JP2007021009A - Pants-type diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pants-type diaper providing leg opening parts with favorable wearing texture and fitting property and having superior leakage prevention effect. <P>SOLUTION: This pants-type diaper 1 comprises a front piece 2, a crotch part 4 and a back piece 6, and is formed with joint parts 14 between the front piece 4 and the back piece 6, a single waist opening part 8 and the pair of leg openings 10 by joining the corresponding side edges of the front piece 2 and the back piece 6 together. This pants-type diaper 1 is further provided with leg extensible materials 12 disposed along the leg opening parts 10. In the joint parts 14, the end position 12a of the leg extensible materials in the side of the front piece 2 and the end position 12b in the side of the back piece 6 are so disposed as to be deflected vertically to the diaper at least in one part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pants-type diaper in which one waist opening and a pair of leg openings are formed.

  The pant-type diaper is composed of, for example, the front body 2, the crotch part 4 and the back body 6, as in the pant-type diaper 100 shown in FIG. They are joined together to form one waist opening 8 and a pair of leg openings 10. And the structure which arrange | positions elastic materials, such as thread rubber, along the waist periphery opening part 8 and the leg periphery opening part 10 is common (for example, refer patent document 1).

  Such pants-type diapers can be worn by the wearer in the same manner as putting cloth pants on, so that the diaper can be changed in a short time, while the wearer is standing You can also exchange diapers. In addition, unlike a tape-type diaper, there is no need to adjust the size around the waist with a fixed tape, and the diaper can be easily replaced.

  However, in the pants-type diaper as described above, the elastic material arranged along the leg opening may stimulate the wearer's skin and may deteriorate the feeling of wear, or may damage the wearer's skin. Yes, there was a problem in terms of wear and fit at the opening around the leg. This problem becomes more apparent in diapers for adults (for the elderly and persons with disabilities) who have large individual differences in the dimensions of the wearer's legs and may be used outside the range of appropriate dimensions. Become.

  Therefore, in order to solve the above-mentioned problems, a slit is formed from the opening around the leg toward the waist direction (above the diaper), and the portion divided by the slit is attached / detached by a connecting member such as an adhesive tape or a planar fastener. A pants-type diaper that can be connected has been proposed (see, for example, Patent Document 2).

Registered Utility Model No. 3024357 Japanese Utility Model Publication No. 6-65409

  The underpants type diaper described in Patent Literature 2 can adjust the size of the leg opening by the connecting member, so that it is easy to fit the wearer's leg and the leg opening of the diaper, and the wear feeling is good. Yes, the effect that it is difficult to damage the wearer's skin can be expected. However, in the above-mentioned pants-type diaper, in addition to the possibility that excrement may leak from the slit portion, if the connecting member comes off due to rubbing between the clothing and the diaper, the slit is opened and the leg circumference There was also a risk of excrement leaking from the opening. That is, in terms of the certainty of leakage prevention, it is not fully satisfactory, and the problem to be solved still remains.

  Thus, at present, there is no disclosure of a pant-type diaper that has a good feeling of wearing and fit at the opening around the leg and is excellent in the prevention of leakage, and such a pant-type diaper is eagerly desired. ing. The present invention has been made to solve the problems of the prior art, and is a pants-type diaper having a good feeling of wearing and fitting at the opening around the leg and excellent reliability of leakage prevention. It is to provide.

  As a result of intensive studies to solve the above-described problems of the prior art, the present inventors have found that in a pant-type diaper in which an elastic material is disposed along the opening around the leg as described above, the front body and the back The corresponding side edges of the body are often joined together by heat sealing, and the stretch material cured by this heat sealing deteriorates the feeling of wearing around the legs and is a cause of damaging the skin of the wearer. Obtained. And it came to the idea that the said subject could be solved by devising arrangement | positioning of the elastic material in the junction part of a front body and a back body, and completed this invention. Specifically, the following pant-type diapers are provided by the present invention.

[1] A front body, a crotch part, and a back body, each side part corresponding to the front body and the back body being joined together, and a joint part between the front body and the back body, A pant-type diaper having a waist opening and a pair of leg openings, further comprising a leg stretchable material arranged along the leg openings, wherein the legs are stretched around the legs. A pants-type diaper in which an end position on the front body side and an end position on the back body side of the material are arranged at least one place in the vertical direction of the diaper.

[2] The absorbent pad comprising: a sheet-like exterior member that forms each part of the front body, the crotch part, and the back body; and an absorbent pad that is disposed on at least a part of the crotch part of the exterior member. Is composed of a liquid-permeable top sheet, a liquid-impermeable back sheet and an absorber interposed between both sheets, and the side edges of the exterior member are joined together, The underpants type diaper according to the above [1], in which one waist opening and a pair of leg openings are formed.

[3] A top sheet, a back sheet, and an absorber interposed in at least a portion between both sheets, and the front body, the crotch part, and the crotch by the top sheet and / or the back sheet. Each part of the back body is formed, side edges of the top sheet and / or the back sheet are joined together, and the joint, one waist opening, and a pair of leg openings are formed. 1] The underpants type diaper described in 1].

[4] A plurality of the leg-surrounding elastic members are provided, and in the joint portion, the end position on the front body side and the end position on the rear body side of the leg-surrounding stretch material are vertically aligned at all locations. The underpants type diaper according to any one of [1] to [3], wherein the pants type diapers are arranged so as to be shifted to each other.

  The pants-type diaper of the present invention has a good wearing feeling and fit at the opening around the leg, and is excellent in certainty of preventing leakage.

  Hereinafter, the best mode for carrying out the pants-type diaper of the present invention will be specifically described with reference to the drawings. However, the present invention broadly encompasses pants-type diapers having the invention-specific matters, and is not limited to the following embodiments.

