JP2011083326A - Underpants type absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underpants type absorbent article for preventing a side seal part from becoming hard easily and improving texture. <P>SOLUTION: The underpants type absorbent article 1 includes a pair of side seal parts 8, 8 formed by fusing both side edge parts 6a, 6a of an abdominal side part A and both side edge parts 6b, 6b of a back side part B by a plurality of embossed parts 7. In the pants type absorbent article 1, the embossed parts 7 are disposed at predetermined intervals along the respective side edge parts 6a, 6b of the abdominal side part A and the back side part B. The embossed parts 7 of the abdominal side part A and the embossed parts 7 of the back side part B are alternately disposed on the cross sectional view, and end parts of the embossed parts 7 of the abdominal side part A and the end parts of the embossed parts 7 of the back side part B are overlapped with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pants-type absorbent article such as a disposable diaper.

Conventionally, a pants having a pair of side seal portions formed by fusing both side edges of the abdominal side and both side edges of the back side, provided with a top sheet, a back sheet, and a liquid-retaining absorber. Various types of absorbent articles of the type have been proposed.
For example, in Patent Document 1, in order to improve the ease of tearing after use, a part of the side seal portion is fused in a V shape or a C shape toward the center in the width direction of the diaper. A disposable diaper is disclosed. Further, in Patent Document 2, in order to improve the ease of tearing after use, the fusion strength of the pair of side seal portions is made different on the left and right sides, and the side seal portion on the side having a relatively low fusion strength is provided. A pants-type disposable diaper adapted for tearing is disclosed. Further, in Patent Document 3, in order to improve the texture and improve the wearing feeling, each of the waist part elastic member, the waist part elastic member, and the leg part elastic member respectively disposed in the waist part, the waist part, and the leg part. A pants-type disposable diaper is disclosed in which both edge portions are all cut by a plurality of seal portions forming a pair of side seal portions.

  However, in the pants-type disposable diapers described in Patent Document 1, Patent Document 2, and Patent Document 3, all of the side seal portions are formed by fusion with embossing common to the ventral portion and the back portion. Therefore, the side seal portion is likely to be hard, and the texture may be inferior.

Japanese Utility Model Publication No. 7-34814 JP 2009-34209 A JP-A-11-140706

  Therefore, the subject of this invention is providing the underpants type absorbent article which a side seal part does not become hard easily and a texture improves.

  The present invention is a pants-type absorbent article having a pair of side seal parts formed by fusing both side edges of the ventral side part and both side edges of the back side part with a plurality of embossed parts, The embossed portions are arranged at predetermined intervals along the side edge portions of the ventral side portion and the dorsal side portion, respectively, and the embossed portion of the ventral side portion and the embossed portion of the dorsal side portion are in a cross-sectional view. Then, the underpants type absorbent article which is alternately arranged and in which the end portions of the embossed portion on the abdominal side and the end portions of the embossed portion on the back side overlap each other is provided.

  According to the pants-type absorbent article of the present invention, the side seal portion is hard to become hard and the texture is improved.

FIG. 1 is a perspective view of a pants-type disposable diaper that is an embodiment of the present invention. FIG. 2 is a developed plan view of the pants-type disposable diaper shown in FIG. 1 in an expanded state. FIG. 3 is an enlarged plan view in which a main part P of the pants-type disposable diaper shown in FIG. 1 is enlarged. FIG. 4 is a developed plan view showing the positional relationship of the embossed part in the side seal part of the pants-type disposable diaper shown in FIG. 5 is a cross-sectional view taken along line Y1-Y1 of FIG. Fig.6 (a) is a bottom view of a pair of embossing roll which provided the uneven | corrugated | grooved part which forms the embossed part of the underpants type disposable diaper shown in FIG. 1 in the axial length direction, FIG.6 (b) is FIG. It is the Y2-Y2 sectional view taken on the line of a), and the Y3-Y3 sectional view.

