CN213130310U

CN213130310U - Laminate, absorbent article, and laminate manufacturing device

Info

Publication number: CN213130310U
Application number: CN202020416087.1U
Authority: CN
Inventors: 川上祐介; 矶贝一成; 郭晓彤; 沈莲莲
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2019-03-29
Filing date: 2020-03-27
Publication date: 2021-05-07
Anticipated expiration: 2030-03-27
Also published as: JP2020162976A; TW202100120A; CN111743696A; CN111743696B; JP7282568B2; TWI824119B; WO2020203161A1

Abstract

The utility model provides a can guarantee the compliance of each trompil portion of the non-woven fabrics with trompil and can keep the laminate, absorbent article and the manufacturing installation of laminate of the shape of trompil after joining with other sheets. A laminate (1) comprises a sheet (3) and a nonwoven fabric (2) having a plurality of openings (5), wherein an edge portion (5a) adjacent to any one opening (5 ') of the plurality of openings (5) has at least a non-melting portion, the nonwoven fabric (2) and the sheet (3) are joined to each other by a hot-melt adhesive (6), and any one opening (5') has a region (10) overlapping with the hot-melt adhesive (6).

Description

Laminate, absorbent article, and laminate manufacturing device

Technical Field

The utility model relates to a laminate, absorbent article and laminate manufacturing device.

Background

Many absorbent articles such as disposable diapers and sanitary napkins include a liquid-impermeable sheet covering the back side of an absorbent body and a cover nonwoven fabric or the like covering the back side of the liquid-impermeable sheet to prevent permeation of absorbed liquid and ensure breathability. Patent document 1 discloses a disposable wearing article in which a cover nonwoven fabric as a perforated nonwoven fabric and a liquid-impermeable sheet as a support sheet are bonded together, and a portion where the support sheet overlaps the perforations has no hot-melt adhesive.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 6207785

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

In a member (so-called laminate) used in the disposable wearing article of patent document 1, which is formed by bonding a support sheet and a cover nonwoven fabric (perforated nonwoven fabric), the fiber density of the edge portion of each hole of the perforated nonwoven fabric is about the same as the fiber density of the portion around the hole, or the fiber density of the edge portion of each hole of the perforated nonwoven fabric is higher than the fiber density of the portion around the hole, and it is desirable that the fibers are thermally bonded to each other.

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a laminate which can maintain the shape of a hole even after joining with another sheet while ensuring flexibility of each hole portion of a nonwoven fabric having holes.

Means for solving the problems

The main utility model for achieving the above object is a laminate comprising a sheet and a nonwoven fabric having a plurality of openings, characterized in that an edge portion adjacent to one of the plurality of openings has at least a non-melting portion, and the nonwoven fabric and the sheet are joined to each other by a hot melt adhesive, and the one opening has a region overlapping with the hot melt adhesive.

Preferably, the certain opening has an elliptical shape having a major axis and a minor axis, and the major axis of the elliptical shape is parallel to the fiber orientation direction of the nonwoven fabric having the certain opening.

Preferably, the one opening has an elliptical shape having a major axis and a minor axis, and the hot melt adhesive is provided so as to straddle the one opening in the minor axis direction when a direction along the minor axis of the elliptical shape is defined as the minor axis direction.

Preferably, the laminate has a longitudinal direction and a width direction orthogonal to each other, both end portions in the width direction of the laminate include the plurality of openings, respectively, and the both end portions in the width direction of the laminate are not joined by a hot-melt adhesive.

Preferably, in the certain opening, a region overlapping with the hot melt adhesive is larger than a region not overlapping with the hot melt adhesive.

Preferably, in the certain opening, an area overlapping with the hot melt adhesive is smaller than an area not overlapping with the hot melt adhesive.

Preferably, when the certain hole is a 1 st hole and a hole which is independent of the certain hole and has a region overlapping with the hot melt adhesive is a 2 nd hole, a region overlapping with the hot melt adhesive of the 1 st hole is different from a region overlapping with the hot melt adhesive of the 2 nd hole.

Preferably, the number of openings having a region overlapping with the hot melt adhesive is larger than the number of openings having only a region not overlapping with the hot melt adhesive per unit area.

Preferably, the number of openings having a region overlapping with the hot melt adhesive is smaller than the number of openings having only a region not overlapping with the hot melt adhesive per unit area.

Preferably, the sheet is free of apertures.

Preferably, the length in the longitudinal direction and the length in the width direction of the hot melt adhesive existing region provided so as to overlap with the certain opening are both longer than the diameter of the circumscribed circle of the certain opening.

Preferably, the length of the region of the hot melt adhesive that is provided so as to overlap the certain opening in the width direction is shorter than the diameter of a circumscribed circle of the certain opening.

Preferably, the absorbent article includes an absorbent main body for absorbing liquid and the laminate according to any one of the above aspects.

Preferably, the absorbent article has a longitudinal direction and a lateral direction intersecting each other in an unfolded state, an elastic member capable of expanding and contracting in the lateral direction is provided between the nonwoven fabric and the sheet, each of the plurality of holes has an elliptical shape having a major axis and a minor axis, the elastic member and the major axis of one of the plurality of holes are parallel to the lateral direction when a direction along the minor axis of the elliptical shape is the longitudinal direction and a direction along the major axis is the lateral direction, an edge portion of the one hole extending in the lateral direction has a high density, and the hot melt adhesive is provided so as to straddle the one hole in the longitudinal direction.

Preferably, the apparatus for manufacturing a laminate includes a sheet and a nonwoven fabric having a plurality of openings, and an edge portion adjacent to one of the plurality of openings has at least a non-melting portion, and the apparatus for manufacturing a laminate includes: an application device that applies the hot-melt adhesive so as to have a region where the hot-melt adhesive overlaps the certain opening; and a joining device that joins the nonwoven fabric and the sheet material to each other with the hot-melt adhesive.

Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

Effect of the utility model

The present invention can provide a laminated body that can maintain the shape of a hole even after being joined to another sheet while ensuring the flexibility of each hole portion of a nonwoven fabric having holes.

Drawings

Fig. 1(a) is a schematic perspective view of the laminate 1, and fig. 1(b) is a view showing a state in which the laminate 1 is separated into the nonwoven fabric 2 and the sheet 3.

Fig. 2(a) is an enlarged view of a region a in fig. 1(b), and fig. 2(b) is an enlarged view of a region a in fig. 1(b) when a hot-melt adhesive is applied.

Fig. 3 is a partially enlarged view of the laminate 1.

Fig. 4(a) and 4(b) are views showing examples of the arrangement position of the hot-melt adhesive 6 when the nonwoven fabric 2 and the sheet 3 of the present embodiment are joined together.