[1] Leg elastics:
The underpants type diaper of the present invention is composed of the front body 2, the crotch 4 and the back body 6, as in the underpants type diaper 1 shown in FIG. 2, and the corresponding sides of the front body 2 and the back body 6. The edges are joined together to form a joint 14 between the front body 2 and the back body 6, one waist opening 8 and a pair of leg openings 10. Moreover, the leg periphery elastic material 12 arrange | positioned along the leg periphery opening part 10 is further provided.

  In the pants-type diaper of the present invention, for example, as in the pants-type diaper 1 shown in FIG. 2, at the joint portion 14 between the front body 2 and the back body 6, The end position 12a and the end position 12b on the back body 6 side are arranged at least one place shifted in the vertical direction of the diaper.

  Conventional pants-type diapers are arranged so that the end position on the front body side of the elastic material around the leg matches the end position on the back body side of the elastic material around the leg at the joint between the front body and the back body It was common (see, for example, Patent Document 1 and FIG. 1).

  However, in the pants-type diaper configured as described above, the front-body-side leg-stretchable material and the rear-body-side leg-stretchable material overlap each other at the joint between the front body and the backbody. The thickness of the part increases. Therefore, when the front body and the back body are joined by heat sealing, the stretchable material cured by the heat sealing may deteriorate the feeling of wearing around the legs, and may cause a situation in which the wearer's skin is damaged. .

  On the other hand, like the pants-type diaper of the present invention, at the joint between the front body and the back body, the end position on the front body side of the leg stretchable material and the end part on the back body side of the leg stretchable material If the position is shifted in at least one place in the vertical direction of the diaper, it is possible to reduce the overlapping part of the leg body elastic material on the front body side and the leg elastic material on the back body side, and the thickness of the joint Can be suppressed. Therefore, even if the front body and the back body are joined by heat sealing, the stretchable material cured by heat sealing can deteriorate the feeling of wearing around the legs and effectively prevent the wearer's skin from being damaged. it can. That is, the pants-type diaper of the present invention has a good feeling of wearing and fit at the opening around the leg.

  In addition, since the pants-type diaper of the present invention has a good feeling of wearing and fit at the opening around the leg, it is necessary to form a slit at the opening around the leg like the pant-type diaper described in Patent Document 2. Absent. Therefore, there is no possibility that excrement leaks out from the slit part, or excrement leaks out from the opening around the leg due to the detachment of the connecting member / opening of the slit, and the leakage prevention reliability is excellent.

  Hereinafter, embodiments of the pant-type diaper of the present invention will be described more specifically. For example, in the pant-type diaper 1 shown in FIG. 2, three leg-around elastic members 12 are arranged along the leg opening 10 on the front body 2 side and three on the back body 6 side. Among these, about each leg leg elastic 12 on the upper side of the diaper, at the joint portion 14 between the front body 2 and the back body 6, the end position 12a on the front body 2 side and the end position on the back body 6 side. 12b are arranged so as to coincide with each other, but each of the two leg-around elastic members 12 located on the lower side of the diaper has an end position 12a on the front body 2 side and an end position 12b on the back body 6 side. And are shifted.

  The pants-type diaper of the present invention includes a leg-surrounding elastic member arranged along the leg-surrounding opening. This "arrangement along the leg opening" means that the leg elastic is sufficient if it is arranged at or near the outer edge of the leg opening, and the leg elastic completely surrounds the leg opening. It does not mean that they are continuously arranged. FIG. 3 shows an example of an intermediate body of a pants-type diaper before the corresponding side edges of the front body 2 and the back body 6 are joined to each other. Like this diaper intermediate 40, the front body 2 The leg circumference elastic material 12 arranged on the side and the leg circumference elastic material 12 arranged on the back body side are configured separately, and the leg circumference elastic material 12 is divided into the rear body 6 side and the front body 2. It may be arranged in a U-shape and an inverted U-shape on each side.

  Moreover, in the underpants type diaper of this invention, it is necessary to shift | deviate and arrange | position the edge part position of a leg periphery elastic material to the up-down direction of a diaper. The “upper and lower direction of the diaper” means the upper and lower direction when the waist opening side of the joint is “up” and the leg opening side is “down”.

  The phrase “place the leg elastics in a staggered manner” is sufficient if the leg elastics are arranged so as not to overlap each other, and the shifted leg elastics may be arranged adjacent to each other. . However, in order to enjoy the effect of the present invention more reliably, it is preferable that a certain interval is provided between the shifted leg-around elastic members. Although the space | interval is not specifically limited, It is preferable that it is 0.5-10 mm, and it is still more preferable that it is 1-5 mm.

  Furthermore, in the underpants type diaper of the present invention, it is necessary to dispose at least one place by shifting the position of the end portion of the leg elastic member. Since it is “at least one place”, the end position of the elastic material around the legs may be shifted by only one position, or may be shifted by two or more positions. For example, the pants-type diaper 1 shown in FIG. 2 is arranged by shifting the end positions 12a and 12b of the two leg-around elastic members 12 located on the lower side of the diaper. It can be said that the positions 12a and 12b are shifted by two places.

  However, the pant-type diaper of the present invention includes a plurality of leg-around elastic members 12, such as a pant-type diaper 50 shown in FIG. 4 and a pant-type diaper 60 shown in FIG. In the joint part 14, the end position 12 a on the front body 2 side of the leg-surrounding elastic member 12 and the end position 12 b on the rear body 6 side of the leg-surrounding elastic member 12 are arranged in the vertical direction of the diaper at all points. Those which are shifted to each other are preferable. This is because the more the parts where the end positions of the leg-surrounding elastic materials do not match, the more the feeling of wearing and fitting at the leg-surrounding opening is improved.