  Hereinafter, preferable embodiment of the underpants type disposable diaper which is the underpants type absorbent article of the present invention is described based on Drawings 1-6.

The pants-type disposable diaper 1 of the present embodiment is obtained by fusing both side edges 6a, 6a of the abdominal side A and both side edges 6b, 6b of the back side B in a plurality of embossed parts 7 in a palm shape. It has a pair of side seal portions 8 and 8 formed.
As shown in FIGS. 1 and 2, the pants-type disposable diaper 1 according to the present embodiment is formed symmetrically with respect to the center line CL. Accordingly, in the following description, the right side of the symmetrical part will be mainly described.

  The pants-type disposable diaper 1 of the present embodiment will be described in detail. The pants-type disposable diaper 1 of the present embodiment (hereinafter also referred to as “diaper 1”) is a liquid-permeable top sheet as shown in FIG. 2, a substantially vertically long absorbent main body 5 having a liquid impervious (including water repellency) back sheet 3, and an absorbent body 4 interposed between both sheets 2, 3, and The outer layer body 6 is provided on the back sheet side and fixed by adhesion. As shown in FIG. 2, the diaper 1 has an abdominal side A, a crotch C, and a dorsal side in the longitudinal direction (hereinafter referred to as “Y direction”. Y direction: a direction parallel to the center line CL). B. The abdominal side A of the diaper 1 is a part arranged on the wearer's abdomen at the time of wearing, the back side B is a part arranged on the back of the wearer, and the crotch C is worn It is a part arranged in a person's crotch part.

  In the diaper 1, the absorbent body 4 has an hourglass shape (see FIG. 1) in which a central portion in the longitudinal direction (Y direction) is bound inward, and the top sheet 2 and the back sheet 3 each have a rectangular shape. As shown in FIG. 3, the absorbent body 4 is joined to each other at the portions extending from both end edges in the longitudinal direction (Y direction), and the width direction (hereinafter referred to as “X direction”. X direction: the center extending in the longitudinal direction of the disposable diaper 1A). The portions extending from both ends of the line CL) are also joined to each other. By joining in this way, the vertically long rectangular absorbent main body 5 is formed.

  As shown in FIG. 2, the outer layer body 6 extends over the entire outer region of the absorbent main body 5, and is bound inward in the center portion in the longitudinal direction (Y direction). In the diaper 1, the side edges 6 a, 6 a of the ventral side A of the outer layer body 6 and the side edges 6 b, 6 b of the back side B are overlapped with each other and fused in a palm shape by a plurality of embossed parts 7. By forming the pair of side seal portions 8, 8, the pants-type disposable diaper 1 having the waist opening WO and the pair of leg openings LO, LO shown in FIG. 1 is formed. As shown in FIG. 2, the outer layer body 6 is formed of an outer layer sheet 61 that is the outermost surface of the pants-type absorbent article and an inner layer sheet 62 that is disposed on the inner surface side of the outer layer sheet 61.

  As shown in FIGS. 1 and 2, a waist elastic member 11, a waist elastic member 12, and a leg elastic member 13 are arranged between the outer layer sheet 61 and the inner layer sheet 62 constituting the outer layer body 6, and a waist elastic region. (Waist gather), a waistline elastic region (a waistline gather), and a pair of annular leg elastic regions (leggather) are formed. More specifically, the waist elastic region (waist gather) has a plurality of waist elastic members 11 outward in the longitudinal direction (Y direction) from the absorbent main body 5, as shown in FIGS. It is formed by adhering in a stretched state between both side edges 6a1, 6a1 on the ventral side A of the body 6 and both side edges 6b1, 6b1 on the back side B. Similarly, as shown in FIGS. 1 and 2, the waistline elastic region (the waistline gather) includes a plurality of waistline elastic members 12 between the waist elastic member 11 and the outer layer body 6 and the outer layer body 6. It is formed by adhering in a stretched state between both side edges 6a1, 6a1 on the ventral side A and both side edges 6b1, 6b1 on the back side B.

