JP4825149B2 - Disposable body fluid treatment article - Google Patents

Disposable body fluid treatment article Download PDF

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JP4825149B2
JP4825149B2 JP2007037116A JP2007037116A JP4825149B2 JP 4825149 B2 JP4825149 B2 JP 4825149B2 JP 2007037116 A JP2007037116 A JP 2007037116A JP 2007037116 A JP2007037116 A JP 2007037116A JP 4825149 B2 JP4825149 B2 JP 4825149B2
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surface member
skin contact
contact side
direction
vertical direction
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JP2007175515A (en
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祥宜 三嶋
尚子 小形
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ユニ・チャーム株式会社
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  The present invention relates to disposable body fluid treatment articles such as disposable diapers, sanitary napkins and absorbent pads.

  Japanese Patent Application Laid-Open No. 11-318976 discloses a liquid-permeable top sheet positioned on the skin contact side, a liquid-impermeable back sheet positioned on the skin non-contact side, and a liquid-absorbent core interposed between the sheets. A plurality of protrusions extending in the lateral direction at the upper part of the core, and including a front waistline region and a back waistline region in the vertical direction, and a crotch region positioned between the waistline regions. Discloses disposable diapers which are arranged in the longitudinal direction with a given distance from each other.

  A convex part is formed from an absorptive material and the said surface sheet which coat | covers it, and is located in the substantially back half of a diaper. In this diaper, these convex portions can form a barrier against fluid excrement such as soft stool and watery stool, thereby preventing the excrement from flowing in the vertical direction.

  The diaper disclosed in the above publication does not have means for preventing the flow of fluid excrement in the lateral direction, and prevents excrement diffused on the top sheet from flowing toward both side edges of the diaper. I can't. In this diaper, excrement may leak to the outside of both side edges of the core and stay there.

  An object of the present invention is to prevent a body fluid such as urine, loose stool, watery stool, menstrual blood from flowing in the longitudinal direction and the lateral direction, and to be able to reliably absorb and hold the body fluid in the core An object of the present invention is to provide a body fluid treatment article.

The premise of the present invention for solving the above-mentioned problems is that it has a vertical direction and a horizontal direction intersecting the vertical direction, a skin contact side and a non-skin contact side opposite to the skin contact side, and the non-skin contact A liquid-impermeable base sheet located on the side, a liquid-absorbent core disposed on the inner surface of the base sheet, and a liquid-permeable surface located on the skin contact side and covering at least a part of the core A plurality of protrusions, wherein the surface member protrudes from the core toward the skin contact side, extends in the lateral direction, and is arranged at a given distance in the longitudinal direction, and the protrusions a body fluid treating articles of the disposable having a recess plural rows extending in the front Kiyoko direction between.

The feature of the present invention based on the premise is that a plurality of apertures are formed in the recesses of the surface member so that body fluid can pass through in the thickness direction of the surface member. From the hydrophilic fibers that are arranged in the horizontal direction and spaced apart by a given dimension, and that are alternately arranged in the vertical direction without being continuous in the vertical direction, in the convex portions and the concave portions of the surface member. fiber density of the non-skin contact side of the made fiber assembly is the skin higher than the fiber density of the contact side, a length dimension in the transverse direction of the open hole, the opening adjacent in the transverse direction The distance between the holes is almost equal.

As another example of the embodiment of the present invention, the number of the opening portions arranged in the lateral direction is in the range of 2 to 10 and the number of the opening portions arranged in the longitudinal direction is in the range of 5 to 25. And the area of the aperture is in the range of 15 to 600 mm 2 .

According to the disposable body fluid treatment article according to the present invention, the plurality of protrusions extend in the horizontal direction , and the recesses extend in the horizontal direction between the adjacent protrusions. It becomes a barrier against excrement, and the opening formed in the surface member prevents the excrement from flowing in the vertical direction, and the fiber density of the lower part of the fiber assembly forming the surface member is higher than the fiber density of the upper part. Therefore, the bodily fluid absorbed by the surface member quickly flows downward and is absorbed and held by the core, and excrement does not return to the outer surface of the surface member.

