JPH0938133A - Briefs type non-returnable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent urine from leaking and to prevent the body from becoming stuffy and having a rash due to sweat around the waist by forming an opening extendable elastic member around the waist with elastic ribbons mounted so as to hold both terminals in the longitudinal direction of a non-returnable diaper between them and forming it with a permeable inside area and a water-repellant outside area. SOLUTION: The elastic ribbon 10 is fitted in the opening part around the waist of this briefs type non-returnable diaper so as to hold an extendable elastic member 24 inbetween, and the opening extendable elastic member 4 around the waist is fitted. The opening extendable elastic member 4 is provided with air permeability and also, a hydrophilic area 27 in the inside coming into contact with a wearer and the water-repellant area 26 on the outside not coming into contact with the wearer are formed. An absorptive main body 8 and an outer member 9 are joined together in an extended state in which a side seam part is developed by opening, and a laminate body is formed, and the elastic ribbon 10 is fitted on both ends in the longitudinal direction of the diaper at the part of an unjoined area 25, and the opening extendable elastic member 4 is formed.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pants-type disposable diaper used as a diaper for infants or adults, and particularly to prevent leakage from around the waist without unnecessarily tightening the waist. The present invention relates to a pants-type disposable diaper which is capable of removing the stuffiness caused by sweat or the like generated in the tightened portion around the waist on the body.

2. Description of the Related Art Conventionally, the performance required of a pants-type disposable diaper is that urine excreted from the human body is kept in the diaper and does not leak to the outside. To this end, it is disclosed in JP-A-56-25441 and JP-A-61-207607 that an elastic member having a specific shape is attached between the top sheet and the back sheet at the waist and leg openings of the diaper body. It is disclosed. Further, Japanese Patent Publication No. 5-50291 discloses that a continuous tape-shaped elastic elastic member is attached between a top sheet and a back sheet at the waist and leg openings of the diaper body. Further, it is disclosed in Japanese Patent Laid-Open No. 4-166150 that elastic members that form gathers that are substantially continuous over the entire circumference of the waist opening and leg openings are provided. However, these diapers
By strongly applying the body of the diaper to the body, the wearer feels uncomfortable at the opening around the waist due to pressure. Further, sweat and the like are accumulated around the waist which is in close contact with the body, causing stuffiness and giving a wearer an uncomfortable feeling, and in some cases, causes a rash. In addition, in order to provide good breathability, wearability, and detachability at the same time as the leakage prevention performance, we prepared a hydrophobic sheet that is separate from the diaper body and attached with an elastic elastic member,
It is disclosed in Japanese Patent Laid-Open No. 3-205053 that this is connected to the opening around the waist of the diaper body. However, since such a diaper repels the liquid on the surface of the hydrophobic sheet, sweat that accumulates around the waist causes stuffiness, which makes the wearer uncomfortable.

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned problems with the conventional pants-type diaper and to leak body fluid such as urine or sweat excreted from the human body to the outside of the diaper. The present invention is to provide a pants-type diaper that prevents rashes and prevents sweats and the like generated in the tightening part around the waist when wearing a diaper, does not cause discomfort due to stuffiness, and prevents rash due to it. .

The present invention is directed to an absorbent main body comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between these sheets, and The absorbent main body is joined by at least a part, and comprises an exterior member that surrounds the waist of the wearer's belly and wears the absorbent main body against the wearer when the wearer wears the front body and the back body of the exterior member. A waist-shaped opening and a pair of leg openings are formed by joining opposite side edges, and a stretchable elastic member is arranged along the waist opening and the pair of leg openings to be used as a pants type. A diaper,
The waist-opening elastic member is formed by an elastic ribbon that is attached so as to sandwich both longitudinal edges of the diaper when used, and has an inner region that is breathable and contacts the wearer when worn. And a pants-type disposable diaper characterized by comprising an outer region not in contact with the wearer, wherein at least a part of the outer region has water repellency.

