 more than a necessary amount. The oxygen permeability was measured by coulometry under conditions of 23 degrees and 0% rh. In addition, the packaging material 61 and the housing member 70 have the same function as the low emissivity sheet 10 of the sanitary napkin 1 in the housing body 80, and thus the volatilization suppressing effect of the entire product is easily achieved.
= = 2 Nd embodiment= = = =
Hereinafter, the pant-type absorbent article 100 according to embodiment 2 (hereinafter, also simply referred to as absorbent article 100) will be described. The pant-type absorbent article 100 of the present embodiment is a physiological absorbent article, and is different from the sanitary napkin 1 of embodiment 1 in that it is of a pant type, but the thermal agent (functional material 50) of embodiment 1, the low emissivity sheet 10, and the like are different in arrangement position and shape in embodiment 2, but are basically the same in configuration, and detailed description thereof is omitted. The absorbent article 100 of the present embodiment also includes, for example, diapers for adults and infants, and the use thereof is not limited to physiological use.
Fig. 7 is a schematic perspective view of the pant-type absorbent article 100 according to embodiment 2, and fig. 8 is a plan view of the pant-type absorbent article 100 in the unfolded state.
In the pant-type state shown in fig. 7, the absorbent article 100 has a "vertical direction", a "width direction", and a "front-rear direction" intersecting each other. The vertical direction of the paper surface in fig. 7 is defined as the up-down direction, the upper side (lower side) of the paper surface is defined as the up-down direction ("down"), and the left side (right side) of the paper surface is defined as the left (right) of the left-right direction in the width direction. In the front-rear direction, the side that becomes the abdomen side of the wearer when worn is referred to as the "front side", and the side that becomes the back side of the wearer is referred to as the "back side".
In the unfolded state of the absorbent article 100 shown in fig. 8 (state of being unfolded into a planar shape before the pant-type absorbent article 100 is formed into a pant shape), the absorbent article 100 has a "longitudinal direction", a "width direction", and a "thickness direction" intersecting each other. The longitudinal direction of the paper surface in fig. 8 is defined as the longitudinal direction, the upper side (lower side) of the paper surface is defined as the longitudinal direction "front (web side)" ("rear (back side)"), the direction orthogonal to the longitudinal direction on the paper surface is defined as the width direction, and the left side (right side) of the paper surface is defined as the width direction left (right side). The direction perpendicular to the longitudinal direction and the width direction (the direction penetrating the paper surface) is referred to as the thickness direction, and the side in contact with the skin of the wearer in the thickness direction is referred to as the "skin side", and the opposite side is referred to as the "non-skin side".
In addition, a plan view (for example, fig. 8) according to embodiment 2 shows an extended state of the object. The term "extended state" as used herein refers to the following state: by extending each elastic body (for example, crotch rubber threads 130, stretchable sheets, and the like described later) provided in the absorbent article 1, the member shown in the plan view is extended without wrinkles. For example, in fig. 8, the waist member 110 and the absorbent body 120, which are described later, are elongated until the dimensions of the waist member and the absorbent body are equal to or close to the dimensions of the individual members.
The absorbent article 100 according to embodiment 2 includes the waist member 110 and the liquid-absorbent main body 120, and a process of producing the absorbent article 100 into underpants will be described below. The absorbent body 120 is described below with respect to items. In the present embodiment, the heat sensitive agent (functional material 50') is provided in the absorbent body 120.
As shown in fig. 8, the waist member 110 has a substantially hourglass shape in a plan view in the unfolded state. That is, the center portion in the longitudinal direction is recessed toward the inside in the width direction, and the recessed portions form a pair of leg hole openings 100b shown in fig. 7 when formed into underpants.
The waistline member 110 includes a front waistline member 110f located on the front side of the center folding line CL located in the center of the absorbent article 100 in the longitudinal direction, and a rear waistline member 110b located on the rear side. The front waistline member 110f (the back waistline member 110 b) includes a waistline front end portion 110ff (a waistline back end portion 110 bf) extending in the width direction at the front (back) end portion and a front side joint portion 110fe (a back side joint portion 110 be) extending in the length direction provided at both ends in the width direction (see diagonal line diagrams in fig. 8).
