JP2010142489A - Disposable absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable absorbent article which prevents liquid absorption at a part positioned near an excretory part of a wearer of an absorbing part having an absorbing core from advancing in concentration compared with other parts and efficiently performs liquid absorption by an entire absorbing part. <P>SOLUTION: An absorbing part 13 of a diaper 1 to be a disposable absorbent article is provided with two-layered fiber set cores 21, 22. Inside the absorbing part 13, a liquid shield sheet 14 formed from liquid nonpermeable material is arranged. The liquid shield sheet 14 is arranged so that it is positioned only near an excretory part for excreting excreted liquid in the body of the wearer between the fiber set cores 21 and 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a disposable absorbent article worn on a wearer's crotch.

  When the wearer excretes excretion fluid such as urine while wearing the disposable absorbent article, the excretion fluid is the urine of the wearer's body in the absorbent part having the absorbent core of the disposable absorbent article. In many cases, a portion near the excretion site located near the excretion site to be performed is first reached. Therefore, the liquid absorption in the portion near the excretion site proceeds intensively in the absorption part, and the liquid absorption in a portion other than the portion near the excretion site tends to hardly proceed. For this reason, even though the amount of liquid absorption in the portion other than the portion near the excretion site of the absorption part has a sufficient margin with respect to the limit amount, the amount of liquid absorption in the portion near the excretion site reaches the limit amount and excretion There is a possibility that the excreted excreted liquid is not effectively absorbed by the absorption part and leaks to the outside of the absorbent article. In addition, since the liquid absorption in the portion other than the portion near the excretion site of the absorption part does not proceed effectively, the substantial liquid absorption capacity of the entire absorption part is reduced, and the liquid absorption capacity of the absorption part is not sufficiently exhibited, ineffective.

In addition, as a prior art document, patent document 1 is mentioned. In the absorbent article described in Patent Document 1, it is made of colored tissue paper or nonwoven fabric between the first and second absorbent layers constituting the absorbent core, and has substantially the same outer shape as the second absorbent layer. A colored sheet is sandwiched (see paragraphs [0037] and [0038] and FIGS. 6 to 8). Due to the color difference between the colored sheet and the first absorbent layer, the position of the central portion of the absorbent article can be easily grasped (see paragraph [0044]). The colored sheet described in Patent Document 1 and the liquid shielding sheet according to the present invention are completely different in terms of configuration, role, and the like.
JP 2006-223321 A

  Therefore, the problem to be solved by the present invention is to prevent the liquid absorption at the portion located near the excretion site of the wearer of the absorption portion having the absorption core from proceeding intensively as compared with other portions. And it is providing the disposable absorbent article which can make liquid absorption efficiently in the whole absorption part.

  In order to solve the above-mentioned problem, the invention of claim 1 is a disposable absorbent article to be worn on the crotch of the wearer, and has at least one layer of absorbent core that absorbs excretory fluid excreted by the wearer. It is formed of an absorbent part and a liquid-impermeable material, and is located only in the vicinity of the excretion site for excreting excretion liquid in the wearer's body between the absorption cores or inside any of the absorption cores. And a disposed liquid shielding sheet.

  Moreover, in invention of Claim 2, in the disposable absorbent article which concerns on invention of Claim 1, the said liquid shielding sheet has the whole outer periphery of this liquid shielding sheet seeing from the thickness direction of the said disposable absorbent article. It is located inward from the outer peripheral edge of the absorbent portion, and is arranged so that the longitudinal and lateral centers of the disposable absorbent article are located inward from the outer peripheral edge of the liquid shielding sheet. Yes.

  Moreover, in invention of Claim 3, in the disposable absorbent article which concerns on invention of Claim 1 or Claim 2, the said absorption core has a fiber assembly core which has a fiber assembly comprised at least with the aggregated fiber. The absorbent section includes a plurality of layers of the fiber assembly core, and the liquid shielding sheet is disposed between the fiber assembly cores.

  Moreover, in invention of Claim 4, in the disposable absorbent article which concerns on invention of Claim 1 or Claim 2, it has liquid permeability and is further equipped with the surface sheet arrange | positioned at the skin surface side of the said absorption part, The absorbent portion includes, as the two-layer absorbent core, an absorbent resin sheet disposed on the outer surface side of the topsheet and a fiber assembly core disposed on the outer surface side of the absorbent resin sheet, The liquid sheet is disposed between the absorbent resin sheet and the fiber assembly core, and the absorbent resin sheet does not include fibers between a plurality of liquid-permeable nonwoven sheets and the nonwoven sheet. The fiber assembly core includes a fiber assembly configured to include at least aggregated fibers.

