CN111743696B

CN111743696B - Laminate, absorbent article, method for producing laminate, and apparatus for producing laminate

Info

Publication number: CN111743696B
Application number: CN202010229037.7A
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: 2023-07-28
Anticipated expiration: 2040-03-27
Also published as: JP2020162976A; WO2020203161A1; TWI824119B; JP7282568B2; CN213130310U; CN111743696A; TW202100120A

Abstract

The present invention provides a laminate, an absorbent article, a method for producing the laminate, and an apparatus for producing the laminate, wherein the laminate can ensure the softness of each perforated portion of a perforated nonwoven fabric and can maintain the perforated shape even after being joined to other sheets. The laminate (1) comprises a sheet (3) and a nonwoven fabric (2) having a plurality of openings (5), wherein the edge (5 a) adjacent to one of the openings (5) has at least a non-melted portion, the nonwoven fabric (2) and the sheet (3) are bonded to each other by a hot-melt adhesive (6), and the one of the openings (5') has a region (10) overlapping the hot-melt adhesive (6).

Description

Laminate, absorbent article, method for producing laminate, and apparatus for producing laminate

Technical Field

The present invention relates to a laminate, an absorbent article, a method for producing a laminate, and an apparatus for producing a laminate.

Background

An absorbent article such as a disposable diaper or a sanitary napkin often includes a liquid-impermeable sheet covering the back side of an absorber, a covering nonwoven fabric covering the back side of the liquid-impermeable sheet, and the like, so as to prevent the permeation of absorbed liquid and ensure breathability. Patent document 1 discloses a disposable wearing article in which a cover nonwoven fabric as an apertured nonwoven fabric and a liquid impermeable sheet as a support sheet are bonded together, and a portion where the support sheet overlaps with the apertures is provided with no hot melt adhesive.

Prior art literature

Patent literature

Patent document 1: japanese patent No. 6207785

Disclosure of Invention

Problems to be solved by the invention

In the member (so-called laminate) formed by bonding together the support sheet and the cover nonwoven fabric (apertured nonwoven fabric) used in the disposable wearing article of patent document 1, the fiber density of the edge portion of each aperture of the apertured nonwoven fabric is the same as that of the surrounding portion thereof, or the fiber density of the edge portion of each aperture of the apertured nonwoven fabric is higher than that of the surrounding portion thereof, and it is desirable that the fibers are thermally bonded to each other, but since the fibers of the edge portion of each aperture are melted and solidified, the shape of the aperture can be maintained, but the edge portion of each aperture may be hardened.

The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a laminate which can ensure flexibility of each perforated portion of a nonwoven fabric having perforations and can maintain the shape of the perforations even after being joined to other sheets.

Solution for solving the problem

The main invention for achieving the above object is a laminate comprising a sheet and a nonwoven fabric having a plurality of openings, wherein at least a non-melted portion is provided at an edge portion adjacent to one of the plurality of openings, the nonwoven fabric and the sheet are bonded to each other by a hot-melt adhesive, and the one of the openings has a region overlapping with the hot-melt adhesive.

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

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention can provide a laminate which can ensure flexibility of each perforated portion of a nonwoven fabric having perforations and can maintain the shape of the perforations even after being joined to another sheet.

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 a nonwoven fabric 2 and a sheet 3.

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

Fig. 3 is a partial enlarged view of the laminated body 1.

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

Fig. 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 as seen from the skin side.

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

Fig. 8 is a schematic cross-sectional view of C-C in fig. 6.

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

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

Description of the reference numerals

1. A laminate; 2. nonwoven (open-cell nonwoven); 2a, a nonwoven continuous sheet; 3. a sheet; 3a, a continuous sheet; 5. opening holes; 5', openings (1 st hole); 5", openings (2 nd hole); 5a, a rim portion; 5ah, non-melting portion; 5X, minor axis; 5Y, major axis; 6. a hot melt adhesive; 10. a region; 11. a region; 15. an end portion; 20. an absorbent article (diaper); 30. an absorbent body; 31. an absorbent core; 32. a top sheet; 33. a back sheet; 35. an outer packaging sheet; 35bg, a folded back portion; 37. an elastic member; 40. abdomen side waistline portion; 50. a back waistline portion; 40e, side edge portions; 50e, side edge portions; 60. an elastic member; 60a, a continuous elastic member; 100. a manufacturing device; 105. a roll of sheet material; 110. an elastic member engagement portion; 115. a roll of elastic members; 116. a coating device; 120. a coating device; 130. an engagement device; c1, circumscribing; c10, diameter; CV, conveying mechanism; h1, presence area; H1S, length in width direction; H1L, length in the length direction; HB. A waistline opening; HL, leg circumference openings; LSG, stereo pleat; LG, leg gathers.

