KR20180022839A - Absorbent article - Google Patents

Abstract

The present invention relates to an absorbent article comprising a longitudinal direction, a transverse direction and a longitudinal direction, the absorbent article comprising: an absorbent body along the longitudinal direction; And a sheet member including a belt portion along the lateral direction and a pair of leg gathers along the longitudinal direction, wherein the waist opening and the pair of leg openings are formed, and the first and second joint portions are formed in the forward and backward directions Wherein the first joint portion and the second joint portion are each inclined in the transverse direction outward from the waist opening side toward the respective leg opening portions in the longitudinal direction, Wherein the body and each of the sheet members are joined at the first joint and the second joint, respectively, and in a state in which the belt portion is stretched in the transverse direction, And a region located on the other side than the first region.

Description

Absorbent article

The present invention relates to an absorbent article.

As a conventional pants-type disposable diaper, Patent Document 1 discloses a diaper comprising an absorbent main body formed over the front opening, the crotch portion and the dorsal opening, and a pair of belt portions connected to the absorbent main body at the abutment portion.

Such pants-type disposable diapers are required to be seen as underwear.

[Patent Document 1] Japanese Unexamined Patent Application Laid-Open (Translation of PCT Application) No. 8-507699

However, in this disposable diaper, a pair of joint portions are formed at the conspicuous portion of the entire back side and the back side of the back side, thereby increasing the number of the fastening portions as compared with a conventional diaper in which joint portions are formed at two places on both sides. These joints have increased rigidity due to joints, give a wearer a sense of incongruity, and have a problem that the shape of the joint protruding through the garment worn on the diaper can be seen.

The present invention has been made in view of the above situation, and its object is to provide an absorbent article in which the joint is less noticeable.

The main aspect of the present invention for achieving the above-

An absorbent article comprising a longitudinal direction, a transverse direction and a longitudinal direction, the absorbent article comprising:

An absorbent body along said longitudinal direction; And

A sheet member including a belt portion along the lateral direction and a pair of leg gathers along the longitudinal direction;

/ RTI >

A waist opening and a pair of leg openings are formed,

Wherein the first joint portion and the second joint portion are provided on one side and the other side in the front and rear direction, respectively, and the first joint portion and the second joint portion extend from the waist opening side toward the respective leg openings in the longitudinal direction, Wherein at least the absorbent main body and each of the sheet members are bonded to each other at the first joint and the second joint,

In a state in which the belt portion is stretched in the transverse direction,

And each of the first joints is an absorbent article including a region where each of the sheet members is located on the other side than the absorbent main body.

Other features of the present invention will become apparent from the following description with reference to the accompanying drawings.

According to the present invention, in the first joint portion, the sheet member includes a region located on the other side of the absorbent main body, thereby providing an absorbent article in which the joint portion is less conspicuous.

1 is a schematic perspective view showing the appearance of the diaper 1. Fig.
2A is a plan view showing the diaper 1 in a state of being stretched in the longitudinal direction. FIG. 2B is a schematic cross-sectional view taken along line AA of FIG. 2A.
3A is a flat developed view showing a state in which the diaper 1 in a stretched state along the longitudinal direction is developed in the middle of the manufacturing process. FIG. 3B is a schematic cross-sectional view taken along line BB of FIG. 3A.
Fig. 4 is a view for explaining an example of the manufacturing process of the diaper 1. Fig.
Fig. 5 is a view for explaining a portion b in Fig. 2. Fig.
Fig. 6 is a view for explaining a portion a in Fig. 1. Fig.
7 is a view for explaining the first bonding portion WL1 of the diaper 1 in a state in which the belt portion 30 is stretched in the transverse direction.
8A is a schematic cross-sectional view taken along the line CC in Fig. 8B is a schematic cross-sectional view taken along the line DD of Fig. 8C is a schematic cross-sectional view taken along the line EE of Fig. 8D is a schematic cross-sectional view taken along the FF line of Fig.

At least the following will become apparent from the description of the present specification and the accompanying drawings.

An absorbent article comprising longitudinal, transverse, and longitudinal directions, the absorbent article comprising: an absorbent body along the longitudinal direction; And a sheet member including a belt portion along the lateral direction and a pair of leg gathers along the longitudinal direction, wherein the waist opening and the pair of leg openings are formed, and the first and second joint portions are formed in the forward and backward directions Wherein the first joint portion and the second joint portion are each inclined in the transverse direction outward from the waist opening side toward the respective leg opening portions in the longitudinal direction, Wherein the body and each of the sheet members are joined at the first joint and the second joint, respectively, and in a state in which the belt portion is stretched in the transverse direction, And a region located on the other side than the region on the other side.

According to this absorbent article, each of the first joints includes a region where each of the sheet members is located on the other side of the absorbent main body, so that the joint can provide an absorptive article that is less conspicuous.

In this absorbent article, it is preferable that each of the second joining portions includes a region where each of the sheet members is located on one side of the absorbent main body.

According to this absorbent article, each of the second joints includes a region in which each of the sheet members is positioned on one side of the absorbent main body, thereby providing an absorbent article with less conspicuous joints on the one side as well as on the other side .

In this absorbent article, the absorbent body and the belt portion are respectively joined at the first joint portion and the second joint portion, and the absorbent main body does not include the elastic member along the lateral direction, and the belt portion includes the elastic member along the lateral direction desirable.

