Absorbent pad for disposable diaper or disposable diaper

Abstract

The absorbent pad for a disposable diaper or the disposable diaper has a liquid-absorbing absorbent core (11a) having a longitudinal direction, a lateral direction, and a thickness direction that intersect each other, and is characterized in that: the absorbent core (11a) is provided with a liquid-absorbing layer (11b) in an expanded state and an extended state; the absorbent core (11a) is provided with a pair of compressed sections (E) in the longitudinal direction in the crotch section when worn, and the pair of compressed sections (E) has bent sections (F) that are bent outward in the transverse direction.

Description

Technical Field

[0001] The present invention relates to an absorbent pad for a disposable diaper or a disposable diaper. Background Art

[0002] Conventionally, there is known a disposable diaper as described in Patent Document 1, in which linear embossing is formed on an absorbent body to suppress lateral leakage of excrement.

[0003] Prior Art Literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-140068 Summary of the invention

[0006] Problems to be solved by the invention

[0007] In the absorbent body with linear compression grooves, as in the embossing of the diaper of Patent Document 1, corners (sharp parts) are easily formed due to deformation of the absorbent body when worn, and there is a possibility that the corners abut against the wearer's skin and cause discomfort to the wearer. In addition, the embossing is also formed to prevent the absorbent body from deforming, and the linear embossing has little effect. If the formation area of ​​the linear embossing is increased to prevent the absorbent body from deforming, the absorbent body will become hard, and there is a possibility that the wearer's skin touch will be damaged.

[0008] The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide an absorbent pad for a disposable diaper or a disposable diaper which reduces the displacement of an absorbent body and improves the touch to the skin when worn.

[0009] Solutions to Solve Problems

[0010] The main invention for achieving the above-mentioned purpose is an absorbent pad or disposable diaper for disposable diapers, which has longitudinal, lateral and thickness directions that intersect each other and has a liquid-absorbing absorbent core, characterized in that in an expanded and stretched state, the above-mentioned absorbent core has a pair of compression parts along the above-mentioned longitudinal direction in the crotch portion when worn, and the pair of the above-mentioned compression parts respectively have a bending part that bends toward the outside of the above-mentioned lateral direction.

[0011] Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[0012] Effects of the Invention

[0013] According to the present invention, the shape displacement of the absorbent pad for a disposable diaper or the absorbent body of the disposable diaper can be reduced, and the touch to the skin when the diaper is worn can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic perspective view of the diaper 1.

[0015] Figure 2 This is a plan view of the diaper 1 in the unfolded and stretched state as viewed from the skin side.

[0016] Figure 3 yes Figure 2 A schematic cross-sectional view taken along the A-A line.

[0017] Figure 4 It is a top view of the absorbent body 10.

[0018] Figure 5A yes Figure 4 A schematic cross-sectional view as viewed in the X-X direction. Figure 5B yes Figure 4 A schematic cross-sectional view in the Y-Y direction. Figure 5C yes Figure 4 A schematic cross-sectional view in the Z-Z direction.

[0019] Figure 6 It is a top view of the absorbent body 11.

[0020] Figure 7A to Figure 7C It is a figure which shows the absorber 11 of a comparative example. DETAILED DESCRIPTION

[0021] At least the following matters will be made clear from the description of this specification and the accompanying drawings.

[0022] Mode 1 is an absorbent pad or disposable diaper for disposable diapers, which has longitudinal, lateral and thickness directions that intersect each other and has a liquid-absorbing absorbent core, characterized in that in an expanded and stretched state, the above-mentioned absorbent core has a pair of compression parts along the above-mentioned longitudinal direction in the crotch portion when worn, and the pair of the above-mentioned compression parts respectively have a bending part that bends toward the outside of the above-mentioned lateral direction.

[0023] According to method 1, by maintaining the softness of the portion of the absorbent core surrounded by the curved portion of a pair of compression portions and increasing the rigidity of the absorbent core by a pair of compression portions, it is easy to maintain the shape of the portion of the absorbent core that initially absorbs excrement when worn. By providing the compression portion with a curved portion, the possibility of the rigidity of the lateral outer side of the absorbent core becoming excessively high can be reduced, thereby improving the touch relative to the wearer's skin when worn.

[0024] Aspect 2 is the absorbent pad for disposable diapers or the disposable diaper according to aspect 1, wherein the pair of compression parts are provided on the ventral side of the disposable diaper or the absorbent pad for disposable diapers relative to the longitudinal center.

[0025] According to the second aspect, since the compression portion is a highly rigid portion, the possibility of causing discomfort to the wearer due to the compression portion contacting the buttocks when the wearer is in a sitting or lying position can be reduced.

[0026] A third aspect is the absorbent pad for disposable diapers or the disposable diaper according to the second aspect, wherein the pair of the compressed portions are provided in at least a portion of a region of the absorbent core corresponding to a urination opening when the wearer wears the absorbent core in the longitudinal direction.

[0027] According to aspect 3, by providing the absorbent core in the longitudinal direction in the urination opening corresponding region that absorbs urine, the shape of the absorbent core formed by absorbing urine can be easily maintained.

[0028] Mode 4 is an absorbent pad or disposable diaper for disposable diapers as described in any one of Modes 1 to 3, wherein the pair of compression portions comprises: a one side compression portion disposed at a position closer to one side than the above-mentioned lateral center of the above-mentioned absorbent core; and the other side compression portion disposed at a position closer to the other side than the above-mentioned lateral center of the above-mentioned absorbent core, the one side compression portion comprises a first bending portion and a second bending portion, and the lateral outermost end portion of the above-mentioned first bending portion is disposed at a position closer to the ventral side than the lateral outermost end portion of the above-mentioned second bending portion.

[0029] According to method 4, since the touch relative to the wearer's skin when worn can be improved by the curved portion of the compression portion, and the rigidity of the longitudinal portion between the transverse outermost ends of the first curved portion and the second curved portion located at different positions in the longitudinal direction of the compression portion can be improved, the rigidity of the absorbent core can be improved and the shape of the absorbent core can be easily maintained.

[0030] A fifth aspect is the absorbent pad for disposable diapers or the disposable diaper according to the fourth aspect, wherein the first curved portion and the second curved portion constitute at least a part of the one-side compressed portion, and the one-side compressed portion is continuous in the longitudinal direction.

[0031] According to method 5, by making the one side compression portion having the first bending portion and the second bending portion as a part thereof continuous in the longitudinal direction, the area overlapping with the one side compression portion in the longitudinal direction of the absorbent core can reduce the possibility of bending along the lateral direction and the possibility of breaking the absorbent core.

[0032] Mode 6 is an absorbent pad or disposable diaper for disposable diapers as described in any one of Modes 1 to 5, wherein the pair of compression portions comprises: a one side compression portion located at a position closer to one side than the center of the absorbent core in the lateral direction; and an other side compression portion located at a position closer to the other side than the center of the absorbent core in the lateral direction, and the lateral length from the end of the other side of the one side compression portion to the end of the one side of the other side compression portion is greater than the lateral length from the end of the one side of the one side compression portion to the end of the other side.

[0033] According to method 6, compared with the case where the lateral length from the end of the other side of the one side compression portion to the end of one side of the other side compression portion is smaller than the lateral length of the one side compression portion, the area between the one side compression portion and the other side compression portion can be used as a buffer area relative to the force of the absorbent core, thereby facilitating the absorbent core to be deformed softly and improving the skin feel when worn.

[0034] Mode 7 is an absorbent pad or disposable diaper for disposable diapers as described in any one of Modes 1 to 6, wherein the pair of compression portions comprises: a one side compression portion located at a position closer to one side than the center of the absorbent core in the lateral direction; and the other side compression portion located at a position closer to the other side than the center of the absorbent core in the lateral direction, and the lateral length from the end of the other side of the one side compression portion to the end of the one side of the other side compression portion is greater than the lateral length from the side end of the one side at the narrowest portion where the lateral length of the absorbent core is the shortest to the end of the one side of the one side compression portion.

[0035] According to method 7, compared with the case where the lateral length of the end of the other side of the one side compression portion and the end of one side of the other side compression portion is shorter than the lateral length from the side end of one side at the narrowest portion to the end of one side of the one side compression portion, the one side compression portion can be arranged on the lateral outer side (one side) of the absorbent core, thereby reducing the possibility of the shape of the absorbent core being deformed from the lateral outer side.

[0036] Mode 8 is an absorbent pad or disposable diaper for disposable diapers as described in any one of Modes 1 to 7, wherein the pair of compression portions comprises: a one side compression portion located at a position closer to one side than the above-mentioned lateral center of the above-mentioned absorbent core; and an other side compression portion located at a position closer to the other side than the above-mentioned lateral center of the above-mentioned absorbent core, and the above-mentioned longitudinal length of the above-mentioned one side compression portion from the end of the ventral side to the end of the dorsal side is greater than the above-mentioned lateral length from the end of the above-mentioned one side compression portion to the end of the above-mentioned other side.

[0037] According to method 8, compared with the case where the longitudinal length of the one side compression portion from the end of the ventral side to the end of the dorsal side is shorter than the lateral length of the one side compression portion from the end of one side to the end of the other side, the one side compression portion can be configured to be long in the longitudinal direction, thereby making it easy to maintain the shape within a large longitudinal range of the absorbent core.