Detailed Description

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

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-melted portion, the nonwoven fabric and the sheet are bonded to each other with a hot-melt adhesive, and the one of the openings has a region overlapping with the hot-melt adhesive.

In such a laminate, since the holes are formed at a temperature equal to or lower than the melting point of the plurality of holes, each hole is not easily melted, and at least a part of the edge portion adjacent to each hole is not hardened but has flexibility. The hot-melt adhesive is disposed so as to overlap the openings having flexibility, and the nonwoven fabric and the sheet are bonded together, whereby the shape of the openings can be maintained. By ensuring flexibility and maintaining the shape of the plurality of openings, a laminate excellent in skin feel and breathability can be provided.

In the laminate, it is desirable that the certain aperture 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 aperture.

In the case of forming the openings in the nonwoven fabric using such a laminate, 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 weight per unit area of the edge portions becomes high. In the case where the openings are elliptical, the edge portions adjacent to the openings extend along the direction of the orientation of the fibers of the nonwoven fabric when the major axes of the elliptical shapes are parallel to the direction of the orientation of the fibers of the nonwoven fabric, 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 than when the minor axes of the elliptical shapes are parallel to the direction of the orientation of the fibers of the nonwoven fabric. If the difference in weight per unit area is large, the shape of the openings is unstable when the nonwoven fabric is pulled, but if the difference in weight per unit area is small, the openings are less likely to be deformed and the shape is likely to be stabilized. As a result, the air permeability can be maintained by ensuring the openings, and the appearance of the openings is also good.

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

In the case of forming the openings in the nonwoven fabric, the laminate is used to form the openings so that the fibers are separated from each other, and therefore, the force to restore the fibers remains, but the movement of the fibers to the inside in the short axis direction can be stopped by providing the hot-melt adhesive so as to cross the openings in the short axis direction, and the shape of the openings can be ensured. In addition, when the fibers are separated from each other to form the hole, the density of the edge portion adjacent to the hole increases in the long axis direction, and therefore, by providing the hot melt adhesive so as to cross the short axis direction, the edge portion having a high density can be maintained so as not to be deformed, and the shape of the hole can be further ensured.

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

With such a laminate, both end portions having openings are soft, and the nonwoven fabric and the sheet are not joined by the hot melt adhesive at both end portions, so that both end portions are not hardened. The end is often in direct contact with the skin, and the end which is in direct contact with the skin is soft, so that the touch feeling of the skin is good, and the skin is not easy to damage.

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

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

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

With such a laminate, the overlap with the hot-melt adhesive, which is likely to be a barrier to ventilation, can be reduced and ventilation can be ensured more than in the case where the area not overlapping the hot-melt adhesive is smaller than the area overlapping the hot-melt adhesive, and the area not overlapping the hot-melt adhesive is larger than the area overlapping the hot-melt adhesive.

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

In such a laminate, the regions overlapping the hot-melt adhesive in the 1 st hole and the 2 nd hole are made different from each other, so that the regions overlapping the hot-melt adhesive in the holes are made uneven. By making the pores uneven, the cured portions of the hot-melt adhesive are dispersed in the pores, and thus the skin feel of the nonwoven fabric is improved.

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

In such a laminate, the number of openings having a region overlapping the hot-melt adhesive is increased, so that the proportion of openings in which the shape of the openings can be maintained by the hot-melt adhesive is increased, as compared with the case where the number of openings having only a region not overlapping the hot-melt adhesive is increased. The shape of the opening can be maintained more, and thus the opening has a good appearance.

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

In such a laminate, the number of openings having only the region not overlapping the hot-melt adhesive is increased as compared with the case where the number of openings having only the region not overlapping the hot-melt adhesive is smaller than the number of openings having the region overlapping the hot-melt adhesive, so that the air permeability can be further ensured.

In the laminate, it is desirable that the sheet has no openings.

With such a laminate, no openings are provided in the sheet, and thus the possibility of the hot melt adhesive oozing out of the openings when joining the nonwoven fabric and the sheet together can be reduced.

In this laminate, it is desirable 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 with the certain hole, are both longer than the diameter of the circumscribed circle of the certain hole.

With 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 become deformed, and the beautiful appearance can be maintained.