  Further, in the pant-type diaper 1 shown in FIG. 2, an example in which three leg-around elastic members 12 are arranged is shown. However, in the pant-type diaper of the present invention, at least one is provided on each of the front body side and the back body side. As long as this is arranged, there is no particular limitation on the number of the elastic members around the legs. Moreover, although it is normal that it is left-right symmetric about the shape of a leg elastic | stretch material, an arrangement position, the number of arrangements, etc., these are also included in the scope of the present invention.

  Furthermore, in the underpants type diaper of the present invention, it is not necessary that the number of arrangements of the leg-surround stretchable material on the front body side and the leg-surround stretchable material disposed on the back body side are the same. For example, a pant-type diaper 60 shown in FIG. 5 has two leg-around elastic members 12 on the front body 2 side and three leg-around elastic members 12 on the back body 6 side. The example from which the arrangement number of the leg periphery elastic material arrange | positioned at the side differs is shown. However, in consideration of the point that the tightening degree around the legs is constant on the front body side and the back body side, which is more comfortable to wear and effective in preventing leakage, the pants-type diaper 1 shown in FIG. Like the pant-type diaper 50 shown in FIG. 4 and the pant-type diaper 70 shown in FIG. 6, the number of arrangements of the leg-surround stretchable material 12 on the front body 2 side and the leg-surround stretchable material 12 disposed on the back body 6 side are the same. Preferably there is.

  Moreover, the underpants type diaper of the present invention includes a plurality of leg-around elastic members 12, such as the underpants type diaper 50 shown in FIG. 4 and the underpants type diaper 60 shown in FIG. In the joint portion 14, the end position 12 a on the front body 2 side of the leg-surrounding elastic member 12 and the end position 12 b on the rear body 6 side of the leg-surrounding elastic member 12 are alternately directed in the vertical direction of the diaper. Those arranged in the above are preferable. Such an arrangement has an advantage that skin troubles caused by rubbing against the skin and the like are reduced because the contact portions between the base of the legs and the elastic material around the legs are distributed almost evenly.

  However, it is not always necessary to alternately dispose the end position on the front body side and the end position on the back body side of the leg stretchable material. For example, a pant-type diaper 70 shown in FIG. 6 has three leg-around elastic members 12 arranged on the front body 2 side and three leg-around elastic members 12 on the rear body 6 side along the leg-hole opening 10. The end positions 12a and 12b of the surrounding elastic members 12 are arranged in the order of the back body 6 side, the back body 6 side, the front body 2 side, and the front body 2 side from the lower side of the diaper to the upper side. This is an example that is not arranged.

  Considering the above, like the pant-type diaper 50 shown in FIG. 4, a leg provided with a plurality of leg-surrounding elastic members 12 and arranged on the leg-surrounding elastic member 12 on the front body 2 side and the back body 6 side. The number of the surrounding elastic members 12 is the same, and at the joint portion 14 between the front body 2 and the back body 6, the end position 12a on the front body 2 side of the leg surrounding elastic material 12 and the rear elastic material 12 behind The end position 12b on the body 6 side is arranged so as to be shifted in the vertical direction of the diaper at all locations, and further, the end position on the front body 2 side of the leg-surrounding stretchable material 12 and the leg-surrounding stretchable material 12 A form in which the end positions on the back body 6 side are alternately arranged in the vertical direction of the diaper is particularly preferable.

  As the elastic material around the legs, it is preferable to use a material having an elongation ratio in the range of 130 to 500% when the non-stretched state is 100%, and a material having an elongation ratio in the range of 200 to 300%. Is more preferable. By using a material having an elongation rate in the range of 130 to 500%, the leg-surrounding stretchable material can expand and contract following the movement of the wearer. Therefore, it becomes difficult to form a gap around the legs, and urine leakage from around the legs can be effectively prevented. On the other hand, when a material having an elongation rate of less than 130% is used, the elastic force of the elastic material around the legs tends to be insufficient, so that a gap is easily formed around the legs and the wearer wears a diaper. In addition, it is difficult to sufficiently open the opening around the leg, which may make it difficult to wear the diaper. In addition, when a material having an elongation rate exceeding 500% is used, not only the diaper is difficult to wear because the opening around the leg is reduced more than necessary, but the skin around the wearer's leg is too tight and the skin becomes red. There is a risk of skin troubles such as becoming.

  As long as these conditions are satisfied, the constituent material and shape are not particularly limited. For example, thread rubber or flat rubber made of an elastic material such as natural rubber or synthetic rubber (urethane rubber, etc.), or a stretchable film is used. Can be mentioned. Among these, thread rubber or flat rubber is preferable. The thickness of the rubber thread is preferably 310-3730 decitex, and more preferably 470-1240 decitex. The flat rubber preferably has a width of 0.5 to 5.0 mm, more preferably 0.8 to 3.0 mm. The thickness of the flat rubber is preferably 0.1 to 1.0 mm, more preferably 0.2 to 0.5 mm.

  In addition, when using a plurality of leg-around elastic members, the thickness, the elongation rate, and the like may be appropriately set from the above range according to the purpose, and it is not necessary to use the same material for all.

  Usually, the leg-stretchable material is fixed to an exterior member or the like by an adhesive or other means. As a fixing method, for example, a hot melt adhesive, starch-based or water-soluble glue such as carboxymethylcellulose (CMC), and other adhesives with high fluidity may be used. It may be welded by sound waves or the like.

[2] Overall configuration of pants-type diapers:
Hereinafter, configurations other than the leg-holes stretchable material of the pant-type diaper of the present invention will be described. The underpants type diaper of the present invention is formed with the front body 2, the crotch 4, and the back body 6, as in the pant diaper 1 shown in FIG. 2. In this specification, “front body” means the part that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and “inseam” means that the wearer wears a diaper. In this case, it means a part covering the inseam of the wearer, and “rear body” means a part covering the back side (back of the body) of the wearer when the diaper is worn on the wearer.