  The leg elastic region (leg gather) has a plurality of leg elastic members 13 in the ventral side portion A, as shown in FIGS. 1 and 2, on one side edge (left side in FIG. 2) of the ventral side portion A. 6a1 is fixed along the constriction of one side of the ventral side A (left side in FIG. 2), passes through the crotch part C, and goes along the constriction of the other side (right side of FIG. 2) of the ventral side part A. The other side (the right side in FIG. 2) is fixed in a stretched state until reaching the side edge 6a1, and is cut at the center of the crotch part C (the part including the center line CL). Similarly, the leg elastic region (leg gather) has a plurality of leg elastic members 13 on one side of the back side portion B (left side in FIG. 2) as shown in FIGS. Adhering from the side edge 6b1 along one side of the back side B (left side in FIG. 2), passing through the crotch C, and along the other side (right side in FIG. 2) of the back side B It is formed by being fixed in a stretched state until reaching the other side edge 6b1 of the part B (right side in FIG. 2), and cutting at the center part of the crotch part C.

  The plurality of embossed portions 7 forming the pair of side seal portions 8 and 8 are predetermined along the side edge portions 6a and 6b of the ventral side portion A and the back side portion B as shown in FIGS. Arranged at intervals. The embossed portion 7 of the ventral side A (hereinafter also referred to as “ventral side embossed portion 7a”) and the embossed portion 7 of the back side portion B (hereinafter also referred to as “backside embossed portion 7b”) are shown in FIG. As shown in the cross-sectional view, they are alternately arranged so that the end portions of the ventral-side embossed portion 7a and the end portions of the dorsal-side embossed portion 7b overlap each other. Hereinafter, the ventral embossed portion 7a and the back embossed portion 7b will be specifically described.

  It is preferable that 8 to 25 ventral embossed portions 7a are arranged at predetermined intervals in the longitudinal direction (Y direction) along the side edge 6a of the outer layer body 6 in the ventral side A, As shown in FIG. 1, nine ventral-side embossed portions 7a of the present embodiment are arranged on one side edge 6a. As shown in FIGS. 3 and 4, the nine ventral embossed portions 7 a of this embodiment are arranged at substantially equal intervals so as not to overlap each other, and each of the nine ventral embossed portions 7 a is the same. It is formed in the same size. As shown in FIG. 1, the ventral embossed portion 7 a can be confirmed to be arranged along the side seal portion 8 when the diaper 1 is viewed from the ventral portion A side in front, and the shape thereof is the diaper 1. Is formed to such an extent that it can be seen through from the back side B side.

  It is preferable that 8 to 25 back embossed portions 7b are arranged at predetermined intervals in the longitudinal direction (Y direction) along the side edge 6b of the outer layer body 6 in the back side B, As shown in the same manner as the ventral embossed portion 7a, nine backside embossed portions 7b of the present embodiment are arranged on one side edge 6b. As shown in FIGS. 3 and 4, the nine back embossed portions 7 b of this embodiment are arranged at substantially equal intervals so as not to overlap each other, and each of the nine back embossed portions 7 b Like the side embossed part 7a, it is formed in the same shape and size. That is, the ventral embossed portion 7a and the back embossed portion 7b have the same shape and the same size (area). Contrary to the ventral embossed portion 7a, the backside embossed portion 7b can be confirmed to be arranged along the side seal portion 8 when the diaper 1 is viewed from the backside B side in front. The diaper 1 is formed so as to be seen through from the front side of the abdominal side A, and the entire shape of the back embossed portion 7b is indicated by a wavy line in FIG.