According to this absorbent article, the absorbent body and the belt member are respectively bonded at the first joint and the second joint, and the absorbent main body does not include the elastic member along the lateral direction, and the belt portion includes the elastic member. As a result, a pulling force is applied to the first joint portion and the second joint portion along the lateral direction (the belt portion side), so that the first joint portion and the second joint portion can be made less conspicuous.

In this absorbent article, it is preferable that the belt portion and the gathered portion of the leg are joined at the first joint portion and the second joint portion, respectively, and the leg gathers include elastic members along the longitudinal direction.

According to this absorbent article, the belt portion and the leg gathers are respectively joined at the first joint portion and the second joint portion, and the leg gathers are also provided with elastic members along the longitudinal direction. Thus, by providing elastic members on both the belt portion and the leg gathers, the rising angle of the first joint portion and the second joint portion can be changed.

In this absorbent article, in each of the first joining portions, an angle formed by each of the first joining portions and each of the sheet members adjacent to the first joining portions is 45 deg. In an area where each of the sheet members is positioned on the other side of the absorbent main body And the sheet member adjacent to each of the second joining portion and the second joining portion forms an angle of 45 deg. In the region where each of the sheet members is located on one side than the absorbent main body in each of the second joining portions, ≪ / RTI > is preferably provided.

According to this absorbent article, the angle formed by each first joint and each sheet member, and the angle formed by each second joint and each sheet member are set to less than 45 degrees, respectively, 1 joint and the second joint can be made less noticeable.

In this absorbent article, an angle formed by each of the first joint portions and the belt portions adjacent to the first joint portions, respectively, in the portion located between each of the belt portions and each of the leg gathers in each of the first joint portions Is formed by each of the second joining portions and the belt portions adjacent to the second joining portions in a portion located between each of the belt portions and each of the leg gathers in each of the second joining portions It is preferable that an area where the angle is 45 DEG or more is provided.

According to this absorbent article, at each of the first joint portion and the second joint portion, in the portion located between the belt portion and the leg gathers, each angle formed by each of the first and second joint portions and the belt portion is 45 degrees An area set above is provided. As a result, the wearer can easily recognize the boundary between the belt portion and the leg gathers, so that the boundary can be used as a supporting portion for lifting the absorbent article when the diaper is worn. Further, the first joint portion and the second joint portion, to which the belt portion and the leg gathers are joined, can be visually recognized, so that anxiety such as peeling of the joint portion can be reduced.

In this absorbent article, the first overlapping region and the second overlapping region are provided on one side and the other side in the front-rear direction, respectively, and the first overlapping region and the second overlapping region are respectively provided, At least the absorbent main body and the sheet member are overlapped in the first overlapping area and the second overlapping area, respectively, and in each of the first overlapping areas, at least the absorbent main body and the sheet member Wherein at least the absorbent main body and the sheet member are bonded to each other at each of the second joining portions in each of the first overlapping regions and the tip of each of the first joining portions is joined to the tip of each of the first overlapping regions, As shown in Fig.

According to such an absorbent article, since the tip of each first joint portion and the tip of each first overlap region are formed at the same position, the respective first joint portions can be made smaller, and the same impression of the inside of the absorbent article is damaged .

In this embodiment

A pants-type disposable diaper 1 (hereinafter also referred to as "diaper 1") as an example of the absorbent article according to the first embodiment will be described.

Fig. 1 is a schematic perspective view showing the appearance of the diaper 1. Fig. The diaper 1 includes an absorbent main body 10, a leg gathers 20 and a belt portion 30 and has a pants shape as shown in Fig. 1 when worn. This diaper 1 includes "longitudinal direction "," lateral direction "and" back and forth direction "which are orthogonal to each other in the pants- A waist opening HB is formed on the upper side in the longitudinal direction of the diaper 1 and a pair of leg openings HL are formed on both sides in the transverse direction. The front side in the front-rear direction of the diaper 1 covers the back of the wearer when the diaper 1 is worn, and the back side of the diaper 1 covers the back side of the wearer.

2A is a plan view showing the diaper 1 in a state in which it is stretched along the longitudinal direction of the absorbent main body 10. Fig. 2B is a schematic cross-sectional view taken along the line A-A of FIG. 2A. 3A is a flat developed view showing a state in which the diaper 1 stretched along the longitudinal direction of the absorbent main body 10 in the middle of the manufacturing process is developed. FIG. 3B is a schematic cross-sectional view taken along the line B-B of FIG. 3A. On the other hand, the X-X line in Figs. 1 and 2 is the center line in the lateral direction,

The diaper 1 is in a planar state as shown in Fig. 2A at the final stage of the manufacturing process. The manufacturing process of the diaper 1 will be described later with reference to Fig. The diaper 1 in a flat state includes "longitudinal direction", "lateral direction" and "thickness direction" as three directions perpendicular to each other. The longitudinal direction of the diaper 1 in a flat state is a direction along the longitudinal direction of the absorbent main body 10. [ This longitudinal direction corresponds to the longitudinal direction of the diaper 1 in the pants-like state as shown in Fig. However, since the longitudinal direction in the pants-like state is somewhat different from the longitudinal direction in the technically planar state, it is possible to use a pawl-like shape, such as "longitudinal direction in pants- Handle both directions separately. 2A, a state in which the diaper 1 is stretched along the longitudinal direction (that is, a flat state) refers to a state in which the elastic members 23 Refers to a state in which the diaper 1 is stretched to such an extent that wrinkles and gathers are not substantially visible in the portion where the elastic member is disposed when the diaper 1 is stretched in the longitudinal direction against the contracting force by the elastic member. The shape of the diaper 1 when stretched in the longitudinal direction is the same as the shape of the diaper 1 which is stretched flat when the shrinking force by various elastic members such as the elastic rubber 23 is not developed. The state in which the diaper 1 is stretched in the longitudinal direction is a state in which only the absorbent main body 10 is in a flat state, It can also be said that the diaper 1 is stretched in the longitudinal direction against the contracting force due to the member 33. [

