TWI825286B - Laminates and absorbent articles - Google Patents

Abstract

[Problem] To provide a laminated body that can ensure strength and suppress hot-melt adhesive from seeping out from openings. [Solution] The laminate (1) includes a nonwoven fabric (10) having a plurality of openings (5), a sheet (20), and an elastic member (20) sandwiched between the nonwoven fabric and the sheet in an extended state. 30), while the non-woven fabric and the sheet are joined to each other through a hot-melt adhesive, the hot-melt adhesive has at least a partially overlapping area with one of the plurality of openings (5a), wherein the non-woven fabric (10), It has a non-melted portion (5ah) in at least a part of the edge portion (5ae) adjacent to an opening (5a), and has a melted portion (4) in a portion other than the edge portion (5ae).

Description

Laminates and absorbent articles

The present invention relates to a laminated body and an absorbent article.

Absorbent articles such as disposable diapers and sanitary napkins use a laminate in which two sheet members (such as nonwoven fabrics) are joined (laminated) in the thickness direction using a hot-melt adhesive or the like. . Moreover, it is also known to provide a plurality of openings in at least one of the two sheet members (for example, see Patent Document 1). In Patent Document 1, as a measure to prevent the hot melt adhesive from escaping from the openings of the sheet member, the hot melt adhesive is applied only to the burrs. [Prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Publication No. 2018-57810

[Problem to be solved by the invention]

However, it is difficult to selectively apply hot-melt adhesive only to the burrs, and the hot-melt adhesive may bleed out from the openings. Therefore, users may worry about a sticky feeling. Furthermore, since a plurality of openings are formed in the sheet member, the strength (rigidity) may be reduced.

The present invention was made in view of the above-mentioned problems, and its object is to provide a laminated body that can ensure strength and suppress the hot-melt adhesive from bleeding out from the openings. [Technical means to solve problems]

The main invention used to achieve the above object is a laminated body comprising: a nonwoven fabric having a plurality of openings, a sheet, and an elastic member sandwiched between the nonwoven fabric and the sheet in an elongated state, and the nonwoven fabric and the sheet. While the aforementioned sheets are joined to each other by a hot-melt adhesive, the aforementioned hot-melt adhesive has an area that at least partially overlaps with one of the aforementioned plurality of openings, wherein the aforementioned non-woven fabric is with the aforementioned one opening. At least part of the adjacent edge portion has a non-melted portion, and a portion other than the edge portion has a melted portion. Other features of the present invention will be apparent from the description of this specification and the attached drawings. [Effects of the invention]

According to the present invention, it is possible to provide a laminated body that can ensure strength and suppress bleeding of the hot-melt adhesive from the openings.

From the descriptions in this manual and the attached drawings, at least the following matters can be understood.

A laminated body comprising: a nonwoven fabric having a plurality of openings, a sheet, and an elastic member sandwiched between the nonwoven fabric and the sheet in an elongated state, and the nonwoven fabric and the sheet are mutually bonded with a hot-melt adhesive. At the same time of joining, the hot-melt adhesive has an area that at least partially overlaps with one of the plurality of openings, wherein the non-woven fabric has a non-melted surface on at least a part of the edge adjacent to the one opening. part, and has a melted part at a location other than the aforementioned edge part.

According to such a laminated body, since at least part of the edge portion of the opening has a non-melted portion, the opening can be easily deformed when the elastic member contracts. This can prevent the hot melt adhesive from seeping out of the openings. In addition, by having a melted portion at a location other than the edge of the opening, the rigidity of the nonwoven fabric can be improved. Therefore, even if a plurality of openings are provided in the nonwoven fabric, the strength can be ensured and the hot melt adhesive can be suppressed from bleeding through the openings.

In such a laminated body, it is preferable that the area of the one opening is larger than the area of the melted portion in the stretched state.

According to such a laminate, since the area of the openings is larger than the area of the melted portion, flexibility can be easily maintained and the hot melt adhesive can be prevented from seeping out from the openings.

In such a laminated body, it is preferable that the pitch of the molten portions arranged in the predetermined direction is smaller than the pitch of the openings arranged in the predetermined direction.

According to such a laminated body, the strength in a predetermined direction can be ensured and it is difficult to break.

In such a laminate, it is desirable that the nonwoven fabric contains a lubricant.

According to such a laminated body, since the fibers easily slide with each other, shrinkage of the openings is not hindered. Thereby, the deformation of the openings caused by the elastic member is promoted, and the hot melt adhesive can be suppressed from seeping out from the openings.

In such a laminated body, it is desirable that the fibers constituting the nonwoven fabric have a circular or elliptical cross section.

According to such a laminated body, since the fibers easily slide with each other, shrinkage of the openings is not hindered. Thereby, the deformation of the openings caused by the elastic member is promoted, and the hot melt adhesive can be suppressed from seeping out from the openings.

In such a laminated body, it is preferable that the planar shape of the openings is circular or elliptical in the stretched state.

According to such a laminated body, the shape of the openings is easier to deform than in the case of rectangular or polygonal shapes. Therefore, bleeding of the hot melt adhesive from the openings can be suppressed.

In such a laminated body, it is preferable that the nonwoven fabric is a spunbond nonwoven fabric.

According to such a laminated body, spunbond nonwoven fabrics are easier to move than other nonwoven fabrics (such as air-through nonwoven fabrics) around the openings, and the openings are easier to close. Therefore, it is highly effective in suppressing the bleeding of hot melt adhesive from the openings.

In such a laminated body, the sheet may have a plurality of openings.

According to such a laminated body, the number of openings is increased, so the air permeability is improved. In addition, the laminated body becomes softer, and the openings are easily closed by the elastic member.

In such a laminated body, it is preferable that at least a part of the one opening of the nonwoven fabric overlaps with a non-opening area in the sheet having no openings.

According to such a laminated body, the air permeability of the portion where the openings overlap is further improved. In addition, by contrasting the overlapped portion with the non-perforated area of the sheet and the transparency of the sheet, the shadow of the opening is emphasized, thereby improving visibility.

In such a laminated body, it is preferable that the edge portion adjacent to the one opening and the non-opening region have non-joining portions that are not joined to each other.

According to such a laminated body, since the edge portion of an opening and the non-opening area overlapping at least a part of the opening are not joined to each other, flexibility can be maintained (the openings are easily deformed) and skin contact can be maintained. Feel good.

In such a laminated body, in the stretched state, the diameter of the opening is larger than the diameter of the opening formed in the sheet, and when viewed from above, the opening formed in the sheet is located at the position of the opening. The inside of the hole is desired.

According to such a laminated body, the air permeability is further improved by overlapping the openings of the nonwoven fabric and the openings of the sheet. In addition, the overlapping openings emphasize shadows and improve visibility.

It can also be understood that an absorbent article has an up-down direction, a left-right direction, and a front-back direction that are orthogonal to each other, and includes an absorbent main body that absorbs liquid, and any one of the above-mentioned laminates.

According to such an absorbent article, the hot-melt adhesive can be prevented from seeping out from the pores of the nonwoven fabric of the absorbent article.