In at least the concave portion of the concavo-convex portion of the surface member, there are formed a large number of apertures through which body fluid can pass through in the thickness direction, and the apertures are separated by a given dimension in the vertical and horizontal directions . In the embodiment in which the body fluid permeates the surface member and passes through the opening portion and is absorbed and held in the core, the body fluid is still on the surface even if the body fluid diffuses on the outer surface of the surface member. There is no leakage outside the periphery of the member.

  In the surface member, in the surface member, the concavo-convex portion is formed from the upper layer fiber assembly, and an upward protruding ridge portion formed of the lower layer fiber assembly extends to a central portion in the thickness direction in the protrusion. In the embodiment, the protruding portion serves as the center of the protruding portion, and the protruding portion can be prevented from inadvertently falling to the recessed portion.

  The details of the disposable body fluid treatment article according to the present invention will be described with reference to the accompanying drawings, taking an open-type disposable diaper and a sanitary napkin as examples.

  1 and 2 are a partially broken perspective view of the disposable diaper 1 and a perspective view of the surface member 2 of FIG. 1, and FIGS. 3 and 4 are cross-sectional views taken along line AA in FIG. It is a BB sectional view taken on the line. 1 and 2, the horizontal direction is indicated by an arrow X, and the vertical direction is indicated by an arrow Y.

  The diaper 1 has a skin contact side and a non-skin contact side opposite thereto, a liquid-permeable surface member 2 located on the skin contact side, and a liquid impermeability located on the skin non-contact side. Base sheet 3, a liquid-absorbing core 4 interposed therebetween, and a substantially liquid-impermeable leak-proof cuff 5. The core 4 is joined to the inner surfaces of the surface member 2 and the base sheet 3. The diaper 1 has a front waistline region 14 and a back waistline region 16 in the vertical direction, and a crotch region 15 positioned between the waistline regions 14 and 16.

  The base sheet 3 is formed by two substantially liquid-impermeable fiber nonwoven fabrics 3a and 3b that overlap each other, and its planar shape has an hourglass shape. The base sheet 3 defines both edge portions 6 extending in the horizontal direction and both side edge portions 7 extending in the vertical direction. The side edge portions 7 are arced inward in the crotch region 14.

  A belt-like elastic member 8 around the waist that extends in the lateral direction is attached to both end edges 6 in an extended state. A plurality of leg-around elastic members 9 extending in the crotch region 15 in the longitudinal direction are attached to the side edges 7 in an extended state. The waist elastic member 8 and the leg elastic member 9 are interposed between the nonwoven fabrics 3a and 3b forming the base sheet 3, and are fixed to the nonwoven fabrics 3a and 3b.

  The surface member 2 is a fiber assembly 13 made of a large number of hydrophilic fibers, and has a substantially rectangular shape that is long in the vertical direction. The surface member 2 is located between the cuffs 5 and extends from the crotch region 15 toward the front and rear waist regions 14 and 16. The surface member 2 has a plurality of protrusions 2a that protrude upward from the core 4 and extend in the lateral direction, and a plurality of recesses 2b that extend between the protrusions 2a and extend in the horizontal direction. The protrusions 2a are arranged in the vertical direction with a given distance.

    In the surface member 2, the fiber density of the lower part of the hydrophilic fiber aggregate which forms it is higher than the fiber density of the upper part. In the recess 2b of the surface member 2, a large number of apertures 2c penetrating the surface member 2 in the thickness direction are arranged at a given distance in the lateral direction.

  In the surface member 2, fluid excrement such as urine, soft stool, and watery stool excreted on the outer surface can pass through the surface member 2 and can pass through the opening 2 c. In the surface member 2, since the fiber density in the lower part of the hydrophilic fiber aggregate forming the surface member 2 is higher than the fiber density in the upper part, the excrement that has infiltrated into the surface member 2 is increased in the thickness direction of the surface member 2 by capillary action. Move quickly from the bottom to the bottom. The excrement infiltrated into the surface member 2 passes through it and reaches the core 4 to be absorbed and held, so that the excrement does not return to the outer surface of the surface member 2.