The waist member 110 according to the present embodiment includes: a non-stretchable sheet 114 having a shape of the waist member 110 and having substantially no stretchability in the width direction; and an stretchable sheet 112 (front stretchable sheet 112f and rear stretchable sheet 112 b) laminated on a part of the skin side surface of the non-stretchable sheet 114 and having stretchability in the width direction. A part of the non-stretchable sheet 114 extends outward in the longitudinal direction (up-down direction) than the outer end 120et of the absorbent main body 120, and is folded back toward the skin side in the longitudinal direction and in the thickness direction at a predetermined position 110et in the longitudinal direction, and is joined in a state of being laminated on the skin side of the non-stretchable sheet 114 and the absorbent main body 120. Hereinafter, the portion where the non-stretchable sheet 114 is folded back is also referred to as a folded back portion 114r, and the predetermined position 110et where the non-stretchable sheet 114 is folded back is also referred to as an upper end 110et of the waist member 110.
The folded-back portion 114r may be a sheet member different from the non-stretchable sheet 114. That is, the folded-back portion 114r may be formed of a sheet member such as a nonwoven fabric that is separated from the non-stretchable sheet 114, instead of being formed by folding back the non-stretchable sheet 114 at the upper end 110 et.
As described above, the waist member 110 of the present embodiment includes a plurality of sheets, and at least 1 of the plurality of sheets has stretchability in the width direction. When the absorbent article 100 is worn, the waist member 110 is matched along the waist of the wearer by the stretchability.
Then, a plurality of ultrasonic bonding portions are formed by ultrasonic bonding (ultrasonic sealing) to which ultrasonic vibration and pressure are applied, whereby bonding of the plurality of pieces to each other is performed. That is, the plurality of pieces are joined by the plurality of ultrasonic joining portions that are spread in a state of overlapping in the thickness direction (front-rear direction).
In the process of producing the absorbent article 100 into underpants, first, the absorbent body 120 is disposed at a predetermined position of the waistline member 110 in the unfolded state, and the absorbent article 100 in the unfolded state is produced. That is, the non-skin side surface of the absorbent main body 120 is set as a joining surface, and the joining surface is placed on a predetermined position of the waist member 110 in the developed state and joined. That is, the waist member 110 is arranged to overlap in the thickness direction on the non-skin side of the absorbent main body 120.
The absorbent main body 120 and the waist member 110 in the developed state are folded in the longitudinal direction. That is, the absorbent main body 120 and the waist member 110 are folded in the longitudinal direction so that the skin side of the front waist member 110f faces the skin side of the rear waist member 110b with the center folding line CL shown in fig. 8 as a folding line.
In this way, since the front side joining portion 110fe and the rear side joining portion 110be of the waist member 110 are close, the left and right front side joining portions 110fe and the rear side joining portion 110be (both end portions in the width direction of the front side waist member 110f and the rear side waist member 110b are joined to each other by the joining portions (the front side joining portion 110fe and the rear side joining portion 110 be), respectively.
That is, since both widthwise end portions of the waistline member 110 are joined along the longitudinal direction, the waistline front end portion 110ff and the waistline rear end portion 110bf of the waistline member 110 form a waistline opening portion 100a on the upper side of the waistline member 110.
The pant-type absorbent article 100 is constituted by: the waistline member 110 is in contact with the front (abdomen) and back (back) of the wearer's body (in contact with the waistline of the wearer), and does not fall when worn mainly by the expansion and contraction of the waistline member 110 in the width direction (tightening against the body). Therefore, the absorbent body 120 joined to the waist member 110 is supported by the waist member 110 in the vertical direction in a state of being in contact with the crotch portion of the wearer (a portion where the absorbent body 120 is in contact with the skin of the wearer when worn, and a portion from the lower abdomen to the lumbar bones of the buttocks (buttocks) via the crotch portion).
That is, the absorbent article 1 is provided with an abdomen, a back, and a crotch, is underpants-type in which the waist opening 100a and the pair of leg hole openings 100b are formed, and is supported so as not to fall down when worn by the stretchable sheet or the like provided in the waist member 110.
The term "contact" means contact with the wearer, and the term "contact with the wearer" means contact with at least a part of the member. For example, the state in which the stretchable portion of the waistline member 110 is in contact with the wearer and the non-stretchable portion is not in contact with the wearer is the state in which the waistline member 110 is in contact with the wearer.
As a joining method for joining the absorbent main body 120 and the waist member 110 and the like, for example, known joining methods such as an adhesive, heat sealing, ultrasonic sealing, and a combination thereof can be exemplified.