  According to a fifth aspect of the present invention, in the disposable absorbent article according to any one of the first to fourth aspects, the liquid shielding sheet is a film-like plastic sheet.

  In the invention of claim 6, in the disposable absorbent article according to any one of claims 1 to 4, the liquid shielding sheet is a water repellent nonwoven fabric sheet.

  According to invention of Claim 1, the liquid-impervious sheet | seat formed with the liquid-impermeable material is the excretion liquid in a wearer's body between the absorption cores of an absorption part, or one of the absorption cores. It arrange | positions so that it may be located only in the vicinity of the excretion site | part which excretes. Therefore, the excreted liquid excreted from the excretion site of the wearer and reaching the absorption part is diffused around the surface of the liquid shielding sheet. For this reason, it is possible to prevent the liquid absorption in the vicinity of the excretion site located near the excretion site of the wearer of the absorption part from proceeding intensively compared to other parts, and the liquid absorption efficiently in the entire absorption part Can be performed. As a result, it is possible to effectively suppress leakage of excretory liquid occurring in a state where the liquid absorption amount of the portion other than the vicinity of the excretion site of the absorption portion has a sufficient margin with respect to the limit amount, and the substantial absorption of the entire absorption portion. The liquid volume can be improved.

  In addition, the liquid shielding sheet is disposed between the absorbent cores of the absorption part or inside any of the absorption cores, and between the skin surface side surface of the absorption part and the liquid shielding sheet, a part of the absorption core or the absorption core is provided. Exists. For this reason, it can prevent that the excretion liquid which reached | attained in the absorption part is stopped by the liquid shielding sheet, and returns to the skin surface side surface of an absorption part.

  Moreover, it arrange | positions so that a liquid shielding sheet may be located only in the vicinity of the excretion site | part which excretes excretion fluid in a wearer's body. For this reason, the excretory liquid diffused around by the liquid shielding sheet permeates through a portion where the liquid shielding sheet does not exist in the absorbent portion (the portion outside the liquid shielding sheet when viewed from the thickness direction of the disposable absorbent article). Thus, it is possible to reach the absorption core or the portion of the absorption core located on the outer surface side of the liquid shielding sheet, and as a result, it is possible to efficiently absorb the liquid in the entire absorption part.

  According to invention of Claim 2, when the liquid shielding sheet sees from the thickness direction of a disposable absorbent article, the whole outer peripheral edge of the liquid shielding sheet is located inward of the outer peripheral edge of the absorbent portion, and The center in the longitudinal direction and the lateral direction of the disposable absorbent article is located inward from the outer peripheral edge of the liquid shielding sheet. For this reason, the liquid shielding sheet can be reliably positioned in the vicinity of the excretion site where the excretion liquid is excreted in the wearer's body, and the excretion liquid that has reached the absorption part can be diffused accurately by the liquid shielding sheet.

  According to the invention described in claim 3, since the absorbent part is provided with a plurality of layers of fiber aggregate cores having fiber aggregates configured to include at least aggregated fibers, the liquid absorption capacity of the absorbent part is increased. Can be improved. In addition, since the liquid shielding sheet is disposed between the fiber assembly cores, the waste liquid that has reached the absorption portion is effectively diffused by the liquid shielding sheet, and the entire fiber assembly core of each layer is efficiently absorbed. Can be performed.

  According to invention of Claim 4, an absorption part is provided with the absorptive resin sheet arrange | positioned at the outer surface side of the surface sheet, and the fiber assembly core arrange | positioned at the outer surface side of the absorptive resin sheet. Has been. An absorbent resin sheet is disposed between the top sheet and the fiber assembly core. The absorbent resin sheet is composed of a plurality of liquid-permeable nonwoven fabric sheets and an absorbent resin powder encapsulated without containing fibers between the nonwoven fabric sheets. However, it is possible to ensure an effective liquid absorption capacity, and is excellent in water retention so that excreted liquid once absorbed cannot escape. Since such an absorptive resin sheet is arranged between the top sheet and the fiber assembly core, the liquid absorption capacity of the absorption part can be expanded while suppressing the thickness of the absorption part, and once absorbed by the absorption part. It is possible to prevent the excreted liquid from returning to the skin side of the absorbent article through the top sheet.

  Further, since the liquid shielding sheet is disposed between the absorbent resin sheet and the fiber assembly core of the absorbent part, the excretory liquid that has reached the absorbent part is effectively diffused by the liquid shielding sheet, and the absorbent resin sheet and Liquid absorption can be efficiently performed in the entire fiber assembly core.

