Diaper

Abstract

To suppress breakage of a fastening tape.SOLUTION: In a fastening tape 1 in which a fastening material 12 fastened to the other side in a longitudinal direction of a diaper body 20 is provided on a tip end part 1B extending to the outside in a width direction of the diaper body 20 from a base part 1A fixed on one side in the longitudinal direction of the diaper body 20, a sheet-like tape base material 11 which forms the base part 1A and the tip end part 1B and is arranged in the longitudinal direction and the width direction includes a first embossment row 30 in which a plurality of first embossed parts 3 having a shape extending in a first direction D1 inclining relative to both the longitudinal direction and the width direction are arranged at a first interval in the first direction D1.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This invention relates to a diaper provided with a tape base material provided with an emboss and an adhesive tape having this tape base material.

Background Art

[0002] Conventionally, an adhesive tape in which an adhesive material for attaching one of the front and rear parts of a diaper to the other is attached to a tape base material is known. Since the adhesive tape is pulled when the diaper is worn by the wearer or when the wearer wearing the diaper moves, it is formed to have a certain strength or more. As a method of ensuring such strength in the adhesive tape, for example, it has been proposed to use a non-woven fabric having an areal weight within a predetermined range and subjected to embossing processing as the tape base material (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Although the front and rear parts of the diaper in a state of being worn by the wearer are connected to each other on both sides in the width direction of the diaper (left and right of the wearer) by the adhesive tape, they may be displaced relative to each other according to the movement of the wearer. For example, when the wearer crawls on the stomach, the front part is likely to be displaced toward the leg side of the wearer with respect to the rear part, and conversely, when the wearer slides while lying on the back, the rear part is likely to be displaced toward the leg side of the wearer with respect to the front part.

[0005] As described above, when the front body and the back body are relatively displaced, a tensile force acts on the tape base material of the fastening tape in a direction inclined with respect to both the longitudinal direction (the direction connecting the front body and the back body in the unfolded state) and the width direction of the diaper. Since the conventional tape base material is not reinforced against such an oblique tensile force, there is a risk that the fastening tape may be damaged by the oblique tensile force.

[0006] The present invention was devised in view of the above problems, and one of its objectives is to suppress damage to the fastening tape.

Means for Solving the Problems

[0007] In the tape base material of the present invention, in a fastening tape provided with a fastening member fixed to the other side in the longitudinal direction of the diaper body at a tip portion extending outward in the width direction of the diaper body from a base portion fixed to one side in the longitudinal direction of the diaper body, it is a sheet-like tape base material forming the base portion and the tip portion and arranged along the longitudinal direction and the width direction, and a plurality of first embosses in a shape extending in a first direction inclined with respect to both the longitudinal direction and the width direction are arranged at a first interval in the first direction, characterized by comprising a first emboss row. The diaper of the present invention is characterized by comprising the fastening tape having the tape base material and the diaper body.

Effects of the Invention

[0008] According to the present invention, damage to the fastening tape can be suppressed.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

MODE FOR CARRYING OUT THE INVENTION

[0010] A mode for carrying out the present case will be described. This embodiment is merely an example, and there is no intention of excluding various modifications and applications of technologies not explicitly stated in the following embodiments. Each configuration of this embodiment can be variously modified and implemented without departing from their gist. Also, they can be selected as necessary, or appropriately combined.

[0011] [1. Configuration] [1-1. Overall configuration] First, referring to FIG. 1, the overall configuration of the diaper 2 according to this embodiment will be described. The diaper 2 is a tape type in which a front body part 2A facing the abdomen of the wearer and a back body part 2B facing the back of the wearer are connected to each other by a fastening tape 1 (hereinafter simply referred to as "tape 1") in a worn state. Here, a paper diaper (so-called "disposable diaper") is exemplified as the diaper 2. In addition to the above-mentioned front body part 2A and back body part 2B, the diaper 2 is provided with a crotch part 2C facing the crotch of the wearer in the worn state. The crotch part 2C is located between the front body part 2A and the back body part 2B in a deployed state where the diaper 2 is spread out flat.

[0012] Hereinafter, the direction connecting the front body part 2A and the back body part 2B in the unfolded state is defined as the "longitudinal direction". Also, the side facing the wearer's skin in the worn state is defined as the "skin side", and the opposite side is defined as the "non-skin side". Furthermore, the direction connecting the skin side and the non-skin side is defined as the "thickness direction", and the direction orthogonal to both the longitudinal direction and the thickness direction is defined as the "width direction". In addition, viewing from the thickness direction is defined as "plan view".

[0013] The diaper 2 of the present embodiment is symmetrically formed with reference to the center line in the width direction (see the dashed-dotted line in FIG. 1). The diaper 2 includes a diaper body 20 having an absorber 21, various sheets 22 to 26, and various gathers 27 to 29, and a tape 1 fixed to the diaper body 20.

[0014] <Diaper body> The diaper body 20 constitutes the main part of the diaper 2. Specifically, one side in the longitudinal direction of the diaper body 20 constitutes either the front body part 2A or the back body part 2B, and the other side in the longitudinal direction of the diaper body 20 constitutes the other of the front body part 2A and the back body part 2B. Also, the middle part in the longitudinal direction of the diaper body 20 (the part between one side and the other side) constitutes the crotch part 2C. Note that the longitudinal direction, width direction, and thickness direction of the diaper body 20 respectively correspond (coincide) with the longitudinal direction, width direction, and thickness direction of the diaper 2. Hereinafter, each component of the diaper body 20 will be described in order.

[0015] The absorber 21 is a mat-like member that absorbs and holds moisture. The absorber 21 is formed, for example, by wrapping a mat in which a super absorbent polymer (SAP) is mixed with fluff pulp with a core wrap sheet such as a hydrophilic non-woven fabric or tissue paper. The absorber 21 extends in the longitudinal direction over the front body part 2A, the crotch part 2C, and the back body part 2B.

[0016] The sheets 22 to 26 are all sheet-like members that spread along the longitudinal direction and the width direction in the unfolded state. On the skin side of the absorber 21, a liquid-permeable center sheet 22 is disposed. The center sheet 22 is formed longer than the absorber 21 in both the longitudinal and width directions and is provided so as to cover the absorber 21 from the skin side. The center sheet 22 is formed of, for example, a woven fabric or a non-woven fabric.