< About the absorbent body 120>
Next, the absorbent body 120 will be described with reference to fig. 9 and 10. Fig. 9 is a top view of the absorbent body 120, and fig. 10 is a schematic cross-sectional view of the absorbent body 120 of fig. 9, looking A-A.
The absorbent body 120 according to the present embodiment is a physiological absorbent article, and has a similar structure to the sanitary napkin 1 according to embodiment 1. That is, the absorbent body 120 includes a liquid-absorbent core 122, and the outer peripheral surface of the absorbent core 122 is covered with a core wrap sheet 122 a.
The absorbent core 122 is obtained by molding a liquid-absorbent material into a predetermined shape, and in the present embodiment, is formed into a substantially rectangular shape in plan view (oblique line illustration in fig. 9), and has a convex shape in cross-section view (oblique line portion in fig. 10). As the liquid-absorbing material, the same material as that of the absorbent core 2 of embodiment 1 can be used. As the core wrap sheet 122a, a liquid-permeable sheet such as a tissue or a nonwoven fabric can be exemplified. The core coating sheet 122a may not be provided.
As shown in fig. 10, the absorbent main body 120 has, in addition to the absorbent core 122: a skin-side sheet 124 disposed on the skin side of the absorbent core 122; and a non-skin side sheet 125 disposed on the non-skin side with respect to the absorbent core 122. Further, between the skin side sheet 124 and the non-skin side sheet 125, a low emissivity sheet 140 having a lower emissivity than the non-skin side sheet 125 is provided. Specifically, in the present embodiment, the low emissivity sheet 140 is provided between the absorbent core 122 and the non-skin side sheet 125. The thermal sensitive agent (functional material 50') is provided in a predetermined region of the skin-side sheet 124 other than the skin side surface.
The skin-side sheet 124 is a liquid-permeable sheet member that can be brought into contact with the skin of the wearer when worn, and is formed of, for example, a hydrophilic hot air nonwoven fabric, a spunbonded nonwoven fabric, or the like. The skin side sheet 124 may have a structure of 2 layers or more. For example, a sub-sheet (not shown in fig. 10) which is a sheet member having a function substantially equivalent to that of the skin-side sheet may be provided on the non-skin side of the skin-side sheet 124.
The non-skin side sheet 125 is formed by a two-layer structure including: a liquid-impermeable sheet 125a for suppressing leakage of excreted liquid such as menstrual blood absorbed by the absorbent core 122 to the outside; and a liquid-permeable sheet 125b disposed on the non-skin side of the liquid-impermeable sheet 125 a. As the liquid-impermeable sheet 125a, for example, a resin film such as a polyethylene film or a polypropylene film may be used, and as the liquid-permeable sheet 125b, for example, a nonwoven fabric having flexibility may be used. The size of the skin side sheet 124 and the non-skin side sheet 125 are each a size covering the entire absorbent core 122.
The liquid-permeable sheet 125b of the non-skin-side sheet 125 has an extension 125c extending outward from both ends 120es of the absorbent main body 120 in the width direction. The extension portion 125c is folded back toward the skin side in the thickness direction at both ends 120es in the width direction of the absorbent main body 120 with the fulcrum 150B as a folding start point, and is folded back toward the non-skin side at the vertex 150S located closer to the skin side than the skin side sheet 124, thereby forming the three-dimensional gather 150 (see fig. 10). A three-dimensional gather elastic member 151 such as a rubber thread extending in the longitudinal direction of the absorbent body 120 is disposed in a state in which the apex 150S of the three-dimensional gather 150 extends in the longitudinal direction, and the apex 150S stands up toward the skin side of the wearer due to stretchability exhibited by the three-dimensional gather elastic member 151 when the absorbent article 100 is worn. Thus, the three-dimensional gather 150 functions as a leakage preventing wall for suppressing side leakage of excreted liquid or the like.
In order to prevent the heat sensitive agent from leaking outward, the three-dimensional gather 150 is preferably formed by forming the nonwoven fabric in the same number from the fulcrum to the apex, and more preferably 2 or more sheets.
A central elastic member 130 such as a rubber wire that can expand and contract in the longitudinal direction is provided in the widthwise central portion of the absorbent body 120 and between the liquid-impermeable sheet 125a and the liquid-permeable sheet 125b in the thickness direction. As shown in fig. 9 and 10, the central elastic member 130 is provided at the widthwise central portion of the absorbent main body 120 from the front side in contact with the lower abdomen to the rear side in contact with the buttocks via the crotch portion.