In the following description, when the absorbent main body 10 is stretched in the longitudinal direction, the side contacting the back side of the wearer is referred to as the front side (back side) in the longitudinal direction and the side contacting the back side of the wearer is referred to as the back side Quot; The lateral direction of the diaper 1 in a flat state is the same as the lateral direction and the thickness direction of the diaper 1 in the pants shape of Fig. The direction in which the diaper 1 is in a flat state is a direction orthogonal to the longitudinal direction and the transverse direction. The side of the diaper 1 in contact with the wearer's skin is referred to as "skin side"

As shown in Figs. 2A and 2B, in the diaper 1 in a flat state, the absorbent main body 10 is arranged along the longitudinal direction, and on both lateral sides of the absorbent main body 10, (Not shown). A pair of belt portions 30 are arranged so as to overlap with a part of the absorbent main body 10 and the leg opening 20 and the skin side in the thickness direction. As shown in Fig. 3A, each of the leg gathers 20 and the belt portions 30 of the diaper 1 is formed by a side sheet 40, which is a sheet member. The folding line FL extending in the longitudinal direction of the sheet member 40 is folded inward in the transverse direction to form the leg gathers 20 and the belt portions 30. [

Each of the leg gathers 20 is provided with a leg gath cut section 25 formed by cutting a part of the leg gathers 20 at the transversely outer end 20eo (folding line FL). Similarly, each of the belt portions 30 is provided with a belt cut portion 35 formed by cutting a part of the belt portion 30 at the transversely outer end 30eo (folding line FL). Each leg opening portion HL is formed by the leg cut-away portion 25 and the belt cut-away portion 35.

The belt portion 30 is fixed to the absorbent main body 10 by a pair of first bonding portions WL1 inclined from the longitudinal front end portion 10f of the absorbent main body 10 toward each leg opening portion HL And the top sheet 13 disposed on the skin side of the absorbent main body 10) and the leg gathers 20, respectively. Similarly, the belt portion 30 is formed by a pair of second joints WL2 inclined from the longitudinal rear end 10er of the absorbent main body 10 toward the respective leg openings HL, And the leg gathers 20, respectively. The first joint and the second joint will be described later in detail.

The absorbent main body 10 is arranged at a central position in the longitudinal direction (in the longitudinal direction) while opening the transversely opposite side ends 30ei and 30ei of the pair of belt portions 30 and 30 of the diaper 1 in this planar state, CL, the diaper 1 can be worn as the pull-on diaper 1. At this time, the waist opening HB is formed by the longitudinally front side end portion 10ef and the rear side end portion 10er of the absorbent main body 10 and the inner side end portion 30ei of the pair of belt portions 30 ).

As shown in Fig. 2A, the absorbent main body 10 is formed such that a substantially rectangular member (see Fig. 3A) extending in the longitudinal direction is cut along the first abutment portion WL1 and the second abutment portion WL2, And the end portions of the members are formed in such a manner as to be substantially V-shaped when viewed from the plane. The absorbent main body 10 includes an absorbent body 11, a top sheet 13 (corresponding to the skin side sheet) provided to cover the absorbent body 11 from the skin side, and a back sheet 13 (Corresponding to the non-skin side sheet). Each of these members 13, 11, 15 is bonded to a member adjacent in the thickness direction by a hot-melt adhesive or the like (see Figs. 2B and 3B). Examples of the application pattern of the adhesive include an? Pattern, a spiral pattern, a stripe pattern, and the like. This also applies to other adhesives described later.

The absorbent body 11 includes an absorbent core formed by molding a predetermined liquid absorbent material into a predetermined shape (for example, approximately hourglass shape as viewed from above), and a core wrap sheet covering the outer peripheral face of the absorbent core, Is a member that absorbs excreted liquid such as urine when the diaper 1 is worn. As such liquid absorbent materials, liquid absorbent granules such as liquid absorbent fibers (e.g., pulp fibers) and superabsorbent polymers (so-called SAP) are exemplified. As the core wrap sheet, a liquid pervious sheet such as a tissue paper or a sheet of nonwoven fabric can be used. The shape of the absorber 11 is not limited to being approximately hourglass-shaped as viewed from above as shown in Fig. 3A, and may have any other shape.

The top sheet 13 is formed by a liquid-permeable sheet such as an air-through nonwoven fabric, and its planar size is one size so as to protrude from both sides in the longitudinal direction of the absorber 11 and from both sides in the transverse direction of the absorber 11. However, the top sheet 13 is not limited to this, and may be formed of a flexible sheet member having liquid absorbency.