[0038] Mode 9 is an absorbent pad or disposable diaper for disposable diapers as described in any one of Modes 1 to 8, wherein the disposable diaper is a disposable diaper having a pair of waist portions, and when viewed in the thickness direction, in the area where the waist portion and the absorbent core overlap, the area of ​​the non-overlapping portion of the waist portion and the pair of compression portions is larger than the area of ​​the overlapping portion of the waist portion and the pair of compression portions.

[0039] According to aspect 9, the pair of compression parts can reduce the possibility that the waistline part causes discomfort to the wearer's skin.

[0040] Method 10 is an absorbent pad or disposable diaper for a disposable diaper as described in any one of methods 1 to 9, wherein the disposable diaper is a disposable diaper having a pair of waist portions, the waist portions have waist elastic components that can be stretched and retracted in the above-mentioned transverse direction, and when viewed in the above-mentioned thickness direction, the pair of the above-mentioned compression portions have a portion that does not overlap with the above-mentioned waist elastic components.

[0041] According to aspect 10, the highly rigid compressed portion is pressed against the wearer's skin by the contraction force of the waist elastic member, and the possibility of deterioration of the skin feel can be reduced.

[0042] Mode 11 is an absorbent pad or disposable diaper for disposable diapers as described in any one of Modes 1 to 10, wherein the pair of compression portions comprises: a one side compression portion located on one side of the center of the absorbent core in the lateral direction; and the other side compression portion located on the other side of the center of the absorbent core in the lateral direction, and the one side compression portion comprises: an inner compression portion; and an outer compression portion located on the outer side of the inner compression portion in the lateral direction.

[0043] According to aspect 11, since the rigidity of the absorbent core in the lateral direction can be improved, it is easy to maintain the shape of the absorbent core.

[0044] Mode 12 is an absorbent pad for disposable diapers or a disposable diaper as described in Mode 11, wherein the maximum value of the lateral distance between the inner compression portion and the outer compression portion is smaller than the lateral length of the inner compression portion from the end of one side to the end of the other side.

[0045] According to method 12, compared with the case where the maximum value of the lateral distance between the inner compression portion and the outer compression portion is greater than the lateral length of the inner compression portion from the end of the other side to the end of one side, the rigidity of the area between the inner compression portion and the outer compression portion in the lateral direction can be improved, thereby improving the rigidity of one side of the absorbent core and making it easier to maintain the shape of one side of the absorbent core.

[0046] Mode 13 is an absorbent pad for disposable diapers or a disposable diaper as described in any one of Modes 1 to 12, wherein the length of the absorbent core in the compression portion in the thickness direction is greater than 15% and less than 40% of the length of the absorbent core in the thickness direction at the central portion in the lateral direction.

[0047] According to method 13, compared with the case where the length of the absorbent core at a pair of compression parts in the thickness direction is less than 15% of the length of the central part of the absorbent core in the transverse direction, the possibility of the compression part becoming excessively hard and causing discomfort to the wearer's skin can be reduced, and compared with the case where the length of the absorbent core at a pair of compression parts in the thickness direction is greater than 40% of the length of the central part of the absorbent core in the transverse direction, the rigidity of the absorbent core can be improved and the deformation of the absorbent core can be reduced.

[0048] Mode 14 is an absorbent pad or disposable diaper for disposable diapers as described in any one of Modes 1 to 13, wherein the absorbent pad or disposable diaper for disposable diapers has an absorbent body having the absorbent core, the absorbent body has a pair of leak-proof wall portions at both ends in the transverse direction, the pair of leak-proof wall portions have leak-proof wall elastic components along the longitudinal direction, the leak-proof wall portions respectively have: a skin-side leak-proof wall portion located closest to the skin side; and a non-skin-side leak-proof wall portion located closer to the non-skin side than the skin-side leak-proof wall portion, the inner end of the leak-proof wall portion in the transverse direction has a first fixing portion for joining and fixing the skin-side leak-proof wall portion facing each other and at least a portion of the non-skin-side leak-proof wall portion, and in the longitudinal direction, the pair of compression portions have a portion overlapping with the first fixing portion.

[0049] According to method 14, when the portion where the first fixing portion is provided is a portion that easily allows the leakage-proof wall portion to come into contact with the wearer's skin, even if the leakage-proof wall portion comes into contact with the wearer's skin during wearing and applies force to the absorbent core, the shape of the absorbent core can be easily maintained due to the rigidity of the compression portion.

[0050] Mode 15 is an absorbent pad or disposable diaper for disposable diapers as described in any one of Modes 1 to 14, wherein the absorbent pad or disposable diaper for disposable diapers has an absorbent body having the absorbent core and skin side sheets, the absorbent body has a pair of leak-proof wall portions at both ends in the transverse direction, the pair of leak-proof wall portions have leak-proof wall elastic components along the longitudinal direction, and a second fixing portion is provided for joining and fixing the non-skin sides of the leak-proof wall portions facing each other to at least a portion of the skin sides of the skin side sheets, and in the longitudinal direction, the pair of compression portions have a portion overlapping with the second fixing portion.

[0051] According to method 15, when the portion where the second fixing portion is provided is a portion that easily allows the leakage-proof wall portion to come into contact with the wearer's skin, even if the leakage-proof wall portion comes into contact with the wearer's skin during wearing and applies force to the absorbent core, the shape of the absorbent core can be easily maintained due to the rigidity of the compression portion.

[0052] Mode 16 is an absorbent pad or disposable diaper for disposable diapers as described in any one of Modes 1 to 14, characterized in that the absorbent pad or disposable diaper for disposable diapers has an absorbent body having the absorbent core, and the absorbent body has leak-proof wall portions at both ends in the transverse direction, the leak-proof wall portions have leak-proof wall elastic components along the longitudinal direction, and a pair of compression portions are provided at a position closer to the inside than the leak-proof wall portions in the transverse direction.

[0053] According to method 16, by providing a compression portion on the absorbent core, the deformation of the absorbent core can be reduced, making it easier to absorb excrement, and by not providing the compression portion on the portion that bulges toward the skin side as the leakage-proof wall portion, the wearer's skin can be less likely to feel discomfort due to the rigidity of the compression portion when wearing the absorbent core.

[0054] ===Present Implementation Method===

[0055] As the absorbent pad or disposable diaper for disposable diapers involved in the present invention, a panty-type disposable diaper 1 for adults (hereinafter also referred to as "diaper 1") is cited as an example for explanation. However, the absorbent pad or disposable diaper for disposable diapers involved in the present invention also includes an absorbent pad or a panty-type sanitary napkin used together with a disposable diaper. In addition, the wearer of the absorbent pad or disposable diaper for disposable diapers is not limited to an adult, but may also be a living creature such as an infant or an animal. In addition, the absorbent pad or disposable diaper for disposable diapers of the present invention does not include a sanitary napkin for physiological use.

[0056] <Structure of Diaper 1>

[0057] Figure 1 It is a schematic perspective view of the diaper 1. Figure 2This is a plan view of the diaper 1 in the unfolded and stretched state as viewed from the skin side. Figure 3 yes Figure 2 A schematic cross-sectional view taken along the A-A line of the figure. In addition, the so-called "expanded state" refers to the following state: the side joints 20 of the side parts of the panty-type diaper 1, which are the joints of the side parts (side ends) 30sw of the ventral waistline 30 and the side parts (side ends) 40sw of the dorsal waistline 40, are separated and opened, respectively, and the diaper 1 is unfolded in a plane as a whole. The so-called "stretched state" refers to the following state: the elastic components of the diaper 1 are stretched to the extent that the wrinkles of the diaper 1 cannot be seen. Specifically, it is a state in which the dimensions of each component constituting the diaper 1 (such as the ventral waistline 30 described later, etc.) are stretched to the same or close to the dimensions of the component itself.

[0058] Figure 2 The C-C line in the diagram is the horizontal center line (also called the "lateral center C-C"), and the CL line is the vertical center line (also called the "longitudinal center CL").

[0059] The diaper 1 in a pant-type state has mutually intersecting up-down directions, lateral directions, and front-to-back directions, and has a waist opening BH and a pair of leg openings LH, LH. The upper side in the up-down direction corresponds to the waist opening BH side, and the lower side corresponds to the crotch side. The front side in the front-to-back direction corresponds to the ventral side of the wearer, and the back side corresponds to the back side of the wearer. The lateral direction is the direction along the expansion and contraction direction of the ventral waist elastic components 35, 45 of the ventral waist portion 30 and the dorsal waist portion 40. The longitudinal direction of the diaper 1 in the unfolded and stretched state is equivalent to the length direction of the absorbent body 10, and is the direction along the up-down direction of the diaper 1 in the pant-type state. In addition, as Figure 3 As shown in FIG. 1 and FIG. 2 , the direction in which the materials constituting the diaper 1 are stacked is referred to as the thickness direction. In the thickness direction, the side in contact with the wearer's skin is referred to as the skin side, and the opposite side is referred to as the non-skin side.

[0060] The diaper 1 is a so-called three-component type pant-type diaper having a liquid-absorbent main body 10, an abdominal waistline portion 30 covering the abdominal part of the wearer, and a back waistline portion 40 covering the back part of the wearer.