  In the present embodiment, each of the nine ventral-side embossed portions 7a and the nine back-side embossed portions 7b has a picture pattern in plan view as shown in FIGS. Specifically, the outer shape of each of the ventral embossed portion 7a and the dorsal embossed portion 7b is formed in a heart-shaped pattern as shown in FIGS. 3 and 4, and each of the apexes 7a1 and 7b1 of the heart-shaped pattern. Is arranged so as to face the center line CL side. In addition, although the external shape of each of the ventral-side embossed portion 7a and the dorsal-side embossed portion 7b of this embodiment is a heart-shaped pattern, it is formed by combining a rectangular shape, a triangular shape, or a plurality of shapes other than the heart shape. It may be a four-leaf or petal-like pattern.

Ventral embossed portions 7a and the back side embossed portions 7b of the respective areas, should be arranged so able to cleave a resilient member arranged abdomen (viewpoint) is preferably 5mm ² ~50mm ^2, it is more preferably 9 mm ² 25 mm ^2. Here, the area of the embossed portion 7 is an area of a portion embossed by a method described later. Specifically, the embossed portion 7 of the side seal portion 8 is viewed in plan and is formed into a film by an embossing process. It shows the area of the part of the bottom face of the embossing part in plan view.

  In the present embodiment, each of the nine back embossed portions 7b is arranged outward in the width direction (X direction) from each of the nine ventral embossed portions 7a, as shown in FIGS. . Specifically, as shown in FIG. 4, each of the ventral embossed portion 7 a and the back embossed portion 7 b includes an end portion on the side seal portion 8 side of the ventral embossed portion 7 a and a ventral side portion A of the outer layer body 6. At a position where the distance L1 between the side edge 6a1 is longer than the distance L2 between the end of the back side embossed part 7b on the side seal part 8 side and the side edge 6b1 of the back side part B of the outer layer body 6. It is arranged. Here, the distance L1 is preferably 3 mm to 10 mm, more preferably 5 mm to 8 mm, and the distance L2 is preferably 2 mm to 4 mm, more preferably 3 mm to 5 mm. The distances L1 and L2 are measured in a state in which the side seal portion 8 formed by the embossed portion 7 is extended.

  As shown in FIG. 5, each of the nine ventral-side embossed portions 7 a and the nine back-side embossed portions 7 b are alternately arranged in a sectional view of the side seal portion 8 of the diaper 1. As shown in FIG. 5, each of the nine ventral embossed portions 7a and the nine dorsal embossed portions 7b is arranged so that the end portions of the ventral side embossed portion 7a and the end portions of the backside embossed portion 7b overlap each other. Has been. The thickness of the portion 7c where the end portions of the ventral-side embossed portion 7a and the back-side embossed portion 7b overlap is formed thinner than the thickness of the ventral-side embossed portion 7a or the dorsal-side embossed portion 7b other than the overlapping portion 7c. Yes. The portion 7c where the end portions of the ventral embossed portion 7a and the dorsal embossed portion 7b overlap each other along the side seal portion 8 when the diaper 1 is viewed from the ventral portion A side as shown in FIG. It can be confirmed that it is formed, and it can be confirmed that the diaper 1 is formed even when viewed from the back side B side.

  In the diaper 1, both side edges 6a, 6a of the ventral side A of the outer layer body 6 and both side edges 6b, 6b of the back side B are located between end parts of the ventral embossed part 7a and the back embossed part 7b. The side seal portion 8 is formed by being fused by the overlapping portion 7c. That is, in the ventral embossed portion 7a or the dorsal embossed portion 7b excluding the overlapping portion 7c, only the embossed pattern is formed on the outer layer sheet 61 of the outer layered body 6, and the ventral side portion of the outer layered body 6 is formed. Both side edges 6a, 6a of A and both side edges 6b, 6b of the back side B are not fused or are fused very weakly even if they are fused. Thus, the fusion strength of the overlapping portion 7c between the end portions of the ventral embossed portion 7a and the dorsal embossed portion 7b is the same as that of the ventral embossed portion 7a or the dorsal embossed portion 7b except for the overlapping portion 7c. It is much higher than the fusion strength. In other words, the rigidity of the overlapped portion 7c where the side edge portion 6a of the outer layer body 6 and the side edge portion 6b of the back side portion B are fused only forms an embossed pattern, or the outer layer body 6 The rigidity of the ventral-side embossed portion 7a (excluding the overlapping portion 7c) or the back-side embossed portion 7b (excluding the overlapping portion 7c) in which the side edge portion 6a and the side edge portion 6b are fused very weakly Higher than. Here, the fusion strength of the portion 7c where the end portions of the abdominal embossed portion 7a and the back embossed portion 7b overlap each other needs to be able to withstand the abdominal circumference variation accompanying the variation of the user's body shape in the wearing state. 8 N / mm to 28 N / mm, and more preferably 12 N / mm to 20 N / mm. The fusion strength of the ventral embossed portion 7a or the back embossed portion 7b (excluding the overlapping portion 7c) is preferably 10 N / mm to 30 N / mm, and preferably 15 N / mm to 25 N / mm. Further preferred.