Further, a plurality of compressed portions 135 (corresponding to compressed grooves) are formed on the skin side of the absorbent body 120 (absorbent core 122). As shown in fig. 10, the compressed portion 135 has a concave shape recessed from the skin side toward the non-skin side on the skin side of the absorbent main body 120 (absorbent core 122). The concave shape of the compressed portion 135 is formed by compressing the absorbent body 120 (absorbent core 122) from the skin, for example, and serves as a compressed groove as a high-density portion having a density higher than that of the surrounding absorbent core 122.
In the present embodiment, a thermal agent (functional material 50') is provided between the skin-side sheet 124 and the absorbent core 122 in the thickness direction in the absorbent main body 120 (fig. 10). As shown in fig. 8 and 9, the thermal agent is provided along the longitudinal direction at the widthwise central portion of the absorbent body 120 (the screen mark portion in fig. 8 and 9), and has a portion overlapping the central elastic member 130 when viewed in the thickness direction. Thus, when worn, the heat sensation can be effectively provided to the vaginal opening and the vicinity of the natal cleft. The placement position of the thermal sensor is not limited to this, and may be arranged in a predetermined shape such as a planar shape, a linear shape, a spiral shape, a zigzag shape, or a dot shape at a desired place.
The low emissivity sheet 140 of embodiment 2 is provided along the longitudinal direction at the widthwise center of the absorbent body 120 between the absorbent core 122 (core-coated sheet 122 a) and the non-skin-side sheet 125 (fig. 9). In addition, the heat sensitive agent (functional material 50') and the low emissivity sheet 140 have overlapping portions when viewed in the thickness direction. By providing the low emissivity sheet 140, heat from the body is less likely to escape to the non-skin side, and the temperature is brought close to the body temperature, thereby moisturizing the skin surface. By such heat and moisture retaining effects, the thermal sensation agent is more easily volatilized, and can effectively provide a thermal sensation in the vicinity of the vaginal orifice. The length of the low emissivity sheet 140 in the width direction is set longer than the length of the region to which the thermal sensitive agent is applied, but the length in the length direction and the arrangement position are not limited thereto.
In addition, since the low emissivity sheet 140 of embodiment 2 is disposed on the non-skin side with respect to the absorbent core 122 in the thickness direction, the deterioration of the absorption performance of the absorbent core 122 due to the low emissivity sheet 140 is prevented. Further, by being located on the non-skin side of the absorbent core 122, the influence of external air can be reduced, and the heat-insulating state in the absorbent article 1 when worn can be easily stabilized.
In the present embodiment, the low emissivity sheet 140 and the central elastic member 130 have overlapping portions when viewed in the thickness direction (fig. 8 and 9). Thus, if the central elastic member 130 is contracted in the longitudinal direction when the absorbent article 1 is worn, the low emissivity sheet 140 can be reliably matched with the vaginal opening or the natal cleft, and the effect of the heat sensitive agent (functional material 50') can be improved.
In the present embodiment, the low emissivity sheet 140 is provided in at least a part of the region corresponding to the crotch region of the wearer when worn, and is configured such that perspiration in the crotch region is promoted by the low emissivity sheet 140 at an early stage after the absorbent article 1 is worn, and the skin side sheet 124 and the absorbent core 122 in the crotch region absorb perspiration. This improves the liquid permeability of the absorbent body 120, suppresses the reduction of liquid retention on the skin surface of the absorbent body 120, and improves the absorption performance by expanding the liquid diffusion area on the skin surface.
Fig. 11 shows a modification of the arrangement position of the low emissivity sheet 140 and the functional material 50' of embodiment 2. In this modification, the following structure is provided: in the region corresponding to the crotch region of the wearer during wearing, a pair of low emissivity sheets 140a, 140a and a heat sensitive agent (functional material) 50', 50' (the screen mark portion in fig. 11) are provided on both side portions of the absorbent main body 120, and the low emissivity sheet 140a and the heat sensitive agent 50' are not disposed in the vicinity of the vaginal opening.