Figure 5 is a schematic perspective view of the diaper 20.

Fig. 6 is a schematic plan view of the diaper 20 in an extended state and viewed from the skin side.

Fig. 7 is a schematic plan view of the diaper 20 in an extended state and in a developed state, as viewed from the non-skin side.

Fig. 8 is a schematic sectional view taken along line C-C in fig. 6.

Fig. 9 is a schematic plan view of the diaper 20 in an extended state in another embodiment, as viewed from the non-skin side.

Fig. 10 is a diagram illustrating the structure of a manufacturing apparatus 100 for manufacturing the laminate 1.

Description of the reference numerals

1. A laminate; 2. nonwoven fabrics (apertured nonwoven fabrics); 2a, a non-woven continuous sheet; 3. a sheet material; 3a, a continuous sheet; 5. opening a hole; 5', opening a hole (1 st hole); 5', opening a hole (2 nd hole); 5a, an edge portion; 5ah, non-melted portion; 5X, minor axis; 5Y, long axis; 6. a hot melt adhesive; 10. an area; 11. an area; 15. an end portion; 20. absorbent articles (diapers); 30. an absorbent main body; 31. an absorbent core; 32. a topsheet; 33. a back sheet; 35. an outer packaging sheet; 35bg, folded back portion; 37. an elastic member; 40. an abdominal waist portion; 50. a back-side waist portion; 40e, a side edge part; 50e, a side edge part; 60. an elastic member; 60a, a continuous elastic member; 100. a manufacturing device; 105. a roll of sheet material; 110. an elastic member engaging portion; 115. a roll of elastic member; 116. a coating device; 120. a coating device; 130. an engaging device; c1, circumscribed circle; c10, diameter; CV, conveying mechanism; h1, presence area; H1S, length in width direction; H1L, length in the longitudinal direction; HB. A waist opening; HL, opening the leg girth; LSG, three-dimensional pleating; LG, leg gathers.

Detailed Description

At least the following matters will be made clear from the description of the present specification and the drawings.

A laminate comprising a sheet and a nonwoven fabric having a plurality of openings, wherein an edge portion adjacent to any one of the plurality of openings has at least a non-melting portion, and the nonwoven fabric and the sheet are joined to each other by a hot-melt adhesive, and the opening has a region overlapping with the hot-melt adhesive.

In such a laminate, since holes are formed in the plurality of holes at a temperature not higher than the melting point, the holes are not easily melted, and at least a part of the edge portion adjacent to each hole is flexible without being hardened. The shape of the openings can be maintained by arranging the hot-melt adhesive so as to overlap the openings having such flexibility and joining the nonwoven fabric and the sheet together. By ensuring flexibility and maintaining the shape of the plurality of openings, a laminate having excellent texture and air permeability can be provided.

In the laminate, it is desirable that the certain opening has an elliptical shape having a major axis and a minor axis, and the major axis of the elliptical shape is parallel to a fiber orientation direction of the nonwoven fabric having the certain opening.

In such a laminate, when the openings are formed in the nonwoven fabric, the openings are formed so as to separate the fibers of the nonwoven fabric from each other, and therefore the fibers are gathered at the edge portions adjacent to the openings, and the basis weight of the edge portions increases. In the case where the openings are in an elliptical shape, the edge portions adjacent to the openings extend along the fiber orientation direction when the major axis of the elliptical shape is parallel to the fiber orientation direction of the nonwoven fabric, as compared to the case where the minor axis of the elliptical shape is parallel to the fiber orientation direction of the nonwoven fabric. If the difference in height of the weight per unit area is large, the shape of the openings is unstable when the nonwoven fabric is pulled, but if the difference in height is small, the openings are less likely to lose shape, and the shape is more likely to be stable. As a result, air permeability can be maintained by ensuring the holes, and the appearance of the holes is also good.

In the laminate, it is preferable that the certain hole has an elliptical shape having a major axis and a minor axis, and the hot-melt adhesive is provided so as to straddle the certain hole in the minor axis direction when a direction along the minor axis of the elliptical shape is defined as the minor axis direction.

In such a laminate, in the case where the nonwoven fabric is perforated, the perforations are formed so as to separate the fibers from each other, and therefore, a force to restore the fibers remains, but by providing the hot-melt adhesive across the perforations in the short-axis direction, the movement of the fibers toward the inside in the short-axis direction is stopped, and the shape of the perforations can be ensured. Further, when the fibers are separated from each other and perforated, the density of the edge portions adjacent to the perforations increases in the major axis direction, and therefore, by providing the hot-melt adhesive so as to extend in the minor axis direction, the edge portions having a high density can be maintained without being deformed, and the shape of the perforations can be further ensured.

In this laminate, it is desirable that the laminate has a longitudinal direction and a width direction orthogonal to each other, both end portions in the width direction of the laminate include the plurality of openings, respectively, and the both end portions in the width direction of the laminate are not joined with a hot melt adhesive.

In such a laminate, both ends having the opening are soft, and the nonwoven fabric and the sheet are not joined to each other at both ends thereof by the hot melt adhesive, so that both ends are not hardened. The end portions are mostly in direct contact with the skin, and the end portions having a high chance of being in direct contact with the skin are soft, so that the skin feels good, and the skin can be hardly damaged.

In this laminate, it is desirable that, in the certain opening, a region overlapping with the hot melt adhesive is larger than a region not overlapping with the hot melt adhesive.

In such a laminate, in one of the holes having a region overlapping with the hot melt adhesive, the shape of the hole can be further maintained in a case where the region overlapping with the hot melt adhesive is larger than the region not overlapping with the hot melt adhesive, as compared to a case where the region not overlapping with the hot melt adhesive is larger than the region not overlapping with the hot melt adhesive. The aesthetic appearance of the opening can be maintained by maintaining the shape of the opening.

In this laminate, it is desirable that, in the certain opening, a region overlapping with the hot melt adhesive is smaller than a region not overlapping with the hot melt adhesive.

In such a laminate, as compared with a case where the region not overlapping with the hot melt adhesive is smaller than the region overlapping with the hot melt adhesive, in a case where the region not overlapping with the hot melt adhesive is larger than the region overlapping with the hot melt adhesive, the overlapping with the hot melt adhesive which is likely to be an obstacle to air permeation can be reduced, and air permeability can be secured more.

In this laminate, it is preferable that when the certain hole is a 1 st hole and a hole which is independent of the certain hole and has a region overlapping with the hot melt adhesive is a 2 nd hole, a region overlapping with the hot melt adhesive of the 1 st hole is different from a region overlapping with the hot melt adhesive of the 2 nd hole.