[0061] like Figure 2As shown in the figure, in the unfolded and stretched state, the ventral waistline 30 and the dorsal waistline 40 are arranged parallel to each other with a gap in the longitudinal direction, and the absorbent body 10 is laid between them, and the ends 10ea and 10eb in the longitudinal direction of the absorbent body 10 are respectively joined and fixed to the skin side of the waistline 30 and 40 closest to each other, and the appearance shape presents a roughly H shape when viewed from above. And from this state, the center position (center line) CL in the longitudinal direction of the absorbent body 10 is folded in half as the folding position. That is, the lower end of the diaper 1 in the underpants-type state in the vertical direction corresponds to the center CL of the diaper 1 in the unfolded and stretched state. In this folded state, the ventral waistline 30 and the dorsal waistline 40 facing each other are joined and connected to each other at the side parts 30sw and the side parts 40sw on both sides in the transverse direction to form a pair of side joints 20, 20. That is, the ventral waistline portion 30 and the dorsal waistline portion 40 are formed into a ring shape by a pair of side joint portions 20, 20. Figure 1 The diaper 1 is in a pull-on state with a waist opening BH and a pair of leg openings LH, LH formed as shown. The side joints 20 are formed by known joining means such as welding or bonding.

[0062] (Abdominal waist circumference 30)

[0063] The ventral waistline portion 30 is disposed on the non-skin side of the absorbent body 10. Figure 3 As shown in the figure, the ventral waistline portion 30 has: a skin side sheet 31 disposed at a position closest to the skin side in the thickness direction; a non-skin side sheet 32 ​​stacked in a manner adjacent to the non-skin side of the skin side sheet 31; and a ventral waistline elastic member 35 provided between the skin side sheet 31 and the non-skin side sheet 32. The ventral waistline portion 30 is basically a two-layer structure of the skin side sheet 31 and the non-skin side sheet 32, but may also have a structure of more than three layers, such as a skin top sheet 36 (described later).

[0064] The skin side sheet 31 is a rectangular sheet member when viewed from above, and is formed of, for example, SMS nonwoven fabric. The non-skin side sheet 32 ​​is a rectangular sheet member formed of nonwoven fabric when viewed from above, and is formed of, for example, SMS nonwoven fabric. The skin side sheet 31 and the non-skin side sheet 32 ​​can be of any size and shape. In addition, the upper end or the lower end of the non-skin side sheet 32 ​​can also have a folded portion folded back from the non-skin side to the skin side and from the front side to the back side in the longitudinal direction.

[0065] The ventral waist elastic member 35 is a stretchable member that can be stretched in the horizontal direction and is arranged along the horizontal direction. In the present embodiment, a plurality of rubber threads are used. The ventral waist elastic member 35 is arranged in a plurality of positions in the vertical direction (vertical direction) between the skin side sheet 31 and the non-skin side sheet 32, and is installed by using adhesives such as hot melt adhesives in a state of being stretched in the horizontal direction. The ventral waist portion 30 matches the ventral waist of the wearer due to the stretchability of the ventral waist elastic member 35. In addition, the diaper 1 of the present embodiment uses rubber threads as the ventral waist elastic member 35 in the ventral waist portion 30, but a stretchable member such as a stretch sheet can also be configured to stretch the ventral waist portion 30 in the horizontal direction.

[0066] In addition, the ventral waistline portion 30 has a skin surface sheet 36. The skin surface sheet 36 is as shown in FIG. Figure 3 As shown, the sheet member is arranged in a manner to cover the upper end of the absorbent body 10 from the skin side, and has a function as a cover sheet. Thus, it is possible to prevent the upper end of the absorbent body 10 from digging into the skin of the wearer when the diaper 1 is worn. The skin sheet 36 is formed of, for example, SMS nonwoven fabric. In addition, the skin sheet 36 may not be provided.

[0067] (Back waistline 40)

[0068] The back waist circumference portion 40 has a substantially similar structure to the ventral waist circumference portion 30. That is, the back waist circumference portion 40 is disposed on the non-skin side of the absorbent body 10, and has: a skin side sheet 41 disposed at the position closest to the skin side in the thickness direction; a non-skin side sheet 42 stacked in a manner adjacent to the non-skin side of the skin side sheet 41; and a back waist elastic member 45 provided along the lateral direction between the skin side sheet 41 and the non-skin side sheet 42. In addition, it may also have a skin top sheet 46 and the like in the same manner as the ventral waist circumference portion 30 (see Figure 2 , Figure 3 ), and may further include a folded portion (not shown).

[0069] The skin side sheet 41 is a sheet member, and is formed of, for example, SMS nonwoven fabric, similarly to the abdominal waistline portion 30. The non-skin side sheet 42 is a sheet member, and is formed of, for example, SMS nonwoven fabric, etc.

[0070] The back waist elastic member 45 is a stretchable member that can be stretched in the horizontal direction and is arranged along the horizontal direction. In this embodiment, rubber thread is used. A plurality of back waist elastic members 45 are arranged in a row in the up-down direction (longitudinal direction) between the skin side sheet 41 and the non-skin side sheet 42, and are installed in a state of being stretched in the horizontal direction using adhesives such as hot melt adhesives. Through the elasticity shown by the back waist elastic member 45, the back waist portion 40 matches the back waist of the wearer. In addition, the diaper 1 of this embodiment uses rubber thread as the back waist elastic member 45 in the back waist portion 40, but a stretchable member such as a stretch sheet can also be configured to stretch the back waist portion 40 in the horizontal direction.

[0071] The appearance of the back waistline portion 40 is different from that of the ventral waistline portion 30. Figure 2 Thus, the buttocks region 40b is formed in a substantially trapezoidal shape at the lower part of the side joint 20 (side part 40sw) in the vertical direction. The width of the buttocks region 40b increases from the lower side to the upper side in the vertical direction. By providing the buttocks region 40b, the buttocks of the wearer can be covered by the back waistline part 40 when the diaper 1 is worn. That is, the buttocks region 40b has a function as a buttocks cover.

[0072] Furthermore, in the buttocks region 40b, there is provided Figure 2 The diaper 1 is provided with a plurality of curved elastic members 47, each of which ...

[0073] The end elastic part 47a is an elastic member disposed at the end of the ventral side in the longitudinal direction of the back waist circumference part 40 (the end of the lower side in the vertical direction) and closer to the ventral side (lower side) than the side joint 20 (the side joint on the side of the back waist circumference part 40). The end elastic part 47a is along the horizontal direction and can be stretched in the horizontal direction. The inclined elastic part 47b is an elastic member disposed at both sides of the back waist circumference part 40 in the horizontal direction and closer to the ventral side (lower side) than the side joint 20. The inclined elastic part 47b is inclined from the inner side to the outer side in the horizontal direction and from the ventral side to the back side, respectively, and can be stretched in the direction inclined from the inner side to the outer side in the horizontal direction and from the ventral side to the back side. Similar to the back waist elastic member 45, the curved elastic member 47 is arranged in a plurality of rows in the vertical direction (longitudinal direction) between the skin side piece 41 and the non-skin side piece 42, and is installed by using an adhesive such as a hot melt adhesive in a state stretched in the desired direction.

[0074] (Absorbent body 10)

[0075] The absorbent body 10 is placed against the crotch of the wearer when worn to absorb excrement such as urine. Figure 4 is a top view of the absorbent body 10. Figure 2 as well as Figure 4 In the figure, for convenience, the non-skin side elastic member 16 (described later) is shown with a thick line, but this does not indicate the thickness or magnitude of the stretching force of the non-skin side elastic member 16 . Figure 5A yes Figure 4 A schematic cross-sectional view as viewed in the X-X direction. Figure 5B yes Figure 4 A schematic cross-sectional view in the Y-Y direction. Figure 5C yes Figure 4 A schematic cross-sectional view in the Z-Z direction. Figure 5A A cross section taken along line XX is shown, and members located on the ventral side of line XX are omitted from the illustration. Figure 5B A cross section taken along line YY is shown, and members located on the ventral side relative to line YY are omitted from the illustration. Figure 5C A cross section taken along line ZZ is shown, and members located on the ventral side of line ZZ are omitted.

[0076] The absorbent body 10 includes: an absorbent body 11 for absorbing excrement; a top sheet 12 disposed on the skin side relative to the absorbent body 11; a back sheet 14 disposed on the non-skin side relative to the absorbent body 11; and an outer sheet 15 and a non-skin side elastic member (elastic member) 16. However, the absorbent body 10 may also include sheet members other than these. For example, a secondary sheet (not shown) may be provided between the top sheet 12 and the absorbent body 11.

[0077] The absorbent body 11 includes an absorbent core 11 a and a core wrap sheet 11 b . Figure 6: is a top view of the absorbent body 11. The absorbent core 11a is a member that absorbs and retains excrement, and is formed of, for example, liquid-absorbent fibers such as pulp fibers mixed with superabsorbent polymers (SAP). The absorbent core 11a of this embodiment is roughly hourglass-shaped when viewed from above. The absorbent core 11a has a narrowing portion that shortens the lateral length in the central portion in the longitudinal direction, and has a narrowest portion 11N with the shortest lateral length of the absorbent core 11a at a position closer to the ventral side than the center CL. The ventral widest portion 11MA and the dorsal widest portion 11MB with the longest lateral length of the absorbent core 11a are respectively provided at positions closer to the ventral side and the dorsal side than the center CL in the longitudinal direction. The lengths of the ventral widest portion 11MA and the dorsal widest portion 11MB are roughly the same. In addition, the shape of the absorbent core 11a is not limited to this shape, and may be any shape. In addition, in this embodiment, the absorbent core 11a is set as a single layer, but it may also be a state where the absorbent core 11a is overlapped in two layers in the thickness direction.