In such an absorbent article, it is preferable that the melted portion is between adjacent openings in the above-mentioned vertical direction.

According to such an absorbent article, there is a melted portion between adjacent openings, thereby ensuring strength in the vertical direction and making it difficult to break.

In such an absorbent article, the nonwoven fabric may be disposed closer to the non-skin side than the sheet.

According to such an absorbent article, openings can be seen from the outside.

In such an absorbent article, a non-perforated film is sandwiched between at least one part of the nonwoven fabric and the sheet, and the nonwoven fabric is bonded to the non-skin side surface of the film using the hot melt adhesive. The elastic member is preferably bonded to the skin-side surface of the film using the hot melt adhesive.

According to such an absorbent article, by providing a non-perforated film between the nonwoven fabric and the sheet, it is possible to suppress the hot melt adhesive from seeping out from the pores of the nonwoven fabric. Especially in places where curved elastic members are arranged, hot-melt adhesive cannot be directly applied to the elastic member. Instead, the hot-melt adhesive for fixing the elastic member to the nonwoven fabric must be applied with a high basis weight. Therefore, the effect is very effective in such places. good.

In such an absorbent article, the elastic member is provided from one end to the other end in the left-right direction of the absorbent article across the absorbent body, and the stretch magnification of the portion of the elastic member overlapping the film is smaller than that of the film. The overlapping portion has a desired elongation magnification.

According to such an absorbent article, since the hot melt adhesive is less likely to bleed out in the portion where the film is provided, there is less need to shrink the openings in order to suppress the bleed out of the hot melt adhesive. Therefore, the stretch ratio of the elastic member may be small in the portion where the film is provided.

In such an absorbent article, it is preferable that the basis weight of the hot-melt adhesive that joins the nonwoven fabric and the film is smaller than the basis weight of the hot-melt adhesive that joins the film and the elastic member.

According to such an absorbent article, it is possible to suppress the hot melt adhesive from seeping out from the openings while reliably fixing the elastic member.

In such an absorbent article, it is desirable to add a pattern to the film.

According to such an absorbent article, by providing a plurality of openings in the nonwoven fabric, the pattern of the film can be easily seen.

In such an absorbent article, a tape member for maintaining the grouped state of the absorbent article when the absorbent article is discarded is joined to the non-skin side of the nonwoven fabric, and the nonwoven fabric is joined to the tape member. It is desirable that at least part of the region has the aforementioned melted portion.

According to such an absorbent article, the strength (rigidity) of the nonwoven fabric is increased due to the melted portion, so when the tape member is peeled off, the nonwoven fabric can be suppressed from being torn.

In such an absorbent article, it is preferable that the bonding area between the belt sheet member and the nonwoven fabric and the bonding area between the nonwoven fabric and the sheet overlap at least partially in the thickness direction.

According to such an absorbent article, only the nonwoven fabric is not pulled when the tape member is peeled off. Therefore, the nonwoven fabric is less likely to be torn and the tape member is easily peeled off.

In such an absorbent article, it is preferable that the bonding area between the nonwoven fabric and the sheet spans the belt sheet member in the left-right direction.

According to such an absorbent article, the bonding area between the nonwoven fabric and the sheet spans the left and right directions of the post-processing belt piece to resist the tensile force of the belt sheet member, thereby preventing the nonwoven fabric from being broken from the opening (around the belt sheet member).

In such an absorbent article, the nonwoven fabric may be disposed closer to the skin than the sheet.

According to such an absorbent article, sweat is more easily absorbed by arranging openings on the skin side.

===Implementation === ＜Basic structure of laminated body 1＞ First, the basic structure of the laminated body 1 of this embodiment is demonstrated. FIG. 1 is a schematic perspective view of the laminated body 1 in an extended state, and FIG. 2 is an exploded view of the laminated body 1 . Moreover, FIG. 3A is an enlarged plan view of the X region of the laminated body 1 in FIG. 1 (extended state), and FIG. 3B is a view of the laminated body 1 in FIG. 3A in a contracted state. Moreover, FIG. 4 is a schematic cross-section of the nonwoven fabric 10.

In addition, the stretched state means that the laminated body 1 is stretched to a wrinkle-free state. Specifically, the size of each member (nonwoven fabric 10, sheet 20) constituting the laminated body 1 is stretched to the size of its individual member. The state until it is consistent with or close to this length. In FIGS. 1 and 2 , the direction along the long side of the sheet-like laminated body 1 is referred to as the long side direction, and the direction along the short side is referred to as the short side direction. In addition, the direction orthogonal to the long side direction and the short side direction (the direction in which each member constituting the laminated body 1 overlaps) is defined as the thickness direction.

As shown in FIG. 1 , the laminated body 1 has a two-layer structure including a nonwoven fabric 10 and a sheet 20 , and an elastic member 30 is arranged between the nonwoven fabric 10 and the sheet 20 .

The nonwoven fabric 10 is provided with a plurality of openings 5 penetrating the front and back at intervals. Examples of the material fibers constituting the nonwoven fabric 10 include polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), and the like. In addition, not only single fibers such as polypropylene and polyethylene, but also composite fibers (Bico) having a core-sheath structure formed of polypropylene and polyethylene can be used. In terms of the form of non-woven fabrics, there are thermal bonded non-woven fabrics, spun-bonded non-woven fabrics, hydro-needle non-woven fabrics, hot-air non-woven fabrics, etc. In addition, in this embodiment, spunbond nonwoven fabric is used for the nonwoven fabric 10 . The reason for this will be described later.

In addition, as a material constituting the sheet 20, for example, in addition to the same nonwoven fabric as described above, a resin film or the like used as a supporting sheet for the nonwoven fabric 10 can be used.

The elastic member 30 is an elastic filament-like member, and is arranged in a plurality in the short side direction between the nonwoven fabric 10 and the sheet 20 and is fixed in an extended state in the long side direction. Examples of the elastic member 30 include filamentous rubber, elastic fibers, and the like. In this embodiment, a hot melt adhesive (HMA) is directly applied around each elastic member 30 , and the nonwoven fabric 10 and the sheet 20 are joined by the hot melt adhesive applied to the elastic members 30 . As for the hot melt adhesive (HMA), for example, EVA type, elastomer type, olefin type, polyester/polyamide type, etc. can be used.

However, it is not limited to this, and other coating methods (such as spiral coating that can be applied in a spiral shape, omega coating that can be applied in a corrugated shape, seam control coating, etc.) can also be used to apply the hot melt adhesive to join the nonwoven fabric 10 and the sheet 20 Yes. That is, the application area of the hot melt adhesive and the position of the elastic member 30 may be different.

Here, when the nonwoven fabric 10 is composed of the above-mentioned thermoplastic resin fibers such as polypropylene and polyethylene, the openings 5 can be formed using, for example, a heated pin member (not shown). At this time, the temperature of the pin member is usually set to be at least the melting point of the fiber or film material. At this time, by setting the temperature of the pin member for making the hole above the melting point of each material, the edge portion adjacent to the hole is melted, cooled and solidified to form the hole. However, although the shape of the opening can be maintained by the above method, there is a concern that the opening portion becomes hard.