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

With such a laminate, the length in the width direction of the region where the hot-melt adhesive is present is made shorter than the diameter of the circumscribed circle of a certain hole, whereby a certain 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 body for absorbing liquid.

By providing such an absorbent article with a laminate having excellent skin touch and breathability, which can maintain the shape of the openings having flexibility, breathability and flexibility of the waist portion can be ensured, and the shape of the openings 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 the developed state, an elastic member extending and contracting in the lateral direction is provided between the nonwoven fabric and the sheet, the plurality of openings each have an elliptical shape having a major axis and a minor axis, and 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, the long axes of the elastic member and one of the plurality of openings are parallel to the lateral direction, edges of the one opening extending in the lateral direction are high-density, and the hot-melt adhesive is provided so as to cross the one opening along the longitudinal direction.

With such an absorbent article, the long axis of the aperture extends in the lateral direction of the absorbent article, and therefore, even if the elastic member contracts in the lateral direction, the aperture shape is less likely to be deformed. When the hole is formed, the edge portion extending in the left-right direction (long axis direction) of the hole is made high-density, and in this state, the hot-melt adhesive is provided so as to cross the hole in the longitudinal direction (short axis direction), so that the edge portion is made high-rigidity, and the shape of the hole is further ensured. Thus, even if the elastic member contracts in the left-right direction, the opening is easily visually recognized, and the air permeability can be maintained.

A method for producing a laminate comprising a sheet and a nonwoven fabric having a plurality of openings, wherein at least a non-melted portion is provided at an edge portion adjacent to any one of the plurality of openings, characterized by comprising the steps of: the nonwoven fabric and the sheet are bonded to each other by applying the hot melt adhesive in such a manner that the hot melt adhesive has a region overlapping the certain opening.

By such a manufacturing method, the hot-melt adhesive is disposed so as to overlap the openings, and the nonwoven fabric and the sheet are bonded together, whereby the shape of the openings, which are flexible due to the non-melted portions of the edges adjacent to the openings, can be maintained, and the air permeability can be improved. This can provide a laminate which is excellent in flexibility, can maintain the beautiful shape of the openings, and can ensure air permeability.

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

With such a manufacturing apparatus, the same operational effects as in the case of the aforementioned manufacturing method can be achieved.

= = embodiment= = = =

Basic structure of laminate 1

First, the 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 a nonwoven fabric 2 and a sheet 3. Fig. 2 (a) is an enlarged view of the area a of fig. 1 (b), and fig. 2 (b) is an enlarged view of the area a of fig. 1 (b) when the hot melt adhesive is applied. As shown in fig. 1 (a) and 1 (b), the laminate 1 has a double-layer structure including a nonwoven fabric 2 and a sheet 3, the nonwoven fabric 2 is an open-cell nonwoven fabric having a plurality of open cells 5 penetrating the front and back 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 bonded to each other by a hot melt adhesive or the like. The specific method of joining the nonwoven fabric 2 and the sheet 3 together 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 individual fibers such as polypropylene and polyethylene but also composite fibers (bicomponent fibers, bico) having a sheath-core structure made of polypropylene and polyethylene can be used. Examples of the form of the nonwoven fabric include thermally bonded nonwoven fabric, spun bonded nonwoven fabric, and spun bonded nonwoven fabric. As a material constituting the sheet 3, for example, a resin film or the like may be used in addition to the nonwoven fabric similar to that described above, and it is also possible to use the same 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.

In addition, 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, for example, the openings 5 can be formed using a heated pin member (not shown) or the like. In this case, the temperature of the pin member is usually set to be equal to or higher than the melting point of the fiber or film material. The pin member to be perforated is brought to a temperature equal to or higher than the melting point of each material, whereby the edge portion adjacent to the perforation is melted and solidified to form the perforation. However, although the shape of the opening can be maintained by the above-described method, the opening portion is likely to be hardened.

In this regard, the temperature of the pin member (not shown) at the time of forming the holes 5 is in the range of the softening point of the fibers or more and less than the melting point thereof with respect to the plurality of holes 5 formed in the nonwoven fabric 2 of the present embodiment. Thus, the fibers at the edge 5a (see fig. 2 (a)) adjacent to the opening 5 are not easily fused together. The fibers can be magnified with a microscope or the like to confirm whether the fibers are fused with each other. In the present embodiment, for example, the edge 5a of the hole 5 'in fig. 2 (a) has at least a part of the unmelted portion 5ah, and thus the hole 5' can have flexibility without hardening. The position of the non-melted portion 5ah may be different for each of the openings 5, and all of the openings 5 of the non-melted portion 5ah may be present. In addition, in the case of forming the openings in the sheet 3, similarly, the temperature of the pin member is in the range of not less than the softening point of the material and less than the melting point thereof, so that the edge portion adjacent to the openings is not easily melted, and the edge portion has at least the non-melted portion 5ah, whereby flexibility can be maintained.