In the present modification, the front low emissivity sheet 140b and the rear low emissivity sheet 140c are also provided at the front and rear parts in the longitudinal direction of the absorbent body 120, respectively, and the thermal sensitive agent (functional material) 50' is provided so as to have a portion overlapping the front low emissivity sheet 140b and the rear low emissivity sheet 140c, respectively, when viewed in the thickness direction (the direction penetrating the paper surface in fig. 11). The thermal sensation agent is provided on the skin side of the front low emissivity sheet 140b and the rear low emissivity sheet 140 c. The placement position of the thermal agent 50' is not limited to this, and may be any of the following: the front low emissivity sheet 140b and the rear low emissivity sheet 140c are provided on the skin side, and have portions that overlap with the respective low emissivity sheets 140a, 140b, 140c when viewed in the thickness direction.
In the present modification, the low emissivity sheets 140a, 140b, and 140c are disposed on the skin side of the absorbent core 122 in the absorbent body 120. In the case where the absorbent core 122 is disposed on the skin side, as in the present modification, the low emissivity sheets 140a, 140b, and 140c are disposed at positions avoiding the vicinity of the vaginal opening, that is, at positions where the absorption performance of the absorbent core 122 is hardly affected. Further, since the low emissivity sheets 140a, 140b, and 140c are closer to the skin side of the wearer, the body temperature can be efficiently reflected, the temperature between the body and the low emissivity sheets 140a, 140b, and 140c can be brought close to the body temperature, and the humidity can be easily increased. The thermal sensation agent 50' located on the skin side of the low emissivity panels 140a, 140b, 140c is also more likely to volatilize by such an increase in temperature and humidity, and can provide a thermal sensation to the wearer at an early stage after wearing, relative to the periphery of the vaginal opening, the lower abdomen, and the buttocks.
Fig. 12 shows another modification of the arrangement position of the low emissivity sheet 140 and the functional material 50' according to embodiment 2. In this modification, as in the example of embodiment 2 described above, the waistline member 110 includes a front waistline member 110f (one waistline member located on one side in the front-rear direction) and a rear waistline member 110b (the other waistline member located on the other side in the front-rear direction). On the other hand, the front waist member 110f has a low emissivity sheet 140x having a lower emissivity than the non-skin side sheet 114 between the folded-back portion 114r (the sheet member disposed on the skin-side most side of the one waist member) where the non-stretchable sheet 114 is folded back and the non-skin side sheet 114 (the sheet member disposed on the non-skin-side most side of the one waist member). Specifically, the low emissivity sheet 140x is disposed on the skin side of the front stretchable sheet 112f (an elastic member having stretchability in the width direction), and at least a part of the low emissivity sheet is disposed on the skin side of the absorbent body 120 in the thickness direction. The functional material 50' as the thermal sensitive agent is provided on the skin side of the low emissivity sheet 140x and on the non-skin side of the folded-back portion 114 r. In addition, the low emissivity sheet 140x and the functional material 50' have overlapping portions when viewed in the thickness direction. The low emissivity sheet 140x may be disposed on the non-skin side of the front stretchable sheet 112 f.
In the present modification, the functional material 50' is provided on the front side of the outer side end 120et (front side end) of the absorbent body 120 in the longitudinal direction, but the present invention is not limited thereto, and may be provided as follows: a part of the functional material 50' has a portion overlapping with the absorbent main body 120 when viewed in the thickness direction. In the present modification, as shown in fig. 12, the low emissivity sheet 140x is provided on the upper side of the lower end 110fed of the front side joint 110fe (joint), but is not provided on the lower side of the lower end 110fed of the front side joint 110fe (joint). According to such a configuration, the front stretchable sheet 112f having stretchability in the width direction is shrunk when worn, so that the functional material 50 'and the low emissivity sheet 140x are brought into close contact with the abdomen, thereby improving the effect of the functional material 50'. Thus, the periphery of the abdomen of the wearer can be effectively heated.
In the present modification, the low emissivity sheet 140x and the functional material 50' are provided on the front waistline member 110f, but may be provided on the rear waistline member 110b, or may be provided on both the front waistline member 110f and the rear waistline member 110 b. In the case of the rear waistline member 110b, the following structure may be used: the low emissivity sheet 140x is provided above the lower end 110bed of the rear side joining portion 110be (joining portion) in the vertical direction, and is not provided below the lower end 110bed of the rear side joining portion 110 be. Thus, the rear stretchable sheet 112b (elastic member) is contracted to thereby bring the functional material 50' and the low-emissivity sheet 140x into close contact with the body, thereby efficiently heating the waist of the wearer.