BEST MODE FOR CARRYING OUT THE INVENTION In a pants-type disposable diaper of the present invention, an elastic elastic member at an opening around a waist is attached so as to sandwich both longitudinal edges of the diaper in a state where side seams of the diaper are released and deployed. It is formed of an elastic ribbon. As the elastic ribbon, one strip-shaped sheet is folded in two at a center line along the longitudinal direction, or two strip-shaped sheets are arranged so as to face each other, and a predetermined one near one side edge of the strip-shaped sheet is used. In the width region, the elastic member is arranged in an extended state between the opposing strip-shaped sheets, and the elastic member is formed by joining the elastic members, and in the region where the elastic member from the other side edge is not arranged, The opposing strip-shaped sheets form a non-joined region in which they are not joined, and are joined to the diaper with both longitudinal edges of the diaper being sandwiched between the opposing strip-shaped sheets in the non-joined region. In this way, the absorbent body constituting the diaper and both longitudinal edges including the edges of the exterior member are sandwiched between the strip-shaped sheets facing each other in the non-bonded region of the elastic ribbon and bonded in a covered state. Since it does not feel uncomfortable due to the bulging of both side edges of the absorbent body at the time of wearing especially around the waist and does not irritate the skin, it does not cause discomfort to the wearer, fit It is possible to obtain a diaper using a pants-type diaper that has good properties. In the disposable diaper of the present invention, the elastic ribbon preferably has air permeability and also has a water repellent region and a hydrophilic region. For example, if a breathable sheet is used as the elastic ribbon-forming sheet, the inner region that comes into contact with the skin of the wearer is made hydrophilic, and the outer region that does not come into contact with the wearer is made water-repellent. In addition to preventing the above, since sweat is quickly absorbed and diffused in the hydrophilic region even if sweat occurs, it is possible to keep the skin in a dry state and prevent rash due to stuffiness. In addition, the non-bonding region of the strip-shaped sheet and a part of the elastic elastic region adjacent thereto are made water repellent, and the remaining part of the elastic elastic region is made hydrophilic, so that the water repellent region leaks body fluid to the outside of the diaper. In addition, since the hydrophilic region adjacent to the water repellent region absorbs and diffuses the sweat around the waist, it is possible to maintain a dry state that does not cause discomfort to the wearer. As a method for producing a strip-shaped sheet having a hydrophilic region and a hydrophobic region, a higher alcohol phosphate ester salt, a higher fatty acid amide, a polyoxyethylene chain-containing product can be used if the fibers constituting the strip-shaped sheet have water repellency. If a nonionic surfactant emulsion such as a silicon compound, amino-modified silicone, or dimethylsilicone can be used to impart hydrophilicity, and the fibers constituting the strip-shaped sheet are hydrophilic, perfluoromonocarboxylic acid can be used. Water repellency is imparted by utilizing the interfacial properties possessed by acid chromium complex salts, fluorine compounds such as perfluoroalcohol acrylates, or paraffin-based, alkylethylene urea-based, higher fatty acid amide-based, and silicone-based surfactants. can do.