[0017] On the outer side in the width direction of the center sheet 22, a side sheet 23 having liquid impermeability is disposed to prevent liquid leakage from the absorber 21 to the outer side in the width direction. The side sheet 23 is formed of, for example, SMS (Spunbond Meltblown Spunbond) non-woven fabric or SMMS (Spunbond Meltblown Meltblown Spunbond) non-woven fabric. On the non-skin side of the absorber 21, a back sheet 24 having liquid impermeability is disposed to prevent liquid leakage from the absorber 21 to the non-skin side. The back sheet 24 is formed of, for example, a film.

[0018] On the non-skin side of the back sheet 24, a cover sheet 25 (sheet material) is disposed. The cover sheet 25 has a function of reinforcing the back sheet 24 and improving the touch feeling (for example, the feeling of touch). The cover sheet 25 is formed of, for example, a woven fabric or a non-woven fabric. On the non-skin side of the cover sheet 25, a patch sheet 26 forming a target zone to which the tape 1 is locked is attached. In the present embodiment, the patch sheet 26 provided on the front body 2A is exemplified.

[0019] The gathers 27 to 29 are formed by wrinkling the side sheet 23, the cover sheet 25, etc. with an elastic member such as a thread rubber, a natural rubber, or a stretch film. The gathers 27 to 29 have a function of enhancing the followability of the diaper 2 to the wearer. The three-dimensional gathers 27 are provided inside the side sheets 23 in the width direction. The leg gathers 28 are provided at positions along the legs of the wearer in the cover sheet 25. The waist gathers 29 are provided at positions facing the waist (above the buttocks) of the wearer in the cover sheet 25. The waist gather 29 of this embodiment has a plurality of elastic members 29a extending along the width direction. When the waist gather 29 is pulled outward in the width direction, the elastic members 29a generate an elastic force (restoring force) toward the inner side in the width direction.

[0020] <Tape> The tape 1 is fastened to the above patch sheet 26 when the diaper 2 is worn, thereby connecting the front body portion 2A and the back body portion 2B to each other. In this embodiment, an example of the tape 1 that is non-removably attached to the back body portion 2B (one side in the longitudinal direction of the diaper body 20) and removably attached to the front body portion 2A (the other side in the longitudinal direction of the diaper body 20) is shown. Note that the number of tapes 1 is not particularly limited, but here an example is shown where one tape 1 is provided on each of both sides in the width direction of the back body portion 2B.

[0021] The tape 1 has a base portion 1A fixed to the back body portion 2B and a tip portion 1B extending outward in the width direction of the diaper body 20 from the base portion 1A. The base portion 1A is sandwiched between the side sheet 23 and the cover sheet 25 of the diaper body 20 and is fixed to the side sheet 23 and the cover sheet 25. The tip portion 1B is located outside the base portion 1A in the width direction and is fastened to the front body portion 2A when the diaper 2 is worn.

[0022] As shown in FIG. 2, the tape 1 of this embodiment includes a base material 11 (tape base material) forming both the base portion 1A and the tip portion 1B, and an adhering material 12 forming a part of the tip portion 1B. Both of these base material 11 and adhering material 12 are sheet-like members arranged along the longitudinal direction and the width direction of the diaper body 20. Here, an example is given of a rectangular base material 11 that is long in the width direction in plan view and a rectangular adhering material 12 that is long in the longitudinal direction in plan view.

[0023] The base material 11 is formed of, for example, a nonwoven fabric containing thermoplastic fibers. The base material 11 of the present embodiment has a plurality of sheet layers 13 and 14 that are the same shape as each other in plan view, and these sheet layers 13 and 14 form a laminated structure that is stacked in the thickness direction. Here, the base material 11 in which two sheet layers 13 and 14 are overlapped is illustrated. Note that the sheet layers 13 and 14 may be bonded to each other with an adhesive, or may be fixed to each other with embossings 3 and 4 (see FIGS. 3 to 6) described later. Further, the base material 11 may be composed of one sheet layer (single layer).

[0024] The fixing material 12 bears the function of fixing to the patch sheet 26 and constitutes a fastening mechanism together with the patch sheet 26. As this fastening mechanism, for example, a planar fastener that is mechanically coupled by a hook material (male member) and a loop material (female member) can be applied. The fixing material 12 is overlapped on the skin side (one side in the thickness direction) of the base material 11 and is bonded to the base material 11 with an adhesive, for example. Note that the fixing material 12 may be an adhesive tape that can be fixed to the front body 2A.

[0025] [1-2. Main part configuration] Hereinafter, with the diaper 2 in the unfolded state, the main part configuration (the configuration of the tape 1, the waist gather 29, and the cover sheet 25) of the present embodiment will be described.

[0026] <Tape> FIG. 3 is a plan view of a pair of tapes 1 provided on the diaper 2 as viewed from the non-skin side (the other side in the thickness direction). As shown in FIG. 3, a plurality of embossings 3 and 4 for reinforcing the base material 11 are formed on the tape 1 of the present embodiment. Each of the embossings 3 and 4 of the present embodiment is a recess formed by pressing the base material 11 in the thickness direction and is recessed in the thickness direction.

[0027] The embossments 3 and 4 are portions with enhanced strength formed at a high density compared to other portions of the base material 11. The embossments 3 and 4 serve to suppress the fluffing of the fibers contained in the base material 11 and maintain the shape of the base material 11. In the present embodiment, embossments 3 and 4 in which the thermoplastic fibers are welded (or thermocompression bonded) to each other by applying heat or ultrasonic waves to the base material 11 containing thermoplastic fibers are exemplified. Note that the embossments 3 and 4 may be formed by crimping the fibers contained in the base material 11 instead of (or in addition to) such welding. Thus, the embossments 3 and 4 may be reinforced by the fibers being intricately intertwined compared to other portions of the base material 11.