On the other hand, regarding the plurality of openings 5 formed in the nonwoven fabric 10 of this embodiment, the temperature of the pin member (not shown) when the openings 5 are formed is above the softening point of the fiber and less than the melting point. . Thereby, the edge part 5e (refer FIG. 3A) adjacent to the opening 5 becomes a non-melted part in which fibers are difficult to melt. In addition, the edge portion 5e is an annular portion having a predetermined width (2 mm in this embodiment) toward the outside in the radial direction from the opening 5. In this edge portion 5e, the fibers present in the portion of the opening 5 are further aggregated and the fiber density becomes higher.

In addition, a plurality of melted portions 4 are formed in the nonwoven fabric 10 . The melted portion 4 is formed during the production of the nonwoven fabric 10 . That is, the nonwoven fabric 10 of this embodiment is a spunbonded nonwoven fabric, in which spun long fibers are irregularly stacked to form a network, and are thermally fused in all directions with an embossed hot roller to form a sheet. . The melted portion 4 is a pattern (embossed) formed by the hot roller, and the thickness of the melted portion 4 becomes thinner. Specifically, after measuring the thickness t2 of the edge portion 5e of the opening 5 and the thickness t1 of the fusion portion 4 shown in FIG. 4, the thickness t2 of the edge portion 5e was 350 μm, and the thickness t1 of the fusion portion 4 was 25 μm. In addition, the thickness is measured by freezing the nonwoven fabric 10 with liquid nitrogen, and then cutting out a predetermined range to prepare a measurement sample. Then, a thickness measuring device (for example, a digital microscope VHX-2000 manufactured by Keynes Corporation) is used to capture an image of the cross section of the measurement sample, and the thickness is measured at a plurality of locations (for example, 10 locations), and the average value is used as the thickness.

In addition, fiber density is calculated by dividing basis weight by thickness. If the basis weight of the nonwoven fabric 10 is 18 g/m ² , the fiber density of the edge portion 5 e of the opening 5 becomes 0.05 g/cm ³ because the thickness t2 is 350 μm. On the other hand, since the thickness t1 is 25 μm, the fiber density of the melted portion 4 is 0.72 g/cm ³ . Therefore, the melted portion 4 has a higher density than the edge portion 5e with a high fiber density.

In this way, in the melting part 4, due to the high fiber density, the fibers are heat-fused to each other, and the strength is higher than in other parts.

In addition, although the planar shape of the melting zone 4 in this embodiment is circular, it is not limited to this, and may have other shapes, such as a rectangle, for example.

Among the plurality of openings 5 shown in FIG. 3A , one opening 5 a has an area overlapping the elastic member 30 (in other words, the hot melt adhesive) (the exposed area of the elastic member 30 in the opening 5 a ). In addition, when the elastic member 30 is not directly coated with hot melt adhesive, an opening 5 a does not need to overlap with the elastic member 30 . At this time, it suffices that the application area of the hot-melt adhesive applied between the nonwoven fabric 10 and the sheet 20 overlaps with at least a part of one opening 5a. In addition, the edge portion 5ae of one opening 5a has a non-melted portion 5ah in which the fiber is not melted (in FIG. 3A, the entire edge portion 5ae is a non-melted portion 5ah). Thereby, an opening 5a can be flexible without becoming hard.

In FIG. 3A , the elastic member 30 is arranged along the longitudinal direction in an extended state. Therefore, as the elastic member 30 contracts, the laminated body 1 contracts in the longitudinal direction as shown in FIG. 3B . At this time, the laminated body 1 of this embodiment has the non-melted portion 5ah that is not melted in at least a part of the edge portion 5ae of the opening 5a, so it is easy to deform (that is, it is easy to close). In this way, one opening 5a can be easily closed, thereby preventing the hot melt adhesive from seeping out from one opening 5a.

Furthermore, by providing the melted portion 4 in the nonwoven fabric 10, the strength can be ensured even if the nonwoven fabric 10 has a plurality of openings 5. In addition, by arranging the melting portion 4 at a location other than the edge portion 5e of the opening 5, closing of the opening 5 is not hindered.

Furthermore, as shown in FIG. 3A , in the extended state, the area of the opening 5 is larger than the area of the fusion zone 4 .

Here, assuming that the area of the melted portion 4 is larger than the area of the one opening 5a, for example, the melted portion 4 and the one opening 5a are arranged in a direction orthogonal to the expansion and contraction direction of the elastic member 30 (here, the short side direction) If time waits, once the hole 5a is opened, it may be difficult to close. That is, there is a concern that the flexibility around one opening 5a cannot be maintained. In this embodiment, in the stretched state, the area of the opening 5 (one opening 5a) is larger than the area of the melting portion 4, so that the flexibility can be maintained and the oozing of the hot melt adhesive can be suppressed. Furthermore, since the area of the melted portion 4 is smaller than the area of the opening 5, even if the melted portion 4 is stacked on the edge portion 5ae of the opening 5a, at least a part of the edge portion 5ae of the opening 5a becomes the non-melted portion 5ah. . Therefore, softness can be maintained.

In addition, as for the measurement method of the area of the opening 5 and the fusion zone 4, for example, the following method can be implemented. That is, the area of the opening 5 and the fusion zone 4 can be obtained by extracting the area of the opening 5 and the fusion zone 4 from an image taken with a microscope (for example, a digital microscope manufactured by Keynes Corporation) and calculating the area of the extracted area. . In this embodiment, since both the opening 5 and the melted portion 4 are circular, only the diameter of the extracted area can be obtained. The larger the diameter, the larger the area.

Furthermore, as shown in FIG. 3A , in the extended state, the openings 5 are arranged at a pitch P1 in the longitudinal direction and the transverse direction, and the melted portions 4 are arranged at a pitch P2 in the longitudinal direction and the transverse direction. Furthermore, the pitch P2 of the melted portion 4 is smaller than the pitch P1 of the openings 5 .

In this way, since the pitch P2 of the melted portion 4 is smaller than the pitch P1 of the openings 5 , the strength in the long-side and short-side directions can be ensured, so that the nonwoven fabric 10 is not easily broken. In addition, in this embodiment, although the openings 5 are arranged at the same pitch (pitch P1) in the long-side direction and the short-side direction, the pitch may be different in the long-side direction and the short-side direction. The same applies to the melting zone 4 . In addition, the melted portion 4 and the opening 5 may be arranged in an oblique direction with respect to the long side direction and the short side direction. Regarding a specific direction, by setting the pitch of the fused portions 4 to be smaller than the pitch of the openings 5, the strength in that direction can be improved.

In addition, it is desirable that the nonwoven fabric 10 contains a lubricant. Examples of lubricants include surfactants and oils. More specifically, oleamide, erucamide, stearamide, etc. can be used, or modified silicone oil containing amino acids can be used. Animal and vegetable oils such as silicone oil, olive oil, etc., mobile paraffin, etc. But it is not limited to this at all. That is, as long as the friction coefficient at the position where the predetermined material is coated on the nonwoven fabric 10 can be lowered than the friction coefficient before coating, the material can obtain the above-mentioned lubricating effect. Thereby, the sliding of the fibers constituting the nonwoven fabric 10 is improved, and shrinkage of the openings 5 is not hindered. Therefore, the hot melt adhesive can be suppressed from bleeding out from the openings 5 .