  Moreover, since the absorbent resin sheet has a configuration in which the absorbent resin powder is encapsulated without including fibers between the nonwoven fabric sheets, when the absorbent resin powder expands due to liquid absorption, the thickness of the absorbent resin sheet Expands greatly. Moreover, in the absorbent resin sheet, the liquid absorption in the vicinity of the excretion site located near the excretion site of the wearer tends to proceed more easily than the other parts. For this reason, the liquid absorption in the vicinity of the excretion site of the absorbent resin sheet is concentrated in comparison with other parts, and the portion in the vicinity of the excretion site partially expands and rises to the skin surface side, and the urination of the wearer It may be close to the excretion site such as mouth. In such a state, when excretion fluid such as urine is excreted, the excretion fluid is concentrated in a narrow area of the absorbent resin sheet, and the absorption of the excretion fluid by the absorbent resin sheet cannot catch up. The excretory fluid may leak out of the disposable absorbent article. However, in the configuration according to the present invention, since the excretion liquid that has reached the absorption part is diffused to the surroundings by the liquid shielding sheet, the liquid absorption near the excretion site of the absorbent resin sheet is concentrated compared to other parts. Therefore, it is possible to effectively suppress the portion near the excretion site from partially expanding and rising to the skin surface side.

  According to invention of Claim 5, since a liquid shielding sheet is a film-like plastic sheet, the excretion liquid which reached the inside of an absorption part can be reliably spread | diffused to the circumference along the surface of a liquid shielding sheet.

  According to invention of Claim 6, since the water-repellent nonwoven fabric sheet has air permeability, it can avoid that the air permeability of an absorption part falls by the liquid shielding sheet arrange | positioned in an absorption part.

[First Embodiment]
FIG. 1 is a plan view of a disposable diaper (hereinafter simply referred to as “diaper”) as a disposable absorbent article according to the first embodiment of the present invention, and FIG. 2 is taken along the line A1-A1 of the diaper of FIG. It is a figure which shows the structure of a cross section typically. In addition, in FIG. 1, FIG. 2 and the other figure mentioned later, the horizontal direction X respond | corresponds to a wearer's left-right direction, the vertical direction Y respond | corresponds to a wearer's front-back or up-down direction, and thickness direction Z Corresponds to the thickness direction of the diaper 1. Further, in the configuration of the diaper 1 shown in FIG. 1, the upper side in the drawing of FIG. 1 corresponds to the front side of the diaper 1.

  The diaper 1 which concerns on this embodiment is laid and used inside crotch parts, such as a tape-type or a pants-type diaper. By laying this diaper 1 on the crotch of a tape-type or pant-type diaper, etc., the liquid absorption capacity of the diaper was reinforced, and a large amount of urine was discharged or loose stool containing a large amount of water was defecation. It will be possible to cope with the case. In addition, when normal or relatively small amount of urination or defecation is performed, if only the diaper 1 laid inside the tape-type or pants-type diaper is replaced, the outer diaper can be used as it is. There is also an advantage. A tape-type diaper is a type in which fastening members such as hook-and-loop fasteners are provided on both the left and right sides of the rear edge of the diaper. A pant-type diaper is a pair of left and right leg holes and waist holes. This is a type of diaper that is attached to the left and right leg holes through the wearer's legs.

  As shown in FIGS. 1 and 2, the diaper 1 has at least a part that is liquid-permeable, an interior material 11 that is disposed on the skin surface side, and a liquid-impermeable material that is disposed on the outer surface side. An outer covering 12 to be performed, an absorbing section 13 that is disposed between the inner covering 11 and the outer covering 12 and absorbs excretion fluid excreted by the wearer (for example, urine or water contained in stool), and an absorbing section And a liquid shielding sheet 14 disposed in the interior 13.

  The interior material 11 includes a top sheet 16 as a surface sheet, left and right side sheets 17 and the like. The top sheet 16 is arranged along the vertical direction Y at the center in the horizontal direction X on the skin surface side of the diaper 1. The left and right side sheets 17 are arranged along the vertical direction Y so as to overlap the left and right edges of the top sheet 16 from the skin surface side. The top sheet 16 is formed of a liquid-permeable synthetic fiber nonwoven fabric or woven fabric. The side sheet 17 and the side sheet 25 are formed of a water-repellent nonwoven fabric or the like.