[0028] In the base material 11 of the present embodiment, two types of embossments 3 and 4 having shapes extending in two different directions D1 and D2 from each other are provided. Hereinafter, among the two types of embossments 3 and 4, one having a shape extending in the first direction D1 is also referred to as the "first embossment 3", and the other having a shape extending in the second direction D2 intersecting the first direction D1 is also referred to as the "second embossment 4". Both the first direction D1 and the second direction D2 mentioned here are directions extending linearly in the unfolded diaper 2.

[0029] The first direction D1 is inclined with respect to both the longitudinal direction and the width direction of the diaper body 20. In other words, the first direction D1 intersects both the longitudinal direction and the width direction of the diaper body 20. In the present embodiment, the first direction D1 along the direction toward the front body 2A side (the other side in the longitudinal direction of the diaper body 20, the lower side in FIG. 3) and the outer side in the width direction is exemplified. As shown in FIG. 3, in the diaper 2 in a posture where the back body 2B is located above the front body 2A and the pair of tapes 1 are located on the left and right, the first direction D1 in the right tape 1R is the right diagonally downward direction and the opposite direction (left diagonally upward direction), and the first direction D1 in the left tape 1L is the left diagonally downward direction and the opposite direction (right diagonally upward direction). Thus, in the pair of tapes 1 provided on both sides in the width direction, the first directions D1 are symmetric with respect to each other.

[0030] On the one hand, the second direction D2 of the present embodiment is inclined with respect to the width direction of the diaper body 20 and is inclined on the opposite side of the first direction D1 with respect to the longitudinal direction of the diaper body 20. Therefore, similar to the first direction D1, the second direction D2 of the present embodiment intersects both the longitudinal direction and the width direction of the diaper body 20. Specifically, the second direction D2 is a direction along the direction toward the front body 2A side and the inner side in the width direction. As described above, in the diaper 2 in which the back body 2B is located above the front body 2A and the pair of tapes 1 are located on the left and right, the second direction D2 in the right tape 1R is the lower left diagonal direction and the opposite direction (upper right diagonal direction), and the second direction D2 in the left tape 1L is the lower right diagonal direction and the opposite direction (upper left diagonal direction).

[0031] In the present embodiment, the absolute values of the inclination angles of the first direction D1 and the second direction D2 with respect to the longitudinal direction of the diaper body 20 are set to be equal to each other. Here, the first direction D1 and the second direction D2 in which the absolute values of the inclination angles with respect to the longitudinal direction of the diaper body 20 are both set to 45° are exemplified. Therefore, the first direction D1 and the second direction D2 of the present embodiment are orthogonal to each other.

[0032] As shown in FIG. 4, the first emboss 3 has a shape in which the dimension L1 in the first direction D1 is the largest (larger than the dimensions in other directions) in plan view. Thereby, in the first emboss 3, the tensile strength in the first direction D1 becomes higher than the tensile strengths in other directions. Here, an elliptical first emboss 3 extending in the first direction D1 is exemplified. More specifically, the first emboss 3 has an elliptical shape in which the major axis extends in the first direction D1 and the minor axis extends in the second direction D2.

[0033] On the other hand, the second emboss 4 has a shape in which the dimension L2 in the second direction D2 is the largest (larger than the dimensions in other directions) in plan view. Thereby, in the second emboss 4, the tensile strength in the second direction D2 becomes higher than the tensile strengths in other directions. Here, an elliptical second emboss 4 extending in the second direction D2 is exemplified. More specifically, the second emboss 4 has an elliptical shape in which the major axis extends in the second direction D2 and the minor axis extends in the first direction D1.

[0034] Hereinafter, the dimension L1 in the first direction D1 of the first emboss 3 is also referred to as the "first length dimension L1", and the dimension L2 in the second direction D2 of the second emboss 4 is also referred to as the "second length dimension L2". Although the first emboss 3 and the second emboss 4 of the present embodiment have different directions in which the major axis and the minor axis extend as described above, their shapes and sizes are set to be equal. Therefore, the first length dimension L1 and the second length dimension L2 are set to be equal to each other. Also, the dimension W1 (width dimension) in the second direction D2 of the first emboss 3 and the dimension W2 (width dimension) in the second direction D2 of the second emboss 4 are also set to be equal to each other.

[0035] As shown in FIG. 5, the base material 11 of the present embodiment includes a first emboss row 30 in which the first embosses 3 are arranged with a first emboss interval E1 (first interval) in the first direction D1, and a second emboss row 40 in which the second embosses 4 are arranged with a second emboss interval E2 (second interval) in the second direction D2. Here, an example in which the first emboss interval E1 and the second emboss interval E2 are equal to each other (E1 = E2) is shown. In FIG. 5, the symbol of the first emboss row 30 is attached to the center line of the first emboss row 30 (the line overlapping the major axis of each first emboss 3), and the symbol of the second emboss row 40 is attached to the center line of the second emboss row 40 (the line overlapping the major axis of each second emboss 4).

[0036] A plurality of first emboss rows 30 are provided with a first row interval X1 (third interval) therebetween. That is, the first emboss rows 30 are arranged side by side with a first row interval X1 in a direction orthogonal to the first direction D1 in a plan view (the second direction D2 in the present embodiment). Similarly, a plurality of second emboss rows 40 are provided with a second row interval X2 (fourth interval) therebetween. That is, the second emboss rows 40 are arranged side by side with a second row interval X2 in a direction orthogonal to the second direction D2 in a plan view (the first direction D1 in the present embodiment). Here, an example in which the first row interval X1 and the second row interval X2 are equal to each other (X1 = X2) is shown.

[0037] The first embossment row 30 and the second embossment row 40 are adjusted in the above-described first embossment interval E1, second embossment interval E2, first row interval X1, and second row interval X2 so that the first embossment 3 and the second embossment 4 do not interfere with each other (do not overlap). Further, in the present embodiment, the first embossment 3 is arranged so as not to interfere with the second embossment row 40, and the second embossment 4 is arranged so as not to interfere with the first embossment row 30. More specifically, the first embossment 3 is separated from the center line of the second embossment row 40, and the second embossment 4 is separated from the center line of the first embossment row 30. Furthermore, the first embossment 3 and the second embossment 4 of the present embodiment are provided in a staggered pattern. More specifically, the first embossment 3 and the second embossment 4 are regularly (equally) arranged in alternating directions.