In such a laminate, the regions of the 1 st and 2 nd holes overlapping the hot melt adhesive are different from each other, so that the regions of the holes overlapping the hot melt adhesive are not uniform. By making the thickness uneven, the portions where the hot-melt adhesive is cured are dispersed in the respective holes, and therefore, the texture of the nonwoven fabric is improved.

In this laminate, it is desirable that the number of openings having a region overlapping with the hot melt adhesive is larger than the number of openings having only a region not overlapping with the hot melt adhesive per unit area.

In such a laminate, the number of holes having a region overlapping with the hot melt adhesive is larger than the number of holes having a region overlapping with the hot melt adhesive, and thus the proportion of holes capable of maintaining the shape of the holes with the hot melt adhesive is larger. By making it possible to maintain the shape of the opening more, the appearance of the opening is also improved.

In this laminate, it is desirable that the number of openings having a region overlapping with the hot melt adhesive is smaller than the number of openings having only a region not overlapping with the hot melt adhesive per unit area.

In such a laminate, the number of openings having only the region not overlapping with the hot melt adhesive is larger than the number of openings having the region overlapping with the hot melt adhesive, thereby further ensuring air permeability.

In this laminated body, it is desirable that the sheet has no open pores.

With such a laminate, the sheet is not perforated, and the possibility of the hot melt adhesive oozing out from the perforations when joining the nonwoven fabric and the sheet can be reduced.

In the laminate, it is preferable that the length in the longitudinal direction and the length in the width direction of the region where the hot melt adhesive is present, which is provided so as to overlap the certain opening, are both longer than the diameter of the circumscribed circle of the certain opening.

In such a laminate, the length in the longitudinal direction and the length in the width direction of the region where the hot-melt adhesive is present are made larger than the diameter of the circumscribed circle of the hole, that is, the hot-melt adhesive is disposed so as to cover the entire hole, whereby the shape of the hole can be further maintained, the hole does not lose its shape, and the appearance can be maintained.

In the laminate, it is desirable that a length of the region where the hot melt adhesive is present, which is provided so as to overlap the certain opening, in the width direction is shorter than a diameter of a circumscribed circle of the certain opening.

In such a laminate, the length of the region in the width direction in which the hot-melt adhesive is present is made shorter than the diameter of the circumscribed circle of the hole, so that the hole has a region that does not overlap with the hot-melt adhesive, and a region that does not overlap is secured, whereby the air permeability can be further maintained.

An absorbent article is characterized by comprising a laminate and an absorbent main body for absorbing liquid.

By providing such an absorbent article with a laminate having excellent skin touch and air permeability, which can maintain the shape of the flexible opening, it is possible to provide an absorbent article in which the air permeability and flexibility of the waist portion are ensured and the shape of the opening can be visually recognized.

In the absorbent article, it is desirable that the absorbent article has a longitudinal direction and a lateral direction intersecting each other in a developed state, an elastic member that expands and contracts in the lateral direction is provided between the nonwoven fabric and the sheet, each of the plurality of holes has an elliptical shape having a major axis and a minor axis, the elastic member is parallel to the lateral direction with respect to the major axis of one of the plurality of holes when the direction along the minor axis of the elliptical shape is the longitudinal direction and the direction along the major axis is the lateral direction, an edge portion of the one of the holes extending in the lateral direction has a high density, and the hot-melt adhesive is provided so as to straddle the one of the holes in the longitudinal direction.

In such an absorbent article, the long axis of the opening extends in the left-right direction of the absorbent article, and therefore, even if the elastic member contracts in the left-right direction, the shape of the opening is not easily deformed. When the hole is formed, the edge portion extending in the left-right direction (major axis direction) of the hole has a high density, and the hot melt adhesive is provided so as to straddle the hole in this state along the longitudinal direction (minor axis direction). Therefore, even if the elastic member contracts in the left-right direction, the opening is easily visually recognized, and breathability can be maintained.

A method for producing a laminate comprising a sheet and a nonwoven fabric having a plurality of openings, wherein an edge portion adjacent to one of the plurality of openings has at least a non-melting portion, the method comprising: the nonwoven fabric and the sheet are joined to each other by applying the hot melt adhesive in such a manner that there is an area where the hot melt adhesive overlaps the certain opening.

In such a manufacturing method, the shape of the opening, which is flexible due to the non-melting portion of the edge portion adjacent to the opening, can be maintained and the air permeability can be improved by disposing the hot-melt adhesive so as to overlap the opening and joining the nonwoven fabric and the sheet. This makes it possible to provide a laminate which has excellent flexibility, retains the aesthetic appearance of the shape of the openings, and ensures breathability.

An apparatus for manufacturing a laminate including a sheet and a nonwoven fabric having a plurality of openings, wherein an edge portion adjacent to one of the plurality of openings has at least a non-melting portion, the apparatus comprising: an application device that applies the hot-melt adhesive so as to have a region where the hot-melt adhesive overlaps the certain opening; and a joining device that joins the nonwoven fabric and the sheet material to each other with the hot-melt adhesive.

Such a manufacturing apparatus can provide the same effects as those of the manufacturing method described above.

Embodiments of the present invention are described in detail below with reference to the accompanying drawings

< basic Structure of laminate 1 >

First, a basic structure of the laminate 1 of the present embodiment will be described. Fig. 1(a) is a schematic perspective view of the laminate 1, and fig. 1(b) is a view showing a state in which the laminate 1 is separated into the nonwoven fabric 2 and the sheet 3. Fig. 2(a) is an enlarged view of a region a in fig. 1(b), and fig. 2(b) is an enlarged view of a region a in fig. 1(b) when a hot-melt adhesive is applied. As shown in fig. 1(a) and 1(b), the laminate 1 has a two-layer structure of a nonwoven fabric 2 and a sheet 3, the nonwoven fabric 2 is a perforated nonwoven fabric having a plurality of perforations 5 penetrating through the front and back surfaces thereof at intervals, the sheet 3 is a sheet member having liquid impermeability and moisture permeability, and the nonwoven fabric 2 and the sheet 3 are joined to each other by a hot melt adhesive or the like. A specific method of joining the nonwoven fabric 2 and the sheet 3 will be described later.

Examples of the raw material fibers constituting the nonwoven fabric 2 include polypropylene (PP), Polyethylene (PE), and polyethylene terephthalate (PET). In addition, not only a single fiber such as polypropylene or polyethylene but also a composite fiber (Bico) having a sheath-core structure made of polypropylene or polyethylene can be used. Examples of the form of the nonwoven fabric include a thermal bond nonwoven fabric, a spunbond nonwoven fabric, and a spunlace nonwoven fabric. As a material constituting the sheet 3, for example, a resin film or the like can be used in addition to the same nonwoven fabric as described above, and it can also be used as a support sheet for the nonwoven fabric 2.