EXAMPLES The present invention will be described more specifically with reference to examples below, but the present invention is of course not limited to these. FIG. 1 is a perspective view showing an example of a pants-type disposable diaper of the present invention. In FIG. 1, a pants-type disposable diaper 1 has an opening 2 around the waist and an opening 3 around the legs. The waist opening 2 is folded in two so as to sandwich an elastic elastic member, and has breathability. Elastic ribbon 10 having hydrophilic region 27 and water repellent region 26
(See FIG. 5) The waist elastic opening / closing elastic member 4 is attached. Further, the front body 5 and the back body 6 which are formed to extend between the left and right leg openings 3 are adhered to each other by side seam portions 7. Adhesive closure of the side seam portion 7 is performed by superposing the front body 5 and the back body 6 on each other via the crotch portion of the exterior member 9 (see FIG. 3) so that the absorbent main body 8 (see FIG. 3) is located inside. With the rim protruding outward,
Alternatively, in a state in which both side edges are projected inward, or in a state in which one side edge is outside and the other side edge is inside, they are joined along the outermost portions of both side edges. Bonding can be performed by hot melt adhesive, pressure melting, ultrasonic melting, etc. alone or in combination. FIG. 2 shows that the absorbent main body 8 and the exterior member 9 are joined to each other to form a laminate when the side seam portion 7 of the pants-type diaper 1 of the present invention shown in FIG. FIG. 6 is a perspective view showing a state in which the elastic ribbon 10 is attached to both longitudinal end edges of the diaper in the region of the non-bonding region 25 (see FIG. 5) and the waist-opening elastic member 4 is formed. Both sides joined by the side seam portion 7 when mounted in the state of
Each of the side flaps 11 is shown as a leg flap opening / closing elastic member 1 along the left and right leg openings 3.
2 are provided. FIG. 3 is a plan development view of the absorbent main body 8 and the exterior member 9 constituting the pants-type disposable diaper of the present invention. The absorbent main body 8 is a liquid-permeable top sheet 13, a liquid-impermeable material. Of the absorbent main body 8 and the absorbent backing body 14 and the absorbent body 15.
Both side edges of the three-dimensional gather 17 are folded back on the absorbent body 15, and the three-dimensional gather forming elastic member 16 is arranged between the folded back side edge top sheet 13 and back sheet 14 to form a three-dimensional gather 17. Further, in order to form the three-dimensional gathers 17, both side edges of the folded back absorbent body 8 are adhesively fixed in the vicinity of both ends in the longitudinal direction of the absorbent main body 8 to form the three-dimensional gather folded portion 18. In addition, the three-dimensional gather 17 and the three-dimensional gather folding portion 1
8 is formed separately from the material forming the absorbent main body 8,
It may be attached to the side edge portion of the absorbent main body 8. The exterior member 9 includes an outermost layer sheet 19, a center sheet 20 arranged in a region along the longitudinal direction on the outermost layer sheet 19 where the absorbent main body 8 is joined, and outermost layers from both sides of the center sheet 20. It is composed of side seats 21 arranged on both sides of the seat 19, and further, along the leg openings 3 of the exterior member 9, between the side seats 21 and the outermost layer sheet 19, the leg opening expansion elastic. The member 12 is arranged. Further, the side seam portion 7 is formed by both side edge portions of the exterior member 9 extending to the outside of the side edge of the side seat 21, and when the side seam portion 7 is formed into a pants-type diaper, the front body 5 and the rear body portion 5 are formed. The body 6 is bonded at the pair of left and right side seam portions 7 facing each other. FIG. 4 is a plan development view showing a case where the absorbent main body 8 and the exterior member 9 are joined to form a laminated body. As shown in FIG. 4, the absorptive main body 8 is joined to the exterior member 9 in a predetermined region of the central portion thereof. FIG. 5 is a plan development view showing a state in which both longitudinal ends of the laminated body of the absorbent main body 8 and the exterior member 9 are sandwiched and joined by the non-joining regions 25 of the elastic ribbon 10. Since the longitudinal end edges of the laminate including the three-dimensional gather folded-back portions 18 formed at the longitudinal end portions of the laminate are sandwiched and covered by the non-bonding regions 25 of the elastic ribbon 10, the waist ribbon is closely attached when worn. The elastic ribbon peripheral portion has a good fit property, and even when the materials forming the three-dimensional gather 17 are overlapped to form a convex shape or the texture is hardened, the skin is not bonded to the elastic ribbon in the non-bonded region 2
Since it is in contact with 5, there is an effect that the wearer does not feel uncomfortable. FIG. 6 is a cross-sectional view when the elastic ribbon 10 is cut in the width direction, and one strip-shaped sheet 22 is bent along a center line along the lengthwise direction, and between the strip-shaped sheets 22 on the bent side. Insert the elastic member 24 in the stretched state,
This is joined to form the stretchable elastic region 23. Further, in regions other than the stretchable elastic region 23, the strip-shaped sheets 22 facing each other are not joined to each other to form a non-joining region 25, and in the non-joining region 25, a laminated body formed by the absorbent main body 8 and the exterior member 9. Are joined so as to sandwich. Figure 7
FIG. 3 is a cross-sectional view of the pants-type disposable diaper of FIG. 2 taken along line A, showing a waist-opening elastic member 4 formed by an elastic ribbon 10 having a water-repellent region 26 and a hydrophilic region 27. It is shown that the hydrophilic region 27 is formed on the side where the absorbent main body 8 is located, that is, on the inside that contacts the wearer, and the water-repellent region 26 is on the outside that does not contact the wearer. , Is joined to the diaper via the non-joining region 25. As a result, even when the body fluid reaches the waist opening, since the outer region of the waist opening stretchable elastic member 4 has water repellency, the body fluid is repelled by the water repellent sheet and does not leak to the outside. Absent. Further, since the inner region of the waist-opening elastic member 4 which is in contact with the wearer's skin has hydrophilicity, it stays between the skin and the waist-elastic elastic member 4 even if sweat occurs. However, since it is rapidly taken into the hydrophilic sheet and then released outside the body by evaporation, the wearer does not feel uncomfortable due to stuffiness. FIG. 8 is a cross-sectional view showing another example of the waist elastic member 4 around the waist when the pants-type used diaper of FIG. A hydrophilic region 27 is formed in 50%, and a water repellent region 26 is formed from the remaining stretchable elastic region 23 to the non-bonding region 25. As a result, the body fluid that has reached the waist is blocked by the water repellent region 26 and does not leak outside. Further, when sweat is generated, the sweat is immediately taken into the adjacent hydrophilic sheets and then released outside the body by evaporation, so that the wearer does not feel discomfort. Further, the range of the water repellent region 26 of the stretchable elastic region 23 is at least at the end of the laminate in order to prevent body fluid from leaking outside from the end of the laminate formed by the absorbent main body 8 and the exterior member 9. It is preferable that 30% to 70% of the stretchable elastic region 23 exists from the part. When the water-repellent area 26 of the stretchable elastic area 23 is less than 30%, the body fluid becomes hydrophilic area 2 of the waist stretchable elastic portion 4.