  In addition, a thread-like elastic member 18 is provided in an extended state on the inner end of the side seat 17 in the lateral direction X. Due to the contraction of the elastic member 18, a part of the side sheet 17 rises toward the skin surface side and functions as a three-dimensional gather. Side leakage of excrement is prevented by this three-dimensional gather. Note that the three-dimensional gather including the elastic member 18 may be omitted.

  The exterior material 12 is constituted by a back sheet 19. The backsheet 19 is preferably a liquid-impervious material, a synthetic fiber nonwoven fabric having water repellency, a synthetic resin film such as polyethylene (preferably a liquid-impermeable and breathable film), or a film attached thereto. Combined composite sheets are used.

  The absorbent portion 13 includes two layers of fiber assembly cores 21 and 22 as absorbent cores. The fiber assembly cores 21 and 22 are sandwiched between the interior material 11 and the exterior material 12 in a state of being overlapped in the thickness direction Z. As a modification, the absorbent portion 13 may include three or more layers of fiber assembly cores 21 and 22.

  Each of the fiber aggregate cores 21 and 22 includes fiber aggregates 21a and 22a made of aggregated fibers, absorbent resin powder mixed or dispersed in the fiber aggregates 21a and 22a, and transparent fibers that enclose the fiber aggregates 21a and 22a. Liquid packaging sheets 21b and 22b are provided. As fibers used in the fiber assemblies 21a and 22a, defibrated pulp fibers or cellulose fibers are mainly used, and heat-fusible fibers or the like may be mixed as necessary. As the packaging sheets 21b and 22b, liquid-permeable sheets such as tissue paper are used. Of the constituent elements of the fiber assembly cores 21 and 22, the absorbent resin powder and the packaging sheets 21b and 22b may be omitted.

  As the planar shape of the fiber assemblies 21a and 22a constituting the fiber assembly cores 21 and 22, various shapes such as an hourglass shape, a substantially rectangular shape, and a substantially elliptic shape can be adopted. In the present embodiment, the planar shape of the fiber assemblies 21a and 22a is an hourglass shape. In addition, regarding the planar shape of the diaper 1, in this embodiment, an hourglass shape in which a constricted portion is formed on both the left and right sides in a substantially middle portion in the longitudinal direction Y is adopted, but various shapes such as a substantially rectangular shape are adopted. Is possible. Moreover, in this embodiment, although the fiber assembly cores 21 and 22 employ | adopted that the dimension and plane shape of the vertical direction Y and the horizontal direction X are the same, the dimension and plane shape of the vertical direction Y and the horizontal direction X are employ | adopted. Any one or both of them may be different from each other.

  The liquid shielding sheet 14 is formed of a liquid-impermeable material, and is positioned between the fiber assembly cores 21 and 22 only in the vicinity of an excretion site that excretes excretion liquid in the wearer's body when the diaper 1 is worn. The excretory liquid that is arranged to reach the inside of the absorption part 13 is diffused around the surface thereof. Further, as viewed from the thickness direction Z, the entire outer peripheral edge 14 a of the liquid shielding sheet 14 is located inward of the outer peripheral edge 13 a of the absorbing portion 13. More specifically, the liquid shielding sheet 14 is sandwiched between the inner portions of both opposing surfaces of the fiber assembly cores 21 and 22, and the opposite surfaces of the fiber assembly cores 21 and 22 around the liquid shielding sheet 14. They face each other directly without the liquid shielding sheet 14 interposed therebetween. In addition, the liquid shielding sheet 14 is disposed such that the center C1 in the longitudinal direction Y and the lateral direction X of the diaper 1 is located inward of the outer peripheral edge 14a of the liquid shielding sheet 14. The planar shape of the liquid shielding sheet 14 is a substantially rectangular shape in this embodiment, but is not limited to this shape. In addition, the center (not shown) of the vertical direction Y and the horizontal direction X of the absorption part 13 is also located inward rather than the outer periphery 14a of the liquid shielding sheet 14. FIG.

  More preferably, it is good to arrange | position the liquid-impervious sheet | seat 14 so that the center C2 may shift | deviate to a wearer's front side rather than the center C1 of the diaper 1. FIG. Thereby, the center C2 of the liquid shielding sheet 14 can be brought close to the urination opening in the wearer's genital area. Moreover, the absorption part 13 is arrange | positioned so that the center of the vertical direction Y and the horizontal direction X may correspond with the center C1 of the diaper 1 substantially.