[0038] <Waist gather> FIG. 6 is a plan view seen from the skin side of the cover sheet 25, the elastic member 29a of the waist gather 29, and the tape 1 fixed to the cover sheet 25. In FIG. 6, the side sheet 23 and the back sheet 24 that are overlapped on the skin side of the cover sheet 25 are omitted.

[0039] As shown in FIG. 6, the waist gather 29 of the present embodiment is provided closer to the end 2d (upper side in FIG. 6) on the back side 2B side (one side in the longitudinal direction of the diaper body 20) than the tape 1. Further, the waist gather 29 is located inside the pair of tapes 1 in the width direction. Furthermore, the waist gather 29 overlaps with a virtual line M extending in the first direction D1 from at least one of the plurality of first embossment rows 30. When the waist gather 29 is pulled outward in the width direction, the elastic member 29a generates an elastic force F directed inward in the width direction, thereby pulling the surrounding members including the tape 1. The waist gather 29 of the present embodiment pulls the tape 1 in the direction inward in the width direction and toward the end 2d side (that is, the first direction D1) by the elastic force F.

[0040] <Cover sheet> The cover sheet 25 is provided with a plurality of holes 5 penetrating in the thickness direction. The holes 5 function to improve the air permeability and flexibility of the cover sheet 25 and to reduce the weight of the cover sheet 25. The holes 5 of the present embodiment are circular in plan view and have the same size as each other.

[0041] Here, an example is shown in which a hole row in which a plurality of holes 5 are arranged at regular intervals Y in the longitudinal direction is provided at regular intervals Z in the width direction. In each hole row, the longitudinal positions of the holes 5 are set to be equal to each other. Therefore, the holes 5 are positioned at regular intervals Z along the width direction. Note that the longitudinal interval Y of the holes 5 is set to be smaller than the widthwise interval Z (Y < Z). The holes 5 are scattered over the entire area of the cover sheet 25. Therefore, the holes 5 are provided in both the fixing portion 25a to which the base portion 1A of the tape 1 is fixed and the other portion 25b different from the fixing portion 25a of the cover sheet 25. Note that the other portion 25b is a portion of the cover sheet 25 other than the fixing portion 25a.

[0042] [2. Operation] With reference to FIGS. 7(a) and 7(b), the operation of the above-described tape 1 and the diaper 2 including the same will be described. Here, it is assumed that the diaper 2 is in a worn state, and the front and rear and left and right are defined with reference to the wearer of the diaper 2. The head side of the standing wearer is defined as the upper side, and the leg side is defined as the lower side. In the diaper 2 including the tape 1 in which the base portion 1A is fixed to the back body 2B as described above, the front body 2A and the back body 2B are connected to each other by the tape 1 when the tip portion 1B of the tape 1 is fastened to the front body 2A. The tape 1 in the worn state connecting the front body 2A and the back body 2B in this way is arranged on the left and right sides of the front side of the diaper 2, and the tip portion 1B is located inside the base portion 1A in the left-right direction.

[0043] As shown in Fig. 7(a), in the tape 1, the first embossed row 30 extends along a direction toward the inner side and the lower side in the left - right direction (that is, the first direction D1 is along the direction toward the inner side and the lower side in the left - right direction). Also, as shown in Fig. 7(b), in the tape 1 in the mounted state, the second embossed row 40 extends along a direction toward the outer side and the lower side in the left - right direction (that is, the second direction D2 is along the direction toward the outer side and the lower side in the left - right direction). Note that in Fig. 7(a), the second embossed row 40 is omitted, and in Fig. 7(b), the first embossed row 30 is omitted.

[0044] In the diaper 2, the front body portion 2A and the back body portion 2B may be relatively displaced according to the movement of the wearer. For example, when the wearer makes a movement of crawling on the stomach, as shown in Fig. 7(a), the front body portion 2A may be displaced downward with respect to the back body portion 2B. When the front body portion 2A is displaced downward in this way, in the tape 1, since the tip portion 1B is displaced downward with respect to the base portion 1A on the inner side in the left - right direction of the base portion 1A, a tensile force T1 in the first direction D1 acts on the tape 1. On the other hand, since the base material 11 of the tape 1 is provided with the above - mentioned first embossed row 30, the tensile strength in the first direction D1 is increased as compared with a tape to which a base material not provided with the first embossed row 30 is applied. Therefore, in the tape 1, the first embossed row 30 resists the tensile force T1 in the first direction D1, and thus damage due to the tensile force T1 is suppressed.

[0045] On the other hand, for example, when the wearer slides while lying on the back, as shown in Fig. 7(b), the back body portion 2B may be displaced downward (the front body portion 2A may be displaced upward with respect to the back body portion 2B) with respect to the front body portion 2A. When the back body portion 2B is displaced downward in this way, in the tape 1, since the base portion 1A is displaced downward with respect to the tip portion 1B on the outer side in the left - right direction of the tip portion 1B, a tensile force T2 in the second direction D2 acts on the tape 1. On the other hand, since the base material 11 of the tape 1 is provided with the second embossment row 40 described above, the tensile strength in the second direction D2 is increased as compared with a tape to which a base material not provided with the second embossment row 40 is applied. Therefore, in the tape 1, the second embossment row 40 counteracts the tensile force T2 in the second direction D2, thereby suppressing breakage due to the tensile force T2.

[0046] Also, as shown in FIG. 7(a), the waist gather 29 located above the tape 1 in the mounted state generates an elastic force F directed inward in the left-right direction by being pulled outward in the left-right direction. Due to the component force of this elastic force F, a tensile force T1 in the first direction D1 acts on the tape 1. On the other hand, as described above, the base material 11 of the tape 1 has its tensile strength in the first direction D1 increased by the first embossment row 30. For this reason, in the tape 1, the first embossment row 30 also counteracts the tensile force T1 in the first direction D1 due to the elastic force F of the waist gather 29, thereby suppressing breakage.