The back sheet 15 is formed by superimposing and joining two sheet members of a sanitary sheet 15f and an outer sheet 15n together in the thickness direction as shown in Fig. 3B. The seb skin sheet 15f is a liquid impermeable sheet member made of a polyethylene (PE) film, a polypropylene (PP) film or the like, and disposed on the skin side in the thickness direction of the back sheet 15. The outer sheet 15n is a sheet member made of a nonwoven fabric or the like and is disposed on the non-skin side in the thickness direction of the back sheet 15 and constitutes the outer surface of the absorbent main body 10. [ However, the back sheet 15 is not limited to the above-mentioned configuration as long as it has a certain fluid resistance. The back sheet 15 is also a sheet having a planar size such that the sheet is projected from both sides in the longitudinal direction of the absorber and from both sides in the transverse direction of the absorber. The top sheet 13 and the back sheet 15 are superimposed and joined together in the thickness direction so that the both end portions of the top sheet 13 and the back sheet 15 substantially have the V-shape substantially in the longitudinal direction, The absorber is held.

As shown in Figs. 3A and 3B, the leg gathers 20 are longitudinally elongated sheet members joined to both lateral sides of the absorbent main body 10, and the diaper 1 is formed into a pants shape Shrinks along the leg opening HL to form a pleated leg gathers. Each of the leg gathers 20 is formed by stacking two sheets of a first sheet 21 and a second sheet 22 made of nonwoven fabric in the thickness direction. On the other hand, the absorbent main body 10 and the leg gathers 20 are formed such that the transversely inner ends of the leg gathers 20 are sandwiched between the top sheet 13 of the absorbent main body 10 and the back sheet 15 By using a hot melt adhesive or the like.

As shown in Figs. 3A and 3B, the belt portion 30 is a longitudinally elongated sheet member provided on both lateral sides of the leg gathers 20, and when the diaper 1 is manufactured in a pants shape, Thereby forming a belt (see Fig. 1). Each of the belt portions 30 is formed by overlapping two sheets of the first sheet 31 and the second sheet 2 made of nonwoven fabric in the thickness direction.

As described above, in the present embodiment, the respective leg gathers 20 and the belt portions 30 are integrally formed by the sheet member 40, which is one member. The first sheet 21 of the leg gathers 20 and the first sheet 31 of the belt 30 are configured as the first sheet 41 and the second sheet of the leg gathers 20 22 and the second sheet 32 of the belt portion 30 are also configured as the second sheet member 42. [ In this embodiment, the portion of the sheet member 40 disposed on the inner side in the transverse direction with respect to the folding line FL serves as the leg gathers 20, and the portion disposed on the outer side in the transverse direction with respect to the folding line FL, (30).

Each leg opening HL is formed so as to extend over the folding line FL. The leg opening HL includes a leg gath cut section 25 formed by cutting the first sheet 21 and the second sheet 22 of the leg gathers 20 as described above, And a belt cutting portion 35 formed by cutting the sheet 31 and the second sheet 32. [

A leg gathers elastic member (thread rubber) 23 made of a thread rubber or the like is disposed between the first sheet 21 and the second sheet 22 of the leg gathers 20 in a state of being stretched in the longitudinal direction And fixed with a hot-melt adhesive or the like. In Fig. 3A, two rows of thread rubber 23 are disposed at positions further inside than the transversely inner ends (i.e., the transversely inner ends of the leg openings HL) of the leg gath cutter 25. These elastic yarns 23 can impart elasticity to the respective leg gathers 20 in the longitudinal direction. As a result, when the diaper 1 is made into a pants type, the leg gathers 20 are contracted along the leg openings HL to form a pleated leg gathers, so that the fit property of the wearer's legs ) Can be improved.

Similarly, a belt elastic member (yarn rubber) 33 made of an elastic rubber or the like is disposed between the first sheet 31 and the second sheet 32 of the belt portion 30 in a state of being stretched in the longitudinal direction , Hot melt adhesive, or the like. 3A, a plurality of thread rubbers 33 are arranged side by side in the lateral direction outer end portion of the belt cutout portion 35 (that is, the lateral outer end portion of the leg opening HL) . Elasticity in the longitudinal direction can be imparted to each of the belt portions 30 by the thread rubber 33. [ Thus, when the diaper 1 is made into a pants shape, contraction force along the waist opening HB is developed over almost the entire area of each belt portion 30, and when the diaper 1 is worn, Slipping down is suppressed.

Between the first sheet 41 (21, 31) and the second sheet member 42 (22, 32), it is preferable that an elastic sheet 43 formed of a nonwoven fabric having elasticity is provided. The elastic sheet 43 is a band-like elastic sheet member that is wider than the width of the leg openings HL in the lateral direction as shown by the shaded portion in Fig. 3A. The elastic sheet 43 also includes an opening having the same shape as the leg opening HL and is fixed to the sheets 41 and 42 with a hot melt adhesive or the like in a state of being stretched in the longitudinal direction. Thereby, the peripheral edge portion of the leg opening HL is reinforced by the elastic sheet 43 over its entire circumference (the dotted pattern portion in Fig. 1). Further, the pitability at the periphery of the leg opening HL is further improved due to the contractive force developed by the flat elastic sheet 43. [ If only the thread rubber such as the thread rubber 23 is provided thereon without providing the elastic sheet 43 on the peripheral edge of the leg opening HL, it is easy to form a crease between the thread rubbers, The leg openings HL may become loose when worn, and the marks of the thread rubber may remain on the wearer's skin. Conversely, when the planar elastic sheet 43 is disposed on the periphery of the leg opening HL, the pitability can be improved. Since the diaper 1 usually uses a lightly colored material such as nonwoven fabric, the color tone of the first bonding portion WL1 to which a plurality of members are bonded is increased. However, when the elastic sheet 43 is disposed, the number of members increases, and the color tone of the first bonding portion WL1 can be less noticeable.