  In the surface member 2, even if the excrement diffuses on the outer surface of the surface member 2 before invading the surface member 2, the convex portion 2a of the surface member 2 serves as a barrier against the excrement, so that the excrement extends in the vertical direction. Can be prevented from flowing. Further, in the surface member 2, even if the excrement diffuses in the lateral direction in the recess 2b, the excrement enters the aperture 2c in the process of diffusion, and is absorbed and held in the core 4 through the aperture 2c. Therefore, the flow of excrement in the lateral direction can be prevented.

In the surface member 2, it is preferable that the number of the opening portions 2c continuous in the vertical direction is 5 to 25 and the number of the opening portions 2c continuous in the horizontal direction is in the range of 2 to 10. Further, the surface member 2, it is preferable that the area of the opening portion 2c is in the range of 15~600Mm 2. When the area of the opening 2c is less than 15 mm 2 , the excrement hardly passes through the opening 2c, and the lateral diffusion of the excrement cannot be prevented. If the area of the aperture 2c exceeds 600 mm 2 , the aperture 2c occupies most of the surface member 2 depending on the number of apertures 2c, and the surface member 2 has a plurality of convex portions 2a. Difficult to form.

  In the diaper 1, the excrement does not leak to the outside of the peripheral edge of the surface member 2, and the excrement can be reliably absorbed and held by the core 4. Moreover, in the diaper 1, when it wears, since the convex part 2a of the surface member 2 contacts a wearer's skin, the outer surface whole area of the surface member 2 does not contact a wearer's skin, and a wearer The contact area of the surface member 2 with respect to the skin can be reduced.

  A pair of tape fasteners 10 are attached to both side edge portions 7 of the rear waistline region 16. A target tape 11 serving as a fastening region of the tape fastener 10 is attached to the outer surface of the base sheet 3 in the front waistline region 14.

  The tape fastener 10 has a base end portion fixed to both side edge portions 7 of the rear waist region 16 and a free end portion detachably fastened to the target tape 11. An adhesive (not shown) is applied to the free end of the tape fastener 10. The free end is bent toward the outer surface of the surface member 2 and is temporarily attached to the cuff 5. The target tape 11 is formed from a flexible plastic film.

  The cuff 5 extends on both side edges 7 of the base sheet 3 in the vertical direction. The cuff 5 includes a fixed edge portion 5a extending in the vertical direction in the vicinity of the outer sides of both side edges 4b of the core 4, a free edge portion 5b extending in the vertical direction in parallel with the fixed edge portion 5a, and front and rear waist regions 14,16. It has a fixed both end portion 5c lying and lying inward in the lateral direction of the diaper 1. An elastic member 12 extending in the vertical direction is attached to the free edge 5b in an extended state. The elastic member 12 is covered by a part of the free edge 5b.

  In the cuff 5, a side edge 5d extends laterally outward from the fixed edge 5a. The fixed edge 5 a of the cuff 5 is fixed to the side edge 7 of the base sheet 3, and the fixed both ends 5 c are fixed to the end edge 6 of the base sheet 3.

  In FIG. 1, the diaper 1 is bent in the vertical direction with the surface member 2 inside, the free edge 5 b of the cuff 5 is contracted in the vertical direction, and the free edge 5 b stands above the surface member 2. In the diaper 1, the free edge 5 b of the standing cuff 5 forms a barrier against excrement, and the excrement leaks from the side edges 7 in the crotch region 15 can be prevented.

  In the diaper 1, the end edge 6 of the base sheet 3 extends in the vertical direction from the end edge 4 a of the core 4, and the side edge 7 of the base sheet 3 and the side edge 5 d of the cuff 5 extend from the side edge 4 b of the core 4. It extends in the horizontal direction. The side edge portion 7 and the side edge portion 5d are fixed to the overlapping portions of the side edge portions 7 and 5d.