In the present embodiment, the nonwoven fabric 2 of the laminate 1 and the nonwoven fabric 2 of the sheet 3 have a plurality of openings 5, but a plurality of openings 5 may be provided in each of the nonwoven fabric 2 and the sheet 3.

When the nonwoven fabric 2 and the sheet 3 are formed of the thermoplastic resin fibers such as polypropylene and polyethylene, or when the sheet 3 is formed of a thermoplastic film, the apertures 5 can be formed using, for example, a heated pin member (not shown). In this case, the temperature of the pin member is usually set to be not lower than the melting point of the fiber or film material in many cases. The temperature of the pin member to be drilled is set to be not lower than the melting point of each material, and the edge portion adjacent to the drilled hole is melted and solidified to form the drilled hole. However, although the shape of the opening can be maintained by the above-described method, the opening portion may be hardened.

In this regard, in the plurality of apertures 5 formed in the nonwoven fabric 2 of the present embodiment, the temperature of the pin member (not shown) when the apertures 5 are formed is in the range of not less than the softening point of the fibers and less than the melting point thereof. This makes it difficult for the fibers in the edge portion 5a (see fig. 2 a) adjacent to the opening 5 to be fused together. The fibers can be enlarged with a microscope or the like to confirm whether or not the fibers are fused together. In the present embodiment, for example, the edge portion 5a of the opening 5 'in fig. 2(a) has the non-melted portion 5ah at least a part of which is not melted, and thus the opening 5' can have flexibility without being hardened. The position of the non-melting portion 5ah may be different for each opening 5, and all the openings 5 of the non-melting portion 5ah may be present. In the case of forming the holes in the sheet 3, similarly, the temperature of the pin member is set to be in the range of the softening point of the material or more and less than the melting point thereof, whereby the edge portion adjacent to the holes is made less likely to melt, and the edge portion is provided with at least the non-melted portion 5ah, whereby the flexibility can be maintained.

In addition, the softening point can be measured according to jis k7196 (softening temperature test method of thermoplastic films and sheets by thermo-mechanical analysis). In addition, as for the melting point, a melting peak temperature measured by DSC (differential scanning calorimetry) according to jis k7121 (method for measuring the transition temperature of plastic) can be set to the melting point described above.

The nonwoven fabric 2 and the sheet 3 of the present embodiment are joined together by the hot melt adhesive 6, and fig. 2(b) shows an example of the apertures 5 of the nonwoven fabric 2 after the hot melt adhesive 6 is applied. When one of the openings 5 'is taken as an example, the opening 5' has a region 10 (indicated by a diagonal line extending downward and leftward) overlapping with the hot melt adhesive 6. As described above, the edge 5a of the opening 5 ' (not only the openings 5 ', but also the openings 5) has at least the non-melting portion 5ah (fig. 2(a)), so that the opening 5 ' is the opening 5 having flexibility, and the shape of the opening 5 ' can be maintained by disposing the hot melt adhesive 6 so as to overlap with such an opening 5 '. Good air permeability can be ensured by maintaining the shape of the openings 5'. This makes it possible to provide a laminate 1 that can maintain the shape of the plurality of openings 5 having the region 10 overlapping with the hot-melt adhesive 6 while ensuring the flexibility of the nonwoven fabric 2 itself, and that has excellent texture and air permeability.

Examples of the hot melt adhesive include EVA type, elastomer type, olefin type, polyester/polyamide type, and the like. In the joined laminate 1, the hot melt adhesive 6 applied is exposed from the openings 5 of the nonwoven fabric 2, and therefore may stick when contacting the surface of the nonwoven fabric 2. Therefore, in order to prevent sticking, it is desirable to use a low-tack or non-tack hot-melt adhesive having a low adhesive strength (i.e., having a low adhesiveness), and a hot-melt adhesive formed using an olefin material as a base polymer can be exemplified as the low-tack or non-tack hot-melt adhesive. Further, as an application method of the hot melt adhesive, the following known application methods can be exemplified: spiral coating which can be applied in a spiral shape, omega coating which can be applied in a wave shape, slot coating (japanese: コントロールシーム painter) and the like.

When the apertures 5 ' are taken as an example, as shown in fig. 2(b), it is desirable that the apertures 5 ' have an elliptical shape having a short axis 5X and a long axis 5Y, and the long axis 5Y is parallel to the fiber orientation direction of the nonwoven fabric 2 having the apertures 5 '. Here, the fiber orientation direction refers to a direction along which the fibers of the nonwoven fabric 2 are oriented, and for example, in the case where the nonwoven fabric 2 is formed by a spunbond method, the proportion of the fibers oriented in the machine direction (MD direction) among the constituent fibers is high in the production of the nonwoven fabric. In this case, the orientation direction of the fibers of the nonwoven fabric 2 coincides with the continuous direction in which the nonwoven fabric 2 continues. Therefore, the machine direction in which the nonwoven fabric 2 is continuously conveyed is referred to as a fiber orientation direction.

When the apertures 5 are formed in the nonwoven fabric 2, the apertures 5 are formed so as to separate the fibers of the nonwoven fabric 2 from each other, and therefore, the fibers are gathered at the edge portion 5a adjacent to the apertures 5 (see fig. 2 a), and the basis weight (the amount of fibers per unit area) of the edge portion 5a becomes high. In the case where the apertures 5 are in an elliptical shape as described above, the edge portions 5a adjacent to the apertures 5 extend along the fiber orientation direction when the major axis direction (Y direction of fig. 2(b)) along the major axis 5Y is made parallel to the fiber orientation direction of the nonwoven fabric 2, as compared to the case where the minor axis direction (X direction of fig. 2(b)) along the minor axis 5X of the elliptical shape is made parallel to the fiber orientation direction of the nonwoven fabric 2, and therefore, a difference in height between the weight per unit area in the major axis direction and the weight per unit area in the minor axis direction is less likely to occur. If the difference in height between the weight per unit area in the major axis direction and the weight per unit area in the minor axis direction is large, the shape of each of the openings 5 is unstable when the nonwoven fabric 2 is pulled in the direction in which the nonwoven fabric 2 continues, but if the difference in height is small, the openings 5 are less likely to lose shape, and the shape is likely to be stable. As a result, it can be seen that each of the openings 5 can be secured, so that the air permeability can be maintained, and each of the openings 5 can be visually recognized, thereby having a function of improving the air permeability.