  A pant-type diaper usually produces a flat diaper intermediate 40 as shown in FIG. 3, and corresponding side edges of the front body 2 and back body 6 (that is, side edge 2a and side edge). It is manufactured by joining the part 6a, the side edge 2b and the side edge 6b). By performing such joining, a joint 14 between the front body 2 and the back body 6 is formed as in the pant-type diaper 1 shown in FIG. 2, thereby forming one waist opening 8 and a pair of legs. The pants-type diaper 1 in which the surrounding opening 10 is formed can be obtained.

  As a form of joining, like the underpants type diaper 100 shown in FIG. 1, the side edges of both the front body 2 and the back body 6 may be joined in a state protruding from the diaper, or the front body These side edges may be joined to the surface of the back body, and the side edges of the back body may be laminated to the front body surface. The joining is usually performed by heat sealing, but may be joined using a hot melt adhesive, ultrasonic melting, or the like, or may be joined by appropriately combining these methods.

  As already described, the pant-type diaper of the present invention is provided with an elastic material around the leg arranged along the leg-hole opening as an essential component, and further, like the pant-type diaper 1 shown in FIG. In general, a configuration including a waist elastic member 20 disposed along the waist opening 8 is generally used. It is preferable to provide the elastic material 20 around the waist because the fit of the diaper to the wearer is good and the diaper is prevented from sliding down. Moreover, the structure provided with the some elastic | strength elastic material 11 arrange | positioned along a wearer's belly circumference like the underpants type diaper 100 shown in FIG. When the abdominal circumference stretchable material 11 is provided, a stretchable abdominal circumference gather can be formed around the wearer's abdomen, and the diaper fit and sliding prevention effect can be further improved. In addition, about the constituent material and shape of a waist circumference elastic material or an abdominal circumference elastic material, the structure similar to a leg circumference elastic material is employable.

  A pants-type diaper needs to have both an absorption / holding function for absorbing and holding a wearer's excrement and a wearing function for encapsulating the wearer's body. And as a specific form of the pants-type diaper, the absorbent pad responsible for the absorption / holding function is configured as a separate body separated from the exterior member responsible for the mounting function (in this specification, “ The absorbent body responsible for the absorption / holding function is interposed (built in) between the top sheet and / or the back sheet responsible for the mounting function, and these are integrally configured. In this form (referred to herein as “integrated”). The underpants type diaper of the present invention can be applied to any form thereof.

[3] Configuration of a two-piece pant diaper:
First, the configuration of a two-piece pant diaper will be described. FIG. 3 is a partially cut-out plan view showing an example of a diaper intermediate body of a two-piece pants-type diaper. Like the diaper intermediate 40 shown in FIG. 3, the two-piece pant diaper includes a sheet-like exterior member 18 that forms the front body 2, the crotch 4, and the back body 6, and the exterior member 18. And an absorbent pad 16 disposed on the crotch part 4. And the absorption pad 16 is comprised from the liquid-permeable surface sheet 22, the liquid-impermeable back surface sheet 24, and the absorber 26 interposed between both sheets. In addition, semicircular cutout portions 32 are formed on both sides of the crotch portion 4 of the exterior member 18.

  Corresponding side edges of the front body 2 and back body 6 of such a diaper intermediate body 40 (that is, side edge 2a and side edge 6a, side edge 2b and side edge 6b), that is, exterior members By joining 18 side edges, the joint between the front body 2 and the back body 6, one waist opening (derived from the upper and lower edges of the diaper intermediate 40), and a pair of legs A pants-type diaper in which an opening (derived from the notch 32 of the diaper intermediate 40) is formed can be obtained. Such a two-piece pants-type diaper can be manufactured by a method in which the exterior member and the absorbent pad are separately manufactured and then the absorbent pad is attached to the crotch portion of the exterior member, and therefore, the manufacture is easy. There is an advantage of being. Moreover, since the area which a wearer's skin is covered with a back surface sheet can be reduced compared with the integral type underpants type diaper mentioned later, there also exists a merit that the stuffiness inside a diaper can also be relieved.

[3-1] Exterior member:
In this specification, the term “exterior member” means a sheet-like member that forms the front body, the crotch part, and the back body. That is, in a two-piece pants-type diaper, the exterior member bears a mounting function for encapsulating the wearer's body.

  In the two-piece pants-type diaper, the absorbent pad serves exclusively to absorb and retain the excrement of the wearer. Therefore, the liquid-impermeable material is used as a material for the exterior member. There is no need to use. Examples of the material constituting the exterior member include a nonwoven fabric composed of synthetic fibers made of polyethylene, polypropylene, polyester, and other thermoplastic resins. And as an exterior member, it forms normally by bonding together 2 or more nonwoven fabrics. When two or more non-woven fabrics are bonded together, the same material and basis weight may be bonded, or a plurality of types of non-woven fabrics having different materials and basis weights may be bonded. In the diaper intermediate 40 shown in FIG. 3, the exterior member 18 is composed of two nonwoven fabrics, and the leg elastic members 12, the waist elastic material 20, and the belly elastic material 11 are disposed between the two nonwoven fabrics. It is an example.

[3-2] Absorption pad:
In the present specification, the term “absorbent pad” means a small absorbent article that is arranged as a separate body separated from the exterior member and is disposed at least in the crotch portion of the exterior member (“absorbent body”). Sometimes called). That is, in the two-piece type pants-type diaper, the absorption pad absorbs and retains the excrement of the wearer and bears an absorption / retention function. The absorbent pad is generally composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between the two sheets. The absorbent pad can be fixed to the exterior member using, for example, a hot melt adhesive. At this time, the absorbent pad may be fixed (adhered) to the crotch portion of the exterior member at both side edges (the left and right side edges of the pad in FIG. 3). In other words, the upper and lower edges of the pad) may be fixed to the front body and the back body of the exterior member.