<Measurement method of fusion strength>
Cut into a rectangular shape so as to include one portion 7c where the end portions of the ventral-side embossed portion 7a and the back-side embossed portion 7b overlap each other. Specifically, in a range of 50 mm in the longitudinal direction (Y direction) so as to include one overlapped portion 7c, the side seal portion 8 of the diaper 1 is cut into a 30 mm rectangular shape in the width direction (X direction), A sample for measuring the fusion strength of the overlapping portion including one overlapping portion 7c at one end is obtained. Further, the ventral embossed portion 7a or the back embossed portion 7b is cut into a rectangular shape so as not to include the overlapping portion 7c. Specifically, in a range of 50 mm in the longitudinal direction (Y direction) so as not to include the overlapping portion 7 c, the side seal portion 8 of the diaper 1 is cut into a 30 mm rectangular shape in the width direction (X direction), and the ventral side A sample for measuring the fusion strength of only the embossed portion 7a or the back-side embossed portion 7b is obtained.
The seal strength of each fusion strength measurement sample is measured with a tensile tester [trade name: Autograph AGS50A, manufactured by Shimadzu Corporation]. At that time, measurement is performed at a distance between chucks of 150 mm and a tensile speed of 300 mm / min to obtain the maximum strength. Measurement is performed n = 5 times, and the average value is used as the fusion strength.

  In the present embodiment, the elastic members 11, 12, and 13 positioned at both side edge portions 6a and 6b of the outer layer body 6 are cut by the ventral-side embossed portion 7a or the back-side embossed portion 7b. Specifically, as shown in FIG. 3, waist elasticity fixed in an extended state between both side edges 6a1 and 6a1 on the ventral side A of the outer layer body 6 and both side edges 6b1 and 6b1 on the back side B. The member 11, the waist elastic member 12 and the leg elastic member 13 are all formed in the ventral side embossed portion 7 a or the back side embossed portion at the side edge 6 a in the ventral side A and the side edge 6 b in the back side B of the outer layer body 6. It is cut by the part 7b. The cut of the waist elastic member 11, the waist elastic member 12 and the leg elastic member 13 excludes not only the overlapping portion 7c of the end portions of the ventral embossed portion 7a and the back embossed portion 7b but also the overlapping portion 7c. This is also performed in the ventral embossed portion 7a or the back embossed portion 7b. In this embodiment, as shown in FIG. 3, two waist elastic members 11 and two waist elastic members 12 are cut at one ventral embossed portion 7a (including the overlapping portion 7c). ing. That is, the plurality of embossed portions 7 are arranged at positions where all of the waist elastic member 11, the waistline elastic member 12 and the leg elastic member 13 are cut.