As shown in fig. 2 b, the hole 5 'has an elliptical shape having a short axis 5X and a long axis 5Y, and when the direction along the short axis 5X is the short axis direction (X direction), the hot melt adhesive 6 is desirably provided so as to extend across the hole 5' along the short axis direction (X direction). When the apertures 5 are formed in the nonwoven fabric 2, the apertures 5 are formed so as to separate the fibers from each other, and therefore, a force to restore the fibers remains, but by providing the hot melt adhesive 6 so as to straddle the apertures 5 in the short axis direction, the movement of the fibers toward the inner side in the short axis direction (X direction) is stopped, and the shape of the apertures 5 can be secured. Further, when the fibers are separated from each other and perforated, the density of the edge portion 5a adjacent to the perforation 5 increases in the major axis direction, and therefore, by providing the hot melt adhesive so as to extend in the minor axis direction, the edge portion 5a having a high density can be maintained without being deformed, and the shape of the perforation 5 can be further secured.

Fig. 3 is a partially enlarged view of the laminate 1 when the nonwoven fabric 2 and the sheet 3 are joined together with a hot melt adhesive. As shown in fig. 3, the laminate 1 has a longitudinal direction and a width direction orthogonal to each other, and a plurality of openings 5 are provided at both ends 15, 15 in the width direction. It is desirable that the nonwoven fabric 2 and the sheet 3 are not joined by the hot melt adhesive 6 at both

end portions

15, 15 where the plurality of openings 5 are provided. Both

end portions

15, 15 where the plurality of openings 5 exist have flexibility, and the nonwoven fabric 2 and the sheet 3 are not joined to each other at both

end portions

15, 15 by the hot melt adhesive 6, so that both

end portions

15, 15 can be made hard. In the case of using the laminate 1, the both

end portions

15, 15 are highly likely to be in direct contact with the skin, and the end portions 15 having a high chance of being in direct contact with the skin are made flexible, so that the skin feels good and the skin is less likely to be damaged.

In the opening 5 'of fig. 2(b), when a region overlapping with the hot melt adhesive 6 is a region 10 and a region not overlapping with the hot melt adhesive 6 is a region 11, it is desirable that the overlapping region 10 is larger than the non-overlapping region 11 (the total of the regions 11 in the opening 5' of fig. 2 (b)). Thus, the shape of the opening 5' can be further maintained in the case where the region 10 overlapping the hot melt adhesive 6 is larger than the region 11 not overlapping the hot melt adhesive 6, as compared to the case where the region 11 not overlapping the hot melt adhesive 6 is larger than the region 10 overlapping the hot melt adhesive 6. The aesthetic appearance of the opening 5 'can be maintained by maintaining the shape of the opening 5'.

In the opening 5', the region 10 overlapping the hot melt adhesive 6 may be made smaller than the region 11 not overlapping the hot melt adhesive 6, in contrast to the above. By providing such a configuration, as compared with a case where the region 11 not overlapping with the hot melt adhesive 6 is smaller than the region 10 overlapping with the hot melt adhesive 6, the region 11 not overlapping with the hot melt adhesive 6 is larger than the region 10 overlapping with the hot melt adhesive 6, and the overlapping with the hot melt adhesive 6 which is likely to be an obstacle to air permeation can be reduced, and air permeability can be secured more.

As shown in fig. 2(b), when a certain hole 5 'is a 1 st hole 5' and a hole having a region 10 overlapping with the hot melt adhesive 6 different from the certain hole 5 'is a 2 nd hole 5 ″, the region 10 overlapping with the hot melt adhesive 6 of the 1 st hole 5' is different from the region 10 overlapping with the hot melt adhesive 6 of the 2 nd hole 5 ″. For example, the shapes of the holes may be different from each other, or the positions of the overlapped regions 10 in the holes may be different from each other. By making the overlapping region 10 of the 1 st hole 5 'and the 2 nd hole 5 "different, the overlapping region 10 of the hot melt adhesive 6 of the holes 5' and 5" becomes uneven. If the areas 10 of the holes 5 'and 5 ″ that overlap the hot-melt adhesive 6 are uniform, hard portions may regularly be formed in the holes 5' and 5 ″ after the hot-melt adhesive 6 is cured, and the feel of the skin may be poor. Further, when the holes 5 other than the holes 5' and 5 ″ are uniformly formed, hard portions are regularly formed in the entire nonwoven fabric 2, and the entire nonwoven fabric may have a poor touch to the skin. However, since the areas 10 overlapping the hot melt adhesive 6 are uneven, the portions of the respective holes 5', 5 ″ where the hot melt adhesive 6 is cured are dispersed, and thus the texture of the nonwoven fabric 2 is improved.

In addition, in the present embodiment, it is desirable that the number of the openings 5 having the region 10 overlapping with the hot melt adhesive 6 is larger than the number of the openings 5 having only the region 11 not overlapping with the hot melt adhesive 6 per unit area. For example, when the nonwoven fabric 2 of fig. 3 is viewed in the B region, among the 12 holes 5 in the B region, 9 holes 5 having the region 10 overlapping with the hot melt adhesive 6 and 3 holes 5 having only the region 11 not overlapping with the hot melt adhesive 6 are provided. By making the number of the holes 5 having the region 10 overlapping the hot melt adhesive 6 larger than the number of the holes 5 having the region 10 overlapping the hot melt adhesive 6, the percentage of the holes 5 capable of maintaining the shape of the holes 5 by the hot melt adhesive 6 is made larger, compared to the case where the number of the holes 5 having only the region 11 not overlapping the hot melt adhesive 6 is larger than the number of the holes 5 having the region 10 overlapping the hot melt adhesive 6. By maintaining the shape of the opening 5 to a greater extent, the appearance of the opening 5 is improved, and the opening 5 can be visually recognized.

In contrast to the above, the number of the openings 5 having the region 10 overlapping the hot melt adhesive 6 per unit area may be smaller than the number of the openings 5 having only the region 11 not overlapping the hot melt adhesive 6. Compared to the case where the number of the openings 5 having only the region 11 not overlapping with the hot melt adhesive 6 is smaller than the number of the openings 5 having the region 10 overlapping with the hot melt adhesive 6, the air permeability can be further ensured by increasing the number of the openings 5 having only the region 11 not overlapping with the hot melt adhesive 6.

In the above case, the case where the sheet 3 has a plurality of open pores 5 is also considered, but the sheet 3 may not have the open pores 5. The absence of the apertures 5 in the sheet 3 can reduce the possibility that the hot melt adhesive 6 will seep out of each aperture 5 when joining the nonwoven fabric 2 and the sheet 3 together.