In addition, as for the softening point, measurement can be made according to jis k7196 (softening temperature test method of thermoplastic films and sheets realized by thermo-mechanical analysis). In addition, as for the melting point, the melting peak temperature measured by DSC (differential scanning calorimetry) according to JISK7121 (a method of measuring a transition temperature of plastics) can be set as the above-described melting point.

Further, the nonwoven fabric 2 and the sheet 3 of the present embodiment are bonded together with the hot-melt adhesive 6, and fig. 2 (b) shows an example of the openings 5 of the nonwoven fabric 2 after the hot-melt adhesive 6 is applied. When a certain hole 5 'of the holes 5 is taken as an example, the hole 5' has a region 10 (a portion indicated by a diagonal line toward the lower left) overlapping with the hot-melt adhesive 6. Since the edge 5a of the hole 5' (not only the hole 5', but also the holes 5) has at least the non-melted portion 5ah (fig. 2 (a)) as described above, the hole 5' is the hole 5 having flexibility, and the shape of the hole 5' can be maintained by disposing the hot-melt adhesive 6 so as to overlap with the hole 5 '. By maintaining the shape of the openings 5', good breathability can be ensured. This can provide a laminate 1 which can maintain the shape of a plurality of openings 5 having regions 10 overlapping with a hot-melt adhesive 6 while ensuring the flexibility of a nonwoven fabric 2 itself, and which is excellent in skin touch and air permeability.

As the hot melt adhesive, for example, EVA-based, elastomer-based, olefin-based, polyester-polyamide-based, and the like can be used. Further, in the bonded laminate 1, the hot-melt adhesive 6 applied is exposed from the openings 5 of the nonwoven fabric 2, and therefore may adhere when contacting the surface of the nonwoven fabric 2. Therefore, in order to prevent sticking, it is desirable to use a low-tack type or non-tack type hot-melt adhesive having a small adhesive force (i.e., a low tackiness), and as the low-tack type or non-tack type hot-melt adhesive, a hot-melt adhesive formed using an olefin-based material as a base polymer can be exemplified. As a method for applying the hot melt adhesive, the following known application method can be exemplified: spiral coating which can be applied in a spiral shape, omega coating which can be applied in a wavy shape, slot coating (japanese: コ on) and the like.

In addition, as shown in fig. 2 (b), when the aperture 5' is taken as an example, it is desirable that the aperture 5' has an elliptical shape having a short axis 5X and a long axis 5Y, and that the long axis 5Y is parallel to the fiber orientation direction of the nonwoven fabric 2 having the aperture 5 '. The fiber orientation direction refers to a direction along which fibers of the nonwoven fabric 2 are oriented, and when the nonwoven fabric 2 is a nonwoven fabric formed by a spunbond method, for example, the ratio of fibers oriented in the machine direction (MD direction) among constituent fibers thereof is high at the time of manufacturing 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 is continuous. Thus, the mechanical direction in which the nonwoven fabric 2 is continuously conveyed is referred to as a fiber orientation direction herein.

When the openings 5 are formed in the nonwoven fabric 2, the openings 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 5a (see fig. 2 (a)) adjacent to the openings 5, and the weight per unit area (fiber amount per unit area) of the edge 5a increases. In the case where the aperture 5 is in the elliptical shape as described above, the edge 5a adjacent to the aperture 5 is extended in the fiber orientation direction when the major axis direction (Y direction in fig. 2 (b)) along the major axis 5Y is 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 than when the minor axis direction (X direction in fig. 2 (b)) of the elliptical shape along the minor axis 5X is parallel to the fiber orientation direction of the nonwoven fabric 2. If the difference in height between the weight per unit area in the long axis direction and the weight per unit area in the short axis direction is large, the shape of each aperture 5 becomes unstable when the nonwoven fabric 2 is pulled in the continuous direction of the nonwoven fabric 2, but if the difference in height is small, the aperture 5 is less likely to be deformed and the shape is more likely to be stabilized. As a result, it can be seen that the respective openings 5 can be ensured, and the air permeability can be maintained, and the respective openings 5 can be visually recognized, so that the function of improving the air permeability is provided.