As an example of such an elastic sheet 43, a so-called gear drawing treatment (non-woven fabric) is applied to a nonwoven fabric including elastomeric fibers exhibiting substantially elasticity such as polyurethane-based elastomers and thermoplastic resin fibers exhibiting substantially inelastic properties such as polyolefin- For example, a nonwoven fabric exhibiting stretchability. However, the present invention is not limited to this.

3B, in the transverse direction outer end region of the belt portion 30, the first belt end folding line FLb1 and the second belt end folding line FLb2 extend inward in the transverse direction twice It is preferable to fold the folded portion FLB in a folded state with a hot-melt adhesive or the like to provide a folded portion FLB (FIG. 1). Each of the second belt end folding lines FLb2 is a portion that becomes the transversely inner side end portion 30ei of each of the belt portions 30 in Fig. 2A and a portion that becomes the waist opening portion HB. By configuring the waist opening portion HB to have such an end folded structure, the stress on the waist of the wearer when wearing the diaper 1 can be reduced. Further, similar to the elastic sheet 43 of the leg opening HL, the waist opening HB can make the color tone of the first joint WL1 less conspicuous by the overlapping folded parts FLB So that it is possible to alleviate the possibility that the same impression such as the inside may be damaged. However, the transverse end region does not necessarily have to have the above-mentioned folding structure.

≪ Preparation of diaper 1 >

Next, a manufacturing method of the diaper 1 will be briefly described. Fig. 4 is a view showing an example of a manufacturing process of the diaper 1. Fig.

In this example, the diaper 1 is manufactured by carrying out predetermined processing (S101 to S105) on the base sheet while conveying the base sheet used as the material in the carrying direction. Hereinafter, the conveying direction of the sheet member will be referred to as "MD direction ", and the direction orthogonal to the MD direction will be referred to as" CD direction ". The MD direction is a direction along the longitudinal direction (longitudinal direction) of FIG. 2A, and the CD direction is a direction along the lateral direction of FIG. 2A.

In the present embodiment, the sheet member to be the base sheet of the diaper 1 is composed of the absorbent main body continuous sheet 10A and the side continuous sheet 40A. The absorbent main body continuous sheet 10A is a sheet member in which a plurality of absorbent main bodies 10 are continuously arranged in the longitudinal direction (longitudinal direction). That is, the absorbent main body continuous sheet 10A is a sheet member in a state in which a plurality of absorbers 11 are sandwiched between the continuous sheet of the top sheet 13 extending in the MD direction and the continuous sheet of the back sheet 15 to be. Similarly, the side continuous sheet 40A is a sheet member in which the leg gathers 20 and the sheet member 40 forming the belt portion 30 are continuously arranged in the longitudinal direction (longitudinal direction).

First, as shown in Fig. 4, the base sheet in a state in which the side continuous sheet 40A is bonded to both sides of the absorbent main body continuous sheet 10A in the CD direction (transverse direction) is continuously conveyed in the MD direction (S101) .

Next, a leg gath cut section 25, which is a leg opening HL at a position extending from the side of the substrate sheet to be conveyed over the fold line FL at both sides of the absorber 11 in the CD direction (transverse direction) (Step S102). The cut portion is formed using a cutter roller (not shown) or the like. The state shown in the process of S102 in Fig. 4 corresponds to the diaper 1 in the unfolded state of Fig. 3A.

Next, a portion of the side continuous sheet 40A corresponding to the belt portion 30 is folded inward in the CD direction (lateral direction) from the respective folding lines FL to form a part of the absorbent main body 10, And the belt portion 30 are overlapped in the thickness direction (S103).

Next, the first bonding portion WL1 and the second bonding portion WL2 are formed by ultrasonic welding to bond the belt portion 30, the absorbent main body 10 and the leg gathers 20 (S104).

Next, the substrate sheet is cut (S105). Specifically, each of the diapers 1 is separated from the base sheet continuous in the MD direction, and the four rectangular corners are cut along the first joining portion WL1 and the second joining portion WL2. At this time, it is preferable to cut the base sheet on the welding area WU (described later) to form the front end WLp1 of the first bonding portion and the front end WLp2 of the second bonding portion. By cutting the base sheet on the welding area WU, it is possible to reduce the possibility of peeling from the front end WLp1 of the first bonding portion and the front end WLp2 of the second bonding portion.

As a result, the diaper 1 in the planar state shown in Fig. 2A is formed.

≪ First bonding portion WL1 and second bonding portion WL2 >

Hereinafter, the first bonding portion WL1 and the second bonding portion WL2 will be described in more detail.

A pair of first joining portions WL1 are provided symmetrically with respect to the center line XX on the front side in the front and rear direction and a pair of second joining portions WL2 are provided on the rear side in the forward and backward directions and symmetrically with respect to the center line XX . Since the first bonding portion WL1 and the second bonding portion WL2 have similar configurations in the front-rear direction, the first bonding portion WL1 will be described below.

As shown in Fig. 1, the first abutment WL1 has a shape inclined from the longitudinal front end 10ef near the transverse center of the absorbent main body 10 toward the leg opening HL. The first abutting portion WL1 is a portion joining the absorbent main body 10 and the belt portion 30 and joining the leg gathers 20 and the belt portion 30. [ At this time, the tip end WLp1 of the first joint portion located at the outermost side in the lateral direction of the first joint portion WL1 and the base end WLb1 of the first joint portion located at the innermost side in the lateral direction of the first joint portion WL1 Are approximately parallel to each other.