[0078] The outer peripheral surface of the absorbent core 11a is covered with a sheet member such as a liquid-permeable core wrap sheet 11b such as tissue or nonwoven fabric. In addition, the core wrap sheet 11b does not necessarily need to be provided.

[0079] The absorbent core 11a has a pair of deformation inducing portions S. The pair of deformation inducing portions S induces deformation of the absorbent core 11a. The deformation inducing portions S of this embodiment are grooves that are not cut through the thickness direction to reduce the thickness, and are provided on the back side relative to the center CL. Figure 4 As shown in the figure, a pair of deformation inducing portions S are symmetrical about the transverse center line CC, and are straight groove portions that are inclined from the ventral side to the dorsal side in the longitudinal direction and from the inner side to the outer side in the transverse direction. By having the deformation inducing portion S, the absorbent core 11a can be easily deformed starting from the deformation inducing portion S. However, the deformation inducing portion S can also be set to any shape and size corresponding to the deformation of the absorbent core 11a. In addition, the deformation inducing portion S is not limited to the groove portion, and can also be a through portion that penetrates in the thickness direction or a compressed portion that is compressed in the thickness direction, which can induce deformation. In addition, the deformation inducing portion S is not necessarily required.

[0080] The top sheet 12 is a liquid-permeable sheet, for example, a hydrophilic air-through nonwoven fabric or a spunbond nonwoven fabric is used. Figure 5A to Figure 5C In this way, the two side portions in the lateral direction are folded back toward the non-skin side so as to wrap around the absorbent body 11 .

[0081] The absorbent body 11 has a back sheet 14 and a hydrophobic outer sheet 15 disposed on the non-skin side thereof. As the back sheet 14, for example, a resin film or the like can be used, and as the outer sheet 15, for example, a nonwoven fabric having softness or the like can be used. The outer sheet 15 is disposed on the non-skin side relative to the back sheet 14, and a leak-proof wall portion 50 is formed at a position closer to the skin side than the top sheet 12.

[0082] like Figure 2 , Figure 4 as well as Figure 5B As shown in the figure, a pair of non-skin side elastic members 16 are provided along the longitudinal direction at both ends of the absorbent body 10 between the back sheet 14 and the outer sheet 15 and in the crotch portion when worn. The crotch portion corresponds to the longitudinal direction between the ventral waistline portion 30 and the dorsal waistline portion 40 of the diaper 1 in the unfolded and stretched state. In the crotch portion, both ends of the diaper 1 are the both ends of the absorbent body 10. Specifically, as Figure 2 As shown in the figure, a pair of non-skin side elastic members 16 are elastic members that can be stretched in the longitudinal direction and are shorter than the leakage-proof wall elastic members 51 and 52 described later, and are arranged between the widest part 11MA on the ventral side and the widest part 11MB on the back side of the absorbent core 11a, and are arranged across the center CL. In this embodiment, three rubber threads along the longitudinal direction are fixed between the back sheet 14 and the outer sheet 15 by adhesives in an extended state. Through the contraction of the non-skin side elastic members 16, it is easy to make the two ends of the absorbent body 10 including the absorbent core 11a stand up toward the skin side when wearing, and it is easy to make the shape of the absorbent core 11a bend so that the central part of the longitudinal direction is easily recessed.

[0083] A pair of leakage-proof wall portions 50 are provided on both sides of the absorbent body 10 in the transverse direction along the longitudinal direction of the absorbent body 10. In this embodiment, the leakage-proof wall portions 50 are formed by the outer sheet 15 and are provided with leakage-proof wall elastic members 51 and 52. Specifically, in the transverse direction, a portion of the outer sheet 15 extends outward from both side ends of the absorbent body 11, such as Figure 5A to Figure 5C By bending toward the skin side at a plurality of locations in this manner, the leakage-barrier elastic members 51 and 52 are fixed to the exterior sheet 15 to form a pair of leakage-barrier wall portions 50 having a substantially S-shaped cross section.

[0084] The pair of leakage-proof wall portions 50 respectively include a skin-side leakage-proof wall portion 50a provided at the position closest to the skin side, and a non-skin-side leakage-proof wall portion 50b provided on the non-skin side relative to the skin-side leakage-proof wall portion 50a. In the skin-side leakage-proof wall portion 50a, four leakage-proof wall elastic members 51 along the longitudinal direction are fixedly arranged in the transverse direction between the bent outer sheets 15. The four leakage-proof wall elastic members 51 are arranged close to the end portion side of the transverse outer side of the leakage-proof wall portion 50. In the non-skin-side leakage-proof wall portion 50b, two leakage-proof wall elastic members 52 along the longitudinal direction are fixedly arranged in the transverse direction between the bent outer sheets 15. The two leakage-proof wall elastic members 52 are arranged close to the end portion of the transverse inner side of the leakage-proof wall portion 50. When the diaper 1 is worn, the leakage-proof wall portion 50 stands up toward the skin side of the wearer based on the elasticity of the leakage-proof wall elastic members 51 and 52, and matches the crotch of the wearer.

[0085] like Figure 4 As shown, at both side ends of the absorbent body 10, at each end on the ventral side and the dorsal side in the longitudinal direction of the diaper 1, end fixing portions 53 are provided for fixing the leakage preventing wall portion 50 so as not to stand up.

[0086] Each end fixing portion 53 has: a fixing portion for fixing at least a portion of the mutually facing skin-side leakage-proof wall portion 50a and the non-skin-side leakage-proof wall portion 50b by adhesive or the like; and a fixing portion for fixing at least a portion of the mutually facing non-skin-side leakage-proof wall portion 50b and the top sheet 12 by adhesive or the like. In the longitudinal direction of the absorbent body 10, the portion of the outer sheet 15 between the end fixing portions 53 becomes a portion where the leakage-proof wall portion 50 can stand up. For example, when the wearer is in a sleeping position, even if the excrement blocked by the leakage-proof wall portion 50 flows forward and backward, the excrement can be blocked by the end fixing portions 53 at both ends in the longitudinal direction, and front leakage and rear leakage can be suppressed.

[0087] In addition, the absorbent body 10 has an intermittent fixing portion 54 for fixing the leakage-proof wall portion 50 to the top sheet 12 at a position spaced apart from the end fixing portion 53 on the ventral side and the end fixing portion 53 on the dorsal side in the longitudinal direction. Figure 5A As shown, the intermittent fixing part 54 utilizes adhesive etc. to fix the non-skin side leakage-proof wall part 50b and the top sheet 12 facing each other. By setting the intermittent fixing part 54 of the leakage-proof wall part 50, the length of the part that can stand up in the horizontal direction is shortened, thereby can suppress the sagging of the absorbent core 11a when wearing.

[0088] Furthermore, if Figure 4 as well as Figure 5BAs shown in FIG. 1 , the inner end of the leakage-proof wall 50 in the lateral direction has a pinching and fixing portion 55 for joining and fixing at least a portion of the skin-side leakage-proof wall 50a and the non-skin-side leakage-proof wall 50b facing each other. Specifically, the pinching and fixing portion 55 joins a portion of the skin-side leakage-proof wall 50a and the non-skin-side leakage-proof wall 50b using an adhesive or the like. The pinching and fixing portion 55 of this embodiment is provided along the longitudinal direction (longitudinal direction) of the absorbent body 10 ( Figure 4 ).

[0089] By providing the pinching and fixing part 55, it is easy to maintain the folded shape formed by the outer sheet 15 of the leakage-proof wall part 50. In the wearing state, the leakage-proof wall part 50b on the non-skin side stands up toward the skin side through the leakage-proof wall elastic member 52 of the leakage-proof wall part 50b on the non-skin side, and the leakage-proof wall part 50a on the skin side easily comes into surface contact with the wearer's skin through the leakage-proof wall elastic member 51 disposed on the leakage-proof wall part 50a on the skin side. In addition, since the pinching and fixing part 55 is a part with high rigidity, it is easy to maintain the surface shape of the leakage-proof wall part 50a on the skin side, and it is easy to firmly and closely contact with the wearer's skin.

[0090] The above-mentioned end fixing part 53, intermittent fixing part 54 and pinching fixing part 55 are formed by applying adhesive respectively, but are not limited to this. For example, they can also be formed by press-fitting means such as embossing. In addition, the end fixing part 53, the intermittent fixing part 54 and the pinching fixing part 55 are not limited to a rectangular shape when viewed from above, and can be any shape, or can be a structure in which one or more fixing parts are arranged horizontally or vertically. As the above-mentioned non-skin side elastic member 16 and the leak-proof wall elastic member 51, 52, rubber threads are used respectively, but are not limited to this. For example, elastic members such as stretch sheets can also be used. In addition, the non-skin side elastic member 16 and the leak-proof wall elastic member 51, 52 are respectively configured with a plurality of elastic members (rubber threads), but they can be either one or any number of more than two.