Fig. 4(a) and 4(b) are views showing examples of the arrangement position of the hot-melt adhesive 6 when the nonwoven fabric 2 and the sheet 3 of the present embodiment are joined together. Here, an existing region of the hot melt adhesive 6 provided so as to overlap with a certain opening 5' is denoted by H1 (region indicated by a dot pattern). The length of the existing region H1 in the longitudinal direction is H1S, and the length of the existing region H1 in the width direction is H1L. Further, a circumscribed circle C1 drawn to circumscribe a certain hole 5' has a diameter C10. Preferably, the length H1S in the longitudinal direction of the area H1 where the hot melt adhesive 6 is present is longer than the diameter C10 of the circumscribed circle C1. Further, the length H1L in the width direction of the existing region H1 is preferably longer than the diameter C10 of the circumscribed circle C1. In this way, by making the area H1 where the hot melt adhesive 6 is present larger than the diameter C10 of the circumscribed circle C1 of the hole 5 'both in the longitudinal direction and in the width direction, that is, by disposing the hot melt adhesive 6 so as to cover the entire hole 5', the shape of the hole 5 'can be further maintained, the hole 5' is not deformed, and the appearance can be maintained.

In addition, as shown in fig. 4(b), the length H1S in the width direction of the area H1 where the hot melt adhesive 6 is present, which is provided so as to overlap with a certain hole 5 ', may be shorter than the diameter C10 of the circumscribed circle C1 of the certain hole 5'. By making the length H1S in the width direction of the area H1 where the hot melt adhesive 6 is present shorter than the diameter C10 of the circumscribed circle C1 of the certain hole 5 ', the certain hole 5' has the region 11 that does not overlap with the hot melt adhesive 6, and by securing the region 11 that does not overlap, air permeability can be further maintained.

< absorbent article 20 using laminate 1 >

As an example of a specific method of using the laminate 1, an example of using the laminate 1 as an outer cover of an absorbent article will be described. Here, as the absorbent article 20, a pants-type disposable diaper 20 (hereinafter, also referred to as "diaper 20") is exemplified. Figure 5 is a schematic perspective view of the diaper 20. Fig. 6 is a schematic plan view of the diaper 20 in an extended state and viewed from the skin side. Fig. 7 is a schematic plan view of the diaper 20 in an extended state and in a developed state, as viewed from the non-skin side. Fig. 8 is a schematic sectional view taken along line C-C in fig. 6.

Here, the "developed state" described above refers to a state in which: the joining between both ends of the abdomen-side waist portion (the abdomen-side waist portion 40 described later) in the width direction (left-right direction) of the diaper 1 and both ends of the back-side waist portion (the back-side waist portion 50 described later) in the width direction (left-right direction) of the diaper 1 is released, the abdomen-side waist portion and the back-side waist portion are separated, and the diaper 20 is unfolded in the longitudinal direction thereof, thereby unfolding the diaper 20 on a plane. The "extended state" of the diaper 20 refers to a state in which the entire diaper 20 (the entire product) is extended without wrinkles, and specifically refers to a state in which: the diaper 20 is extended so that the dimensions of the respective members constituting the diaper 20 (for example, an absorbent body 30,

waist regions

40, 50, and the like described later) match the dimensions of the individual members, or the diaper 20 is extended so that the dimensions of the respective members constituting the diaper 20 are close to the dimensions of the individual members.

The diaper 20 has a vertical direction, a width direction, and a front-rear direction intersecting each other in a pants-type state shown in fig. 5. The diaper 20 is a so-called 3-sheet type disposable diaper, and includes: an absorbent main body 30 which is placed in close contact with the crotch of the wearer and absorbs liquid such as excretory fluid; an abdominal-side waistline unit 40 for covering an abdominal side of the wearer; and a back-side waistline unit 50 for covering the back side of the wearer.

In the developed state of fig. 6 and 7, the diaper 20 has a longitudinal direction and a left-right direction that intersect each other. One side in the longitudinal direction in this expanded state is also referred to as "ventral side" or "anterior side", and the other side in the longitudinal direction is also referred to as "dorsal side" or "posterior side". The longitudinal direction in the developed state is a direction that coincides with the vertical direction in the pants-type state. As shown in fig. 8, the thickness direction is a direction in which the materials constituting the diaper 20 are stacked. The side in contact with the wearer in the thickness direction is the skin side, and the opposite side is the non-skin side.

In the developed state of fig. 6, the absorbent body 30 is fixed in a state in which the absorbent body 30 is stretched between the abdomen-side waistline portion 40 and the back-side waistline portion 50 which are arranged substantially in parallel. When the diaper 20 is worn, the absorbent body 30 is folded in two at the center portion C in the longitudinal direction thereof, and the abdomen-side waistline portion 40 and the back-side waistline portion 50 facing each other are joined to each other at the left and right

side edge portions

40e and 50e, whereby the diaper 20 in a worn state in which the waistline opening HB and the pair of leg-side openings HL are formed as shown in fig. 5 is obtained.

As shown in fig. 8, the absorbent main body 30 has: an absorbent core 31 for absorbing liquid; a liquid-permeable top sheet 32 disposed so as to cover the absorbent core 31 from the skin side in the thickness direction; and a back sheet 33 disposed so as to cover the absorbent core 31 from the non-skin side in the thickness direction. An outer sheet 35 that forms an outer package of the diaper 20 is provided on the non-skin side of the absorbent body 30. Here, the laminate 1 of the present embodiment is used as the outer sheet 35 in order to improve the breathability of the diaper 20.

The absorbent core 31 is formed by laminating liquid absorbent materials, and can absorb excrement such as urine. As the liquid-absorbent material, for example, liquid-absorbent fibers such as pulp fibers can be used. The absorbent core 11 may contain, for example, a super absorbent polymer as the liquid absorbent particulate matter, or may contain a liquid absorbent material other than the liquid absorbent fiber and the liquid absorbent particulate matter. The shape of the absorbent core 31 is not limited to the shape having a substantially hourglass shape in plan view as shown in fig. 6, and may be, for example, a substantially rectangular shape in plan view. The absorbent core 31 may have a liquid-permeable core wrap sheet (not shown).

The top sheet 32 is, for example, a liquid-permeable nonwoven fabric having a planar size larger than that of the absorbent core 31. The back sheet 33 is a sheet-like member covering the absorbent core 31 from the non-skin side, and is a sheet having a planar size larger than that of the absorbent core 31. Examples of the back sheet 33 include liquid impermeable leakproof sheets such as polyethylene and polypropylene.