  As a method for fusing the ventral-side embossed portion 7a and the back-side embossed portion 7b, heat embossing, ultrasonic embossing, high-frequency embossing, or the like is used. In the diaper 1, as shown in FIG. 6, a pair of ultrasonic embossing rolls 71 and 72 is used. Specifically, the ultrasonic embossing roll 71 has a convex portion 71a formed so as to correspond to the shape of the ventral-side embossing portion 7a shown in FIGS. 3, 4 and 5, and the ultrasonic embossing roll 72 is , And a convex portion 72b formed so as to correspond to the shape of the back embossed portion 7b shown in FIGS. The ultrasonic embossing roll 71 has a concave portion 72 b ′ corresponding to the convex portion 72 b of the ultrasonic embossing roll 72, and the ultrasonic embossing roll 72 is a concave portion corresponding to the convex portion 71 a of the ultrasonic embossing roll 71. 71a '. As shown in FIG. 6, the ultrasonic embossing roll 71 is provided with convex portions 71a and concave portions 72b ′ alternately in the axial length direction, and the ultrasonic embossing roll 72 is provided with convex portions 72b and concave portions in the axial length direction. 71a 'are provided alternately.

  The distance between the ultrasonic embossing roll 71 and the ultrasonic embossing roll 72, that is, the distance between the convex portion 71 a of the ultrasonic embossing roll 71 and the concave portion 71 a ′ of the ultrasonic embossing roll 72 is determined by each of the elastic members 11, 12, 13. It is arranged to be narrower than the thickness. The same applies to the distance between the convex portion 72 b of the ultrasonic embossing roll 72 and the concave portion 72 b ′ of the ultrasonic embossing roll 71. Between the embossing roll 71 which has the convex part 71a and recessed part 72b 'which were set in this way, and the embossing roll 72 which has convex part 72b and recessed part 71a' alternately, the continuous body of the strip | belt-shaped diaper 1 is used. The side seal portion 8 is formed by embossing the embossing roll 71 and the embossing roll 72 at a position where the side edge portion 6 a and the side edge portion 6 b are overlapped. The convex portions 71a and concave portions 72b 'of the embossing roll 71 and the convex portions 72b and concave portions 71a' of the embossing roll 72 are alternately arranged in a direction perpendicular to the flow direction of the continuous body of the strip-shaped diaper 1 (roll axis length direction). It is arranged. The axial length direction of the embossing rolls 71 and 72 and the longitudinal direction (Y direction) of the diaper 1 are the same.

  The portion 7c where the end portions of the ventral embossed portion 7a and the back embossed portion 7b overlap each other is embossed and fused by the convex portion 71a of the embossing roll 71 and the convex portion 72b of the embossing roll 72, and the ventral side. The embossed portion 7a is embossed by the convex portion 71a of the embossing roll 71 and the concave portion 71a 'of the embossing roll 72, and the outer shape is attached to the outer layer sheet 61 on the ventral side A side of the outer layer body 6, The side embossed portion 7 b is embossed by the convex portion 72 b of the embossing roll 72 and the concave portion 72 b ′ of the embossing roll 71, and the outer shape is attached to the outer layer sheet 61 on the back side portion B side of the outer layer body 6. Yes. Thus, the side seal part 8 is formed by one embossing.

  The waist elastic member 11, the waist elastic member 12, and the leg elastic member 13 that are arranged in the stretched state are all over the side edge 6 a in the ventral side A and the side edge 6 b in the back side B of the outer layer body 6. In addition to being cut by embossing by the convex portion 71 a of the ultrasonic embossing roll 71 and the convex portion 72 b of the ultrasonic embossing roll 72, the convex portion 71 a of the ultrasonic embossing roll 71 and the concave portion 71 a ′ of the ultrasonic embossing roll 72. Is also cut by embossing by the convex portion 72 b of the ultrasonic embossing roll 72 and the concave portion 72 b ′ of the ultrasonic embossing roll 71. Even if the waist elastic member 12 remains in the region of the ventral embossed portion 7a or the back embossed portion 7b after the embossing process, the stretchability is processed so as not to be expressed by the ultrasonic wave during the embossing process. It is preferable. Similarly, the remaining waist elastic member 11 and leg elastic member 13 are preferably processed so that the stretchability is not expressed by the ultrasonic wave during the embossing process.