[0091] <About a pair of compression parts E>

[0092] like Figure 2As shown in the figure, the absorbent body 10 has a pair of compression parts E (Ea, Eb) on both sides closer to the ventral side than the center CL. The compression part E is a compression part that is compressed by applying pressure in the thickness direction from the skin side when the absorbent core 11a is covered by the core wrap sheet 11b. The pair of compression parts E includes a one-side compression part Ea located on one side in the lateral direction and an other-side compression part Eb located on the other side in the lateral direction. The one-side compression part Ea and the other-side compression part Eb are symmetrical about the lateral center line CC. In the present embodiment, the one-side compression part Ea includes two one-side compression parts Ea1 and Ea2 of a wave-like shape continuous along the longitudinal direction, and the other-side compression part Eb includes two other-side compression parts Eb1 and Eb2 of a wave-like shape continuous along the longitudinal direction.

[0093] The one-side compression portion Ea1 is also referred to as the inner compression portion Ea1, and the one-side compression portion Ea2 is also referred to as the outer compression portion Ea2. The other-side compression portion Eb1 is also referred to as the inner compression portion Eb1, and the other-side compression portion Eb2 is also referred to as the outer compression portion Eb2. The outer compression portion Ea2 is provided on the outer side (one side) compared to the inner compression portion Ea1 in the lateral direction, and the outer compression portion Eb2 is provided on the outer side (the other side) compared to the inner compression portion Eb1 in the lateral direction.

[0094] The pair of compressed portions E are provided at the crotch portion of the absorbent core 11a when the diaper 1 is in the unfolded and stretched state, and each has a curved portion F curved outward in the transverse direction. Figure 6 As shown in the figure, the one side compression part Ea1 has a curved part Fa1 curved outward in the lateral direction, and the other side compression part Eb1 has a curved part Fb1 curved outward in the lateral direction. Thus, the softness of the absorbent core 11a surrounded by the curved part Fa1 and the curved part Fb1 of the pair of compression parts E can be maintained, the shape of the absorbent core 11a can be easily maintained, and the possibility of excessive rigidity of the outer side of the absorbent core 11a in the lateral direction becoming high can be reduced, and the skin touch of the wearer when wearing it can be improved.

[0095] Figure 7A to Figure 7C is a diagram showing an absorbent body 11 of a comparative example. Fig. 7A As shown in the figure, when the absorbent core 11a is provided with a linear compression portion E along the longitudinal direction, since the area where the compression portion E is provided is small relative to the absorbent core 11a, there is a possibility that the shape of the absorbent core 11a may be deformed due to absorption of excrement such as urine or the activities of the wearer when the absorbent core 11a is worn. In order to prevent the absorbent core 11a from being deformed, if the number of the linear compression portions E is increased, the absorbent core 11a may become excessively hard, and there is a possibility that the touch relative to the wearer's skin may be reduced.

[0096] in addition, Figure 7BThe absorbent core 11a (absorber 11) has a plurality of linear compression parts E arranged in the longitudinal direction and having an inclination with respect to the longitudinal direction. Figure 7C The absorbent core 11a (absorbent body 11) is provided with linear compressed portions E which are continuously arranged in the longitudinal direction and are inclined with respect to the longitudinal direction and have a zigzag compressed portion E. Figure 7B or Figure 7C As shown in FIG. 1 , when the linear compression portion E is inclined relative to the longitudinal direction, the area where the compression portion E is provided relative to the absorbent core 11a becomes larger, so it is easy to prevent the absorbent core 11a from being deformed. Figure 7B In the compression part E shown, when worn, if the wearer's legs apply force from the lateral outer side to the inner side of the absorbent core 11a, the end of the lateral outer side and the center CL side of the highly rigid compression part E becomes a corner, and the diaper 1 (absorbent core 11a) partially contacts the wearer's legs, which may reduce the touch against the wearer's skin or cause discomfort. Figure 7C In the compression portion E shown, when worn, the apex portion of the lateral outer side of the compression portion E with high rigidity becomes a corner, and the diaper 1 (absorbent core 11a) partially contacts the wearer's legs, which may reduce the touch relative to the wearer's skin or cause discomfort.

[0097] In contrast, Figure 6 As shown in FIG. 1 , the diaper 1 includes a pair of compression parts E, one compression part Ea1 having a curved part Fa1 curved outwardly in the transverse direction, and the other compression part Eb1 having a curved part Fb1 curved outwardly in the transverse direction. Fig. 7A Compared with the straight compression part E shown in the figure, the possibility of the shape of the absorbent core 11a being deformed can be reduced, and the shape of the absorbent core 11a can be easily maintained. In addition, the compression part E is a part with high rigidity in the absorbent core 11a. On the other hand, the part surrounded by the curved part Fa1 curved toward the outside in the lateral direction and the curved part Fb1 curved toward the outside in the lateral direction can easily maintain the softness of the absorbent core 11a. Furthermore, the curved parts Fa1 and Fb1 are curved toward the outside in the lateral direction, thereby reducing the possibility of excessive hardening due to the high rigidity of the compression part E forming a corner on the outside in the lateral direction of the absorbent core 11a when worn. Therefore, in the wearing state, even when the wearer's legs are in contact with the diaper 1 from the outside in the lateral direction, the touch of the diaper 1 relative to the wearer's skin can be improved.

[0098] In addition, the pair of compressed parts E includes one compressed part Ea (Ea1, Ea2) provided on one side relative to the center CC in the horizontal direction of the absorbent core 11a, and the other compressed part Eb (Eb1, Eb2) provided on the other side relative to the center CC. The one compressed part Ea1 includes a curved part Fa1, a second curved part Fa2, and a third curved part Fa3 in the order from the ventral side to the back side in the longitudinal direction, and the other compressed part Eb1 includes a curved part Fb1, a second curved part Fb2, and a third curved part Fb3 in the order from the ventral side to the back side in the longitudinal direction.

[0099] The compression portion Ea1 on one side is as follows Figure 6 As shown in the figure, the transverse outermost end of the first curved portion Fa1 is arranged on the ventral side compared to the transverse outermost end of the second curved portion Fa2. That is, the first curved portion Fa1 and the second curved portion Fa2 are arranged at different positions in the longitudinal direction. Since the absorbent core 11a has a compression portion E having the first curved portion Fa1 and the second curved portion Fa2, the touch relative to the wearer's skin when the diaper 1 is abutted from the transverse outer side can be improved, and the rigidity of the portion between the transverse outer end of the first curved portion Fa1 and the transverse outer end of the second curved portion Fa2 arranged at different positions in the longitudinal direction can be improved, thereby improving the rigidity of the absorbent core 11a, reducing the deformation of the absorbent core 11a when worn, and making it easy to maintain the shape of the absorbent core 11a.

[0100] Furthermore, it is preferred that Figure 6 As shown, the first curved portion Fa1 and the second curved portion Fa2 constitute at least a part of the one side compression portion Ea1, and the one side compression portion Ea1 is continuous in the longitudinal direction. Specifically, the one side compression portion Ea1 is arranged in sequence from the ventral side to the dorsal side in the longitudinal direction, and the first curved portion Fa1, the part bent inwardly in the transverse direction, the second curved portion Fa2, the part bent inwardly in the transverse direction, and the third curved portion Fa3 are continuously arranged. For example, in the case where the one side compression portion Ea1 is composed of a plurality of compression portions arranged intermittently in the longitudinal direction, since the rigidity of the part where the compression portion is disconnected is low, there is a possibility that the absorbent core 11a is bent in the transverse direction or the absorbent core 11a is broken in the part where the compression portion is disconnected. In contrast, since the one side compression portion Ea1 having the first curved portion Fa1 and the second curved portion Fa2 as a part thereof is continuous in the longitudinal direction, the area overlapping with the one side compression portion Ea1 in the longitudinal direction of the absorbent core 11a can reduce the possibility that the absorbent core 11a is bent in the transverse direction. In addition, in the region overlapping with the one-side compressed portion Ea1 in the longitudinal direction of the absorbent core 11a, the possibility of the absorbent core 11a being broken can be reduced.

[0101] In the diaper 1 of the present embodiment, the one side compressed portion Ea and the other side compressed portion Eb1 have the same configuration, and the one side compressed portion Ea (Ea1, Ea2) and the other side compressed portion Eb (Eb1, Eb2) are symmetrical about the center CC in the transverse direction.

[0102] In the diaper 1 of the present embodiment, the one side compressed portion Ea1 includes: a plurality of curved portions Fa1, Fa2, Fa3 curved toward the outside in the transverse direction; and a portion curved toward the inside in the transverse direction between the curved portions Fa1, Fa2, Fa3, and one one side compressed portion Ea1 is formed by connecting the curved portions Fa1, Fa2, Fa3 and the portion curved toward the inside in the transverse direction. In this case, the curved portions Fa1, Fa2, Fa3 are portions on one side in the transverse direction relative to the straight line connecting the inflection points in the one side compressed portion Ea1, and the portion curved toward the inside in the transverse direction is a portion on the other side in the transverse direction relative to the straight line connecting the inflection points in the one side compressed portion Ea1.