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 defined as the short axis direction (X direction), it is desirable that the hot melt adhesive 6 be provided so as to cross the hole 5' along the short axis direction (X direction). In the case where the openings 5 are formed in the nonwoven fabric 2, the openings 5 are formed so as to separate the fibers from each other, and therefore, a force for restoring the fibers remains, but the movement of the fibers to the inside in the short axis direction (X direction) can be stopped by providing the hot melt adhesive 6 so as to cross the openings 5 in the short axis direction, and the shape of the openings 5 can be ensured. In addition, when the fibers are separated from each other to form the hole, the density of the edge portion 5a adjacent to the hole 5 increases in the long axis direction, and therefore, by providing the hot melt adhesive so as to cross the short axis direction, the edge portion 5a having a high density can be maintained so as not to be deformed, and the shape of the hole 5 can be further ensured.

Fig. 3 is a partially enlarged view of the laminate 1 when the nonwoven fabric 2 and the sheet 3 are bonded together with a hot melt adhesive. As shown in fig. 3, the laminated body 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 ends 15, 15 where the plurality of openings 5 are provided. The two ends 15, 15 having the plurality of openings 5 have flexibility, and the nonwoven fabric 2 and the sheet 3 are not joined by the hot melt adhesive 6 at the two ends 15, so that the two ends 15, 15 can be hardly hardened. When the laminate 1 is used, the possibility that the both end portions 15, 15 are in direct contact with the skin is high, and the softness of each end portion 15 having a high chance of being in direct contact with the skin makes the skin feel good, and the skin is less likely to be damaged.

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

In the openings 5', the area 10 overlapping the hot-melt adhesive 6 may be smaller than the area 11 not overlapping the hot-melt adhesive 6, contrary to the above. By providing this, the overlap with the hot-melt adhesive 6, which is likely to be a barrier to ventilation, can be reduced and ventilation can be ensured more than in the case where the region 11 not overlapping the hot-melt adhesive 6 is smaller than the region 10 overlapping the hot-melt adhesive 6, and the region 11 not overlapping the hot-melt adhesive 6 is larger than the region 10 overlapping the hot-melt adhesive 6.

As shown in fig. 2 (b), when a hole 5 'is defined as a 1 st hole 5' and a hole having a region 10 overlapping the hot-melt adhesive 6, which is different from the hole 5', is defined as a 2 nd hole 5", the region 10 overlapping the hot-melt adhesive 6 of the 1 st hole 5' is different from the region 10 overlapping the hot-melt adhesive 6 of the 2 nd hole 5". For example, the respective shapes may be different, or the positions of the overlapping regions 10 in the respective openings may be different. By making the overlapping regions 10 of the 1 st hole 5 'and the 2 nd hole 5 "different, the regions 10 of the holes 5' and 5" overlapping the hot melt adhesive 6 become uneven. If the areas 10 of the holes 5 'and 5″ overlapping the hot melt adhesive 6 are uniform, the holes 5' and 5″ may regularly generate hard spots after the hot melt adhesive 6 is cured, and there is a possibility that the skin feel may be poor. If the holes 5 other than the holes 5' and 5″ are uniform, hard portions are regularly formed in the entire nonwoven fabric 2, and there is a possibility that the entire nonwoven fabric may have poor skin touch. However, by making the region 10 overlapping the hot-melt adhesive 6 uneven, the hardened portions of the hot-melt adhesive 6 are dispersed in the holes 5', 5″ so that the skin feel of the nonwoven fabric 2 is improved.

In the present embodiment, it is desirable that the number of the openings 5 having the region 10 overlapping the hot melt adhesive 6 per unit area is larger than the number of the openings 5 having only the region 11 not overlapping the hot melt adhesive 6. As an example, when viewing the B region of the nonwoven fabric 2 in fig. 3, out of the 12 openings 5 in the B region, 9 openings 5 having the region 10 overlapping the hot-melt adhesive 6 are provided, and only 3 openings 5 having the region 11 not overlapping the hot-melt adhesive 6 are provided. By increasing the number of the openings 5 having the region 10 overlapping the hot-melt adhesive 6, the proportion of the openings 5 in which the shape of the openings 5 can be maintained by the hot-melt adhesive 6 is increased, compared to the case where the number of the openings 5 having only the region 11 not overlapping the hot-melt adhesive 6 is greater than the number of the openings 5 having the region 10 overlapping the hot-melt adhesive 6. The shape of the opening 5 can be maintained more, and thus the appearance of the opening 5 is improved, and the opening 5 can be visually recognized further.