The longitudinal length of the first bonding portion WL1 is a length from the waist opening HB to the lower end of the first bonding portion WL1 and the length of the end portion of the belt portion 30 in the transverse direction is a distance from the waist opening HB And the length to the lower end of each belt portion side end portion 30es which is the outer end of the belt portion 30. [ At this time, the longitudinal length of the first bonding portion WL1 is longer than the longitudinal length of the belt portion transverse portion 30es. That is, the lower end of the first abutment portion WL1 in the longitudinal direction is formed below the lower end of the belt portion transverse section 30es. Thereby, even if the belt portion 30 extends along the lateral direction by the thread rubber 33, a portion which is not elongated or stretched in the transverse direction is formed below the first joint portion WL1, It is possible to improve the bonding strength of the wiring layer WL1.

It is also preferable that the lower end of the first bonding portion WL1 is spaced apart from the leg opening HL by a predetermined distance. In this embodiment, the leg gathers 20 and the belt portions 30 are formed by one sheet member 40. [ At this time, if the lower end of the first joint portion WL1 is formed on the upper side so as to be spaced a predetermined distance (for example, about 2 to 10 mm) from the leg opening HL, the leg gathers 20 and the belt portion 30 A connected portion is formed. The transverse outer end portion 20eo in Fig. 2 is a portion to which the leg gathers 20 and the belt portion 30 are connected in a state of being formed in the pants shape shown in Fig. Thereby, the lower end of the first joint portion WL1 having a relatively high rigidity is prevented from directly contacting the skin of the wearer, and the discomfort felt by the wearer can be reduced. The first joining portion WL1 joining the leg opening portion 20 and the belt portion 30 is subjected to joining treatment to one sheet member 40 so that the joining strength can be improved, Peeling can be reduced.

Fig. 5 is a view for explaining a portion b in Fig. 2. Fig.

As shown in Fig. 5, in each of the first bonding portions WL1, a plurality of welded regions WU joined by ultrasonic bonding are formed. In the present embodiment, ultrasonic bonding is used for bonding the first bonding portions WL1, but bonding can be performed by welding such as thermal bonding or by using an adhesive such as a hot melt adhesive.

Since the diaper 1 is usually formed of a nonwoven fabric or the like, it is characterized in that it is smooth and has a good touch. However, if the welding area WU is formed in the entire region of each first bonding portion WL1 without a gap, the first bonding portion WL1 becomes hard. For this reason, in the present embodiment, a plurality of welded regions WU of triangles are formed to provide a bonded portion and a non-bonded portion in the region of each first bonded portion WL1, WL1) is reduced.

At this time, a plurality of welding areas WU are arranged in order in parallel with the front end WLp1 (first overlap area LA1 described later) of the first welding part to form a row of welding areas WU, It is preferable to provide the plurality of rows of the regions WU in parallel with the tip WLp1 of the first junction. The row arranged in the direction of the arrow R1 in Fig. 5 is the row on the base end WLb1 side of the first joint, and the row arranged in the direction of the arrow R2 is the row on the tip WLp1 side of the first joint. For example, when excessive force is applied to the first bonding portion WL1 at the time of wearing the diaper 1 and the row R1 of the welding area WU at the base end WLb1 side of the first bonding portion is peeled off, The joining of the row R2 of the welding area WU on the side of the front end WLp1 of the joining part is maintained. This can alleviate the possibility that the first bonding portion WL1 is completely peeled off.

A portion where the weld region WU and the seal rubber 33 overlap each other and a portion where the seal region WU and the seal rubber 33 do not overlap are formed at the tip WLp1 of the first joint portion WL1 . The thread rubber 33 that overlaps the welding area WU is referred to as a first elastic member 33a and the thread rubber 33 that does not overlap with the welding area WU is referred to as a second elastic member 33b The absorbent main body 10 and the sheet member 40 as well as the first elastic member 33a are overlapped at the portion of the leading end WLp1 of the first joint portion provided with the first elastic member 33a, When the ultrasonic bonding is performed from above, there is a possibility that the bonding strength is lowered due to the first elastic member 33a. However, a second elastic member 33b which does not overlap with the welding area WU is provided at the front end WLp1 of the first joining part and a second elastic member 33b located between the adjacent welding areas WU, The lowering of the bonding strength of the first bonding portion WL1 can be reduced.

It is also preferable that the interval L33 between the adjacent yarn rubbers is smaller than the interval Lwu between adjacent weld zones WU. The distance L33 between adjacent yarn rubbers 33 is the distance from the center of the yarn rubber 33 to the center of the adjacent yarn 33 (hereinafter also referred to as "pitch"), The interval Lwu between the welding areas WU is the distance from the center of gravity of the welding area WU to the center of gravity of the adjacent welding area WU. Each of the yarn rubbers 33 has an elastic force that pulls in the transverse direction at the portion where the yarn rubber 33 is provided, but the pitch of the welding region WU is smaller than the pitch at which the elastic force of the yarn rubber 33 acts The bonding strength of the first bonding portion WL1 can be further improved.

Fig. 6 is a view for explaining a portion a in Fig. 1. Fig.

When the distance from the base end WLb1 of the first joint portion to the front end WLp1 of the first joint portion is defined as L, it is preferable to make the length L shorter toward the waist opening HB. As shown in Fig. 6, when L1, L2, and L3 are close to the waist opening HB in this order, L1 <L2 <L3. Each of the first bonding portions WL1 is formed by cutting from the front end WLp1 of the first bonding portion on the upper portion of the first bonding portion WL1 on the waist opening portion HB toward the base end WLb1 of the first bonding portion. As a result, the first joint portion WL1 can be made less visible, and the discomfort felt by the wearer when the first joint portion WL1 touches the wearer's abdomen when the diaper 1 is worn can be reduced.