[0103] In addition, as described above, the pair of compression parts E includes a compression part Ea on one side of the center C-C in the lateral direction of the absorbent core 11a, and the compression part Ea includes an inner compression part Ea1 and an outer compression part Ea2 located on the outer side in the lateral direction than the inner compression part Ea1. Similarly, the absorbent core 11a includes another compression part Eb on the other side of the center C-C in the lateral direction, and the compression part Eb includes an inner compression part Eb1 and an outer compression part Eb2 located on the outer side in the lateral direction than the inner compression part Eb1. The compression part Ea on one side includes a plurality of compression parts such as the inner compression part Ea1 and the outer compression part Ea2 in the lateral direction, thereby improving the rigidity of the absorbent core 11a in the lateral direction, thereby reducing the possibility of the shape of the absorbent core 11a being deformed, and making it easy to maintain the shape of the absorbent core 11a.

[0104] Furthermore, it is preferred that the maximum value Wes of the lateral distance between the inner compression portion Ea1 and the outer compression portion Ea2 is smaller than the lateral length Wew of the inner compression portion Ea1 from one lateral end to the other lateral end (Wes < Wew). Thus, compared with the case where the maximum value Wes of the lateral distance between the inner compression portion Ea1 and the outer compression portion Ea2 is larger than the lateral length Wew of the inner compression portion Ea1 from one lateral end to the other lateral end, the rigidity of the region between the inner compression portion Ea1 and the outer compression portion Ea2 in the lateral direction can be increased, thereby increasing the rigidity of one lateral side of the absorbent core 11a and making it easier to maintain the shape of one lateral side of the absorbent core 11a.

[0105] The pair of compression parts E having the curved parts Fa1 and Fb1 are preferably provided on the ventral side relative to the longitudinal center CL of the diaper 1. The compression part E is also a part with high rigidity in the absorbent core 11a. Therefore, by providing the compression part E at the ventral side relative to the center CL, the discomfort of the wearer caused by the compression part E contacting the buttocks of the wearer when the wearer is in a sitting posture or a lying sleeping posture can be reduced.

[0106] Furthermore, it is more preferred that the pair of compression parts E are arranged in the longitudinal direction at least a part of the urination port corresponding area of ​​the absorbent core 11a when it is worn. The urination port corresponding area of ​​the absorbent core 11a refers to the area in the absorbent core 11a that faces the excretion port position of the wearer when it is worn. For example, the urination port position of the diaper 1 for adult males is about 130 mm from the longitudinal center CL to the ventral side, and the urination port position of the diaper 1 for adult females is about 50 mm from the longitudinal center CL to the ventral side. Generally speaking, the urination port corresponding area or urination port position in disposable diapers or absorbent pads is different depending on whether the wearer is an adult or an infant, etc., and also different depending on whether the wearer is a male or a female. Therefore, the urination port corresponding area can be set to include the urination port position of both males and females, and can also be set to include the urination port position of either party in the case of a diaper for males or a diaper for females. When worn, the shape of the absorbent core 11a becomes easily deformed due to absorption of urine. However, by providing a compression portion E in at least a portion of the area corresponding to the urination opening in the longitudinal direction of the absorbent core 11a, the possibility of deformation of the shape of the absorbent core 11a can be reduced even in the state of absorbing urine, and its shape can be easily maintained.

[0107] Regarding the one-side compression part Ea and the other-side compression part Eb, it is preferable that the lateral length Wf from the other-side end of the one-side compression part Ea to the one-side end of the other-side compression part Eb is greater than the lateral length We from the one-side end of the one-side compression part Ea to the other-side end (We<Wf). In the lateral direction, the area from the other-side end of the one-side compression part Ea to the one-side end of the other-side compression part Eb is a part with lower rigidity than the compression part E, so when the absorbent core 11a is subjected to a force, it becomes an area to buffer the force. Therefore, by making the lateral length Wf from the end of the other side of the one side compression portion Ea to the end of one side of the other side compression portion Eb greater than the lateral length We from the end of one side of the one side compression portion Ea to the end of the other side, compared with the case where the lateral length Wf from the end of the other side of the one side compression portion Ea to the end of one side of the other side compression portion Eb is smaller than the lateral length We from the end of one side of the one side compression portion Ea to the end of the other side, a buffer area against the force applied to the absorbent core 11a can be formed, thereby making it easy to deform the absorbent core 11a flexibly and to provide a larger soft area in the absorbent core 11a, thereby improving the skin feel when worn.

[0108] In addition, in the absorbent core 11a having the compression part Ea on one side and the compression part Eb on the other side, it is preferred that the transverse length Wf from the end of the other side of the compression part Ea on one side to the end of one side of the compression part Eb on the other side is greater than the transverse length Wne from the side end of the narrowest part 11N where the transverse length of the absorbent core 11a is the shortest to the end of one side of the compression part Ea on one side (Wne<Wf). The more the pair of compression parts E are arranged on the outer side in the transverse direction of the absorbent core 11a, the less likely the shape of the absorbent core 11a will be deformed from the outer side in the transverse direction. Therefore, by making the lateral length Wf from the end of the other side of the one side compression portion Ea to the end of one side of the other side compression portion Eb greater than the lateral length Wne from the side end of one side of the absorbent core 11a at the narrowest portion 11N to the end of one side of the one side compression portion Ea, compared with the case where the length Wf is smaller than the length Wne, the one side compression portion Ea can be provided on the lateral outer side (one side) of the absorbent core 11a, thereby reducing the possibility of the absorbent core 11a being deformed from the lateral outer side (one side).

[0109] Preferably, in the one side compressed portion Ea and the other side compressed portion Eb of the absorbent core 11a, the longitudinal length Le from the end of the ventral side of the one side compressed portion Ea to the end of the back side is greater than the transverse length Wf from the end of the other side of the one side compressed portion Ea to the end of one side of the other side compressed portion Eb (Wf<Le). The longer the longitudinal length of the one side compressed portion Ea is, the easier it is to reduce the large-scale longitudinal deformation of the absorbent core 11a. Therefore, by making the longitudinal length Le from the end of the ventral side of the one side compressed portion Ea to the end of the back side greater than the transverse length Wf from the end of the other side of the one side compressed portion Ea to the end of one side of the other side compressed portion Eb, compared with the case where the length Le is less than the length Wf, the one side compressed portion Ea of the absorbent core 11a can be set to a longitudinally long structure, thereby reducing the possibility of deformation of the absorbent core 11a in a large range of the longitudinal direction of the absorbent core 11a, and it is easy to maintain its shape.

[0110] In addition, if Figure 2 As shown, in a diaper 1 having a pair of waist portions 30, 40, when the diaper 1 in a stretched and unfolded state is viewed in the thickness direction, it is preferred that, in a region R where the ventral waist portion 30 overlaps with the absorbent core 11a, an area where the ventral waist portion 30 and the pair of compression portions E do not overlap is larger than an area where the ventral waist portion 30 and the pair of compression portions E overlap. Figure 2 Shown the overlapping region R of ventral waistline 30 and absorbent core 11a when viewing in thickness direction with the oblique line portion obliquely downward to the left.The comparison of this area can be carried out by the well-known methods such as the comparison that relies on visual observation.Because compression part E is the part with high rigidity, so, when viewing in thickness direction, the overlapping area of ​​ventral waistline 30 and compression part E is less, then when wearing, can alleviate the discomfort that brings to the wearer more, can improve skin touch.Thereby, when viewing in thickness direction, among the overlapping region R of ventral waistline 30 and absorbent core 11a, make the area of ​​ventral waistline 30 and a pair of compression part E non-overlapping part greater than the area of ​​ventral waistline 30 and a pair of compression part E overlapping part, with the area of ​​ventral waistline 30 and a pair of compression part E non-overlapping part less than the occasion of ventral waistline 30 and a pair of compression part E overlapping part area compared, can reduce the possibility that the skin of the wearer is produced with discomfort by a pair of compression part E under wearing state.

[0111] Regarding the diaper 1, it is preferred that the length (thickness) of the absorbent core 11a in the compression part E in the thickness direction is 15% or more and 40% or less of the length (thickness) of the central part in the transverse direction of the absorbent core 11a in the thickness direction. Compared with the case where the length of the absorbent core 11a in the thickness direction at the compression part E is less than 15% of the length of the central part in the transverse direction of the absorbent core 11a, the possibility of causing discomfort to the wearer's skin due to excessive hardening of the compression part E can be reduced. In addition, compared with the case where the length of the thickness direction at the compression part E is greater than 40% of the length of the central part in the transverse direction of the absorbent core 11a, the rigidity of the absorbent core 11a can be increased, and the displacement of the absorbent core 11a can be easily reduced.

[0112] In addition, as described above, the diaper 1 has an absorbent body 10 having an absorbent core 11a, and the absorbent body 10 has a pair of leakage-proof wall portions 50 having leakage-proof wall elastic members 51 and 52 along the longitudinal direction at both ends in the lateral direction. The leakage-proof wall portions 50 stand up toward the skin side due to the contraction of the leakage-proof wall elastic members 51 and 52, thereby forming a wall, which reduces the possibility of excrement leaking outward in the lateral direction of the absorbent body 10.