In the modification of fig. 12, for example, when the plurality of front waist members 110f having the front stretchable panel 112f are joined to each other by ultrasonic bonding (ultrasonic sealing) to which ultrasonic vibration and pressure are applied, the expansion and contraction rate of the tight portion can be reduced by tightening the pattern of the plurality of formed ultrasonic bonded portions. That is, a low stretch portion (not shown) having low stretchability in the width direction can be formed in the front waistline member 110 f. Further, by disposing the low emissivity sheet 140x so as to have a portion overlapping the low stretch section in the up-down direction, the occurrence of wrinkles or puckering of the low emissivity sheet 140x due to the front stretchable sheet 112f can be reduced, and foreign body sensation during wearing when the low emissivity sheet 140x is in close contact can be suppressed.
The front waistline member 110f (the back waistline member 110 b) of the modification of fig. 12 includes a front stretchable panel 112f (a back stretchable panel 112 b) having stretchability in the width direction, but is not limited thereto. For example, the following constitution may be adopted: a plurality of elastic members such as rubber threads that stretch in the width direction are arranged at intervals in the up-down direction (longitudinal direction) between the folded-back portion 114r (the sheet member arranged at the skin-side most position of one waist member) and the non-skin-side sheet 114 (the sheet member arranged at the non-skin-side most position of one waist member), and are fixed in a state of being stretched in the width direction, whereby the stretchability in the width direction is imparted to the waist member 110. Further, by cutting a part of the elastic member provided in this way to form a non-stretchable region that does not exhibit stretchability, for example, shrinkage of the absorbent body can be avoided, occurrence of wrinkles of the constituent material can be reduced, and the waist can be prevented from being too tightly attached. Further, if the low emissivity sheet 140x is arranged to have a portion overlapping such a non-stretchable region in the up-down direction, the occurrence of wrinkles or puckering of the elastic member in the low emissivity sheet 140x can be reduced, and foreign body sensation during wearing when the low emissivity sheet 140x is in close contact can be suppressed, as in the case of the low stretch portion described above.
= = Other= =
The above-described embodiments are for facilitating understanding of the present invention, and are not intended to limit the present invention. The present invention can be modified and improved within a range not departing from the spirit thereof, and the present invention includes, of course, equivalent structures thereof.
In the above-described embodiment, the thermal agent is used as an example of the functional material 50, but the thermal agent is not limited to this, and the functional material 50 may be, for example, a cold agent. In the case of using the cold feeling agent, the uncomfortable feeling of the wearer caused by stuffiness or sweat can be reduced.
The mechanism (mechanism) by which the above-described thermal agent is vaporized to exert its effect is similar to that of the cold agent or the perfume described later, and thus the description thereof is omitted.
As the cryopensor, for example, a type that acts on a receptor activation channel (TRPM 8) located in the cutaneous nerve can be mentioned. Examples of such cold feel agents include menthol (e.g., I-menthol) and derivatives thereof (e.g., menthol lactate), methyl salicylate, camphor, essential oils derived from plants (e.g., peppermint or eucalyptus), and the like. The cold sensitizer may be of a type that reduces the ambient temperature by the heat of vaporization. Examples of such cold feel agents include alcohols such as methanol and ethanol.
In the above embodiment, the thermal sensitive agent is used as the functional material 50, but the thermal sensitive agent is not limited to this, and for example, a perfume may be used. The fragrance may be used in place of or in combination with the thermal sensitizer. The perfume may be of the same type as conventionally used in the art.
Description of the reference numerals
1. Sanitary napkins, 1A front region, 1B rear region,
The outer end of the first part (1 e),
2. An absorbent core having a core-like shape,
2A core-coating sheet, 2fe front side end,
3. A skin side sheet, 4a non-skin side sheet,
5. A side square sheet is arranged on the side of the frame,
10. A low emissivity sheet, 10e outer end,
11. An upper side absorbent sheet, a 12 lower side absorbent sheet,
20. The wing-protecting part, the 21-wing-protecting bonding part,
25. The bonding part is provided with a plurality of bonding parts,
30. A front fin portion, a 31 fin bonding portion,
40. Linear compression parts, 41 point compression parts, 42 point compression parts,
45. The peripheral compressed portion, 46 peripheral engaging portion,
50. 50', 50A, 50b, 50c functional materials (heat sensitive agent, cold sensitive agent),