The forming material of the pants-type disposable diaper 1 of this embodiment is demonstrated.
As the surface sheet 2, the back sheet 3, and the absorbent body 4, each can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers. For example, a hydrophilic and liquid-permeable non-woven fabric can be used as the top sheet 2, and a liquid-impermeable or water-repellent resin film or a laminate of a resin film and a non-woven fabric is used as the back sheet 3. be able to. As the absorbent body 4, an absorbent body composed of absorbent polymer particles and fiber material and covered with tissue paper (not shown) can be used.

  As the outer layer sheet 61 constituting the outer layer body 6 and the inner layer sheet 62 of the back side portion B, any sheet can be used without particular limitation as long as it is normally used for absorbent articles such as disposable diapers. For example, as the outer layer sheet 51 and the inner layer sheet 52, a water-repellent nonwoven fabric or the like can be used.

  The waist elastic member 11, the waistline elastic member 12, and the leg elastic member 13 can be used without particular limitation as long as they are normally used for absorbent articles such as disposable diapers. For example, a stretchable material made of natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene-α olefin copolymer such as ethyl acrylate-ethylene, or the like can be used.

Next, the effect at the time of using the underpants type disposable diaper 1 of embodiment of this invention mentioned above is demonstrated.
As shown in FIGS. 3 to 5, the diaper 1 according to the present embodiment has an abdominal embossed portion 7 a and a back embossed portion 7 b arranged alternately in a cross-sectional view of the side seal portion 8 of the diaper 1. It arrange | positions so that the terminal part of the side embossing part 7a and the terminal parts of the back | dorsal embossing part 7b may overlap. Accordingly, the fusion strength (rigidity) of the overlapping portion 7c between the end portions of the abdominal embossed portion 7a and the back embossed portion 7b is the same as that of the abdominal embossed portion 7a or the back embossed portion 7b excluding the overlapping portion 7c. It is formed higher than the fusion strength (rigidity). For this reason, the side seal portion 8 of the diaper 1 is formed by dispersing portions with high fusion strength (rigidity), so that the entire side seal portion is hard to be hard and the texture is improved. Further, since the side seal portion 8 of the diaper 1 is formed by alternately forming portions with high fusion strength (rigidity) and portions with low fusion strength, the side seal portion 8 tends to shrink in the vertical direction in the longitudinal direction (Y direction). , The texture is improved.

  Moreover, as shown in FIGS. 3 and 4, the diaper 1 of the present embodiment has the back embossed portion 7b arranged outward in the width direction (X direction) from the ventral embossed portion 7a. Since the side edge part 6a and the side edge part 6b of the back side part B are fused, the space | interval of the site | part 7c which the end part of the abdominal side embossed part 7a and the back side embossed part 7b overlapped is formed widely. The depth is such that it does not directly touch the back-side embossed portion 7b and the ventral-side embossed portion 7a, and the fusion strength of the overlapping portion 7c is easily stabilized. Even at the time of peeling, it is easy to peel off because the weak strength portion is wide.

  Moreover, as shown in FIG. 3, the diaper 1 of this embodiment is the waist elasticity arrange | positioned in the expansion | extension state in the side edge part 6a in the ventral | abdominal side part A of the outer-layer body 6, and the side edge part 6b in the back side part B. Since the member 11, the waist elastic member 12 and the leg elastic member 13 are all cut by embossing with the embossing roll 71 and the embossing roll 72, the shape of the formed back side embossed part 7b and ventral side embossed part 7a Is hard to collapse. In particular, since the outer shape of the back embossed portion 7b and the ventral embossed portion 7a of the diaper 1 of the present embodiment is formed in a heart-shaped pattern, it looks good.

  The pants-type absorbent article of the present invention is not limited to the pants-type disposable diaper 1 of the above-described embodiment, and can be appropriately changed.