In addition, it is preferable that the cross section of the fibers constituting the nonwoven fabric 10 is circular or oval. If the cross-section of the fiber is circular or elliptical, the fibers can easily slide with each other, so the shrinkage of the opening 5 will not be hindered. Thereby, the deformation of the opening 5 caused by the elastic member 30 is accelerated, thereby suppressing the hot melt adhesive from seeping out of the opening 5 .

In addition, in the extended state shown in FIG. 3A , although the planar shape of the opening 5 is circular, it may also be elliptical. In this way, it is desirable that the planar shape of the opening 5 is circular or elliptical. Thereby, the opening 5 becomes easier to deform (easy to close) compared with the case where the planar shape is a rectangle or a polygon. Therefore, the hot melt adhesive can be suppressed from bleeding out from the openings 5 .

In addition, compared with other nonwoven fabrics, the spunbond nonwoven fabric used in this embodiment has fibers around the openings that move relatively easily. For example, air-through nonwoven fabrics are heat-fused at many points of contact between fibers, and almost all of them are in a molten state. If the air-through nonwoven fabric is used as the nonwoven fabric 10, the overall rigidity will be high and the openings will not be easily deformed.

In this embodiment, since spunbond nonwoven fabric is used as the nonwoven fabric 10, the fibers around the opening are relatively easy to move, and the opening 5 (an opening 5a) is easily closed. Therefore, it is highly effective in suppressing the bleeding of hot melt adhesive. In addition, by providing a plurality of embossings (melted portions 4) on the spunbonded nonwoven fabric, the strength can be ensured even if the nonwoven fabric 10 has a plurality of openings 5.

<Modification of laminated body 1> FIG. 5 shows a schematic explanatory diagram of a modification of the laminated body 1 (laminated body 1´). In this modification (FIG. 5), a plurality of openings (openings 6) are formed in the sheet 20. The opening 6 is provided through the nonwoven fabric 10 and the sheet 20 . In addition, in the nonwoven fabric 10, since the portion where the openings 5 and 6 overlap becomes the opening portion, the outline of each opening is invisible. However, as shown in Fig. 5 (and Figs. 6 and 7 described later), For convenience, the outline of each opening is left as a solid line. The opening 6 is formed at a position that does not overlap the elastic member 30 . Furthermore, in this modification, the nonwoven fabric 10 and the sheet 20 are joined with a hot melt adhesive directly applied to the elastic member 30 .

The laminated body 1' has a plurality of openings 5 in the nonwoven fabric 10 and a plurality of openings 6 provided in the nonwoven fabric 10 and the sheet 20, thereby increasing the number of openings and making it easier to ensure ventilation. In addition, the flexibility becomes higher, and the openings 5 of the nonwoven fabric 10 can be easily closed.

Figure 6 is an enlarged plan view of the laminated body 1´ in an extended state. FIG. 6 shows a state in which the nonwoven fabric 10 and the sheet 20 are overlapped. In FIG. 6 , one of the plurality of openings 5 in the nonwoven fabric 10 of the laminate 1′ (the opening having an area overlapping the elastic member 30 ) is used as the opening 5 a and is provided on the sheet 20 side. One of the plurality of openings 6 is designated as 6a. In addition, illustration of the melted portion 4 of the nonwoven fabric 10 is omitted here. Taking one opening 5 a of the plurality of openings 5 of the nonwoven fabric 10 as an example, the opening 5 a may overlap with one opening 6 a of the plurality of openings 6 provided on the sheet 20 side. In the laminate 1´, the openings 5 (5a) and the openings 6 (6a) overlap, further improving the air permeability. In addition, since the overlapping portion of the edge of the opening (the portion indicated by K in the figure) is made more clear by the gathered fibers, the outline of the opening 5 (6) becomes clearer, so the visibility is improved.

FIG. 7A is a schematic enlarged view for explaining an example of the openings 5 and 6 of the laminate 1′ in an extended state. In FIG. 7A , a region without openings in the sheet 20 is referred to as a non-opening region 60 (a portion indicated by a downward-left oblique line). As shown in FIG. 7A , at least part of an opening 5 a has an area R (a portion represented by a grid) that overlaps the non-opening area 60 of the sheet 20 . In this way, where the openings overlap each other, the shadows of the openings are emphasized, thereby improving visibility.

In addition, it is preferable that the edge portion 5ae adjacent to one opening 5a and the non-opening area 60 have non-joining portions 70 that are not joined to each other. Since the edge portion 5ae is not joined to the non-perforated area 60 of the sheet 20, the edge portion 5ae does not become hard and the flexibility of the laminated body 1' can be maintained.

FIG. 7B is a schematic enlarged view for explaining an example of the openings 5 and 6 of the laminated body 1′, that is, an example of the relationship between the sizes of the openings 5 and 6 in the extended state. If the diameter of one of the openings 5a(5) in the openings 5 is 5adi, and the diameter of one of the openings 6a in the plurality of openings 6 provided on the sheet 20 side is 6adi, then it is ideal that the diameter 5adi is larger than the diameter 6adi. . The sizes of the apertures 5adi and 6adi in this example are, when viewed from above, if the edge of the lower hole (the edge of the opening 6a in Figure 7B) is visible, the aperture of the upper hole (5a) is larger, and when it is not visible, , the diameter of the upper hole (5a) is small. In addition, when viewed from above, it is ideal that the opening 6a is located inside the opening 5a. Thereby, the air permeability of the laminated body 1' is further improved in the part where the opening 5a of the nonwoven fabric 10 overlaps the opening 6a of the other sheet 20. In addition, due to the overlapping openings 5a and 6a, when viewed from above, a shadow is formed at the overlapping portion of the openings 5a and 6a, thereby improving the visibility of the openings.

＜＜Absorbent article 100 using laminate 1＞＞ As a specific example of how to use the laminated body 1, an example in which the laminated body 1 is used in the waist region of an absorbent article will be described. Here, the absorbent article 100 is a pants-type disposable diaper 100 (hereinafter also referred to as "disposable diaper 100") as an example. Fig. 8 is a schematic perspective view of the disposable diaper 100. FIG. 9 is a schematic plan view of the disposable diaper 100 in an unfolded and extended state as viewed from the non-skin side.

Here, the above-mentioned "expanded state" refers to unbundling both ends of the abdominal waist portion (abdominal waist portion 120 to be described later) in the width direction (left-right direction) of the disposable diaper 100 and the back waist portion ( The two ends of the back waist part 130 (described later) are joined together to separate the abdominal waist part and the back waist part, and at the same time, the disposable diaper 100 is opened in the longitudinal direction, and the disposable diaper 100 is unfolded on a flat surface. . In addition, the "stretched state" of the disposable diaper 100 means that the entire disposable diaper 100 (the entire product) is stretched to a wrinkle-free state. Specifically, each member constituting the disposable diaper 100 (for example, the absorbent main body 110 described below) , the abdominal waist portion 120 , the dorsal waist portion 130 , etc.) are stretched until they are equal to or close to the size of the individual components.