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

In the above case, a case where the sheet 3 has a plurality of openings 5 is also considered, but the sheet 3 may not have the openings 5. The openings 5 are not present in the sheet 3, so that the possibility of the hot melt adhesive 6 oozing out of each opening 5 when joining the nonwoven fabric 2 and the sheet 3 together can be reduced.

Fig. 4 (a) and 4 (b) are diagrams showing examples of the arrangement positions of the hot melt adhesive 6 when the nonwoven fabric 2 and the sheet 3 according to the present embodiment are joined together. Here, the region where the hot melt adhesive 6 is provided so as to overlap with a certain hole 5' is denoted by H1 (region indicated by a dot pattern). The length of the existence region H1 in the longitudinal direction is H1S, and the length of the existence region H1 in the width direction is H1L. The diameter of the circumscribed circle C1 drawn so as to circumscribe the hole 5' is C10. Preferably, the length H1S in the longitudinal direction of the region H1 where the hot melt adhesive 6 is present is longer than the diameter C10 of the circumscribed circle C1. Further, it is preferable that the length H1L in the width direction of the existence region H1 is longer than the diameter C10 of the circumscribed circle C1. In this way, the existence region H1 of the hot-melt adhesive 6 is made larger than the diameter C10 of the circumscribing circle C1 of the hole 5 'both in the longitudinal direction and in the width direction, that is, the hot-melt adhesive 6 is disposed so as to cover the entire hole 5', whereby the shape of the hole 5 'can be further maintained, the hole 5' is prevented from being deformed, and the beautiful appearance can be maintained.

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

< absorbent article 20 Using laminate 1 >)

As an example of a specific use method of the laminate 1, an example of using the laminate 1 as an outer package material for 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. Fig. 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 as seen from the skin side. Fig. 7 is a schematic plan view of the diaper 20 in an extended state as seen from the non-skin side. Fig. 8 is a schematic cross-sectional view of C-C in fig. 6.

Here, the "deployment state" described above refers to the following state: the diaper 20 is developed on a flat surface by releasing the engagement between both ends of the abdomen-side waistline portion (abdomen-side waistline portion 40 described later) in the width direction (left-right direction) of the diaper 1 and both ends of the back-side waistline portion (back-side waistline portion 50 described later) in the width direction (left-right direction) of the diaper 1, separating the abdomen-side waistline portion and the back-side waistline portion, and opening the diaper 20 along the length direction thereof. The "extended state" of the diaper 20 refers to a state in which the entire diaper 20 (the entire product) is extended to be free of wrinkles, specifically, to be in the following state: the diaper 20 is stretched to a size that matches the size of the individual members (e.g., the absorbent main body 30, the waistline units 40, 50, etc.) that constitute the diaper 20, or the diaper 20 is stretched to a size that approximates the size of the individual members that constitute the diaper 20.

The diaper 20 has a top-bottom direction, a width direction, and a front-back direction intersecting each other in the pants-type state shown in fig. 5. The diaper 20 is a so-called 3-piece disposable diaper, and includes: an absorbent main body 30 which is placed against the crotch of the wearer and absorbs liquid such as excretory fluid; a abdomen-side waist part 40 for covering an abdomen-side part of the wearer; and a back waistline portion 50 for covering the back side portion of the wearer.

In the unfolded state of fig. 6 and 7, the diaper 20 has a longitudinal direction and a left-right direction intersecting each other. One side in the longitudinal direction in this expanded state is also referred to as "ventral side" or "front side", and the other side in the longitudinal direction is also referred to as "back side" or "rear side". The longitudinal direction in the developed state is a direction that coincides with the up-down direction in the pants-type state. As shown in fig. 8, the thickness direction is a direction in which materials constituting the diaper 20 are laminated. The side in contact with 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 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 main body 30 is folded in half at the central portion C in the longitudinal direction thereof, and the abdomen-side waistline portion 40 and the back-side waistline portion 50 which face each other are joined to each other at the side edge portions 40e and 50e in the lateral direction, so that the diaper 20 in a worn state in which the waistline opening HB and the pair of leg-surrounding 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 configured to cover the absorbent core 31 from the non-skin side in the thickness direction. An exterior sheet 35 forming an exterior of the diaper 20 is provided on the non-skin side of the absorbent body 30. Here, in order to improve the breathability of the diaper 20, the laminate 1 of the present embodiment is used as the exterior sheet 35.