[0047] [3. Effects] (1) According to the base material 11 of the tape 1, since the first embossment row 30 composed of a plurality of first embossments 3 extending in the first direction D1 that is inclined with respect to both the longitudinal direction and the width direction of the diaper body 20 is provided, the tensile strength in the first direction D1 can be increased as described above. Thereby, even when a tensile force T1 in the first direction D1 is applied to the tape 1 due to the relative displacement between the front body part 2A and the back body part 2B as described above in the mounted state where the tip part 1B of the tape 1 is fixed to the front body part 2A, breakage of the tape 1 can be suppressed.

[0048] Note that while the first embossment 3 reinforces the base material 11, there is a risk of causing hardening of the base material 11. On the other hand, in the base material 11, since the first embossment 3 has a shape extending in the first direction D1 and is arranged at intervals in the first direction D1, bending of the base material 11 along a line in the first direction D1 can be guided (bendability can be enhanced). Therefore, it is possible to suppress a decrease in the tactile sensation of the base material 11 and to suppress a decrease in the followability of the tape 1 in the mounted state.

[0049] (2) As shown in Fig. 7(a), the first direction D1 along which, in the unfolded state, the front body 2A extends toward the outside in the width direction is the direction toward the inside and the lower side in the left - right direction of the wearer in the worn state. Therefore, according to the first emboss row 30 provided along the first direction D1, the tensile strength against the tensile force T1 applied when the front body 2A moves downward with respect to the back body 2B in the worn state can be increased. Thus, in the diaper 2 worn by a wearer who moves in a prone position (e.g., an infant or a young child doing the high - high movement), breakage of the tape 1 can be effectively suppressed.

[0050] (3) Since a second emboss row 40 composed of a plurality of second embosses 4 extending in a second direction D2 intersecting the first direction D1 is provided, the tensile strength in the second direction D2 is also increased as described above. By increasing the tensile strength in two different directions D1 and D2 in this way, breakage of the tape 1 can be further suppressed. Note that, similar to the first emboss 3 described above, the second emboss 4 may cause hardening of the base material 11 while reinforcing the base material 11. On the other hand, in the base material 11, since the second emboss 4 has a shape extending in the second direction D2 and is arranged at intervals in the second direction D2, bending of the base material 11 along a line in the second direction D2 can be guided. Therefore, a further decrease in the touch feeling of the base material 11 can be suppressed, and a further decrease in the followability of the tape 1 in the worn state can also be suppressed.

[0051] (4) Since the second direction D2 is inclined with respect to the width direction of the diaper body 20 and is inclined to the opposite side of the first direction D1 with respect to the longitudinal direction, as shown in Figs. 7(a) and 7(b), the tensile strength in both the direction toward the inside and the lower side in the left - right direction of the wearer and the direction toward the outside and the lower side in the left - right direction in the worn state can be increased. Thereby, even when the front body 2A and the back body 2B are relatively displaced in either the upward or downward direction in the worn state, the emboss rows 30 and 40 can counter the applied tensile forces T1 and T2. Therefore, breakage of the tape 1 can be further suppressed.

[0052] According to the second embossment row 40 provided along the second direction D2 that, in the unfolded state, runs along the inner side in the width direction and on the front body 2A side, the tensile strength against the tensile force T2 applied when the front body 2A moves upward with respect to the back body 2B in the worn state can be increased. Therefore, in the diaper 2 worn by a wearer who slides while lying on their back (for example, an adult or elderly person in the supine position, or an infant who repeatedly turns over from the supine position), breakage of the tape 1 can be effectively suppressed.

[0053] In addition, since the twisting (torsion) of the base material 11 is suppressed by providing both the first embossment row 30 and the second embossment row 40, the twisting of the fastening material 12 laminated on the base material 11 can also be suppressed. As a result, in the diaper 2 in the worn state, since the fastening material 12 is likely to be fastened to the patch sheet 26 over the entire surface (without twisting), the fastening force of the fastening material 12 to the patch sheet 26 can be more appropriately exerted. Therefore, unintended peeling of the tape 1 can be suppressed.

[0054] (5) Since the first embossment 3 and the second embossment 4 are provided in a staggered pattern, the tensile strength of the base material 11 can be increased in a well-balanced manner. As a result, stress concentration in the base material 11 is alleviated compared to an arrangement where the first embossment 3 and the second embossment 4 overlap or are offset from each other, so breakage of the tape 1 can be more effectively suppressed. Also, according to the staggered arrangement, it becomes easier to arrange the first embossment 3 and the second embossment 4 at a high density, so the strength of the base material 11 can be further increased.

[0055] (6) Since the first embossment 3 is separated from the center line of the second embossment row 40 and the second embossment 4 is separated from the center line of the first embossment row 30, it becomes easier to ensure the distance between the first embossment 3 and the second embossment 4. If the distance between the first embossment 3 and the second embossment 4 is ensured, stress concentration in the base material 11 is alleviated compared to a case where the first embossment 3 and the second embossment 4 are arranged close to each other (for example, overlapping), so breakage of the tape 1 can be more effectively suppressed. (7) According to the diaper 2 provided with the tape 1 and the diaper body 20, breakage of the tape 1 can be suppressed as described above.

[0056] (8) The diaper body 20 has a waist gather 29 that overlaps with an imaginary line M extending in the first direction D1 from the first embossment row 30 and is provided closer to the end 2d on the front body 2A side than the tape 1, and pulls the tape 1. For this reason, as shown in FIG. 7(a), in the diaper 2 in the worn state, when a tensile force T1 in the first direction D1 is applied to the tape 1 by the component force of the elastic force F of the waist gather 29, since the first embossment row 30 in the tape 1 resists the tensile force in the first direction D1 as described above, breakage of the tape 1 can be suppressed.

[0057] (9) The diaper body 20 has a plurality of holes 5 penetrating in the thickness direction and a cover sheet 25 to which the base 1A of the tape 1 is fixed. According to the cover sheet 25 provided with such a plurality of holes 5, improvement in breathability and weight reduction of the diaper 2 can be realized. In the present embodiment, since the holes 5 are scattered over the entire area of the cover sheet 25, further improvement in breathability and further weight reduction of the diaper 2 can be realized as compared with the case where the holes 5 are partially scattered.