The disposable diaper 100 has an up-down direction, a width direction, and a front-back direction which cross each other in the pant-type state shown in FIG. 8. This disposable diaper 100 has an absorbent main body 110 that is attached to the wearer's crotch area and absorbs liquids such as excretion, an abdominal waist portion 120 that covers the wearer's abdominal area, and an absorbent body 110 that covers the wearer's abdominal area. A so-called three-component disposable diaper having a back waist part 130 on the back part.

In the unfolded state of FIG. 9 , the disposable diaper 100 has a longitudinal direction and a left-right direction that cross each other. One side in the longitudinal direction in this expanded state is called the "abdominal side" or "front side", and the other side in the longitudinal direction is also called the "dorsal side" or "rear side." The longitudinal direction of the unfolded state is the direction along the up-and-down direction of the pant-shaped state. Moreover, as shown in FIG. 8, the thickness direction is the direction in which the materials constituting the disposable diaper 100 are laminated. In the thickness direction, the side that contacts the wearer is the skin side, and the opposite side is the non-skin side.

In the unfolded state of FIG. 9 , the absorbent main body 110 is fixed between the abdominal waist part 120 and the back waist part 130 which are arranged substantially in parallel. When the disposable diaper 100 is worn, the absorbent body 110 is folded in half at the central portion C10 in the longitudinal direction, and the abdominal waist portion 120 and the back waist portion 130 facing each other are folded in the left and right directions. The edge portions 120e and 130e are joined to each other, and the diaper 100 is in a wearing state in which the waist opening BH and the pair of leg openings LH are formed as shown in FIG. 8 .

The absorbent body 110 has an absorbent core 111 that absorbs liquid. The absorbent core 111 is a member formed by laminating liquid-absorbent materials, and can absorb excretions such as urine. As the liquid-absorbent material, for example, liquid-absorbent fibers such as pulp fibers can be used. In addition, the absorbent core 111 may contain, for example, a superabsorbent polymer as the liquid-absorbent granular material, or may contain a liquid-absorbent material other than liquid-absorbent fiber and liquid-absorbent granular material.

The abdominal waist part 120 is a part that covers the wearer's abdominal waist, and includes a nonwoven fabric 121 arranged on the non-skin side in the thickness direction, a sheet 122 arranged on the skin side relative to the nonwoven fabric 121, and A plurality of elastic members 123 are provided between the nonwoven fabric 121 and the sheet 122 .

Similarly, the back waist part 130 is a part covering the waist of the wearer's back, and includes a nonwoven fabric 131 arranged on the non-skin side in the thickness direction, and a nonwoven fabric 131 arranged closer to the wearer's skin than the nonwoven fabric 131 The sheet 132 on the side, and a plurality of elastic members 133 provided between the nonwoven fabric 131 and the sheet 132 . Furthermore, a post-treatment belt piece 135 (corresponding to a belt piece member) is provided on the non-skin side surface of the back waist part 130 .

In this embodiment, the laminated body 1 is used for each of the waist parts (the abdominal waist part 120 and the back waist part 130) of the disposable diaper 100. That is, the nonwoven fabrics 121 and 131 are composed of the nonwoven fabric 10 having a plurality of openings 5 , the sheets 122 and 132 are composed of the sheets 20 , and the plurality of elastic members 123 and 133 are composed of the elastic members 30 .

The nonwoven fabrics 121 and 131 having a plurality of openings 5 are respectively arranged on the non-skin side of the sheets 122 and 132 having no openings. Thereby, the presence of the opening 5 can be seen from the outside. In addition, the non-perforated sheets 122 and 132 are on the skin side, so they feel good against the skin and will not harm the skin.

In the disposable diaper 100, the plurality of elastic members 123 are elastic filament-like members, are arranged in the vertical direction between the nonwoven fabric 121 and the sheet 122, and are fixed in a state of being stretched in the left and right directions. That is, the left-right direction corresponds to the long-side direction of the laminated body 1, and the up-down direction corresponds to the short-side direction of the laminated body 1. In addition, the plurality of elastic members 133 are arranged in an up-down direction between the nonwoven fabric 131 and the sheet 132 and are fixed in a state of being stretched in the left-right direction. Thereby, the abdominal waist part 120 and the back waist part 130 are provided with left-right elasticity.

In addition, a plurality of openings 5 are provided in the nonwoven fabric 121 (10) of the abdominal waist portion 120, and the sheets 122 are joined by a hot melt adhesive directly applied around the plurality of elastic members 123. Similarly, a plurality of openings 5 are provided in the nonwoven fabric 131 ( 10 ) of the back waist portion 130 , and the sheets 132 are joined by a hot melt adhesive directly applied around the plurality of elastic members 133 .

In this manner, by using the laminate 1 for the waist portion of the disposable diaper 100, the plurality of openings 5 can be easily deformed (easily closed), and therefore the hot melt adhesive can be suppressed from seeping out from the openings 5 of the waist portion.

In addition, in the nonwoven fabrics 121 and 131, the pitch (pitch P1) of the openings 5 is smaller in the up and down direction (corresponding to the short side direction in Figure 3) and the left and right direction (corresponding to the long side direction in Figure 3). A plurality of molten portions 4 are provided at intervals (pitch P2). Even if a plurality of openings 5 are provided in the nonwoven fabrics 121 and 131, strength (rigidity) can be ensured by providing a plurality of fused portions 4. In addition, by providing the melting portion 4 at a location other than the edge portion 5e of the opening 5, shrinkage of the opening 5 is not hindered.

In addition, since the pitch P2 at which the melted portions 4 are arranged is smaller than the pitch P1 at which the openings 5 are arranged in the vertical direction, the melting portions 4 are always positioned between the adjacent openings 5 in the vertical direction (refer to the short side direction in FIG. 3 ). .

Assuming that the melted portion 4 does not exist between the adjacent openings 5 in the vertical direction, because the material strength of this portion is weak, when the diaper 100 is pulled up and down (for example, when the diaper 100 is pulled up), there will be a gap between the adjacent openings 5. There is a concern about breakage between the 5 openings.

On the other hand, in this embodiment, the fusion part 4 is always arranged between the adjacent openings 5 in the vertical direction. Thereby, the strength in the vertical direction can be improved, and breakage of the area between the vertically adjacent openings 5 can be suppressed.

The post-processing tape piece 135 is a member used to maintain the paper diaper 100 in a ballized state when the used disposable diaper 100 is discarded. As mentioned above, it is provided on the nonwoven fabric 131 at the center of the back waist portion 130 in the left-right direction. The non-skin side (see Figure 9).

FIG. 10 is a schematic perspective view of the post-processing tape piece 135 in an unfolded state. Moreover, FIG. 11 is a schematic cross-sectional view taken along line A-A in FIG. 9 . In addition, the absorptive body 110 is not shown in FIG. 11 .