  In order to wear the diaper 1, both side edges 7 of the base sheet 3 located in the rear waistline region 16 are overlapped on the outside of both side edges 7 of the base sheet 3 located in the front waistline region 14, and the tape fastener 10. Are connected to the target tape 11 to connect the front and rear waist regions 14 and 16. The diaper 1 to which the front and rear waist areas 14 and 16 are connected has a waist opening and a leg opening.

  In the diaper 1, the surface member 2 may be located in the crotch region 15 and the front waist region 14 excluding the back waist region 16, and the surface member 2 is located in the crotch region 15 and the back waist except the front waist region 14. It may be located in the surrounding area 16. In the diaper 1, the surface member 2 may be located in at least one of the front waistline region 14 and the back waistline region 16 excluding the crotch region 15.

  5 and 6 are a partially broken perspective view of the sanitary napkin 20 and a perspective view of the surface member 24 of FIG. 5, and FIGS. 7 and 8 are cross-sectional views taken along the line CC of FIG. 5 is a cross-sectional view taken along line DD of FIG. 5 and 6, the horizontal direction is indicated by an arrow X, and the vertical direction is indicated by an arrow Y.

  The napkin 20 has a skin contact side and a non-skin contact side opposite to the skin contact side, a liquid permeable sheet 21 positioned on the skin contact side, and a liquid impermeable sheet positioned on the skin non-contact side. The base sheet 22 is composed of a liquid absorbent core 23 and a liquid permeable surface member 24 interposed between the sheets 21 and 22. The core 23 is joined to the inner surfaces of the base sheet 23 and the surface member 24. The surface member 24 is fixed to the inner surface of the liquid permeable sheet 21.

  The napkin 20 has both end edges 25 extending in the horizontal direction and both side edges 26 extending in the vertical direction. In the napkin 20, the edge portions 21a and 22a of the liquid permeable sheet 21 and the base sheet 22 extend in the vertical direction from the edge 23a of the core 23, and the overlapping portions of the edge portions 21a and 22a are fixed. . In the napkin 20, the side edge portions 21b and 22b of the liquid permeable sheet 21 and the base sheet 22 extend laterally from the side edge 23b of the core 23, and the overlapping portions of the side edge portions 21b and 22b are fixed. . An adhesive (not shown) for sticking the napkin 20 to the inner side of the shorts is applied to the outer surface of the base sheet 22.

  The surface member 24 is a laminated member formed of two upper and lower fiber assemblies 27 and 28 that are made of a number of hydrophilic fibers and overlap each other in the thickness direction, and has a substantially rectangular shape. The upper-layer fiber assembly 27 bulges upward and extends in the lateral direction, and is positioned between the convex portions 24a and the convex portions 24a that are arranged at a given distance in the longitudinal direction and extends in the lateral direction. The convex part 24a which consists of the recessed part 24b of several stripes, and protruded upwards which consists of the lower layer fiber assembly 28 is extended to the thickness direction center part 24d inside the convex part 24a. Thus, since the protruding line part 28a which consists of the lower layer fiber object 28 of higher density than the upper layer fiber assembly 27 is extended inside the protruding part 24a formed from the upper layer fiber assembly 27, the protruding line part 28a is By acting as the center of the convex portion 24a, the convex portion 24a can be prevented from inadvertently falling toward the concave portion 24b.

In the surface member 24, the basis weight of the lower layer fiber assembly 28 positioned below the thickness direction is larger than that of the upper layer fiber assembly 27 positioned above the thickness direction, and the density of the lower layer fiber assembly 28 is higher. It is higher than that of object 27. In the upper-layer fiber assembly 27, the basis weight is preferably in the range of 20 to 200 g / m 2 , and the density is preferably in the range of 0.0004 to 0.04 g / cm 3 . In the lower layer fiber assembly 28, the basis weight is preferably in the range of 100 to 250 g / m 2 , and the density is preferably in the range of 0.01 to 0.25 g / cm 3 .