60. The individual bags, 61 packaging material,
70. The housing member, 75 sealing member,
76. The holding and pinching part is used for holding and pinching the bag,
80. A sanitary towel containing body for physiological use,
80A front, 80B side, 80C back, 80D upper surface,
81. The opening portions 82 are easily torn (opening defining portions),
100. An absorbent article of the type of underpants,
100A waist opening, 100b leg opening,
110. The waistline member, 110b rear waistline member,
110Be rear side engaging portion, 110be lower end,
110Bf waist rear end portion, 110et upper end,
110F front side waist-surrounding members, 110fe front side joining portions,
110Fed lower end, 110ff waist front end,
112. A stretchable sheet comprising a plurality of stretchable sheets,
112B, 112f,
114. A non-skin side sheet (non-stretchable sheet),
114R are folded back over the portion,
120. The absorbent body, 122 the absorbent core,
122A of the core-wrap sheet,
124. A skin side sheet, a 125 non-skin side sheet,
125A of the liquid-impermeable sheet,
125B of the liquid-permeable sheet,
The extension of 125c is provided with a pair of grooves,
130. The central elastic member is provided with a central elastic member,
135. A compression part, a compression part and a compression part,
140. 140A, 140b, 140c, 140x low emissivity sheets,
150. The three-dimensional pleats are provided with a plurality of layers,
151. A gathered elastic member.
Claims (16)
1. A sanitary napkin having a longitudinal direction, a width direction and a thickness direction which intersect each other,
The sanitary napkin includes:
A liquid-absorbent core;
A skin-side sheet disposed on the skin side of the absorbent core in the thickness direction; and
The non-skin side sheet in which the absorbent core is disposed on the non-skin side in the thickness direction is characterized in that,
A low emissivity sheet having a lower emissivity than the non-skin side sheet is provided between the skin side sheet and the non-skin side sheet,
A functional material is provided on the skin side of the low emissivity sheet in the thickness direction,
The outer end of the low emissivity sheet is positioned inside the outer end of the sanitary napkin in the width direction,
The low emissivity sheet and the functional material have overlapping portions when viewed in the thickness direction.
2. A sanitary napkin as claimed in claim 1, wherein,
In the thickness direction, the maximum length of the absorbent core is longer than the maximum length of the low emissivity sheet.
3. A sanitary napkin as claimed in claim 1 or 2, wherein,
At least a part of the low emissivity sheet is disposed on the skin side of the absorbent core in the thickness direction.
4. A sanitary napkin as claimed in claim 1 or 2, wherein,
At least a part of the low emissivity sheet is disposed on the non-skin side of the absorbent core in the thickness direction.
5. A sanitary napkin as claimed in claim 1 or 2, wherein,
The sanitary napkin has a pair of side sheets at least a part of which is joined to the skin side sheet and arranged in pairs in the width direction,
The pair of side pieces are not provided with elastic members.
6. A sanitary napkin as claimed in claim 1 or 2, wherein,
In the longitudinal direction, when the side which becomes the abdomen side of the wearer when worn is the front side and the side which becomes the back side of the wearer is the back side,
At least a part of the low emissivity sheet is provided on the front side or the rear side with respect to the absorbent core.
7. A sanitary napkin as claimed in claim 1 or 2, wherein,
When the portion where the low emissivity sheet overlaps the functional material is referred to as an overlapping region and the portion where the functional material does not overlap the low emissivity sheet is referred to as a non-overlapping region when viewed in the thickness direction,
The amount of the functional material per unit area in the overlap region is larger than the amount of the functional material per unit area in the non-overlap region.
8. A sanitary napkin as claimed in claim 1 or 2, wherein,
In the longitudinal direction, when the side which becomes the abdomen side of the wearer when worn is the front side and the side which becomes the back side of the wearer is the back side,
The low emissivity sheet is disposed on the front side of the front end of the absorbent core in the longitudinal direction,
When viewed in the thickness direction as described above,
The functional material is arranged to have a portion overlapping the absorbent core,
When the portion where the low emissivity sheet overlaps the functional material is set as the 1 st overlapping region and the portion where the absorbent core overlaps the functional material is set as the 2 nd overlapping region,
The amount of the functional material per unit area in the 2 nd overlapping region is larger than the amount of the functional material per unit area in the 1 st overlapping region.
9. A sanitary napkin as claimed in claim 1 or 2, wherein,
The functional material is a thermal agent or a cold agent,
The functional material is provided in a state of being mixed with a water-soluble solvent.