  As a specific example of the dimensional ratio of the liquid shielding sheet 14 to the absorbing portion 13, the dimension Lx2 in the lateral direction X of the liquid shielding sheet 14 is preferably about 10% to about 70% of the dimension Lx1 in the lateral direction X of the absorbing portion 13. The dimension Ly2 in the longitudinal direction Y of the liquid shielding sheet 14 is also preferably set to a value of about 10% to about 70% of the dimension Ly1 in the longitudinal direction Y of the absorbent portion 13. More preferably, the dimension Lx2 of the liquid shielding sheet 14 in the lateral direction X is set to a value of about 30% to about 50% of the dimension Lx1 of the absorbent part 13 in the lateral direction X. The dimension Ly2 is preferably set to a value of about 25% to about 45% of the dimension Ly1 in the longitudinal direction Y of the absorber 13.

  In the present embodiment, the liquid shielding sheet 14 is formed of a film-like plastic sheet. Specific examples of the plastic sheet include a plastic film or a foamed polystyrene sheet. In addition, as the plastic sheet, there are a case where a non-hole sheet continuously formed in a planar shape without a hole is used, and a case where a porous sheet provided with a large number of minute holes is used. When a holeless sheet is used, the liquid shielding sheet 14 has an advantage that the excretory liquid can be reliably diffused around the surface of the liquid shielding sheet 14. When a porous sheet is used, the excretory liquid is blocked by adjusting the diameter of the holes provided in the liquid shielding sheet 14 and the ratio (opening ratio) of the area of the holes to the total area of the liquid shielding sheet 14. The ratio (permeability) which permeate | transmits the sheet | seat 14 can be adjusted, and it can prevent that the spreading | diffusion effect of the excretion liquid by the liquid shielding sheet 14 acts too much. Moreover, deterioration of the air permeability of the absorption part 13 by arrangement | positioning of the liquid shielding sheet 14 can be suppressed by many holes provided in the liquid shielding sheet 14. FIG.

  As described above, the liquid shielding sheet 14 is disposed so as to be located only in the vicinity of the excretion site in the wearer's body. For this reason, when excretory fluids, such as urine, are excreted in the state where the diaper 1 is worn, as shown by an arrow B in FIG. It reaches into the fiber assembly core 21 on the surface side, proceeds toward the outer surface side of the diaper 1 while being absorbed, and reaches the liquid shielding sheet 14 along the skin surface side surface of the liquid shielding sheet 14. Diffused around. Then, the excreted liquid is diffused to the outside of the liquid shielding sheet 14 and is absorbed into the fiber assembly core 22 on the outer surface side of the liquid shielding sheet 14. Further, in the process of being diffused by the liquid shielding sheet 14, the excreted liquid penetrates into the fiber assembly core 21 on the skin surface side of the liquid shielding sheet 14 and is absorbed. Further, when a part of the excreted liquid permeates through the fiber assembly core 22 to the outer surface side, it is stopped by the back sheet 19 and absorbed back into the fiber assembly core 22.

  As mentioned above, according to this embodiment, since the excretion liquid which reached | attained in the absorption part 13 is spread | diffused by the liquid shielding sheet 14, the excretion part located in the vicinity of the wearer's excretion part of the absorption part 13 It is possible to prevent the liquid absorption in the vicinity from proceeding intensively compared to the other parts, and the liquid absorption can be efficiently performed in the entire absorption part 13. As a result, it is possible to effectively suppress the leakage of excretory liquid occurring in a state where the liquid absorption amount of the part other than the vicinity of the excretion site of the absorption part 13 has a sufficient margin with respect to the limit amount, and substantially the entire absorption part 13 The liquid absorption capacity can be improved.

  In addition, the liquid shielding sheet 14 is disposed between the fiber aggregate cores 21 and 22 of the absorbing portion 13, and the fiber aggregate core 21 exists between the skin surface side surface of the absorbing portion 13 and the liquid shielding sheet 14. For this reason, it can prevent that the excretion liquid which reached | attained in the absorption part 13 is stopped by the liquid shielding sheet 14, and returns to the skin surface surface side of the absorption part 13. FIG.

  Moreover, it arrange | positions so that the liquid shielding sheet 14 may be located only in the vicinity of the excretion site | part in a wearer's body. For this reason, the excretory liquid diffused around by the liquid shielding sheet 14 permeates through the portion where the liquid shielding sheet 14 does not exist in the absorption portion 13 (the portion outside the liquid shielding sheet 14 when viewed from the thickness direction Z). Thus, it is possible to reach the fiber assembly core 22 positioned on the outer surface side of the liquid shielding sheet 14, and as a result, it is possible to efficiently absorb the liquid in the entire absorbent portion 13.