It passes through 7 and leaks out of the diaper. Further, when the water-repellent area 26 of the stretchable elastic area 23 exceeds 70%, the hydrophilic area 27 becomes small and it is not enough to absorb and evaporate the sweat generated in the water-repellent area 27. 4 and the wearer's skin will become stuffy due to sweating. In the pants-type disposable diaper of the present invention, polyethylene is used as the top sheet 13,
A liquid-permeable nonwoven fabric made of synthetic fibers made of polypropylene, polyester, or other thermoplastic resin can be used. However, when the three-dimensional gathers 17 are formed by the side edge portions of the top sheet 13, an effect of preventing leakage is obtained. In order to increase the height, it is preferable that only the both side edge portions of the top sheet be subjected to hydrophobic processing or be liquid impermeable. Alternatively, the three-dimensional gathers 17 may be formed by using a liquid-impermeable non-woven fabric and attaching them separately to both side edges of the absorbent main body 8. As the back sheet 14 and the center sheet 20, a liquid-impermeable polyethylene sheet, preferably a polyethylene sheet having micropores, or a liquid-impermeable sheet having moisture permeability obtained by adding a filler to a thermoplastic resin and spreading , A material with moisture permeability is used, so that it is more comfortable because there is no worry of getting stuffy. The thickness of the back sheet 14 and the center sheet 20 is preferably 20 to 40 μm. The size of pore diameter 0.05 to 5 [mu] m, it is preferable pore volume per 1 cm ³ of the film is 0.1~0.3cm ^3. A stretchable elastic member 16 for forming a solid gather, which is arranged at the top end of the solid gather 17, a stretchable elastic member 12 around the leg opening, and a stretchable elastic member 24, which is arranged on the elastic ribbon 10, are urethane films, urethane foam, rubber thread, etc. It is possible to use the elastic elastic members used for normal diapers of ordinary use as they are, and these elastic elastic members are respectively arranged in the three-dimensional gather 17 part, the leg opening 3, and the elastic ribbon 10 in an expanded state, It is adhesively fixed with a hot melt adhesive. The absorbent 15 is preferably made of fluff pulp as a main material and a super absorbent polymer in combination,
In addition, absorbent paper alone or a mixture or laminate of heat-sealing fibers or the like is used. Further, it is preferable to have a laminated structure in which the whole is wrapped with a tissue. The shape of the absorber 15 may be an hourglass shape or a rectangular shape, but the hourglass shape provides better fit. The side sheet 21 is preferably a sheet having elasticity and elasticity, and an elastomer nonwoven web alone or a laminate of at least one surface of an elastomer nonwoven web with another web can be used. Such webs include materials selected from the group including polyester fibers such as polyethylene terephthalate fibers, polyolefin fibers, polyamide fibers such as nylon fibers, cellulosic fibers such as cotton fibers, pulp fibers and mixtures thereof. A web or the like in which the produced fiber layers are hydroentangled or laminated is used. Further, a moisture-permeable and stretchable polyurethane-based film having a thickness of 5 to 40 μm, a natural rubber sheet having micropores, and a hydroentangling or laminating the fiber layer on the elastomeric nonwoven web on at least one side of a foamed sheet. It may also be a laminate of laminated webs or hydroentangled nonwoven fabrics. The outermost layer sheet 19 is made of a material selected from the group consisting of polyester fibers such as polyethylene terephthalate fibers, polyolefin fibers, polyamide fibers such as nylon fibers, cellulose fibers such as cotton fibers, pulp fibers and mixtures thereof. A web obtained by hydroentangling the produced fiber layer can be used. The outermost layer sheet 19 is bonded to the side sheet 21 to form a part of the exterior member 9. However, it is necessary that the outermost layer sheet 19 has a property of being stretched when a tensile force acts so as not to impair the elastic elasticity of the side sheet 21. However, when the pulling force is released, the side sheet 21 returns to its original state due to its elasticity, and thus the contracting property is not necessary. The elastic ribbon 10 for forming the waist-opening elastic member 4 used in the present invention is manufactured by attaching the elastic member 24 in a stretched state between the belt-shaped sheets. As the material for the belt-shaped sheet, a nonwoven fabric made of synthetic fibers made of polyethylene, polypropylene, polyurethane, polyester, or other thermoplastic resin is used, but it is relatively bulky to improve the fit around the waist when worn. A non-woven fabric having excellent flexibility is desirable. Further, as shown in FIG. 7, the hydrophilic region 27 is on the side where the absorbent main body 8 is located, that is, on the inner side in contact with the wearer, and the water-repellent region 26 is on the outer side not in contact with the wearer. When the waist elastic member 4 is formed as described above, the width of the elastic region 23 of the waist elastic member 4 is preferably 5 to 50 mm, and more preferably 20 to 30 mm. If the width of the stretchable elastic region is less than 5 mm, the area around the waist where the stretchable elastic member 4 comes into contact with the skin is too small, and the tightening pressure due to the shrinkage of the stretchable elastic member becomes large, so that marks are likely to be left on the skin, which is not preferable. Further, if the width exceeds 50 mm, the width is too wide and the appearance is not good, and it is folded inward at the time of mounting, which may cause leakage from that portion, which is not preferable. Further, as in the waist elastic elastic member 4 shown in FIG.
5 exists in a part of the elastic region 23,
Elastic region 23 of waist elastic part 4
Is preferably 15 to 50 mm in width, 25 to 3
More preferably, it is 5 mm. If the width of the stretchable elastic region is less than 15 mm, it becomes impossible to form the hydrophilic region and the water-repellent region in a well-balanced manner for imparting the function of preventing leakage and stuffiness to the waist-opening stretchable elastic member 4. Further, if the width exceeds 50 mm, the width is too wide and the appearance is not good, and it is folded inward at the time of mounting, which may cause leakage from that portion, which is not preferable.