[0058] On the other hand, the cover sheet 25 provided with the holes 5 is likely to have lower strength than the one without the holes 5, and in particular, the fixing portion 25a is likely to suffer from insufficient strength because it is strongly pulled. In contrast, since the tensile strength of the base material 11 in the first direction D1 is increased by the first embossment row 30 in the tape 1 fixed to the cover sheet 25 as described above, the fixing portion 25a of the cover sheet 25 to which the base 1A of the tape 1 is fixed can be reinforced by the base 1A. Therefore, the overall strength of the fixing portion 25a of the cover sheet 25 and the base 1A of the tape 1 can be ensured.

[0059] Also, according to the tape 1 having the base material 11 provided with the second embossment row 40 in addition to the first embossment row 30, the tensile strength in the second direction D2 as well as in the first direction D1 is increased. Therefore, the fixing portion 25a can be further reinforced by the base 1A as compared with the tape to which the base material not provided with the second embossment row 40 is applied. Therefore, the overall strength of the fixing portion 25a of the cover sheet 25 and the base 1A of the tape 1 can be more reliably ensured.

[0060] [3. Modification Example] [3-1. Hole Portion] Referring to FIGS. 8(a) and 8(b), the five hole portions according to the modification example will be described. Here, the hole portion 5 provided in the fixing portion 25a of the cover sheet 25 is also referred to as a first hole portion 5A, and the hole portion 5 provided in the other portion 25b of the cover sheet 25 is also referred to as a second hole portion 5B. In FIGS. 8(a) and 8(b), the same reference numerals are given to the elements that are the same as or corresponding to the elements described in the above embodiment, and the overlapping descriptions are omitted.

[0061] The hole portion 5 of the first modification example and the second modification example includes a first hole portion 5A and a second hole portion 5B. These first hole portions 5A and second hole portions 5B are both circular in plan view, but in the first modification example, the arrangement intervals Ya and Yb thereof are different from each other, and in the second modification example, the diameters da and db thereof are different from each other. As shown in FIG. 8(a), in the hole portion 5 of the first modification example, the first hole interval Ya between the first hole portions 5A arranged in the longitudinal direction of the diaper 2 is smaller than the second hole interval Yb between the second hole portions 5B arranged in the longitudinal direction of the diaper 2 (Ya < Yb). In the first modification example, the diameter da of the first hole portion 5A (hereinafter, also referred to as "first hole diameter da") and the diameter db of the second hole portion 5B (hereinafter, also referred to as "second hole diameter db") are set to be equal to each other (da = db).

[0062] As shown in FIG. 8(b), in the hole portion 5 of the second modification example, the first hole diameter da is set to be larger than the second hole diameter db (da > db). In the second modification example, the first hole interval Ya and the second hole interval Yb are set to be equal to each other (Ya = Yb). According to the first modification example in which the first hole interval Ya is smaller than the second hole interval Ya as described above, and the second modification example in which the first hole diameter da is larger than the second hole diameter db, the air permeability of the fixing portion 25a can be increased more than the air permeability of the other portion 25b. Thereby, in the cover sheet 25 to which the tape 1 is fixed, it becomes easier to ensure the air permeability of the fixing portion 25a.

[0063] On the other hand, the fixing portion 25a of the first and second modified examples has a larger area of the hole portion 5 per unit area than the other portion 25b, so the strength tends to be lower. In contrast, since the base portion 1B of the tape 1 with enhanced tensile strength as described above is fixed to the fixing portion 25a, the fixing portion 25a can be reinforced by the base portion 1B of the tape 1. Therefore, according to the hole portion 5 of the first and second modified examples, it is possible to achieve both ensuring air permeability and ensuring strength in the region where the base portion 1B and the fixing portion 25a overlap in plan view.

[0064] Note that the configuration of the first modified example and the configuration of the second modified example may be combined with each other. Specifically, the hole portion 5 may be set such that the first hole interval Ya is smaller than the second hole interval Yb (Ya < Yb), and the first hole diameter da is larger than the second hole diameter db (da > db). In this case, although it becomes easier to further ensure the air permeability of the fixing portion 25a in the cover sheet 25 to which the tape 1 is fixed, the strength of the fixing portion 25a tends to be further lower than the strength of the other portion 25b. In contrast, since the fixing portion 25a is reinforced by the base portion 1B of the tape 1 as described above, in this case, it is possible to suppress a decrease in strength while increasing the air permeability in the region where the base portion 1B and the fixing portion 25a overlap in plan view.

[0065] [3-2. Arrangement of Embossments] Referring to FIG. 9, a base material 11' provided with a first embossment row 30' and a second embossment row 40' according to a modified example will be described. The first embossment row 30' and the second embossment row 40' of this modified example have different arrangements of the first embossment 3 and the second embossment 4 from the first embossment row 30 and the second embossment row 40 described in the above embodiment. In FIG. 9, the same reference numerals are given to the same or corresponding elements as those described in the above embodiment, and redundant descriptions are omitted. Note that in FIG. 9, similar to FIG. 5, the symbol of the first embossment row 30' is attached to the center line (the line overlapping the major axis of each first embossment 3) of the first embossment row 30', and the symbol of the second embossment row 40' is attached to the center line (the line overlapping the major axis of each second embossment 4) of the second embossment row 40'.

[0066] As shown in FIG. 9, in this modification, the first emboss 3 is disposed on the second emboss row 40', and the second emboss 4 is disposed on the first emboss row 30'. More specifically, the first emboss 3 overlaps the center line of the second emboss row 40', and the second emboss 4 overlaps the center line of the first emboss row 30'. As a result, in the second emboss row 40', the first emboss 3 is disposed between adjacent second embosses 4, and in the first emboss row 30', the second emboss 4 is disposed between adjacent first embosses 3. Therefore, in each of the first emboss row 30' and the second emboss row 40' of this modification, the first emboss 3 and the second emboss 4 are alternately arranged.

[0067] Note that also in this modification, the first row interval X1' (third interval) between the first emboss rows 30' is equal to the second row interval X2' (fourth interval) between the second emboss rows 40' (X1' = X2'), and the first emboss interval E1 and the second emboss interval E2 are also equal to each other (E1 = E2). Also in this modification, the first emboss 3 and the second emboss 4 are provided in a staggered manner and do not interfere with each other (do not overlap).