[3-2A] Top sheet:
A surface sheet is a sheet | seat arrange | positioned among the sheets which comprise the outer surface of an absorption pad at the contact surface side with a wearer's skin. Since the top sheet needs to absorb the excrement of the wearer by the absorber disposed on the lower surface side thereof, at least a part of the top sheet is made of a liquid-permeable material that can permeate the excrement of the wearer.

  Examples of the liquid permeable material constituting the surface sheet include a woven fabric, a nonwoven fabric, and a porous film. Especially, it is preferable that it is the nonwoven fabric comprised from the synthetic fiber. Examples of the synthetic fiber include resins composed of components such as polypropylene, polyethylene, polyester, nylon, etc., and may be a single fiber composed of only one of these components, or composed of two or more components. It may be a composite fiber. Of these, polyester / polypropylene, polyester / polyethylene, and polypropylene / polyethylene composite fibers are preferred because of their high strength. There is no restriction | limiting in particular also about the kind of nonwoven fabric, The conventionally well-known nonwoven fabric manufactured by various manufacturing methods, such as air through (card hot air), card | curd embossing, and a spun bond, can be used suitably.

[3-2B] Back sheet:
A back surface sheet is a sheet | seat arrange | positioned among the sheets which comprise the outer surface of an absorption pad at the contact surface side with an exterior member. Since the back sheet needs to prevent the excrement of the wearer from leaking outside the diaper, at least the vicinity of the lower surface of the absorber is made of a liquid-impermeable material.

  Examples of the liquid-impermeable material constituting the back sheet include a liquid-impermeable film made of a synthetic resin such as polyethylene. Moreover, in order to prevent the inside of a diaper from being steamed, it is also one of the preferable forms to use a liquid-impermeable film with moisture permeability. Examples of the liquid-impermeable film with moisture permeability include a microporous polyethylene film produced by adding a filler such as calcium carbonate to a polyethylene resin, kneading, extruding, and then stretching. . This microporous polyethylene film is a water-repellent sheet that has a large number of fine pores of 0.1 to several μm and allows moisture and gas to pass therethrough but does not allow water to pass within the water pressure resistance.

[3-2C] Absorber:
An absorber is a member for absorbing and holding a wearer's excrement, and is interposed between both the above-mentioned sheets (namely, a surface sheet and a back sheet). The absorbent body is made of an absorbent material because it needs to absorb and hold the excrement of the wearer.

  Examples of the absorbent material constituting the absorbent body include pants-type diapers and other conventionally known absorbent materials usually used for absorbent articles, such as fluff pulp (cotton pulp), super absorbent polymer (Super Absorbent). Polymer; hereinafter referred to as “SAP”), hydrophilic sheets and the like.

As the fluff pulp, for example, a pulp sheet having a fiber length of 5 mm or less can be suitably used by defibrating a pulp sheet with a pulverizer. The pulp sheet used at this time may be a chemical pulp sheet or a mechanical pulp sheet, and the pulp raw material is not particularly limited as long as it is used as a normal pulp raw material, such as softwood, hardwood, straw, bamboo, kenaf, waste paper, etc. Can be used. The amount of fluff pulp used is generally 50 to 400 g / m ² , although it varies depending on the structure of the absorber.

  As SAPs, starch-based, cellulose-based, and synthetic resin-based SAPs are known, and any of these may be used. Specifically, starch-acrylic acid (salt) graft copolymer, saponified starch-ethyl acrylate graft copolymer, saponified starch-methyl methacrylate graft copolymer, starch-acrylonitrile graft copolymer Saponified product of starch, acrylamide saponified graft copolymer, polyacrylic acid (salt), polyethylene oxide crosslinked with acrylic acid, crosslinked product of sodium carboxymethyl cellulose, crosslinked product of polyvinyl alcohol-maleic anhydride Can be used. Among these, it is preferable to use sodium polyacrylate having a high absorption performance capable of absorbing water 20 times or more of its own weight.

Examples of the hydrophilic sheet include tissue, absorbent paper, and non-woven fabric subjected to hydrophilic treatment. Especially, it is preferable to use the thing in the range whose basic weight is 10-30 g / m < ² >.

  These absorbent materials are usually used as a single-layer or multi-layer mat. Under the present circumstances, 1 type may be used independently among the said absorptive materials, and 2 or more types may be used together. Among these, those mainly composed of fluff pulp and combined with SAP are preferable. At this time, the SAP may be uniformly mixed in each mat of fluff pulp, or may be arranged in layers between the layers of the multilayer fluff pulp. The amount of SAP is preferably 10 to 500 parts by mass and more preferably 15 to 300 parts by mass with respect to 100 parts by mass of the dried fluff pulp. By using this amount, SAP particles have minimal interference with each other, so that the particles do not form a permeation barrier, and excrement can permeate and absorb in three dimensions. It becomes.

  In addition, in the underpants type diaper of this invention, it is preferable to set it as the structure which wraps the whole absorber with a hydrophilic sheet. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

  As the shape of the absorbent body, for example, any shape can be adopted as long as it is a shape normally used for a conventional pants-type diaper, such as a rectangular shape or a gourd shape, and other absorbent articles. Moreover, although the thing of a left-right symmetrical shape is normally used for an absorber, it is not specifically limited to such a thing, A right-left asymmetrical shape may be sufficient.