The laminate 1 of the present embodiment as the outer sheet 35 is provided such that the nonwoven fabric 2 side as the perforated nonwoven fabric is the side closest to the non-skin side of the diaper 20. Specifically, as shown in fig. 8, the dimension of the outer sheet 35(1) in the left-right direction is sufficiently larger than the dimension of the back sheet 33 in the left-right direction, that is, the outer sheet 35(1) is largely exposed from both sides of the back sheet 33 in the left-right direction to the left-right outside. The outer sheet 35(1) forms so-called three-dimensional gathers LSG and leg gathers LG. The three-dimensional gathers LSG are leakage-proof wall portions provided standing up at each end in the left-right direction of the top sheet 32, while the leg gathers LG are leg stretch portions formed in the leg openings HL, HL of the diaper 20. The exposed portions of the outer sheet 35(1) are folded back toward the center side in the left-right direction with both end portions in the left-right direction of the absorbent main body 30 as folded-back positions, and the leg hole gathers LG are formed by fixing the leg hole elastic members 36 such as rubber threads in the vicinity of the folded-back positions in the longitudinal direction in a state of being elongated in the longitudinal direction.

The folded-back portion 35bg (fig. 8) folded back to the center side in the left-right direction further extends to the center side in the left-right direction, and is joined to the end portion in the left-right direction of the top sheet 32 at a position covering the end portion. Further, a portion on the distal end side in the left-right direction with respect to the portion joined to the end portion can be raised from the top sheet 32 as a free end portion. Elastic members 37 such as rubber threads are fixed to the free end portions in the longitudinal direction in an extended state in the longitudinal direction, and the free end portions are contracted and raised in the longitudinal direction by a contraction force applied from the elastic members 37, thereby functioning as three-dimensional gathers LSG.

As shown in fig. 7 and 8, the laminate 1 used as the exterior sheet 35 has a structure in which the openings 5 are not provided in the right-left direction of the exterior sheet 35(1), that is, in both end portions in the width direction of the laminate 1 (the broken line portion of the exterior sheet 35(1) in fig. 8 is a region having the openings 5). By providing the plurality of openings 5 at the positions where the non-skin-side surfaces of the absorbent main body 30 are formed, the air permeability can be improved, but the plurality of openings 5 are not present in the regions outside the absorbent main body 30 in the left-right direction, in the regions where the leg gathers LG, the three-dimensional gathers LSG, and the like are formed, and the impression of leakage from the openings 5 can be avoided.

However, the position of the laminated body 1 as the outer sheet 35 where the opening 5 is provided is not limited to the above position, and there is no problem in the entire outer sheet 35 or in a smaller area.

The diaper 20 according to the present embodiment includes the laminate 1 having excellent skin touch and air permeability, which can maintain the shape of the flexible openings 5, and can ensure air permeability and flexibility of the non-skin side surface of the absorbent main body 30 for absorbing liquid. In addition, since the shape of the plurality of openings 5 can be visually recognized, a visual effect of exhibiting good air permeability can be provided to the wearer.

Fig. 9 is a schematic plan view of the diaper 20 in an extended state and in a developed state, as viewed from the non-skin side, when the laminate 1 is used in another embodiment of the diaper 20. In the present embodiment, the laminate 1 is used as the abdomen-side waistline portion 40 and the back-side waistline portion 50 of the diaper 20, and the nonwoven fabric 2 of the laminate 1 is disposed on the most non-skin side. By using the laminate 1 for the

waist portions

40 and 50, flexibility can be imparted to the

waist portions

40 and 50 which are likely to sweat, and breathability can also be improved.

A plurality of elastic members 60 that can expand and contract in the left-right direction are provided between the nonwoven fabric 2 and the sheet 3 of the laminate 1 used in the diaper 20 of fig. 9 in a state where the elastic members 60 are stretched in the left-right direction. The plurality of openings 5 of the abdomen-side waist portion 40(1) and the back-side waist portion 50(1) are elliptical shapes having a major axis and a minor axis, respectively (similar to the respective openings 5 of fig. 2 (b)). When the direction along the minor axis (5X in fig. 2 b) of the elliptical shape is the longitudinal direction of the diaper 20 and the direction along the major axis (5Y in fig. 2 b) is the lateral direction of the diaper 20, it is desirable that the major axes 5Y of the elastic members 60 and any of the plurality of openings provided in the abdomen-side waist portion 40(1) and the back-side waist portion 50(1) are parallel to the lateral direction of the diaper 20.

Further, since the holes 5 are opened so as to separate the fibers from each other, it is desirable that the hot melt adhesive 6 is provided so as to straddle at least a part of the holes 5 in the longitudinal direction of the diaper 20 (that is, so as to straddle in the short axis direction of the elliptical shape) in the laminate 1 which is the abdomen-side waist portion 40 and the back-side waist portion 50, in the edge portion 5a of the holes 5 extending in the left-right direction (so-called long axis direction) (see fig. 2a and 2 b), in which the fibers are gathered to have a high density. By disposing the hot melt adhesive 6 so as to straddle the longitudinal direction, the shape of each opening 5 in the longitudinal direction along the lateral direction of the diaper 20 can be maintained, and even if the elastic member 60 contracts in the lateral direction, the shape of the opening 5 is not easily deformed. When the holes 5 are formed, the portions of the edge portions 5a of the holes 5 extending in the left-right direction (long axis direction) have a high density due to the fiber aggregation, and the hot melt adhesive 6 is provided so as to straddle the holes 5 in the longitudinal direction (short axis direction) in this state, so that the high density regions are held, and the edge portions 5a are made highly rigid, thereby further securing the shape of the holes 5. Therefore, even if the elastic member 60 contracts in the left-right direction, the apertures 5 are easily visually recognized, and breathability can be maintained.

< method for producing laminate 1 >

Next, a method for producing the laminate 1 will be described. Fig. 10 is a diagram illustrating the structure of a manufacturing apparatus 100 for manufacturing the laminate 1. In the manufacturing apparatus 100, it is assumed that the step of joining the elastic member is included when the elastic member is disposed between the nonwoven fabric 2 and the sheet 3 of the laminate 1, but this step can be omitted when the elastic member is not disposed between the nonwoven fabric 2 and the sheet 3.

The manufacturing apparatus 100 of the present embodiment includes a conveying mechanism CV, an application device 116 for applying a hot-melt adhesive, an elastic member joining section 110, an application device 120 for applying a hot-melt adhesive 6, and a joining device 130.

The conveying mechanism CV is a conveying portion that continuously conveys the sheet 3 along a predetermined conveying path. As the conveying mechanism CV, for example, a conveying roller, an adsorption type belt conveyor having an adsorption and holding function on a belt surface as a mounting surface, or the like is used. In the following description, the continuous sheet of the conveyed sheet 3 is referred to as a continuous sheet 3 a. Hereinafter, the conveying direction of each member set in the manufacturing apparatus 100 is also referred to as "MD direction".