  A large number of apertures 24 c that penetrate the surface member 24 in the thickness direction are formed in the convex portions 24 a and the concave portions 24 b of the surface member 24. The opening portion 24c has the convex portion 24a and the concave portion 24b arranged in a lateral direction with a given distance from each other. In the convex portion 24a adjacent in the vertical direction, the opening portion 24c is not continuous in the vertical direction. Are lined up alternately. Thus, since the opening 24c does not continue in the vertical direction, the convex portion 24a does not lose its function as a barrier against menstrual blood, and menstrual blood does not leak out.

  The menstrual blood excreted on the outer surface of the liquid-permeable sheet 21 passes through the sheet 21 and reaches the outer surface of the surface member 24. The menstrual blood that has reached the outer surface of the surface member 24 can pass through the surface member 24 and pass through the opening 24c, and the basis weight of the lower layer fiber assembly 28 is larger than that of the upper layer fiber assembly 27. Since the density of the lower fiber aggregate 28 is higher than that of the upper fiber aggregate 27, menstrual blood that has permeated into the surface member 24 quickly moves from the upper fiber aggregate 27 toward the lower fiber aggregate 28 by capillary action. . The menstrual blood that has permeated into the surface member 24 passes through it and reaches the core 23, and is absorbed and held in the core 23.

  In the surface member 24, even if it diffuses on the outer surface of the surface member 24 before menstrual blood permeates into the surface member 24, the convex portion 24 a of the surface member 24 prevents menstrual blood from flowing in the vertical direction. it can. Even if menstrual blood diffuses laterally in the recess 24b, menstrual blood enters the aperture 24c in the process of diffusion, and is absorbed and held in the core 23 through the aperture 24c. Can be prevented from flowing in the lateral direction.

  In the surface member 24, even if menstrual blood is excreted in the convex portion 24a, the menstrual blood reaches the core 23 through the opening 24c formed in the convex portion 24a, and is absorbed and held in the core 23. It is possible to prevent diffusion of menstrual blood in the convex portion 24a.

  As the hydrophilic fibers forming the surface member 24, any one of thermoplastic synthetic resin fibers, pulp fibers, regenerated fibers or a mixture of these fibers subjected to hydrophilic treatment can be used. As the thermoplastic synthetic resin fiber, polyolefin-based, polyester-based, or polyamide-based fiber can be used. Cellulose fibers such as rayon and acetate can be used as the recycled fibers. In the surface member 24, superabsorbent polymer particles may be mixed in the fiber aggregates 13, 25, and 26 made of hydrophilic fibers. As the superabsorbent polymer particles, starch-based, cellulose-based or synthetic polymer-based particles can be used.

  As the fiber nonwoven fabrics 3a and 3b forming the base sheet 3, a hydrophobic fiber nonwoven fabric or a two-layer nonwoven fabric in which a hydrophobic fiber nonwoven fabric is superimposed can be used. The base sheet 3 may be a liquid impermeable plastic film or a composite sheet in which a liquid impermeable plastic film is fixed to a hydrophobic fiber nonwoven fabric. A hydrophobic fiber nonwoven fabric can be used for the leak-proof cuff 5. For the liquid-permeable sheet 21, a hydrophilic fiber nonwoven fabric or a plastic film having a large number of fine holes can be used.

  The nonwoven fabrics 3a and 3b and the leak-proof cuff 5 forming the base sheet 3 are sandwiched between fiber nonwoven fabrics by a melt-blown method having high water resistance and fiber nonwoven fabrics by a spunbond method having high strength and high flexibility. A composite nonwoven fabric can also be used.

  As a nonwoven fabric, what was manufactured by each manufacturing method of a spunlace, a needle punch, a melt blown, a thermal bond, a spun bond, a chemical bond, and an air through can be used. As a constituent fiber of the nonwoven fabric, polyolefin-based, polyester-based, polyamide-based fibers, polyethylene / polypropylene, or core-sheath type composite fibers or parallel type composite fibers made of polyethylene / polyester can be used.