The absorbent core 31 is a member formed by stacking liquid absorbent materials, and can absorb excrement such as urine. As the liquid-absorbent raw material, for example, liquid-absorbent fibers such as pulp fibers can be used. The absorbent core 11 may contain, for example, a superabsorbent polymer as the liquid-absorbent particulate matter, or may contain a liquid-absorbent material other than the liquid-absorbent fibers 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 a plan view as shown in fig. 6, and may have a substantially rectangular shape in a plan view, for example. 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 larger planar dimension than the absorbent core 31. The back sheet 33 is a sheet-like member that covers the absorbent core 31 from the non-skin side, and has a larger planar size than the absorbent core 31. As an example of the back sheet 33, a liquid impermeable leak-proof sheet of polyethylene, polypropylene or the like can be given.

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

The folded-back portion 35bg (fig. 8) folded back on the center side in the left-right direction further extends on the center side in the left-right direction, and is joined to the end portion of the cover sheet 32 at a position covering the end portion in the left-right direction. The portion on the distal end side in the left-right direction than the portion joined to the end portion can stand up from the top sheet 32 as a free end portion. An elastic member 37 such as a rubber string is fixed to each of the free end portions in the longitudinal direction in a state of being elongated 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 member 37, whereby the elastic member functions as a three-dimensional gather LSG.

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

However, the position of the opening 5 of the laminate 1 as the outer sheet 35 is not limited to the above-described position, and there is no problem in the whole outer sheet 35 or in a smaller area.

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

Fig. 9 is a schematic plan view of the diaper 20 in an extended state when the laminate 1 is used in another embodiment of the diaper 20, as viewed from the non-skin side. 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 closest to the non-skin side. By using the laminate 1 for the waistline units 40 and 50, flexibility can be imparted to the waistline units 40 and 50 which are prone to perspiration, and breathability can also be improved.

Further, a plurality of elastic members 60 that can extend 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 in which the elastic members 60 extend in the left-right direction. The plurality of openings 5 of the abdomen-side waistline portion 40 (1) and the back-side waistline portion 50 (1) have elliptical shapes having a major axis and a minor axis (similar to the openings 5 of fig. 2 b). Further, 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 axis 5Y of each elastic member 60 and any one of the plurality of openings 5' provided in the abdomen-side waist section 40 (1) and the back-side waist section 50 (1) be parallel to the lateral direction of the diaper 20.

Further, since the openings 5 are formed so as to separate fibers from each other, it is desirable that the hot-melt adhesive 6 is provided so as to span at least a part of the openings 5 in the longitudinal direction of the diaper 20 (that is, so as to span in the minor axis direction of the elliptical shape) in the laminate 1, which is the abdomen-side waistline portion 40 and the back-side waistline portion 50, in the edge portion 5a of the opening 5 extending in the lateral direction (so-called long axis direction) (see fig. 2 (a) and 2 (b)) in which fibers are gathered to have a high density. By disposing the hot melt adhesive 6 so as to straddle in the longitudinal direction, the shape of each of the openings 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 less likely to be deformed. When the hole 5 is formed, the portion of the edge 5a of the hole 5 extending in the left-right direction (long axis direction) is dense due to the aggregation of fibers, and in this state, the hot-melt adhesive 6 is provided so as to cross the hole 5 in the longitudinal direction (short axis direction), and therefore, the region of high density is held, and the edge 5a is made to have high rigidity, thereby further securing the shape of the hole 5. Thus, even if the elastic member 60 is contracted in the left-right direction, the opening 5 is easily visually recognized, and the air permeability can be maintained.

Method for producing laminate 1

Next, a method of manufacturing the laminate 1 will be described. Fig. 10 is a diagram illustrating a structure of a manufacturing apparatus 100 for manufacturing the laminated body 1. In the manufacturing apparatus 100, it is assumed that the step of joining the elastic members is included in the case where the elastic members are disposed between the nonwoven fabric 2 and the sheet 3 of the laminate 1, but this step can be omitted in the case where the elastic members are 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 joint 110, an application device 120 for applying a hot-melt adhesive 6, and a joint 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, a suction belt conveyor having a suction 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 3a. The conveyance direction of each member set in the manufacturing apparatus 100 is also referred to as "MD direction" hereinafter.