The post-processing belt 135 has a belt body part 135a, a support part 135b, and a pinch part 135c.

The belt piece main body 135a is an elongated belt-shaped member. The tape sheet main part 135a provided in the disposable diaper 100 is in a state folded in the longitudinal direction as shown in FIG. 11 . That is, the strip body portion 135a in the folded state is provided with an adhesive layer (not shown) with peelable adhesive strength on at least part of the surfaces facing each other (including the surface facing the support portion 135b). , whereby the belt piece body part 135a is temporarily fixed in the folded state.

The support portion 135b is a portion that supports the belt piece body portion 135a. In this embodiment, it is a portion that is bifurcated (in the front and back direction of the belt piece body portion 135a) at the end of the belt piece body portion 135a. In other words, one end of the strip body part 135a is connected to both ends of the support part 135b. In addition, as shown in FIG. 11 , the surface of the support portion 135b opposite to the belt piece body portion 135a is non-releasably fixed (joined to the non-skin side surface (also known as the non-skin side) of the back waist portion 130) using a hot melt adhesive or the like. That is, the non-skin side surface of the non-woven fabric 131 having the openings 5). Thereby, a bonding area 136 is formed between the post-treatment belt piece 135 (support portion 135b) and the non-woven fabric 131.

The gripping portion 135c is a portion that is held with fingers when tearing off the post-processing tape 135 (the tape main portion 135a), and is provided at the end of the tape main portion 135a opposite to the support portion 135b.

Examples of the material of each member of the post-processing belt piece 135 include resin materials such as polyethylene and polypropylene, but the material is not limited thereto. For example, pulp materials such as paper may be used.

12A to 12C are schematic views showing the state when the post-processing tape piece 135 is torn off.

When discarding the used disposable diaper 1, hold the holding portion 135c and pull it away from the support portion 135b. In this case, as shown in FIGS. 12A to 12C , the folded tape piece main body 135 a is gradually peeled off.

Then, as shown in FIG. 12C , after the tape main part 135 a is completely peeled off, the tape main part 135 a can be wound up against the disposable diaper 100 that is rolled up in the longitudinal direction with the absorbent main body 110 inside. The disposable diaper 100 is maintained in the balled state.

Here, it is desirable that the nonwoven fabric 131 (10) has the fusion portion 4 in at least a part of the bonding area 136 (the bonding area between the post-processing tape piece 135 and the nonwoven fabric 131). Joining the melted part 4 and the joining area 136 increases the strength of the nonwoven fabric 131 and prevents the nonwoven fabric 131 from being broken when the post-processing tape piece 135 is peeled off.

In addition, in FIG. 11 , the nonwoven fabric 131 and the sheet 132 are joined using a hot melt adhesive (not shown) directly applied to the elastic member 133 . Furthermore, in the thickness direction, the joint region 136 of the support portion 135b (post-processing belt piece 135) and the nonwoven fabric 131 partially overlaps with the joint region of the nonwoven fabric 131 and the sheet 132 (here, the elastic member 133). In this way, it is desirable that the bonding region 136 and the bonding region of the nonwoven fabric 131 and the sheet 132 overlap at least partially in the thickness direction. Therefore, when the tape piece 135 is peeled off and processed, the nonwoven fabric 131 is tightly pulled, so the nonwoven fabric 131 is not easily broken. Furthermore, the post-processing tape piece 135 can be easily peeled off.

Furthermore, as mentioned above, the nonwoven fabric 131 and the sheet 132 are joined using the hot melt adhesive applied around the elastic member 133. Since the elastic member 133 is arranged in the left-right direction, the joining area of the nonwoven fabric 131 and the sheet 132 is (In other words, the elastic member 133 ) spans the rear treatment belt piece 135 in the left-right direction (see FIG. 9 ). The nonwoven fabric 131 (around the post-processing tape 135) is pulled toward the post-processing tape 135 side by the tensile force of the post-processing tape 135, and may be broken starting from the opening 5. Here, the joint area of the non-woven fabric 131 and the sheet 132 spans the left and right directions of the post-processing belt piece 135 to resist the tensile force of the post-processing belt piece 135, thereby preventing the non-woven fabric 131 from being broken through the opening 5 (around the post-processing belt piece 135). falling situation.

Furthermore, in the post-processing tape 135 of this embodiment, the support portion 135b is bifurcated at the ends of the tape body 135a. Therefore, when the tape body 135a is pulled, the support portion 135b is bifurcated at both ends of the support portion 135b. Between the support portion 135b and the strip body portion 135a, the tensile stress becomes maximum. Thereby, even if the tape piece main part 135a is pulled, peeling from the edge part of the support part 135b will hardly occur.

As described above, in the disposable diaper 100 of this embodiment, by using the laminate 1 in the waist part (the abdominal waist part 120 and the back waist part 130), the openings 5 of the nonwoven fabrics 121 and 131 can be easily closed. The hot melt adhesive is suppressed from seeping out from the opening 5 in the waist area.

In addition, in the above embodiment, the nonwoven fabrics 121 and 131 having a plurality of openings are respectively arranged on the non-skin side of the thinner sheets 122 and 132. Therefore, the present invention is not limited to this, and the nonwoven fabrics 121 and 131 may also be arranged on the thinner sheets 122 and 132. 122 and 132 are closer to the skin side. At this time, since the openings 5 are present on the skin side, sweat can be absorbed more easily.

Moreover, in this embodiment, although the laminated body 1 is used for the waist part (the abdominal waist part 120 and the back waist part 130) of the disposable diaper 100, you may use the laminated body 1 ' of a modification (refer FIG. 5). . This can further improve breathability. In addition, the flexibility can be improved, making the opening 5 easier to close.

<<Absorbent article 200 using laminate 1>>

Next, another example of how to use the laminated body 1 will be described. Here, the absorbent article 200 is exemplified by a pants-type disposable diaper 200 (hereinafter also referred to as "disposable diaper 200"). FIG. 13 is a schematic plan view of the disposable diaper 200 in an unfolded and extended state viewed from the skin side. Moreover, FIG. 14 is a schematic cross-sectional view taken along line B-B in FIG. 13 . In addition, FIG. 15 is an explanatory diagram of the application area of the hot melt adhesive.

Like the disposable diaper 100, the disposable diaper 200 has an up-down direction, a width direction, and a front-rear direction that intersect each other in the pant-shaped state (not shown), and has a longitudinal direction, a left-right direction, and a thickness that intersect each other in the unfolded state of Fig. 13 direction. The definition of each direction is the same as that of the disposable diaper 100.

The disposable diaper 200 has an absorbent main body 210, a top sheet 220, a cover sheet 230, a film 240, and leg elastic members 250 (corresponding to elastic members). In addition, in order to simplify the description here, illustration of elastic members of the waistline and the like are omitted.

From the unfolded state in Fig. 13, while the central portion in the longitudinal direction of the absorbent main body 210 is folded in half, and in the folded state, if the waist portions facing each other are joined using joining means such as welding and adhesion, the waist portions facing each other will be folded in half. The isowaist portions are connected to each other in an annular shape to form a pant-shaped state (not shown).