  In addition, you may arrange | position the sheet | seat for diffusing liquids, such as excrement, incidentally on the upper surface side (for example, between an absorber and a surface sheet) to an absorber. In the present specification, such a sheet is particularly referred to as a “second sheet”. When this second sheet is attached, due to the posture of the wearer, etc., even if the space on the lower surface side of the topsheet is not sufficiently formed, the absorption rate of excrement etc. is difficult to decrease, and excretion due to a decrease in the absorption rate It becomes possible to prevent leakage of objects.

  Examples of the material constituting the second sheet include hydrophilic and liquid-permeable materials such as woven fabric, non-woven fabric, porous plastic, and fluff pulp. Examples of these constituent materials include polypropylene, polyethylene, polyester, rayon, pulp, and composite fibers thereof. As the pulp, crimped fibers such as curly cellulose fibers can be suitably used.

[3-2D] Solid gathering:
You may arrange | position a solid gather along the both-sides edge in an absorption pad. This three-dimensional gather effectively prevents leakage of the excrement of the wearer to the outside of the diaper, particularly leakage from the crotch.

  As the material constituting the three-dimensional gather, the liquid-permeable material exemplified in the section of the surface sheet can be used, but a water-repellent material is preferably used in order to improve leakage prevention. Non-woven fabrics such as spunbond and card embossing can be used as the water-repellent material. However, SMS (spunbond / meltblown / spunbond), SMMS (spunbond / meltblown / meltblown / It is preferable to use a nonwoven fabric such as spunbond. Alternatively, a liquid-impermeable material obtained by bonding a plastic film to a liquid-permeable material or a water-repellent material may be used.

  Note that the three-dimensional gather may be formed by folding back the top sheet and the back sheet of the absorbent pad, or may be formed by bonding completely separate members. For example, the diaper intermediate 40 shown in FIG. 3 is an example in which the three-dimensional gathers 28 are formed of a water-repellent nonwoven fabric that is a separate member from the top sheet 22 and the back sheet.

  This three-dimensional gather is usually arranged over the entire area of both side edges of the absorbent pad 16 as in the diaper intermediate 40 shown in FIG. 3, but at least the lower crotch is used for the purpose of preventing leakage from the crotch. It suffices if they are arranged. In addition, although it is preferable to arrange | position at least one pair of three-dimensional gathers along the both-sides edge of an absorption pad, you may arrange | position two or more pairs.

  The height of the three-dimensional gather is preferably 5 to 80 mm, and more preferably 10 to 40 mm. In addition to being able to ensure a sufficient leak-proof effect by setting it to 5 mm or more, by setting it to 80 mm or less, the three-dimensional gather covers the absorbent pad surface to inhibit the absorption effect, or the three-dimensional gather is stretched around the legs. It can flow out to the outside of the material and become a flow path to the outside of the diaper of excrement, thereby preventing a problem that causes leakage.

  On the other hand, when the height of the three-dimensional gather exceeds 80 mm, the three-dimensional gather covers the surface of the absorbent pad, which may cause a leakage trouble. In addition, when the three-dimensional gather protrudes outside the diaper beyond the elastic material around the legs, a void (hole) is formed in that portion, and a flow path to the outside of the diaper of excreta is formed, so urine May cause leakage.

  The three-dimensional gather may be an inward gather that tilts toward the inside of the diaper, or may be an outward gather that tilts toward the outside of the diaper. Moreover, it can also be set as the three-dimensional gathers (C fold gather, Z fold gather, etc.) which formed the bending part and the folding | turning part in a part of height direction. For example, the diaper intermediate 40 shown in FIG. 3 is an example in which the three-dimensional gather 28 is turned over to make a gather.

  The diaper intermediate 40 shown in FIG. 3 shows an example in which the shape, height, arrangement position, number of arrangements, etc. of the three-dimensional gathers 28 are bilaterally symmetric, but those that are bilaterally asymmetric are also within the scope of the present invention. included.

  It is preferable to attach a three-dimensional gather elastic material to the three-dimensional gather. As a three-dimensional gather elastic material, the thing similar to the leg elastic material already described can be used. One or more three-dimensional gather elastic materials may be arranged for one three-dimensional gather. When a plurality of three-dimensional gather stretchable materials are arranged, the thickness, elongation rate, and the like may be set as appropriate according to the purpose, and it is not necessary to use the same material.

  The arrangement position of the three-dimensional gather elastic material is not particularly limited, and may be arranged at the upper end of the three-dimensional gather, may be arranged near the standing line of the three-dimensional gather, or the upper end of the three-dimensional gather and the standing line. (Specifically, it may be disposed between a bent part or a folded part of a C-folded gather or a Z-folded gather). For example, the diaper intermediate 40 shown in FIG. 3 is an example in which the upper end portion of the three-dimensional gather 28 is folded, and the three-dimensional gather stretchable material 30 is disposed at the folded portion.

[4] Configuration of integrated pants-type diaper:
Next, the structure of the integrated pants-type diaper will be described. The integrated pants-type diaper includes a top sheet, a back sheet, and an absorber interposed in at least a part between both sheets. And each part of a front body, a crotch part, and a back body is formed of the surface sheet and / or the back sheet. That is, in the integrated pants-type diaper, the top sheet and / or the back sheet has a mounting function for encapsulating the wearer's body, and an absorbent body that has an absorption / holding function between these two sheets. It is interposed (built-in) and configured integrally.

  An integrated pant diaper can also be manufactured by the same method as a two-piece pant diaper. That is, a laminate comprising a top sheet, a back sheet, and an absorbent body interposed between at least a part of the two sheets, a flat diaper intermediate having a structure according to the diaper intermediate 40 shown in FIG. The body and corresponding side edges of the front body and the back body, that is, by joining the side edges of the topsheet and / or the backsheet, the joint between the front body and the backbody, one A pants-type diaper having a waist opening and a pair of leg openings can be obtained.