In manufacturing the laminate 1, first, the continuous sheet 3a is unwound from a sheet roll 105 formed by winding the continuous sheet 3a into a roll. The released continuous sheet 3a is conveyed by the conveying mechanism CV from the upstream side to the downstream side in the MD direction at a predetermined conveying speed to reach 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 together, is conveyed from the elastic member roll 115 in a state where it is elongated in the conveying direction, and before it reaches the elastic member joint portion 110, the coating device 116 applies an adhesive such as a hot melt adhesive to the conveyed elastic member 60 a. The elastic member joining portion 110 is driven to rotate at a predetermined circumferential velocity value, whereby the continuous sheet 3a is conveyed to the downstream side in the MD direction, and the elastic member 60a that is additionally supplied is disposed so that the adhesive-coated surface adheres to the continuous sheet 3a, and joined.

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

Then, the nonwoven fabric continuous 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, and the discharged nonwoven fabric continuous 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 device 120, thereby bonding.

As described above, 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= = = =

The embodiments of the present invention have been described above, but the embodiments are for facilitating understanding of the present invention, and the present invention is not limited to the embodiments. It is to be understood that the present invention can be modified and improved without departing from the gist thereof, and equivalents thereof are included in the present invention.

In the above-described embodiment, an elliptical shape is exemplified as an example of the shape of each opening 5, but the shape may be any shape such as a polygonal shape such as a perfect circle, a rectangle, or a diamond, 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 is made to function as a back sheet, and the nonwoven fabric 2 as a perforated nonwoven fabric is disposed on the non-skin side as an exterior body.

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 surface of the diaper 20 closest to the skin as a sheet member different from the sheet member forming the three-dimensional gathers LSG and the leg gathers LG. This can provide flexibility and excellent air permeability of the laminate 1 only at desired positions.

Claims

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

the rim portion adjacent to one of the plurality of openings has at least a non-melted portion,

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

the certain opening has a region overlapping the hot melt adhesive,

the aperture is of an oval shape having a major axis and a minor axis,

when the direction along the short axis of the elliptical shape is set as the short axis direction and the direction along the long axis of the elliptical shape is set as the long axis direction,

the hot melt adhesive is disposed so as to cross the certain opening in the short axis direction and not to cross the certain opening in the long axis direction,

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

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

2. The laminate of claim 1, wherein the laminate is formed by a process comprising,

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

3. The laminate of claim 1, wherein the laminate is formed by a process comprising,

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

the laminate includes the plurality of openings at both ends in the width direction thereof,

the two ends in the width direction of the laminate are not joined with a hot melt adhesive.

4. The laminate of claim 1, wherein the laminate is formed by a process comprising,

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

5. The laminate of claim 1, wherein the laminate is formed by a process comprising,

in the certain hole, a region overlapping with the hot melt adhesive is smaller than a region not overlapping with the hot melt adhesive.

6. The laminate of claim 1, wherein the laminate is formed by a process comprising,

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

7. The laminate of claim 1, wherein the laminate is formed by a process comprising,

the sheet has no openings.

8. The laminate of claim 1, wherein the laminate is formed by a process comprising,

the length in the longitudinal direction and the length in the width direction of the region where the hot melt adhesive is present, which are provided so as to overlap the certain hole, are longer than the diameter of the circumscribed circle of the certain hole.

9. The laminate of claim 1, wherein the laminate is formed by a process comprising,

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 hole, is shorter than the diameter of the circumscribed circle of the certain hole.

10. An absorbent article, characterized in that,

the absorbent article comprising an absorbent body for absorbing a liquid and the laminate according to any one of claims 1 to 9.

11. The absorbent article as set forth in claim 10 wherein,

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

an elastic member that can stretch in the left-right direction is provided between the nonwoven fabric and the sheet,

the plurality of openings are respectively 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 lateral direction,

the elastic member is parallel to the longitudinal axis of one of the plurality of openings in the left-right direction,

the edge of the hole extending in the left-right direction is of high density,

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

12. A method for producing a laminate comprising a sheet and a nonwoven fabric having a plurality of openings, wherein at least a non-melted portion is provided at an edge portion adjacent to any one of the plurality of openings,

the manufacturing method of the laminated body comprises the following steps:

by applying the hot-melt adhesive in such a manner that the hot-melt adhesive has a region overlapping the certain opening, the nonwoven fabric and the sheet are bonded to each other,

the aperture is of an oval shape having a major axis and a minor axis,

13. An apparatus for producing a laminate comprising a sheet and a nonwoven fabric having a plurality of openings, wherein at least a non-melted portion is provided at an edge portion adjacent to any one of the plurality of openings,

the laminate manufacturing apparatus includes:

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

joining means for joining the nonwoven fabric and the sheet to each other with the hot melt adhesive,

The aperture is of an oval shape having a major axis and a minor axis,