  The cores 4 and 23 are a mixture of fluff pulp and superabsorbent polymer particles, or a mixture of fluff pulp, superabsorbent polymer particles and thermoplastic synthetic resin fibers, and are compressed to a required thickness. The cores 4 and 23 are preferably entirely coated and bonded to a tissue paper in order to prevent the deformation of the cores and the dropping of the polymer particles.

  For fixing the surface members 2 and 24, fixing the liquid-permeable sheet 21, bonding the cores 4 and 23, fixing the leak-proof cuff 5, and fixing the elastic members 8, 9, and 12; Heat welding means such as heat sealing and ultrasonic bonding can be used.

  In addition to the open type diaper 1 and the sanitary napkin 20, the present invention can also be applied to an absorbent pad that is attached to the inside of a pant-type diaper or diaper cover in which the front and rear waist areas are connected in advance. it can.

The partial fracture perspective view of a diaper. The perspective view of the surface member of FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 3 is a cross-sectional view taken along line B-B in FIG. 1. The partially broken perspective view of a napkin. The perspective view of the surface member of FIG. CC sectional view taken on the line of FIG. The DD sectional view taken on the line of FIG.

1 disposable diaper (disposable body fluid treatment article)
2 Liquid-permeable surface member 2a Convex part 2b Concave part 2c Opening part 2d Outer peripheral surface 2e Thickness direction center part 3 Liquid impervious base sheet 4 Absorbent core 7 Both ends edge part 8 Both side edge part 13 Fiber assembly 20 For physiological use Napkin 22 Liquid-impermeable base sheet 23 Liquid-absorbent core 24 Liquid-permeable surface member 24a Convex part 24b Concave part 24c Opening part 24d Thickness direction central part 25 Both-ends edge part 26 Both-sides edge part 27 Upper-layer fiber assembly 28 Lower-layer fiber assembly Object 28a ridge

Claims (2)

  1. A liquid-impermeable base sheet having a longitudinal direction and a transverse direction intersecting the longitudinal direction, a skin contact side and a non-skin contact side opposite to the skin contact side, and located on the non-skin contact side; A liquid-absorbent core disposed on the inner surface of the base sheet, and a liquid-permeable surface member that is located on the skin contact side and covers at least a part of the core, wherein the surface member is the core and plural rows of protruding portions arranged spaced a given dimension from the said longitudinal direction extends into the laterally raised to the skin contact side, the recess of the plural rows extending in the front Kiyoko direction between the convex portion In a disposable body fluid treatment article having
    In the concave portion of the surface member, there are formed a plurality of apertures through which body fluid can pass through in the thickness direction, and the apertures are spaced apart by a given dimension in the vertical direction and the horizontal direction. Lined up and alternately arranged in the vertical direction without being connected in the vertical direction,
    In the convex part and the concave part of the surface member, the fiber density on the non-skin contact side of the fiber aggregate made of hydrophilic fibers forming them is higher than the fiber density on the skin contact side,
    The article and the length dimension in the transverse direction of the aperture portion, and the spaced distance of the aperture portion to each other adjacent to each other in the transverse direction, characterized in that approximately equal.
  2. The number of the apertures arranged in the lateral direction is in the range of 2 to 10, the number of the apertures arranged in the vertical direction is in the range of 5 to 25, and the area of the apertures is 15 to 600 mm 2. The article of claim 1 in the range of.
JP2007037116A 2007-02-16 2007-02-16 Disposable body fluid treatment article Expired - Fee Related JP4825149B2 (en)

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JP3587677B2 (en) * 1998-03-26 2004-11-10 ユニ・チャーム株式会社 Liquid permeable surface sheet for body fluid absorbing articles
JP3375282B2 (en) * 1998-05-08 2003-02-10 ユニ・チャーム株式会社 Disposable diapers
JP3490291B2 (en) * 1998-05-18 2004-01-26 ユニ・チャーム株式会社 Absorbent articles
JP4008206B2 (en) * 2001-05-01 2007-11-14 ユニ・チャーム株式会社 Disposable body fluid treatment article

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