Fig. 7 is a view showing the first bonding portion WL1 of the diaper 1 with the belt portion 30 stretched along the lateral direction. 7, a state in which the belt portion 30 of the diaper 1 is stretched in the transverse direction is referred to as a state in which the belt portion 30 is stretched in the lateral direction while the diaper is worn by the wearer . Substantially all of the yarn rubbers of the belt portion 30 are stretched from the state in which the yarn rubbers 30 of the belt portion 30 are stretched to such an extent that the wrinkles and gathers are not visible in the transverse direction, (Preferably, 63% shrunk) in a state in which the shroud 30 is shrunk by 48 to 78%.

8A is a schematic cross-sectional view taken along the line C-C in Fig. 8B is a schematic cross-sectional view taken along the line D-D in Fig. 8C is a schematic cross-sectional view taken along the line E-E in Fig. FIG. 8D is a schematic cross-sectional view taken along line F-F of FIG. 8A is a cross-sectional view of a portion of the first joint WL1 where the absorbent main body 10 and the folded portion FLB of the belt portion 30 are joined together and shows the upper side of the first belt end folding line FLb1. 8B shows a portion of the first bonding portion WL1 bonded with the belt portion 30 and the absorbent main body 10 below the folding portion FLB. Figs. 8 and 8D are portions where the leg gathers 20 and the belt portion 30 are joined, respectively.

8A, 8B, 8C, and 8D, the sheet member 40 (31, 32) constituting the belt portion 30 is overlapped with the absorbent main body 10 in the first overlapping area LA1, , And a welding region WU is formed in the first overlap region LA1 to form the first bonding portion WL1. At this time, it is preferable that the tip end WLp1 of the first junction and the tip end of the first overlapping area LA1 are formed at the same position. Specifically, by forming the first joining portion WL1 in the first overlapping area LA1 in the manufacturing process (S104) described above and by forming the first overlapping area LA1 and the first joining portion WL1 in S105 The leading end WLp1 of the first junction and the tip of the first overlapping area LA1 can be formed at the same position by cutting the overlapped portion.

In this way, the first abutment portion WLp1 can be made smaller, and it is possible to alleviate the impression of the same impression in the pants-type diaper 1 provided on the front side of the back side of the abutment portion. On the other hand, the state where the front end WLp1 of the first joint portion of the diaper 1 in the state in which the belt portion 30 is stretched in the transverse direction and the front end of the first overlapping region LA1 are formed at the same position, The leading end WLp1 of the first joint portion and the first overlapping region LA1 are formed at the same position with respect to the normal pull-on diaper 1 as well.

8A and 8B, in the portion of the first joint WL1 where the absorbent main body 10 and the belt portion 30 are joined, the absorbent main body 10 is provided on one side in the front-rear direction And the sheet member 40 is located on the other side of the absorbent main body 10. That is, it is preferable that the first bonding portion WL1 is inclined toward the belt portion 30, and the tip WLp1 of the first bonding portion is located on the belt portion 30 side.

Thus, the first joints WL1 each having a relatively high rigidity reduce the sense of discomfort such as the ruggedness felt by the wearer, and the possibility that the first joint WL1 protruding from the garment worn on the diaper can be seen So that the first joint portion WL1 can be made less conspicuous.

At this time, when the absorbent main body 10 does not include the elastic member along the lateral direction and the belt portion 30 includes the belt elastic member 33 such as the thread rubber (Fig. 7), the belt portion 30 The first junction WL1 inclined toward the first junction W1 may be formed. The first joining portion WL1 is tilted toward the side of the belt portion so that the first joining portion WL1 is in contact with the first joining portion WL1, Can be made even less noticeable.

When the angle formed by the first bonding portion WL1 and the adjacent sheet members 40 and 31 is θ, the first bonding portion WL1 and the adjacent sheet member (not shown) in the folding portion FLB of FIG. 40 is preferably smaller than 45 degrees. Likewise, the angle? 2 formed by the first joint portion WL1 and the adjacent sheet member 40, which are the belt portion 30 and the absorbent main body 10, which are lower than the folding portion FLB of FIG. 8B, Preferably less than 45 [deg.]. As a result, the first joint portion WL1 can be made less conspicuous.

The angle? 3 formed by the first joint portion WL1 and the adjacent sheet member 40 to which the leg gathers 20 and the belt portions 30 of FIG. 8C are joined and the leg gathers 20 And the belt member 30 and the adjacent sheet member are preferably larger than? 1 and? 2, respectively. In particular, it is preferable that? 3 is 45 degrees or more and? 4 is 45 degrees or more.

8C, the yarn rubbers 23 along the longitudinal direction of the leg gathers 20 and the yarn rubbers 33 along the lateral direction of the belt portions 30 of the first joints WL1 In the intersecting part,? 3 is almost perpendicular. In the present embodiment, this is derived from the action of the yarn rubber 23 having a pulling force and the yarn rubber 33 having a pulling force transversely.

7, yarn rubbers 23 and 33 are not provided on the leg gathers 20 and the belt portion 30 joined by the first joint portion WL1. However, in the cross section taken along the FF line of Fig. 7, The yarn rubbers 23 of the gathers 20 are provided closer to the cross section taken along the FF line than the yarn rubbers 33 of the belt portion 30. [ Accordingly, the first bonding portion WL1 is not influenced by the pulling force of the thread rubber 23, and? 4 is larger than? 3.