EFFECTS OF THE INVENTION According to the present invention, leakage of urine and the like from around the waist is prevented, and sweat does not remain in the diaper in the region where the waist elastic elastic member around the waist is in close contact with the wearer. Therefore, it is possible to obtain an excellent pants-type diaper that gives a comfortable feel without stuffiness.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a pants-type disposable diaper of the present invention.

FIG. 2 is a perspective view showing a state where the side seam portion of the pants-type diaper shown in FIG. 1 is opened.

FIG. 3 is an exploded perspective view showing an absorbent main body and an exterior member of the pants-type diaper shown in FIG.

FIG. 4 is a perspective view showing a laminated state of the absorbent main body and the exterior member of the pants-type diaper shown in FIG.

5 is a perspective view showing a state in which an elastic ribbon is attached to the laminate of the absorbent main body and the exterior member of the pants-type disposable diaper of FIG.

FIG. 6 is a cross-sectional view of the elastic ribbon cut in its width direction.

7 is a cross-sectional view showing an example of a hydrophilic region and a water repellent region of the waist elastic member when the pants-type disposable diaper of FIG. 2 is cut along line A. FIG.

FIG. 8 is a cross-sectional view showing another example of the hydrophilic region and the water repellent region of the waist-opening elastic member when the pants-type disposable diaper of FIG. 2 is cut along the line A.

[Explanation of symbols]

 1. Pants-type diaper 2. Around the waist 3. Leg openings 4. Elastic waist elastic around waist 5. Front body 6. Back body 7. Side seam section 8. Absorbent body 9. Exterior member 10. Elastic ribbon 11. Side flap 12. Leg opening / closing elastic member 13. Liquid-permeable topsheet 14. Liquid impermeable back sheet 15. Absorber 16. Elastic member for three-dimensional gather formation 17. Three-dimensional gather 18. Solid gather folding section 19. Outermost layer sheet 20. Center seat 21. Side seat 22. Band-shaped sheet 23. Stretchable elastic region 24. Stretchable elastic member 25. Non-bonding area 26. Water repellent area 27. Hydrophilic area

Claims (1)

[Claims] 1. An absorbent main body comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between these sheets, and the absorbent main body is joined at least at a part thereof. The outer member surrounds the waist from the belly of the wearer and holds the absorbent main body against the wearer when the wearer wears, and joins the opposite side edges of the front body and the back body of the outer member. A pants-type disposable diaper having a waist opening and a pair of leg openings formed, and elastic elastic members arranged along the waist opening and the pair of leg openings, wherein the waist circumference The opening stretchable elastic member is formed by an elastic ribbon attached so as to sandwich both longitudinal edges of the diaper for use, and has an inner region that is breathable and contacts the wearer when worn. A pants-type disposable diaper comprising a region and an outer region not in contact with a wearer, wherein at least a part of the outer region has water repellency.