  Further, as described above, as viewed from the thickness direction Z, the entire outer peripheral edge 14a of the liquid shielding sheet 14 is located inward of the outer peripheral edge 13a of the absorbent portion 13, and the vertical direction Y and the horizontal direction of the diaper 1 The center C1 of X is located inward of the outer peripheral edge 14a of the liquid shielding sheet 14. For this reason, the liquid shielding sheet 14 can be surely positioned in the vicinity of the excretion site in the wearer's body, and the excretion liquid that has reached the absorption portion 14 can be diffused accurately by the liquid shielding sheet 14.

  Further, in the present embodiment, since the absorbent portion 13 is provided with two layers of fiber aggregate cores 21 and 22 having fiber assemblies 21a and 22a configured to include at least aggregated fibers, The liquid absorption capacity can be improved. And since the liquid shielding sheet 14 is arrange | positioned between the fiber assembly cores 21 and 22, the excretion liquid which reached | attained the absorption part 13 is diffused effectively by the liquid shielding sheet 14, and the fiber assembly core of each layer The liquid absorption can be efficiently performed in the entirety of 21 and 22.

  Moreover, since the liquid shielding sheet 14 is a film-like plastic sheet, the excretion liquid that has reached the inside of the absorbing portion 13 can be reliably diffused to the surroundings by the liquid shielding sheet 14.

[Second Embodiment]
FIG. 3 is a plan view of a diaper as a disposable absorbent article according to the second embodiment of the present invention, and FIG. 4 is a diagram schematically showing a cross-sectional configuration along the line A2-A2 of the diaper of FIG. FIG. 5 is a cross-sectional view of the absorbent resin sheet provided in the diaper of FIG. The diaper 31 according to the present embodiment is substantially different from the diaper 1 according to the first embodiment described above, in that the absorbent resin sheet 32 is added and the arrangement position of the liquid shielding sheet 14 is changed. The points corresponding to each other are denoted by the same reference numerals to avoid redundant description.

  In the diaper 31 which concerns on this embodiment, as shown in FIG.3 and FIG.4, the absorptive resin sheet 32 as an absorption core is added in the outermost surface side in the absorption part 13, and the top skin 16 side. Has been. As shown in FIG. 5, the absorbent resin sheet 32 includes a plurality of (in this embodiment, two) liquid-permeable nonwoven fabric sheets 33 and 34, and includes no fibers between the nonwoven fabric sheets 33 and 34. The absorbent resin powder 35 and the like are provided.

  As a more specific configuration, the nonwoven fabric sheets 33 and 34 are joined to each other by, for example, a plurality of joining portions 36 extending in a streak shape along the longitudinal direction Y provided at intervals in the transverse direction X. And the absorbent resin inclusion part 37 is formed between each adjacent joint part 36 between the nonwoven fabric sheets 33 and 34, and the absorbent resin powder 35 which does not contain a fiber is included in this absorbent resin inclusion part 37. Has been. Adhesives (for example, hot-melt adhesives) 38 and 39 are applied to portions of the nonwoven fabric sheets 33 and 34 that correspond to the absorbent resin inclusions 37 on the mutually opposing surfaces. The adhesives 38 and 39 have a role of fixing the absorbent resin powder 35 to the nonwoven fabric sheets 33 and 34 in the manufacturing process of the absorbent resin sheet 32. For joining the joining portion 36 of the nonwoven fabric sheets 33, 34, joining means such as heat welding or ultrasonic welding is used.

  The dimension Lx3 in the lateral direction X of the absorbent resin sheet 32 is larger than the dimension Lx2 in the lateral direction X of the liquid shielding sheet 14 and the dimension in the lateral direction X of the absorbent portion 13 defined by the fiber assembly cores 21 and 22. It is set to Lx1 or less (in this embodiment, a value smaller than the dimension Lx1). The dimension Ly3 in the longitudinal direction Y of the absorbent resin sheet 32 is larger than the dimension Ly2 in the longitudinal direction Y of the liquid shielding sheet 14, and the dimension in the longitudinal direction Y of the absorbent portion 13 defined by the fiber assembly cores 21 and 22. It is set to Ly1 or less (in this embodiment, approximately the same value as the dimension Ly1). As a planar shape of the absorbent resin sheet 32, a rectangle is employed in the present embodiment, but is not limited to a rectangle.