  The integrated pants-type diaper can be configured according to a two-piece pants-type diaper, except that the top sheet, the absorber and the back sheet do not constitute a separate (independent) absorbent pad. . Accordingly, in the following description, the same configuration as that of the two-piece pant diaper is omitted, and only a configuration that is different from the two-piece pant diaper, that is, a configuration peculiar to the one-piece pant diaper is referred to. I will do it.

[4-1] Top sheet:
The surface sheet in an integral-type underpants type diaper is a sheet | seat arrange | positioned at the contact surface side with a wearer's skin. About this surface sheet, the structure similar to the surface sheet of the absorption pad already described is employable. The surface sheet needs to absorb the wearer's urine and body fluid to the absorbent body disposed on the lower surface side thereof, so that at least a part (usually near the upper surface of the absorber) transmits the wearer's urine and body fluid. It is comprised by the liquid-permeable material which can be made. In other words, as long as at least a part is made of a liquid-permeable material, the entire surface sheet does not necessarily need to be made of a liquid-permeable material.

  In the integrated pants-type diaper, the entire contact surface with the wearer's skin may be constituted by a single surface sheet, or may be constituted by a plurality of surface sheets. For example, the central part of the diaper in which the absorbent body is disposed and the portions projecting on both sides thereof (sometimes referred to as side flaps) may be constituted by different surface sheets (each surface sheet is “center” Sheet "or" side sheet "). As described above, when a plurality of surface sheets are provided, each surface sheet may be composed of the same material or material, or may be composed of different materials or materials. For example, a configuration in which the center sheet is made of a liquid-permeable material and the side sheet is made of a water-repellent material is often used.

[4-2] Back sheet:
A back sheet is a sheet | seat arrange | positioned at the contact surface side with clothing. Since it is necessary to prevent the excrement of the wearer from leaking outside the diaper, the back sheet is made of a liquid-impermeable material at least near the lower surface of the absorber. For example, the form etc. which comprise the part corresponding to the center sheet | seat of a surface sheet with a liquid-impermeable material are used well.

  In the integrated pants-type diaper, a sheet made of a material different from the back sheet may be bonded to the outer surface side of the back sheet (sometimes referred to as a “cover sheet”). By this cover sheet, an effect of reinforcing the back sheet and an effect of improving the touch (tactile feeling) of the diaper can be imparted. Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Among these, dry nonwoven fabrics and wet nonwoven fabrics made of thermoplastic resins such as polyethylene, polypropylene, and polyester can be suitably used.

[4-3] Absorber:
In the integrated pants-type diaper, the absorbent body is interposed between at least a part of the two sheets described above (that is, the top sheet and the back sheet). More specifically, the absorbent body may be interposed at least in the crotch region, and the absorbent body may extend to the abdomen and back. Since the absorbent body needs to absorb and retain the excrement of the wearer, the absorbent body is constituted by the absorbent material described above.

[4-4] Solid gathering:
It is preferable to arrange at least a pair of three-dimensional gathers at least in the crotch part along the longitudinal direction of the diaper in the integrated pants-type diaper.

  In the integrated pants-type diaper, the three-dimensional gather may be formed by folding a surface sheet such as a center sheet or a side sheet. However, the three-dimensional gather is preferably made of a water-repellent or liquid-impermeable material from the viewpoint of ensuring leakage resistance. For example, it is also a preferred embodiment that the side sheet is made of a water-repellent material and the side sheet is folded to form a three-dimensional gather. The three-dimensional gather may be formed by folding back a member other than the top sheet such as the back sheet, or may be formed by bonding completely separate members.

  In an integrated pants-type diaper, in order to prevent leakage from the crotch part, it is sufficient that a three-dimensional gather is disposed at least in the crotch part, but it may be disposed in the front body or the back body. In addition, a pair of solid gathers is usually arranged, but two or more pairs may be arranged.

[5] Manufacturing method:
Hereinafter, an example of a method for producing the pant diaper of the present invention will be described with reference to an example of continuously producing a two-piece pant diaper. Similar to the diaper intermediate body 40 shown in FIG. 3, the two-piece pants-type diaper is composed of two pieces, an absorbent pad 16 and an exterior member 18. And such a 2 piece type underpants type diaper is from the "diaper continuous body" which exhibits the structure where the diaper intermediate body 40 shown in FIG. 3 was continuously arrange | positioned toward the left-right direction of drawing. Can be manufactured. Hereinafter, description will be given with reference to FIG.

  The absorption pad 16 shown in FIG. 3 can be obtained by the following method. First, an absorbent pad continuous body in which a plurality of absorbent pads 16 are continuously arranged in the longitudinal direction is manufactured. Specifically, a plurality of absorbent bodies wrapped in a hydrophilic sheet are intermittently arranged on the upper surface of a long sheet material (back sheet material) to be a back sheet along the longitudinal direction of the back sheet material. To do. Further, a long sheet material (surface sheet material) to be the surface sheet 22 is arranged on the upper surface, and the periphery of each absorber is sealed so as to be sandwiched between the back surface sheet material and the surface sheet material. By doing so, an absorbent pad continuum in which a plurality of absorbent pads 16 are continuously arranged in the longitudinal direction can be obtained.

  In parallel with the above process, the three-dimensional gathers 28 shown in FIG. Specifically, a separate sheet material in which the three-dimensional gather stretchable material 30 is sandwiched between the folded portions is prepared in advance, and the separate sheet material is formed on both side edges (shown in FIG. 3) of the absorbent pad continuous body. The three-dimensional gathers 28 are attached by bonding to the left and right sides of the absorbent pad 16.

  Finally, the absorbent pad continuum is separated at the gaps between the absorbent bodies (portions sealed by the back sheet material and the top sheet material) to obtain a plurality of individually separated absorbent pads 16. In this way, it is possible to obtain a plurality of absorbent pads 16 composed of the top sheet 22, the back sheet, and the absorbent body interposed between the two sheets.