[0068] According to the base material 11' of this modification, since the first emboss 3 overlaps the center line of the second emboss row 40' and the second emboss 4 overlaps the center line of the first emboss row 30', it becomes easy to arrange the first emboss 3 and the second emboss 4 in a well-balanced and high density manner. Thereby, while relaxing the stress concentration in the base material 11', the tensile strength of the base material 11' can be effectively increased. Therefore, breakage of the tape can be further suppressed. In addition, according to the base material 11' of this modification, the same operational effects can be obtained from the same configuration as in the above-described embodiment.

[0069] [3-3. Others] The above first direction D1 and second direction D2 are examples. The first direction D1 only needs to be inclined with respect to both the longitudinal direction and the width direction of the diaper body 20, and the inclination angle with respect to the longitudinal direction may be other than 45°. Further, as long as the inclination angle of the first direction D1 is different from that of the second direction D2, similar to the second direction D2, it may be a direction along the direction toward the front body 2A side and the inner side in the width direction. That is, the first direction D1 and the second direction D2 may be inclined on the same side with respect to the longitudinal direction. Note that the second direction D2 only needs to intersect the first direction D1, and may be a direction along the longitudinal direction or the width direction (parallel to the longitudinal direction or the width direction).

[0070] The shapes and arrangements of the above first emboss 3 and second emboss 4 are also examples. The shapes of the first emboss 3 and the second emboss 4 may be linear or rectangular. Further, the first emboss 3 and the second emboss 4 may have different shapes from each other. The first emboss interval E1 and the second emboss interval E2 may be different from each other. Instead of (or in addition to) this, the first length dimension L1 and the second length dimension L2 may be different from each other.

[0071] Thus, according to the configuration in which the emboss intervals E1 and E2 are different from each other and / or the length dimensions L1 and L2 are different from each other, the region of the first emboss 3 per unit length in the first direction D1 and the region of the second emboss 4 per unit length in the second direction D2 can be made different. Thereby, the tensile strength in the first direction D1 and the tensile strength in the second direction D2 can be made different from each other, so that one of the tensile strength in the first direction D1 and the tensile strength in the second direction D2 can be increased as necessary compared to the other. That is, the tensile strength can be set individually for each of the first direction D1 and the second direction D2. Also, the bendability along the line in the first direction D1 and the bendability along the line in the second direction D2 can be set individually.

[0072] For example, by setting the first embossing interval E1 to be smaller than the second embossing interval E2 (E1 < E2), the tensile strength in the first direction D1 can be made higher than the tensile strength in the second direction D2, and the bendability along the line in the first direction D1 can be made higher than the bendability along the line in the second direction D2. Also, similarly, by setting the first length dimension L1 to be larger than the second length dimension L2 (L1 > L2), the tensile strength in the first direction D1 can be made higher than the tensile strength in the second direction D2, and the bendability along the line in the first direction D1 can be made higher than the bendability along the line in the second direction D2.

[0073] When the tape with the tensile strength in the first direction D1 relatively increased in this way is applied to the diaper 2 above, as shown in FIG. 7(a), the resistance force can be increased against the tensile force T1 when the front body 2A is displaced downward with respect to the back body 2B. Therefore, in the diaper 2 targeted at wearers who move more prone to crawling on their stomachs than slipping on their backs, breakage of the tape can be effectively suppressed.

[0074] Also, by setting the second embossing interval E2 to be smaller than the first embossing interval E1 (E2 < E1), or by setting the second length dimension L2 to be larger than the first length dimension L1 (L2 > L1), the tensile strength can be made higher in the second direction D2 than in the first direction D1, and the bendability along the line in the second direction D2 can be made higher than the bendability along the line in the first direction D1.

[0075] When the tape with the tensile strength in the second direction D2 relatively increased in this way is applied to the diaper 2 above, as shown in FIG. 7(b), the resistance force can be increased against the tensile force T2 when the front body 2A is displaced upward with respect to the back body 2B (when the back body 2B is displaced downward with respect to the front body 2AB). Therefore, in the diaper 2 targeted at wearers who slip on their backs more often than crawl on their stomachs, breakage of the tape can be effectively suppressed.

[0076] Note that the first emboss 3 and the second emboss 4 do not have to be provided in a staggered pattern. For example, they may be provided overlapping each other, or may have an irregular arrangement. The arrangement of the above-described first embossment row 30 and second embossment row 40 is also an example. The first row interval X1 and the second row interval X2 may be different from each other. In other words, a plurality of second embossment rows 40 may be provided with a second row interval X2 different from the first row interval X1 therebetween.

[0077] According to an arrangement in which the first row interval X1 and the second row interval X2 are different, the area of the first embossment 3 and the area of the second embossment 4 per unit area in the base material of the tape can be made different from each other. Thereby, similar to the case of making the embossment intervals E1, E2 and the length dimensions L1, L2 different, since the tensile strength in the first direction D1 and the tensile strength in the second direction D2 can be made different from each other, among the tensile strength in the first direction D1 and the tensile strength in the second direction D2, one can be increased as necessary compared to the other. Also, as described above, among the bendability along the line in the first direction D1 and the bendability along the line in the second direction D2, one can be increased as necessary compared to the other.

[0078] The second embossment row 40 may be omitted. Even in a base material in which the second embossment row 40 is omitted, since the tensile strength in the first direction D1 is increased by the first embossment row 30 as described above, breakage of the tape can be suppressed. In addition, in a tape having a base material in which the second embossment row 40 is omitted, if the first direction is along the direction going toward the front body 2A side and the outer side in the width direction in the same manner as in the above-described embodiment, the first embossment row 30 can counter the tensile force T1 when the front body 2A is displaced downward with respect to the back body 2B. Therefore, it can be specialized for suppressing breakage when the wearer crawls on the tape in a prone position.

[0079] On the other hand, in a tape having a base material in which the second embossment row 40 is omitted, if the first direction is along the direction going toward the front body 2A side and the inner side in the width direction in the same manner as the second direction D2 in the above-described embodiment, the first embossment row 30 can counter the tensile force T2 when the front body 2A is displaced upward with respect to the back body 2B. Therefore, it can be specialized for suppressing breakage when the wearer slides while lying on the back.