  In the present embodiment, the liquid shielding sheet 14 is disposed between the absorbent resin sheet 32 and the fiber assembly core 21 disposed adjacent to the outer surface side of the absorbent resin sheet 32. ing. The configuration of the liquid shielding sheet 14, the positional relationship with respect to the excretion site and the like in the wearer's body, the size condition with respect to the absorber 13, and the like are the same as those in the configuration of the first embodiment. In the present embodiment, the liquid shielding sheet 14 is not disposed between the fiber assembly cores 21 and 22, but as a modification, the liquid shielding sheet 14 may be disposed between the fiber assembly cores 21 and 22. Good. Further, in the present embodiment, the two-layer fiber assembly cores 21 and 22 are provided on the outer surface side of the absorbent resin sheet 32. However, the fiber assembly core 21 may be provided with one layer, or three layers. The above fiber assembly core 21 may be provided.

  Also in the structure which concerns on this embodiment, it arrange | positions so that the liquid shielding sheet 14 may be located only in the vicinity of the excretion site | part in a wearer's body. For this reason, when excretion fluids, such as urine, are excreted in the state where diaper 1 is worn, excretion fluid permeates top sheet 16 and reaches into absorption resin sheet 32 of absorption part 13, and is absorbed. However, the absorbent resin sheet 32 proceeds toward the outer surface side of the diaper 31, reaches the liquid shielding sheet 14, and is diffused along the skin surface side surface of the liquid shielding sheet 14. Then, the excreted liquid is diffused to the outside of the liquid shielding sheet 14, proceeds to the fiber assembly cores 21 and 22 on the outer surface side of the liquid shielding sheet 14, and is absorbed. Further, in the process of being diffused by the liquid shielding sheet 14, the excreted liquid penetrates and is absorbed into the absorbent resin sheet 32 on the skin surface side of the liquid shielding sheet 14. Further, when a part of the excreted liquid permeates through the fiber assembly core 22 to the outer surface side, it is stopped by the back sheet 19 and absorbed back into the fiber assembly core 22.

  As described above, according to the present embodiment, as described above, the function of the liquid shielding sheet 14 disposed in the absorption portion 13 can provide substantially the same effect as that of the first embodiment described above, and the following further changes. The effect becomes.

  That is, as described above, the absorbent resin sheet 32 is configured to enclose the absorbent resin powder 35 without including fibers between the nonwoven fabric sheets 33 and 34, and thus is effective while forming a thin thickness. In addition to ensuring the liquid absorption capacity, it excels in water retention so that excreted liquid once absorbed cannot escape. And since such an absorptive resin sheet 32 is arrange | positioned between the top sheet | seat 16 and the fiber assembly core 21 arrange | positioned adjacent to the outer surface side, it absorbs, suppressing the thickness of the absorption part 13. FIG. The liquid absorption capacity of the part 13 can be increased, and the excretory liquid once absorbed by the absorption part 13 can be prevented from returning to the skin surface side of the diaper 1 through the top sheet 16.

  Moreover, since the liquid shielding sheet 14 is arrange | positioned between the absorbent resin sheet 32 of the absorption part 13 and the fiber assembly core 21 arrange | positioned adjacent to the outer surface side, the excretion liquid which reached | attained in the absorption part 13 Can be effectively diffused by the liquid shielding sheet 14, and the absorbent resin sheet 32 and the fiber assembly cores 21 and 22 can be efficiently absorbed.

  Further, the absorbent resin sheet 32 has a characteristic that when the absorbent resin powder 35 expands due to liquid absorption, the thickness of the absorbent resin sheet 32 expands greatly. Moreover, in the absorbent resin sheet 32, the liquid absorption in the portion near the excretion site located near the excretion site of the wearer tends to proceed more easily than the other portions. For this reason, the liquid absorption in the portion near the excretion site of the absorbent resin sheet 32 proceeds intensively as compared with other portions, and the portion near the excretion site partially swells and rises to the skin surface side. It may be close to the excretion site such as a urination opening so as to be in close contact. In such a state, when excretion fluid such as urine is excreted, the excretion fluid is concentrated in a narrow area of the absorbent resin sheet 32, and the excretion fluid is absorbed by the absorbent resin sheet 32. There is a case where excretion fluid leaks out of the diaper 31 without catching up. However, in the configuration according to the present embodiment, the excretion liquid that has reached the absorption unit 13 is diffused to the surroundings by the liquid shielding sheet 13, so that the liquid absorption near the excretion site of the absorbent resin sheet 32 is the other part. It is possible to effectively prevent the portion near the excretion site from partially expanding and rising to the skin surface side.