As a result, not only the thread rubber 33 of the belt portion 30 but also the thread rubber 23 of the leg gathers 20 are appropriately provided so that the first joint portion WL1 and the adjacent sheet member 40 Can be changed. The wearer of the diaper 1 can visually recognize the first joint WL1 due to the difference in inclination of the first joint WL1 while feeling the same impression by the compact first joint WL1 as a whole So that anxiety such as peeling of the joint portion can be reduced. Further, the boundary between the leg gathers 20 and the belt portion 30 is easily recognized, and the boundary portion can be used as a supporting portion for lifting the diaper 1 when the diaper is worn.

Other embodiments

Although the embodiments of the present invention have been described above, the embodiments are for the purpose of facilitating understanding of the present invention and are not intended to interpret the present invention in any way. It is needless to say that modifications and improvements will be made thereto without departing from the spirit of the present invention, and equivalents thereof are also included in the present invention. For example, the following modifications are possible.

In the above-described embodiment, the weld zones WU are each formed into a triangle, but the shape is not limited thereto. For example, the welding areas WU may be formed in various shapes such as a circle and a square, respectively, and provide a plurality of rod-shaped welding services parallel to the front end WLp1 of the first joint and the front end WLp2 of the second joint can do.

In the above-described embodiment, the first bonding portion WL1 is formed on the front side and the second bonding portion WL2 is formed on the rear side, but the second bonding portion WL2 is not necessarily formed on the back side. Often, by providing at least the first abutment WL1 on the prominent front side, it is possible to give the wearer a look that looks like underwear. In addition, by providing the second joint WL2 on the rear side, it is possible to give the wearer the impression that looks like an underwear on the front side as well as on the rear side.

The present invention relates to an absorbent article and a disposable diaper, and more particularly, to an absorbent article and disposable diaper, comprising: a diaper (absorbent article, disposable diaper) A leg sheet gathering continuous sheet, 20eo: a transverse direction outer end portion, 21: a first sheet, 22: a second sheet, 23: a leg gathers elastic member, (30), wherein the first sheet (32) and the second sheet (32) are made of the same material as the first sheet (32) A second sheet 33 a belt elastic member 33a a first elastic member 33b a second elastic member 35 belt cut section 40 sheet member 40A side continuous sheet 41 first sheet FL: folding line, FLb1: first belt end folding line, FLb2: second folding line, second folding line, second folding line, Belt end fitting WL1 is the base end of the first joint, WLp2 is the second joint, WL2 is the first joint, WL2 is the second joint, WLp1 is the tip of the first joint, WLb1 is the base of the first joint, WLp2 is the second joint, WLb2: base end of the second joint, WU: welded area

Claims (7)

An absorbent article comprising a longitudinal direction, a transverse direction and a longitudinal direction,
An absorbent body along said longitudinal direction; And
A sheet member including a belt portion along the lateral direction and a pair of leg gathers along the longitudinal direction;
/ RTI &gt;
A waist opening and a pair of leg openings are formed,
Wherein the first joint portion and the second joint portion are provided on one side and the other side in the front and rear direction, respectively, and the first joint portion and the second joint portion extend from the waist opening side toward the respective leg openings in the longitudinal direction, Wherein at least the absorbent main body and each of the sheet members are bonded to each other at the first joint and the second joint,
In a state in which the belt portion is stretched in the transverse direction,
Wherein each of the first joints includes a region where each of the sheet members is positioned on the other side than the absorbent main body. The method according to claim 1,
And each of the second joints includes a region where each of the sheet members is located on the one side of the absorbent main body. 3. The method of claim 2,
The absorbent main body and the belt portion are bonded to each other at the first joint portion and the second joint portion,
The absorbent main body does not include an elastic member along the lateral direction,
And the belt portion includes an elastic member along the transverse direction. The method of claim 3,
The belt portion and the leg gathers are bonded to each other at the first joint portion and the second joint portion,
Wherein the leg gathers comprise elastic members along the longitudinal direction. 5. The method according to any one of claims 2 to 4,
In each of the first joining portions, an angle formed by each of the first joining portions and each of the sheet members adjacent to the first joining portions is 45 ° is provided,
In each of the second joints, an angle formed by each of the sheet members adjacent to each of the second joint portions and the second joint portions is 45 Deg.] Is provided. 6. The method according to any one of claims 2 to 5,
In each of the first joints, an angle formed by each of the first joint portions and each of the belt portions adjacent to each of the first joint portions is An area of greater than 45 degrees is provided,
In each of the second joints, an angle formed by each of the second joint portions and each of the belt portions adjacent to each of the second joint portions is Wherein an area of 45 DEG or more is provided. 7. The method according to any one of claims 1 to 6,
Wherein the first overlapping region and the second overlapping region are provided on one side and the other side in the front and rear direction, respectively, and the first overlapping region and the second overlapping region are respectively connected to the legs At least the absorbent main body and each of the sheet members are overlapped in each of the first overlapping area and the second overlapping area,
In each of the first overlapping regions, at least the absorbent main body and each of the sheet members are bonded at each of the first joining portions,
At least the absorbent main body and each of the sheet members are bonded to each other at each of the second joining portions in each of the second overlapping regions,
And the tips of the first joints are formed at the same positions as the tips of the first overlap regions.

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