[0113] When the diaper 1 has a leakage-proof wall portion 50, it is preferred that Figure 4 As shown in the figure, a pair of compression parts E is provided at the position of the inner side than the leakproof wall 50 in the horizontal direction. Through a pair of compression parts E, the possibility of the shape of the absorbent core 11a is reduced, and the shape of the absorbent core 11a is easily kept, thus, excrement can be easily absorbed. Especially when a pair of compression parts E is located at the occasion of the position of the ventral side than the longitudinal CL, the absorbent core 11a easily blocks a large amount of liquid produced by urination in a planar shape, thereby easily absorbs excrement. In addition, because the leakproof wall 50 is the part that bulges toward the skin side, so, when watching in the thickness direction, the high compression part E of rigidity is not set at the position overlapping with the leakproof wall 50, thus, along with the bulge of the leakproof wall 50, the compression part E approaches the skin of the wearer, and the skin sense of touch of the relative wearer can be reduced or the possibility of bringing discomfort to the wearer can be reduced.

[0114] When the two ends of the absorbent body 10 in the transverse direction have a pair of leakage-proof wall portions 50 having leakage-proof wall elastic members 51 and 52 along the longitudinal direction, it is preferable that the pair of leakage-proof wall portions 50 are as follows: Figure 5A to Figure 5C As shown, the leakage-proof wall portion 50 has a skin-side leakage-proof wall portion 50a disposed closest to the skin side and a non-skin-side leakage-proof wall portion 50b disposed closer to the non-skin side than the skin-side leakage-proof wall portion 50a. The inner end of the leakage-proof wall portion 50 in the lateral direction has a pinching fixing portion (first fixing portion) 55 for fixing at least a portion of the skin-side leakage-proof wall portion 50a and the non-skin-side leakage-proof wall portion 50b facing each other.

[0115] The pinching fixing portion 55 of this embodiment is as follows Figure 4 as well as Figure 5B As shown in the figure, the skin-side leakage-proof wall 50a and the non-skin-side leakage-proof wall 50b are joined and fixed by adhesive of rectangular area at the positions closer to the ventral side and the dorsal side than the center CL in the longitudinal direction. By providing the pinching and fixing part 55, it is easy to maintain the folded shape formed by the outer sheet 15 of the leakage-proof wall 50, and it is easy to maintain the shape of the two-layer structure of the skin-side leakage-proof wall 50a and the non-skin-side leakage-proof wall 50b.

[0116] In this way, in the case of the pinching and fixing part 55 that joins and fixes the skin-side leakage-proof wall part 50a and the non-skin-side leakage-proof wall part 50b, it is preferable that the pair of compression parts E have a portion overlapping with the pinching and fixing part 55 in the longitudinal direction. The portion provided with the pinching and fixing part 55 is a portion that is easy to be firmly in contact with the wearer's skin when worn, and is a portion that is easy to deform such that the absorbent core 11a is crushed by applying a force to the absorbent core 11a through the leakage-proof wall part 50. In this case, in the longitudinal direction, the pair of compression parts E have a portion overlapping with the pinching and fixing part 55, thereby, the rigidity of the compression parts E reduces the deformation of the absorbent core 11a, and the shape of the absorbent core 11a is easy to maintain.

[0117] In addition, when a pair of leakage-proof wall portions 50 having leakage-proof wall elastic members 51 and 52 extending in the longitudinal direction are provided at both ends of the absorbent body 10 in the lateral direction, it is preferable that the pair of leakage-proof wall portions 50 are as follows: Figure 5A to Figure 5C As shown in FIG. 1 , an intermittent fixing portion (second fixing portion) 54 is provided at the inner end of the leakage-proof wall portion 50 in the lateral direction to fix at least a portion of the non-skin side of the leakage-proof wall portion 50 and the skin side of the top sheet 12. The intermittent fixing portion 54 of this embodiment is as shown in FIG. Figure 4 as well as Figure 5A As shown, the central part located in the longitudinal direction is fixed by the adhesive of the rectangular area with the non-skin side of the non-skin side anti-leakage wall 50b and the skin side of the top sheet 12. By having an intermittent fixing portion 54, the anti-leakage wall 50 is fixed to the top sheet 12, and the shape of the anti-leakage wall 50 is easily maintained, thereby, the anti-leakage wall 50 is easily contacted with the skin of the wearer. In addition, in the present embodiment, the anti-leakage wall 50 is provided as a 2-layer structure having a skin-side anti-leakage wall 50a and a non-skin-side anti-leakage wall 50b, but is not limited thereto. The anti-leakage wall 50 can also be a 1-layer structure consisting of only the skin-side anti-leakage wall 50a (non-skin-side anti-leakage wall 50b).

[0118] When the diaper 1 is provided with an intermittent fixing portion 54 that joins the leak-proof wall portion 50 and the top sheet 12, it is preferred that the pair of compression portions E have a portion that overlaps with the intermittent fixing portion 54 in the longitudinal direction. The portion provided with the intermittent fixing portion 54 is a portion that is easily in close contact with the wearer's skin when worn, and a force is applied to the absorbent core 11a through the leak-proof wall portion 50, which easily causes deformation such as crushing the absorbent core 11a. Therefore, in the longitudinal direction, the pair of compression portions E have a portion that overlaps with the intermittent fixing portion 54, and thus, the rigidity of the compression portions E reduces the deformation of the absorbent core 11a, and the shape of the absorbent core 11a is easily maintained.

[0119] In the diaper 1 of this embodiment, the ventral waist portion 30 is provided with a ventral waist elastic member 35 that can be stretched and contracted in the lateral direction, and when viewed in the thickness direction, the pair of compression portions E has a portion that does not overlap with the waist elastic member 35. Thus, when viewed in the thickness direction, the portion that does not overlap with the pair of compression portions E and the waist elastic member 35 can reduce the possibility that the pair of compression portions E with high rigidity are pressed against the wearer's skin due to the contraction force of the ventral waist elastic member 35, thereby improving the skin touch relative to the wearer's skin.

[0120] On the other hand, in the ventral waist portion 30 of the diaper 1, when viewed in the thickness direction, the pair of compression portions E has a portion that does not overlap with the waist elastic member 35, and the pair of compression portions also has a portion that overlaps with the waist elastic member 35. In such a case, it is preferred that, when viewed in the thickness direction, the elastic modulus of the waist elastic member 35 overlapping with the pair of compression portions E is lower than the elastic modulus of the waist elastic member 35 not overlapping with the pair of compression portions E. In the diaper 1, the elastic modulus of the ventral waist elastic member 35 at the upper end of the ventral waist portion 30 is lower than the elastic modulus of the ventral waist elastic member 35 at the lower end. Therefore, when viewed in the thickness direction, even if the pair of compression portions E has a portion that overlaps with the waist elastic member 35, the contraction force of the waist elastic member 35 makes it easy for the absorbent core 11a to contact the wearer's skin, and the possibility of adversely affecting the wearer's skin at the portion where the compression portion E overlaps with the waist elastic member 35 can be reduced.

[0121] In addition, in order to improve the skin touch relative to the wearer's skin, it is more preferred that when the ventral waistline 30 is viewed in the thickness direction, the area of ​​the non-overlapping portion of a pair of compression portions E and the waist elastic component 35 is larger than the area of ​​the overlapping portion of a pair of compression portions E and the waist elastic component 35.

[0122] ===Other Implementation Methods===

[0123] Above, the embodiments of the present invention have been described, but the above embodiments are intended to facilitate the understanding of the present invention and are not intended to restrictively interpret the present invention. In addition, the present invention may be changed or improved without departing from its concept, and the present invention certainly also includes its equivalent configuration.

[0124] In the above-mentioned embodiment, a so-called three-part pant-type diaper having an absorbent body 10, a ventral waistline portion 30, and a dorsal waistline portion 40 is exemplified, but the present invention is not limited thereto. For example, a so-called two-part pant-type diaper having an outer body and an absorbent body in which the ventral waistline portion and the dorsal waistline portion are continuously formed as one body may be used, or a belt-type disposable diaper may be used.

[0125] In the above-mentioned embodiment, the disposable diaper 1 is described, and the structure of the above-mentioned diaper 1 can be applied to an absorbent pad for a disposable diaper used together with the disposable diaper. For example, in the case of an absorbent pad for a disposable diaper, the absorbent body 10 in the above-mentioned diaper 1 can also be used as an absorbent pad and the structure of the present invention can be applied.

[0126] In the above-mentioned embodiment, when viewed in the thickness direction, the pair of compression parts E is configured to have a portion overlapping with the abdominal waist elastic member 35 of the abdominal waist portion 30, but the present invention is not limited thereto. When the abdominal waist portion 30 is provided with the abdominal waist elastic member 35 that can be stretched in the lateral direction as in the diaper 1, the pair of compression parts E may be configured not to have a portion overlapping with the waist elastic member 35 when viewed in the thickness direction. By setting in this way, the pair of compression parts E with high rigidity are pressed against the skin of the wearer by the contraction force of the abdominal waist elastic member 35, and the possibility of reducing the skin touch relative to the wearer's skin can be reduced.

[0127] In the above-mentioned embodiment, the one side compression part Ea1 and the other side compression part Eb1 respectively include a plurality of curved parts Fa1, Fa2, Fa3, curved parts Fb1, Fb2, Fb3, but the present invention is not limited thereto. For example, the one side compression part Ea1 and the other side compression part Eb1 may be compression parts E each consisting of only one curved part Fa, Fb.