  Apart from this, an exterior member continuous body in which a plurality of exterior members 18 are continuously arranged in the longitudinal direction is manufactured. First, two long nonwoven fabrics to be the exterior member 18 are prepared, and the waist elastic material 20, the belly elastic material 11 and the leg elastic material 12 are continuously stretched on the upper surface of one of these nonwoven materials. (In the case of the diaper intermediate 40 shown in FIG. 3, each elastic material is continuously arranged in the lateral direction of the drawing). At this time, when the front body 2 and the back body 6 of the exterior member 18 are joined to each other, the leg-hole stretch material 12 is connected to the front-body 2 side end portion and the back-body 6 side end portion of the leg-hole stretch material 12. The position is arranged so as to be shifted in at least one place in the vertical direction of the diaper. And by laminating and fixing another nonwoven fabric on this upper surface, the waist elastic material 20, the belly elastic material 11 and the leg elastic material 12 are interposed between the two nonwoven materials, An exterior member continuum in which a plurality of exterior members 18 are continuously arranged in the longitudinal direction (the lateral direction in the drawing in FIG. 3) can be obtained.

  The plurality of absorbent pads 16 are intermittently arranged and fixed at predetermined intervals with respect to the exterior member continuous body obtained as described above. At this time, the absorbent pad 16 is arranged so that the longitudinal direction thereof is orthogonal to the direction in which the exterior member continuous body is formed (the lateral direction in the drawing in FIG. 3). Thereafter, a plurality of diaper intermediate bodies 40 are continuously arranged by punching the gap portions of the plurality of absorbent pads 16 in the exterior member continuum along the leg elastic members 12 to form a substantially circular opening. A diaper continuum having a structured structure is obtained. In addition, the said opening part becomes the notch part 32 of the diaper intermediate body 40 later, and by extension, the leg periphery opening part of a pants-type diaper.

  The diaper continuous body is folded in half so that the front body 2 and the back body 6 are aligned with the absorbent pad 16 inside, and the front body 2 and the back body 6 are formed in the gaps between the plurality of absorbent pads 16. Are joined by means such as heat sealing to form a joined portion. By separating the diaper continuous body along the joint, a plurality of individually separated pant-type diapers are obtained. In this way, the corresponding side edges of the front body 2 and the back body 6 are joined together (that is, the side edge 2a and the side edge 6a, the side edge 2b and the side edge 6b), and the front body 2 And the back body 6, one waist opening (derived from the upper and lower edges of the diaper intermediate 40), and a pair of leg openings (derived from the notch 32 of the diaper intermediate 40). Pants-type diapers in which a) is formed.

  The pants-type diaper of the present invention can be used as an infant diaper or an adult diaper such as an elderly person or a disabled person who needs care. The pants-type diaper of the present invention is particularly suitable as an adult diaper having a large individual difference in the size of the leg circumference because the wear feeling and fit at the opening around the leg are good and the leakage prevention effect is excellent. Can be used.

It is a perspective view which shows the general structure of a pants-type diaper. It is a schematic perspective view which shows one Embodiment of the underpants type diaper of this invention, and shows the state seen from the side of the diaper. It is a top view which shows the example of a diaper intermediate body, expand | deploys a diaper intermediate body and shows the state seen from the absorption pad side. It is a schematic perspective view which shows another embodiment of the underpants type diaper of this invention, and shows the state seen from the side of the diaper. It is a schematic perspective view which shows another embodiment of the underpants type diaper of this invention, and shows the state seen from the side of the diaper. It is a schematic perspective view which shows another embodiment of the underpants type diaper of this invention, and shows the state seen from the side of the diaper.

Explanation of symbols

1: pants-type diaper, 2: front body, 2a, 2b: side edge, 4: crotch, 6: back body, 6a, 6b: side edge, 8: waist opening, 10: leg opening 11: Stretch material around the abdomen, 12: Stretch material around the leg, 12a: End position (on the front body side of the leg stretch material), 12b: End position (on the back body side of the leg stretch material), 14 : Joint, 16: Absorption pad, 18: Exterior member, 20: Elastic material around waist, 22: Surface sheet, 28: Solid gather, 30: Solid gather stretchable material, 32: Notch, 40: Diaper intermediate, 50, 60, 70, 100: Pants-type diapers.

Claims (4)

Consists of front body, crotch and back body parts, corresponding side edges of the front body and the back body are joined together, a joint between the front body and the back body, one waist opening A pants-type diaper in which a part and a pair of leg-hole openings are formed,
Further comprising a leg circumference elastic member disposed along the leg circumference opening,
A pants-type diaper in which the end position on the front body side and the end position on the back body side of the elastic material around the legs are shifted in the vertical direction of the diaper at the joint. A sheet-like exterior member that forms each part of the front body, the crotch part, and the back body, and an absorbent pad disposed on at least a part of the crotch part of the exterior member;
The absorbent pad is composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between both sheets,
The pants-type diaper according to claim 1, wherein side edges of the exterior member are joined to each other to form the joint, one waist opening, and a pair of leg openings. A top sheet, a back sheet, and an absorber interposed in at least a part between both sheets,
Each part of the front body, the crotch part and the back body is formed by the top sheet and / or the back sheet,
The underpants type diaper according to claim 1, wherein side edges of the topsheet and / or the backsheet are joined to form the joint, one waist opening, and a pair of leg openings. A plurality of elastic materials around the legs,
Any one of claims 1 to 3, wherein in the joint portion, the end part position on the front body side and the end part position on the back body side of the elastic material around the leg are shifted in the vertical direction of the diaper at all points. The pants-type diaper according to claim 1.

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