In manufacturing the laminate 1, first, the continuous sheet 3a is paid out from the sheet roll 105 formed by winding the continuous sheet 3a in a roll shape. The discharged continuous sheet 3a is conveyed at a predetermined conveying speed from the upstream side to the downstream side in the MD direction by the conveying mechanism CV to a position where the elastic member joint portion 110 is arranged.

On the other hand, the elastic member 60a, which is continuous in a state where a plurality of elastic members 60 such as rubber threads are connected, is fed from the elastic member roll 115 in a state of being extended in the feeding direction, and before reaching the elastic member joint portion 110, the coating device 116 coats the fed elastic member 60a with an adhesive such as a hot melt adhesive. The elastic member joining portion 110 is driven and rotated at a predetermined peripheral speed value, thereby conveying the continuous sheet 3a to the downstream side in the MD direction, and the elastic member 60a supplied separately is arranged so that the surface coated with the adhesive adheres to the continuous sheet 3a, and is joined.

Next, the continuous sheet 3a to which the elastic member 60a is bonded is conveyed further downstream in the MD direction, and the hot-melt adhesive 6 is applied to the surface of the conveyed continuous sheet 3a by the application device 120. Thereafter, the continuous sheet 3a coated with the hot-melt adhesive 6 reaches the position where the bonding device 130 is disposed.

Then, the continuous nonwoven fabric sheet 2a as a continuous sheet of the nonwoven fabric 2 is discharged from the nonwoven fabric roll 125 formed by winding the nonwoven fabric 2 as a perforated nonwoven fabric into a roll shape, and the discharged continuous nonwoven fabric sheet 2a is bonded to the surface of the continuous sheet 3a on the side to which the hot melt adhesive 6 is applied in the bonding apparatus 120, thereby performing bonding.

In this manner, in the present embodiment, the manufacturing apparatus 100 can be used to sequentially perform the above-described steps to manufacture the laminate 1.

Other embodiments are also possible

While the embodiments of the present invention have been described above, the above embodiments are intended to facilitate understanding of the present invention, and the present invention is not to be construed in a limited manner. It is to be understood that the present invention can be modified and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

In the above-described embodiment, an elliptical shape is given as an example of the shape of each opening 5, but the shape may be any shape such as a perfect circle, a rectangle, a polygon such as a rhombus, or a star.

In the above-described embodiment, the absorbent main body 30 of the diaper 20 has the back sheet 33, but the laminate 1 may be configured as follows: the back sheet 33 is not provided, the sheet 3 of the laminate 1 functions as a back sheet, and the nonwoven fabric 2 as an apertured nonwoven fabric is disposed on the non-skin side as an outer package.

In the above-described embodiment, the laminate 1 is used as the exterior sheet 35 of the diaper 20, and the three-dimensional gathers LSG and the leg gathers LG are formed by the laminate 1, but the laminate 1 may be disposed on the side closest to the skin of the diaper 20 as a sheet member different from the sheet member on which the three-dimensional gathers LSG and the leg gathers LG are formed. This makes it possible to provide the flexibility and good air permeability of the laminate 1 only at desired locations.

Claims

1. A laminate comprising a sheet and a nonwoven fabric having a plurality of openings,

the edge portion adjacent to one of the plurality of openings has at least a non-melting portion,

the nonwoven fabric and the sheet are bonded to each other using a hot-melt adhesive,

the certain opening has an area overlapping with the hot melt adhesive.

2. The laminate according to claim 1,

the certain opening is in the shape of an ellipse having a major axis and a minor axis,

the major axis of the elliptical shape is parallel to the fiber orientation direction of the nonwoven fabric having the certain opening.

3. The laminate according to claim 1 or 2,

when the direction along the minor axis of the elliptical shape is defined as a minor axis direction, the hot melt adhesive is provided so as to straddle the certain hole along the minor axis direction.

4. The laminate according to claim 1,

the laminate has a length direction and a width direction orthogonal to each other,

both end portions in the width direction of the laminated body include the plurality of openings,

the both end portions of the laminate in the width direction are not joined by a hot melt adhesive.

5. The laminate according to claim 1,

in the certain opening, a region overlapping with the hot melt adhesive is larger than a region not overlapping with the hot melt adhesive.

6. The laminate according to claim 1,

in the certain opening, an area overlapping with the hot melt adhesive is smaller than an area not overlapping with the hot melt adhesive.

7. The laminate according to claim 1,

when the certain hole is a 1 st hole and a hole which is independent of the certain hole and has a region overlapping with the hot melt adhesive is a 2 nd hole,

the region of the 1 st hole overlapping the hot melt adhesive is different from the region of the 2 nd hole overlapping the hot melt adhesive.

8. The laminate according to claim 1,

the number of openings having a region overlapping with the hot melt adhesive is greater than the number of openings having only a region not overlapping with the hot melt adhesive per unit area.

9. The laminate according to claim 1,

the number of openings having a region overlapping with the hot melt adhesive is smaller than the number of openings having only a region not overlapping with the hot melt adhesive per unit area.

10. The laminate according to claim 1,

the sheet has no apertures.

11. The laminate according to claim 1,

the length in the longitudinal direction and the length in the width direction of the hot melt adhesive existing region provided so as to overlap with the certain opening are both longer than the diameter of the circumscribed circle of the certain opening.

12. The laminate according to claim 1,

the length of the region of the hot melt adhesive overlapping the certain opening in the width direction is shorter than the diameter of the circumscribed circle of the certain opening.

13. An absorbent article characterized in that,

an absorbent article comprising an absorbent main body for absorbing liquid and the laminate according to any one of claims 1 to 12.

14. The absorbent article of claim 13,

the absorbent article has a longitudinal direction and a left-right direction intersecting each other in an unfolded state,

an elastic member capable of expanding and contracting in the left-right direction is provided between the nonwoven fabric and the sheet,

the plurality of openings are each elliptical in shape having a major axis and a minor axis,

when the direction along the minor axis of the elliptical shape is the longitudinal direction and the direction along the major axis is the left-right direction,

the elastic member and the long axis of a certain aperture of the plurality of apertures are parallel to the left-right direction,

an edge portion of the certain opening extending in the left-right direction has a high density,

the hot melt adhesive is disposed across the certain opening along the longitudinal direction.

15. A device for manufacturing a laminate comprising a sheet and a nonwoven fabric having a plurality of openings, wherein an edge portion adjacent to one of the plurality of openings has at least a non-melting portion, the device being characterized in that,

the manufacturing device of the laminated body comprises:

an application device that applies the hot-melt adhesive so as to have a region where the hot-melt adhesive overlaps the certain opening; and

a joining device that joins the nonwoven fabric and the sheet material to each other with the hot-melt adhesive.