10. A sanitary napkin as claimed in claim 1 or 2, wherein,
The sanitary napkin has a pair of wing portions extending toward both outer sides in the width direction,
The flap adhesive parts to which an adhesive is applied are provided on the non-skin side in the thickness direction of the pair of flap parts,
In the longitudinal direction, when the side which becomes the abdomen side of the wearer when worn is the front side and the side which becomes the back side of the wearer is the back side,
The low emissivity sheet is provided on the front side of the flap bonding portion, and the low emissivity sheet is not provided on the rear side of the flap bonding portion.
11. A sanitary napkin as claimed in claim 10, wherein,
In the longitudinal direction, the low emissivity sheet is not provided in a region overlapping the flap adhesive portion.
12. A sanitary napkin as claimed in claim 1 or 2, wherein,
The sanitary napkin has a peripheral edge compression portion for compressing the sheet member on the skin-side and the sheet member on the non-skin side in the thickness direction along the outer peripheral edge portion in the planar shape of the sanitary napkin, or a peripheral edge joint portion for joining the sheet member on the skin-side and the sheet member on the non-skin side in the thickness direction along the outer peripheral edge portion in the planar shape of the sanitary napkin,
The low emissivity sheet does not overlap the peripheral edge compressed portion or the peripheral edge joint portion when viewed in the thickness direction.
13. A sanitary napkin holder comprising: individually packaging the sanitary napkin according to claim 1 or 2 with a sheet-like packaging material; and a housing member for housing a plurality of the individual packages, characterized in that,
The oxygen permeability of the low emissivity sheet of the sanitary napkin is less than 200cc/m 2 day atm,
The packaging material or the storage member has a lower emissivity than the non-skin side sheet of the sanitary napkin, and the packaging material or the storage member has an oxygen permeability of less than 200cc/m 2 day atm.
14. A pants-type absorbent article having a vertical direction, a width direction, and a front-rear direction intersecting each other,
The pants-type absorbent article comprises an absorbent main body having liquid absorption properties and a waist member disposed on a non-skin side of the absorbent main body in a superposed manner,
The absorbent body includes: an absorbent core; a skin-side sheet disposed on the skin side of the absorbent core; a non-skin side sheet disposed on the non-skin side of the absorbent core,
A low emissivity sheet having a lower emissivity than the non-skin side sheet is provided between the skin side sheet and the non-skin side sheet,
A functional material is provided on the skin side of the low emissivity sheet,
The absorbent main body has a central elastic member which is stretchable in the longitudinal direction of the absorbent main body in an expanded state at a central portion in the width direction of the absorbent main body on a non-skin side of the absorbent core,
The low emissivity sheet and the central elastic member have overlapping portions when viewed in a thickness direction of the absorbent body in an expanded state.
15. The pant-type absorbent article of claim 14, wherein the absorbent article comprises,
The above-described low emissivity sheet is provided in at least a portion of the region corresponding to the crotch region of the wearer when worn.
16. A pants-type absorbent article having a vertical direction, a width direction, and a front-rear direction intersecting each other,
The pants-type absorbent article comprises an absorbent main body having liquid absorption properties and a waist member which is arranged on the non-skin side of the absorbent main body in a superimposed manner and which stretches in the width direction,
The waistline member has one waistline member positioned on one side in the front-back direction and the other waistline member positioned on the other side in the front-back direction,
The two widthwise ends of the one side waistline member and the other side waistline member are joined to each other at a joint portion,
For the above-mentioned one-sided waist-surrounding member,
A low emissivity sheet having lower emissivity than the sheet member disposed at the position closest to the skin side and an elastic member having stretchability in the width direction are provided between the sheet member disposed at the position closest to the skin side and the sheet member disposed at the position closest to the non-skin side of the one waist member,
The one waistline member is provided with a functional material at a position closer to the skin than the low emissivity sheet and closer to the non-skin than the sheet member arranged at the position closest to the skin,
The low emissivity sheet is provided above the lower end of the joint in the vertical direction, and is not provided below the lower end of the joint.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022196631A JP2024082652A (en) | 2022-12-08 | Sanitary napkin, sanitary napkin container, and pants-type absorbent article | |
| JP2022-196631 | 2022-12-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118161346A true CN118161346A (en) | 2024-06-11 |
Family
ID=91346238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311569247.0A Pending CN118161346A (en) | 2022-12-08 | 2023-11-22 | Sanitary napkin, sanitary napkin holder, and pants-type absorbent article |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118161346A (en) |
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2023
- 2023-11-22 CN CN202311569247.0A patent/CN118161346A/en active Pending
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