[Modification]
FIG. 6 is a cross-sectional view of a diaper that is a modification of the diaper according to the first embodiment described above, and the position of the cross section relative to the entire diaper is the same as the position of the cross section shown in FIG. 2 described above. In the diaper 41 according to this modified example, as shown in FIG. 6, the liquid shielding sheet 14 is disposed inside the fiber assembly core 21 of the absorbent portion 13 (for example, a substantially intermediate portion in the thickness direction Z of the fiber assembly core 21). The fiber assembly core 22 on the outer surface side is removed. As a further modification of the configuration illustrated in FIG. 6, one or more layers of fiber assembly cores may be disposed on the outer surface side of the fiber assembly core 21. In this case, the liquid shielding sheet 14 may be disposed between the fiber assembly cores 21 as in the configuration according to the first embodiment.

  In the first and second embodiments described above, a film-like plastic sheet is used as the liquid shielding sheet 14, but the liquid shielding sheet 14 may be formed of a water-repellent nonwoven sheet. Since the water-repellent nonwoven fabric sheet has air permeability, it can be avoided that the air permeability of the absorbing portion 13 is lowered by the liquid shielding sheet 14 disposed in the absorbing portion 13.

  In the first and second embodiments described above, the present invention has been described with reference to an example in which the present invention is applied to a pad-type diaper that is used by being laid in a crotch part such as a tape-type or pant-type diaper. May be applied to tape-type diapers or pants-type diapers. Alternatively, the present invention may be applied to a sanitary napkin.

It is a top view of the disposable diaper as a disposable absorptive article concerning a 1st embodiment of the present invention. It is a figure which shows typically the structure of the cross section along the A1-A1 line of the disposable diaper of FIG. It is a top view of the disposable diaper as a disposable absorbent article which concerns on 2nd Embodiment of this invention. It is a figure which shows typically the structure of the cross section along the A2-A2 line of the disposable diaper of FIG. It is sectional drawing of the absorptive resin sheet with which the disposable diaper of FIG. 3 is equipped. It is sectional drawing of the diaper which is a diaper modification which concerns on 1st Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Disposable diaper, 11 Interior material, 12 Exterior material, 13 Absorption part, 13a Outer periphery, 14 Liquid shielding sheet, 14a Outer periphery, 16 Top sheet, 17 Side sheet, 18 Elastic member, 19 Back sheet, 21, 22 Fiber assembly Core, 21a, 22a Fiber assembly, 21b, 22b Packaging sheet, 31 Disposable diaper, 32 Absorbent resin sheet, 33, 34 Non-woven fabric sheet, 35 Absorbent resin powder, 36 Joint part, 37 Absorbent resin powder inclusion part, 38 , 39 Adhesive, 41 Disposable diapers.

Claims (6)

A disposable absorbent article worn on the wearer's crotch,
An absorbent portion having at least one layer of absorbent core that absorbs excreted fluid excreted by the wearer;
A shield made of a liquid-impermeable material and disposed so as to be located only between the absorbent cores or inside any one of the absorbent cores, in the vicinity of the excretion site that excretes excretory fluid in the wearer's body. A liquid sheet;
A disposable absorbent article comprising: The disposable absorbent article according to claim 1,
The liquid shielding sheet is located inward of the outer peripheral edge of the absorbent part as viewed from the thickness direction of the disposable absorbent article, and the disposable absorbent article A disposable absorbent article, characterized in that the center in the vertical direction and the horizontal direction is located inward of the outer peripheral edge of the liquid shielding sheet. The disposable absorbent article according to claim 1 or 2,
The absorbent core is a fiber assembly core having a fiber assembly configured to include at least aggregated fibers;
The absorbent portion includes a plurality of layers of the fiber assembly core,
The liquid absorbent sheet is disposed between the fiber assembly cores, and is a disposable absorbent article. The disposable absorbent article according to claim 1 or 2,
It further has a liquid permeability and further comprises a surface sheet disposed on the skin surface side of the absorption part,
The absorbent section includes, as the two-layer absorbent core, an absorbent resin sheet disposed on the outer surface side of the top sheet, and a fiber assembly core disposed on the outer surface side of the absorbent resin sheet,
The liquid shielding sheet is disposed between the absorbent resin sheet and the fiber assembly core,
The absorbent resin sheet comprises a plurality of liquid-permeable nonwoven fabric sheets, and an absorbent resin powder encapsulated without containing fibers between the nonwoven fabric sheets,
A disposable absorbent article, wherein the fiber assembly core has a fiber assembly including at least aggregated fibers. The disposable absorbent article according to any one of claims 1 to 4,
The liquid absorbent sheet is a film-like plastic sheet, which is a disposable absorbent article. The disposable absorbent article according to any one of claims 1 to 4,
The liquid-absorbing sheet is a water-repellent nonwoven sheet.

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