[0128] In the above-mentioned embodiment, the one-side compression portion Ea1 is formed in a wave-like structure in which these parts are continuous in the order of the first curved portion Fa1, the part curved inwardly in the transverse direction, the second curved portion Fa2, the part curved inwardly in the transverse direction, and the third curved portion Fa3 from the ventral side in the longitudinal direction toward the dorsal side, but the present invention is not limited thereto. For example, the one-side compression portion Ea1 may not have the part curved inwardly in the transverse direction but may be formed only by the curved portion Fa, or may have the curved portion Fa and a linear compression portion along the longitudinal direction. Furthermore, the one-side compression portion Ea1 does not need to be continuous and may have a discontinuous part.

[0129] In the above-mentioned embodiment, the one side compression part Ea and the other side compression part Eb are formed into a shape symmetrical about the center CC in the horizontal direction, but the present invention is not limited thereto. For example, the one side compression part Ea and the other side compression part Eb may be different shapes and sizes. For example, the curved part Fa1 of the one side compression part Ea1 and the curved part Fb1 of the other side compression part Eb1 may be provided at different positions in the longitudinal direction.

[0130] In the above-mentioned embodiment, the one side compression part Ea includes two compression parts, namely, the inner compression part Ea and the outer compression part Ea2, but the present invention is not limited thereto. The one side compression part Ea may also be composed of only the inner compression part Ea1, or may include one or more compression parts on the outer side in the lateral direction in addition to the inner compression part Ea1 and the outer compression part Ea2.

[0131] Description of Reference Numerals

[0132] 1 Diapers (Pant-type absorbent articles, disposable diapers),

[0133] 10 absorbent body,

[0134] 11 absorber,

[0135] 11a absorbent core, 11b core wrapping sheet,

[0136] 12 Top sheet (skin side sheet),

[0137] 14 back piece,

[0138] 15 outer film,

[0139] 16 non-skin side elastic member (elastic member),

[0140] 20 lateral joint (joint),

[0141] 30 ventral waist, 30sw side,

[0142] 31 skin side pieces,

[0143] 32 Non-skin side panels,

[0144] 35 Ventral waist elastic member,

[0145] 36 skin patches,

[0146] 40 back waist area, 40b hip area, 40sw side area,

[0147] 41 skin side piece,

[0148] 42 Non-skin side panels,

[0149] 45 back waist elastic member,

[0150] 46 Skin Sheets,

[0151] 47 curved elastic member, 47a end elastic portion, 47b inclined elastic portion,

[0152] 50 leakage-proof wall portion, 50a skin-side leakage-proof wall portion, 50b non-skin-side leakage-proof wall portion,

[0153] 51 leak-proof wall elastic member, 52 leak-proof wall elastic member,

[0154] 53 end fixing portion,

[0155] 54 intermittent fixing part (second fixing part),

[0156] 55 Pinch the fixing part (the first fixing part),

[0157] BH waist opening, LH leg opening,

[0158] E compression part,

[0159] Ea is the compression part on one side, Eb is the compression part on the other side,

[0160] F bend,

[0161] Fa1 bend, 1st bend,

[0162] Fa2 bend, second bend,

[0163] Fa3 bend, the third bend,

[0164] S Deformation inducing part.

Claims

1. An absorbent pad for a disposable diaper or a disposable diaper, the absorbent pad for a disposable diaper or the disposable diaper having a longitudinal direction, a transverse direction and a thickness direction intersecting each other and having an absorbent core with liquid absorption, characterized in that: In the expanded and stretched state, the absorbent core has a pair of compressed portions along the longitudinal direction at the crotch portion when worn, and each of the pair of compressed portions has a curved portion curved outward in the lateral direction.

2. The absorbent pad for disposable diapers or the disposable diaper according to claim 1, characterized in that: The pair of compression parts are provided on the ventral side of the center in the longitudinal direction of the disposable diaper or the absorbent pad for the disposable diaper.

3. The absorbent pad for disposable diapers or the disposable diaper according to claim 2, characterized in that: The pair of compressed parts is provided in at least a part of a region of the absorbent core corresponding to a urination opening when the absorbent core is worn in the longitudinal direction.

4. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The pair of compression parts comprises: a compression part on one side provided at a position closer to one side than the center of the absorptive core in the lateral direction; and a compression part on the other side provided at a position closer to the other side than the center of the absorptive core in the lateral direction. The one side compression portion includes a first curved portion and a second curved portion. The outermost end portion in the transverse direction of the first curved portion is provided at a position closer to the ventral side than the outermost end portion in the transverse direction of the second curved portion.

5. The absorbent pad for disposable diapers or the disposable diaper according to claim 4, characterized in that: The first bent portion and the second bent portion constitute at least a portion of the one-side compressed portion, and the one-side compressed portion is continuous in the longitudinal direction.

6. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The pair of compression parts comprises: a compression part on one side provided at a position closer to one side than the center of the absorptive core in the lateral direction; and a compression part on the other side provided at a position closer to the other side than the center of the absorptive core in the lateral direction. The lateral length from the end of the other side of the one-side compression portion to the end of the one side of the other-side compression portion is greater than the lateral length from the end of the one side of the one-side compression portion to the end of the other side.

7. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The pair of compression parts comprises: a compression part on one side provided at a position closer to one side than the center of the absorptive core in the lateral direction; and a compression part on the other side provided at a position closer to the other side than the center of the absorptive core in the lateral direction. The above-mentioned lateral length from the end of the above-mentioned other side of the above-mentioned one side compression portion to the end of the above-mentioned one side of the above-mentioned other side compression portion is greater than the above-mentioned lateral length from the side end of the above-mentioned one side at the narrowest part where the above-mentioned lateral length of the above-mentioned absorbent core is the shortest to the end of the above-mentioned one side of the above-mentioned one side compression portion.

8. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The pair of compression parts comprises: a compression part on one side provided at a position closer to one side than the center of the absorptive core in the lateral direction; and a compression part on the other side provided at a position closer to the other side than the center of the absorptive core in the lateral direction. The longitudinal length of the one-side compression portion from the ventral end to the dorsal end is greater than the lateral length of the one-side compression portion from the one-side end to the other-side end.

9. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The disposable diaper is a disposable diaper having a pair of waist parts. When viewed in the thickness direction, in the region where the waistline and the absorbent core overlap, an area where the waistline and the pair of compressed portions do not overlap is larger than an area where the waistline and the pair of compressed portions overlap.

10. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The disposable diaper is a disposable diaper having a pair of waist parts. The waist portion is provided with a waist elastic member that can be stretched in the transverse direction. When viewed in the thickness direction, the pair of compression parts have a portion that does not overlap with the waist elastic member.

11. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The pair of compression parts comprises: a compression part on one side provided at a position closer to one side than the center of the absorptive core in the lateral direction; and a compression part on the other side provided at a position closer to the other side than the center of the absorptive core in the lateral direction. The one-side compression portion includes an inner compression portion and an outer compression portion located further outward in the lateral direction than the inner compression portion.

12. The absorbent pad for disposable diapers or the disposable diaper according to claim 11, characterized in that: The maximum value of the distance in the lateral direction between the inner compressed portion and the outer compressed portion is smaller than the lateral length of the inner compressed portion from the one end portion to the other end portion.

13. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The length of the absorptive core in the thickness direction at the compressed portion is 15% or more and 40% or less of the length of the absorptive core in the thickness direction at the central portion in the transverse direction.

14. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The absorbent pad for disposable diapers or the disposable diaper has an absorbent body having the absorbent core. The absorbent body has a pair of leakage-proof wall portions at both ends in the transverse direction, and the pair of leakage-proof wall portions have leakage-proof wall elastic members along the longitudinal direction. The leakage-proof wall portions respectively include: a skin-side leakage-proof wall portion provided at a position closest to the skin side; and a non-skin-side leakage-proof wall portion provided at a position closer to the non-skin side than the skin-side leakage-proof wall portion. The inner end of the leakage-proof wall in the lateral direction has a first fixing portion for joining and fixing at least a portion of the skin-side leakage-proof wall and the non-skin-side leakage-proof wall facing each other. In the longitudinal direction, the pair of compression parts have a portion overlapping with the first fixing part.

15. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The absorbent pad for disposable diapers or the disposable diaper has an absorbent body having the absorbent core and skin side sheets. The absorbent body has a pair of leakage-proof wall portions at both ends in the transverse direction, and the pair of leakage-proof wall portions have leakage-proof wall elastic members along the longitudinal direction. A second fixing portion is provided for joining and fixing the non-skin side of the leakage-proof wall portion facing each other to at least a portion of the skin side of the skin side sheet. In the longitudinal direction, the pair of compression parts have a portion overlapping with the second fixing part.

16. The absorbent pad for disposable diapers or the disposable diaper according to any one of claims 1 to 3, characterized in that: The absorbent pad for disposable diapers or the disposable diaper has an absorbent body having the absorbent core. The absorbent body has leakage-proof wall portions at both ends in the transverse direction, and the leakage-proof wall portions have leakage-proof wall elastic members along the longitudinal direction. A pair of the compression portions are provided at positions further inside the leakage preventing wall portion in the lateral direction.

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