[0080] The tape may be provided at the front body portion 2A. Specifically, the base portion 1A of the tape may be fixed to the front body portion 2A, and the tip portion 1B may be fixed to the back body portion 2B. In this case, the patch sheet 26 is attached to the back body portion 2B, and when the diaper is worn, the tip portion 1B of the tape may be fixed to the back body portion 2B. Even with the tape having the base portion 1A fixed to the front body portion 2A in this way, the first embossing row 30 along the first direction that is inclined in both the longitudinal direction and the width direction of the diaper body 20 is provided on the base material, so that the tensile strength in the first direction is increased. Therefore, even if a tensile force in the first direction is applied to the tape due to the relative displacement between the front body portion 2A and the back body portion 2B, breakage of the tape can be suppressed as in the above-described embodiment.

[0081] The configuration and arrangement of the above-described waist gather 29 are examples. The waist gather 29 may be arranged at the front body portion 2A rather than the tape 1, or may not overlap the virtual line M described above. The shape, size, and arrangement of the hole portion 5 provided in the above-described cover sheet 25 are also examples. The hole portion 5 may be elliptical in plan view. Also, the hole portion 5 does not have to be provided as a plurality of hole rows as described above, and may be, for example, randomly arranged. Further, the hole portion 5 may be provided in the sheet material to which the base portion 1A of the tape 1 is fixed, and may be provided in, for example, the side sheet 23 described above. Note that the waist gather 29 and the hole portion 5 may be omitted from the diaper body 20.

Explanation of Reference Numerals

[0082] 1 Tape (fastening tape) 1A Base portion 1B Tip portion 2 Diaper 2A Front body portion 2B Back body portion 2C Crotch portion 2d End portion 3 First embossing 4 Second embossing 5 Hole portion 5A First hole portion 5B Second hole portion 11 Base material (tape base material) 12 Adhesive material 13 Sheet layer 14 Sheet layer 20 Diaper body 21 Absorbent body 22 Center sheet 23 Side sheet 24 Back sheet 25 Cover sheet (sheet material) 25a Fixing part 25b Other part 26 Patch sheet 27 Three-dimensional gather 28 Leg gather 29 Waist gather 29a Elastic member 30, 30′ First embossing row 40, 40′ Second embossing row D1 First direction D2 Second direction da First hole diameter (diameter of the first hole 5A) db Second hole diameter (diameter of the second hole 5B) E1 First embossing interval (first interval) E2 Second embossing interval (second interval) F Elastic force L1 First length dimension (dimension of the first embossing 3 in the first direction D1) L2 Second length dimension (dimension of the second embossing 4 in the second direction D2) M Virtual line T1 Tensile force in the first direction D1 T2 Tensile force in the second direction D2 W1 Dimension of the first embossing 3 in the second direction D2 W2 Dimension of the second embossing 4 in the first direction D1 X1, X1′ First row interval (third interval) X2, X2′ Second row interval (fourth interval) Y Interval in the longitudinal direction of the hole part 5 Ya First hole interval (interval between the first hole parts 5A) Yb Second hole interval (interval between the second hole parts 5B) Z Interval in the width direction of the hole part 5

Claims

1. In a fastening tape provided with a fastening material that is fastened to the other side in the longitudinal direction of the diaper body at a tip portion extending outward in the width direction of the diaper body from a base portion fixed to one side in the longitudinal direction of the diaper body, a plurality of first embossments having a shape extending in a first direction that forms a base portion and the tip portion, is arranged along the longitudinal direction and the width direction, and is inclined with respect to both the longitudinal direction and the width direction are arranged at a first interval in the first direction, and the fastening tape has a sheet-like tape base material provided with a first embossment row, including the diaper body, the diaper body has a sheet material provided with a plurality of holes penetrating in the thickness direction and to which the base portion is fixed, the holes include a first hole provided in a fixing portion of the sheet material to which the base portion is fixed, and a second hole provided in another portion of the sheet material different from the fixing portion, wherein the interval between the first holes is smaller than the interval between the second holes, and / or the diameter of the first hole is larger than the diameter of the second hole characterized in that it is a diaper.

2. The first direction is a direction along a direction going toward the other side and the inner side in the width direction characterized in that it is the diaper according to Claim 1.

3. The first direction is a direction along a direction going toward the other side and the outer side in the width direction characterized in that it is the diaper according to Claim 1.

4. including a second embossment row in which a plurality of second embossments having a shape extending in a second direction intersecting the first direction are arranged at a second interval in the second direction characterized in that it is the diaper according to any one of Claims 1 to 3.

5. The second direction is inclined with respect to the width direction and is inclined on the opposite side to the first direction with respect to the longitudinal direction characterized in that it is the diaper according to Claim 4.

6. The first embossment and the second embossment are provided in a staggered pattern characterized in that it is the diaper according to Claim 5.

7. A plurality of the first embossment rows are provided with a third interval therebetween, and a plurality of the second embossment rows are provided with a fourth interval different from the third interval therebetween characterized in that it is the diaper according to any one of Claims 4 to 6.

8. The first interval and the second interval are different from each other, and / or the dimension of the first embossment in the first direction and the dimension of the second embossment in the second direction are different from each other The diaper according to any one of claims 4 to 7, characterized in that...

9. The first embossment is spaced apart from the center line of the second embossment row, The second embossment is spaced apart from the center line of the first embossment row The diaper according to any one of claims 4 to 8, characterized in that...

10. The first embossment overlaps the center line of the second embossment row, The second embossment overlaps the center line of the first embossment row The diaper according to any one of claims 4 to 9, characterized in that...

11. Comprising a plurality of sheet layers that are stacked in the thickness direction of the diaper body and fixed to each other by the first embossment The diaper according to any one of claims 1 to 10, characterized in that...

12. The diaper body has a waist gather that overlaps a virtual line extending in the first direction from the first embossment row and is provided closer to the end on one side than the fastening tape to pull the fastening tape The diaper according to any one of claims 1 to 11, characterized in that...

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