The absorbent main body (absorbent core) 210 has a function of absorbing excretions such as urine, and is formed into a substantially rectangular shape in plan view as shown in FIG. 13 , with its longitudinal direction positioned at the center of the transverse direction along the longitudinal sides of the disposable diaper 1 . The absorbent main body 210 is formed by forming liquid-absorbent fibers such as pulp fibers into a predetermined shape, and mixing a super absorbent polymer (so-called SAP) or the like inside.

The top sheet 220 is a liquid-permeable sheet member that is disposed on the skin side in the thickness direction of the absorbent main body 210 and comes into contact with the wearer's skin when the disposable diaper 200 is worn. The top sheet 220 of this embodiment is a non-perforated sheet composed of the sheets 20 of the laminate 1 .

The cover sheet 230 is most disposed on the non-skin side of the disposable diaper 200 . The cover sheet 230 of this embodiment is composed of the nonwoven fabric 10 of the laminate 1 and has a plurality of openings 5 (see FIG. 15 ) and a plurality of fused portions (not shown here).

The film 240 is a liquid-impermeable, non-porous sheet member disposed on the non-skin side of the absorbent main body 210, and is formed of, for example, a resin film. By providing the film 240, moisture such as urine absorbed by the absorbent body 210 can be suppressed from moving (penetrating) to the wearer's clothing side. In addition, by providing the film 240, the hot melt adhesive can be suppressed from seeping out (to be described later). The film 240 is provided in a portion between the top sheet 220 and the cover sheet 230 (a wider range than the absorbent body 210). Furthermore, a pattern (not shown) is applied to the non-skin side surface of the film 240 . The pattern is not particularly limited to patterns, pictures, symbols, characters, etc. In the disposable diaper 200 of this embodiment, since the cover sheet 230 has a plurality of openings 5, the pattern of the film 240 can be easily seen.

The leg elastic members 250 are provided from one end to the other end in the left-right direction of the disposable diaper 1 across the absorbent main body 210 . Moreover, as shown in FIG. 13, in the disposable diaper 200, the leg elastic member 250 is curved and arrange|positioned.

However, when the leg elastic members 250 are bent and arranged in this way, the hot melt adhesive cannot be directly applied around the leg elastic members 250 . Therefore, the hot melt adhesive for fixing the leg elastic members 250 is applied to the nonwoven fabric (here, the cover sheet 230). At this time, in order to firmly fix the curved leg elastic members 250, it is necessary to increase the amount of hot melt adhesive applied. However, if the coating amount of the hot melt adhesive is increased, there is a greater concern that the hot melt adhesive may ooze out of the openings 5 of the cover sheet 230 . In particular, in the crotch area, since the expansion ratio of the leg elastic member 250 is small as will be described later, the opening 5 is difficult to close, and there is a greater concern that the hot melt adhesive may ooze out.

Here, in this embodiment, the non-perforated film 240 is provided in a portion between the top sheet 220 and the cover sheet 230 (specifically, the portion overlapping the absorbent main body 210). Furthermore, the non-skin-side surfaces of the covering sheet 230 and the film 240 are bonded with a hot-melt adhesive (Ha), and the leg elastic members 250 and the skin-side surfaces of the film 240 are fixed (joined) with a hot-melt adhesive (Hb). noodle. The application conditions of the hot melt adhesive Ha and the hot melt adhesive Hb will be described later.

The leg elastic members 250 are arranged in a state of being stretched at different stretching magnifications from one end to the other end in the left-right direction. More specifically, in the leg circumference elastic member 250 , the elongation magnification of the portion overlapping the film 240 is smaller than the elongation magnification of the portion overlapping the film 240 . In addition, the "elongation ratio" of the elastic member is an index indicating how many times it is extended (stretched) relative to the natural length (length in the unloaded state) during manufacturing. For example, assuming that the expansion ratio when the elastic member is installed in a natural length is 1 time, the expansion ratio when the elastic member is stretched to a length that is twice the natural length is 2 times. Therefore, the greater the elongation ratio, the greater the shrinkage force.

In the leg circumference elastic member 250, the portion overlapping the film 240 has a portion overlapping the absorbent main body 210 in the center portion in the left-right direction. Accordingly, by reducing the elongation ratio of this portion, excessive shrinkage of the absorbent main body 210 in the left-right direction can be suppressed. In addition, since the hot melt adhesive (here, the hot melt adhesive Hb) is less likely to seep out at the portion overlapping the film 240, there is less need to shrink the opening 5 in order to suppress the seepage of the hot melt adhesive. Therefore, the expansion ratio of the leg elastic member 250 may be small. In addition, in the portion overlapping the film 240, the elongation magnification may be different depending on the position in the left-right direction. For example, the elongation magnification in the left-right central portion may be smaller than the elongation magnification in both left-right end portions. Thereby, a stress gradient is generated, and shrinkage of the absorbent body 210 can be suppressed without impairing the fit.

In addition, in the leg circumference elastic member 250, the portion overlapping the film 240 is arranged so that the elongation magnification becomes large. By increasing the elongation ratio of this part and enhancing the contraction force, the fit of the leg circumference can be improved. In addition, the opening 5 of the cover sheet 230 can be easily closed.

In this embodiment, the hot melt adhesive Ha is applied between the cover sheet 230 and the film 240 (that is, the portion where the film 240 is arranged). The hot-melt adhesive Hb is applied to the placement of the leg elastic members 250 (the area indicated by hatching in the figure) after placing the film 240 on the cover sheet 230 as shown in FIG. 15 . Examples of the coating form include well-known coating methods such as spiral coating that can be applied in a spiral shape, omega coating that can be applied in a corrugated shape, and seam control coating.

In addition, the basis weight (coating amount per unit area) of the hot-melt adhesive Ha is set smaller than the basis weight of the hot-melt adhesive Hb. Specifically, in this embodiment, the basis weight of the hot-melt adhesive Ha is 0.5 to 2 g/m ² and the basis weight of the hot-melt adhesive Hb is 4 to 10 g/m ² .

In this way, by reducing the basis weight of the hot-melt adhesive Ha that joins the cover sheet 230 and the film 240, it is possible to suppress the hot-melt adhesive from exuding from the openings 5 of the cover sheet 230 (nonwoven fabric 10). In particular, in the portion where the leg elastic members 250 and the absorbent main body 210 overlap in the thickness direction, the expansion ratio of the leg elastic members 250 is small. Furthermore, since they overlap the absorbent main body 210, the covering sheet 230 does not easily shrink (open holes). 5 is not easy to close). Therefore, by reducing the basis weight of the hot melt adhesive Ha, bleeding from the opening 5 in this part can be suppressed.

On the other hand, by increasing the basis weight of the hot melt adhesive Hb, the leg elastic member 250 can be reliably fixed to the cover sheet 230 and the film 240 . In addition, in the area where the film 240 is arranged, even if the basis of the hot melt adhesive Hb is large, since the film 240 is located on the non-skin side, there is no bleeding of the hot melt adhesive Hb. In addition, in the area where the film 240 is arranged, the expansion ratio of the leg elastic member 250 is large, and the covering sheet 230 is easily contracted (the opening 5 is easily closed). Therefore, bleeding of the hot melt adhesive Hb can be suppressed.