  For example, in the above-described pants-type disposable diaper 1 of the present embodiment, as shown in FIGS. 3 to 5, the ventral embossed portion 7 a and the back embossed portion 7 b have the same shape and the same size (area). However, the ventral-side embossed portion 7a and the back-side embossed portion 7b are formed so as to have different outer shapes from the viewpoint of different spacing between the elastic material between the front body and the back body. Also good. Further, the ventral embossed portion 7a and the back embossed portion 7b may have the same outer shape, but the size (area) may be changed.

  Moreover, in the underpants type disposable diaper 1 of the above-mentioned embodiment, as shown in FIGS. 3 to 5, each of the plurality of ventral-side embossed portions 7 a has the same shape and is formed in the same size (area). However, the outer shape may be different. Moreover, even if each of the plurality of ventral-side embossed portions 7a has the same outer shape, the size (area) may be changed. The same applies to the back embossed portion 7b.

  Moreover, in the above-described pants-type disposable diaper 1 of the present embodiment, as shown in FIG. 3, the back embossed portion 7b is arranged outward in the width direction (X direction) from the ventral embossed portion 7a. It does not have to be arranged outward.

  Moreover, in the above-mentioned pants-type disposable diaper 1 of this embodiment, as shown in FIG. 3, all the elastic members 11, 12, and 13 located in the both side edges 6a and 6b of the outer layer body 6 are on the ventral side. Although it is cut by the embossed portion 7a or the back-side embossed portion 7b, it may not be cut.

  In addition to the pants-type disposable diaper, the present invention can be suitably used for absorbent articles such as a pants-type sanitary napkin.

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Absorbent main body 6 Outer layer body 6a, 6b Side edge part 6a1, 6b1 Side edge 61 Outer layer sheet 62 Inner layer sheet 7 Embossed part 7a Abdominal side embossed part 7b Back side embossed Part 7c Site 8 where end portions of ventral side embossed part 7a and back side embossed part 7b overlap each other Side seal part 11 Waist elastic member 12 Girth elastic member 13 Leg elastic member 71, 72 Embossing roll 71a Convex part of embossing roll 71 72b 'Concavity of the embossing roll 71 72b Convex part of the embossing roll 72 71a' Concavity of the embossing roll 72

Claims (5)

A pants-type absorbent article having a pair of side seal parts formed by fusing both side edges of the ventral side part and both side edges of the back side part with a plurality of embossed parts,
The embossed portions are arranged at predetermined intervals along the side edge portions of the ventral side portion and the back side portion, respectively.
The embossed part of the ventral part and the embossed part of the dorsal side part are alternately arranged in a cross-sectional view, and the end parts of the embossed part of the ventral part and the end parts of the embossed part of the dorsal part are between each other. Overlaid pants-type absorbent article.   The pants-type absorbent article according to claim 1, wherein the embossed portion of the back side portion is disposed outward in the width direction from the embossed portion of the abdominal side portion. A substantially vertically long absorbent main body having a top sheet, a back sheet, and an absorber interposed between both sheets, and an outer layer body disposed on the back sheet side of the absorbent main body,
The outer layer body extends over the entire outer side of the absorbent main body, an outer layer sheet forming the outer surface of the pant-type absorbent article, and an inner layer sheet disposed on the inner surface side of the outer layer sheet, An elastic member disposed between the outer layer sheet and the inner layer sheet in a stretched state between both side edges of the ventral side portion and the back side portion of the outer layer body,
The pants-type absorbent article according to claim 1 or 2, wherein the elastic member positioned at each of the side edges is cut by the embossed portion of the ventral side portion or the embossed portion of the back side portion.   The underpants-type absorbent article according to any one of claims 1 to 3, wherein the embossed portion of the back side portion and the embossed portion of the ventral side portion have a pattern pattern in plan view.   The pants-type absorbent article according to claim 4, wherein the outer shape is different between the embossed portion of the back side portion and the embossed portion of the ventral side portion.

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