===Other implementation forms===

The embodiments of the present invention have been described above. However, the above-mentioned embodiments are intended to facilitate understanding of the present invention and are not intended to limit the scope of the present invention. Furthermore, as long as the present invention does not deviate from its purpose, it can be It is needless to say that the present invention also includes modifications and improvements and equivalents thereof.

1: Laminated body

1 ' : laminated body

4: Melting section

5: Opening

5e: edge part

5a: opening

5ae: margin

5ah: non-melting part

6,6a: opening

10:Nonwoven fabric

20: thin slices

30: Elastic component

60: Non-opening area

100: Diapers (absorbent articles)

110:Absorbent body

120: Abdominal waistline

120e: Left and right side edges

121:Nonwoven fabric

122:Thin slices

123: Elastic component

130: Back waist part

130e: Left and right side edges

131:Nonwoven fabric

132:Thin slices

133: Elastic component

135: Post-processing strips (sheet components)

135a: Strip body part

135b: Support part

135c:Pinch part

200: Disposable diapers (absorbent articles)

210:Absorbent body

220: Top flakes (flakes)

230: Covering sheet (non-woven fabric)

240:Thin film

250: Leg circumference elastic member (elastic member)

P1: spacing

P2: spacing

[Fig. 1] is a schematic perspective view of the laminated body 1 in an extended state. [Fig. 2] is an exploded view of the laminated body 1. [Fig. 3] Fig. 3A is an enlarged plan view of the X region of the laminated body 1 in Fig. 1. FIG. 3B shows the laminated body 1 in FIG. 3A in a contracted state. [Fig. 4] is a schematic cross-section of the nonwoven fabric 10. [Fig. 5] An explanatory diagram showing a modification of the laminated body 1 (laminated body 1´). [Fig. 6] is an enlarged plan view of the laminated body 1´ in an extended state. [Fig. 7] Fig. 7A is a schematic enlarged view for explaining an example of the openings 5 and 6 of the laminate 1' in an extended state. FIG. 7B is a schematic enlarged view for explaining an example of the openings 5 and 6 of the laminated body 1'. [Fig. 8] is a schematic perspective view of the disposable diaper 100. [Fig. 9] It is a schematic plan view of the disposable diaper 100 in an unfolded and extended state as viewed from the non-skin side. [Fig. 10] is a schematic perspective view of the post-processing tape piece 135 in an unfolded state. [Fig. 11] is a schematic cross-sectional view taken along line A-A in Fig. 9. [Fig. [Fig. 12] Fig. 12A to Fig. 12C are schematic diagrams showing the state when the post-processing tape piece 135 is torn off. [Fig. 13] is a schematic plan view of the disposable diaper 200 in an unfolded and extended state viewed from the skin side. [Fig. 14] is a schematic cross-sectional view taken along line B-B in Fig. 13. [Fig. [Fig. 15] It is an explanatory diagram of the application area of the hot melt adhesive.

1: Laminated body

4: Melting section

5: Opening

5a: opening

5ae: margin

5ah: non-melting part

5e: edge part

30: Elastic component

P1: spacing

P2: spacing

Claims (22)

A laminated body comprising: a nonwoven fabric with a plurality of openings; a sheet; and an elastic member sandwiched between the nonwoven fabric and the sheet in an elongated state, and the nonwoven fabric and the sheet are mutually bonded with a hot-melt adhesive. At the same time of joining, the aforementioned hot-melt adhesive has at least a partially overlapping area with one of the aforementioned plurality of openings. The laminated body is characterized in that the aforementioned non-woven fabric is formed on an edge adjacent to the aforementioned one opening. At least part of the portion has a non-melted portion, and a portion other than the edge portion has a fused portion. The laminated body according to claim 1, wherein in the stretched state, the area of the one opening is larger than the area of the melted portion. The laminated body according to Claim 1 or 2, wherein the pitch of the molten portions arranged in the predetermined direction is smaller than the pitch of the openings arranged in the predetermined direction. The laminated body according to claim 1, wherein the nonwoven fabric contains a lubricant. The laminated body according to claim 1, wherein the fibers constituting the nonwoven fabric have a circular or oval cross-section. The laminated body according to claim 1, wherein in the stretched state, the planar shape of the openings is circular or elliptical. The laminated body according to claim 1, wherein the nonwoven fabric is a spunbonded nonwoven fabric. The laminate according to claim 1, wherein the sheet has a plurality of openings. The laminated body according to claim 8, wherein at least a part of the one opening of the nonwoven fabric overlaps with a non-opening area of the sheet having no openings. The laminated body according to claim 9, wherein the edge portion adjacent to the one opening and the non-opening area have non-joining portions that are not joined to each other. The laminated body according to any one of claims 8 to 10, wherein, in an extended state, the diameter of the opening is larger than the diameter of the opening formed in the sheet, and when viewed from above, it is An opening formed in the aforementioned sheet is located inside the aforementioned opening. An absorbent article having mutually orthogonal up and down directions, left and right directions, and front and rear directions, and is provided with: an absorbent main body that absorbs liquid; and a laminated body of any one of claims 1 to 10. The absorbent article as described in claim 12, wherein, In the aforementioned up-and-down direction, the melting site is between adjacent openings. The absorbent article according to claim 11, wherein the nonwoven fabric is arranged on the non-skin side of the sheet. The absorbent article according to any one of claims 12 to 14, wherein a non-perforated film is sandwiched at least partially between the non-woven fabric and the sheet, and the non-woven fabric is made of the hot-melt adhesive. The elastic member is a surface bonded to the non-skin side of the film and is bonded to the skin side of the film using the hot melt adhesive. The absorbent article according to claim 15, wherein the elastic member is provided across the absorbent body from one end to the other end in the left-right direction of the absorbent article, and the stretch of the portion of the elastic member overlapping the film is The magnification is smaller than the elongation magnification of the portion overlapping the film. The absorbent article according to claim 15, wherein the basis weight of the hot melt adhesive joining the nonwoven fabric and the film is smaller than the basis weight of the hot melt adhesive joining the film and the elastic member. The absorbent article according to claim 15, wherein the film is provided with a pattern. The absorbent article according to claim 11, wherein the disposable absorbent article is bonded to the non-skin side of the nonwoven fabric. In this case, the nonwoven fabric is a tape member for retaining the absorbent article in a grouped state, and the nonwoven fabric has the fusion portion in at least a part of the joint area with the tape member. The absorbent article according to Claim 19, wherein at least a part of the bonding area between the belt sheet member and the nonwoven fabric and the bonding area between the nonwoven fabric and the sheet overlap in the thickness direction. The absorbent article according to Claim 20, wherein the bonding area between the nonwoven fabric and the sheet spans the belt sheet member in the left-right direction. The absorbent article according to claim 11, wherein the nonwoven fabric is disposed closer to the skin than the sheet.

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