JP2007061462A - Tape type disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape type disposable diaper where side flaps for a back section and those for a front section have functions proper to the respective side flaps and which can be manufactured at low costs by producing both of the flaps with different sheet materials from each other. <P>SOLUTION: The tape type disposable diaper 1 is provided with: a diaper main body 8 having a front face sheet 2, a rear face sheet 3 and an absorber 4 interposed to at least a part of a space between both of the sheets; and fastening tapes 7 for wearing. The disposable diaper is composed of the front section 23, a crotch part 22 and a back section 21. The disposable diaper is moreover provided with the side flaps (the side flaps for the back section) 5 arranged at both of the side edges of the back section 21 and the side flaps (the side flaps for the front section) 6 arranged at both of the side edges of the front section 23. The side flaps 5 for the back section and the side flaps 6 for the front section are composed of different sheet members from each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tape-type disposable diaper. More specifically, the side flaps of the back body and the side flaps of the front body are made of different sheet materials, and are suitable for the function of each side flap. The present invention relates to a possible tape-type disposable diaper.

  Generally, a tape-type disposable diaper is basically composed of a top sheet, a back sheet, and an absorbent body interposed between the two sheets, and fastening tapes are arranged on both side edges of the back body of the diaper main body. A front patch for fastening the above fastening tape is placed on the outer surface of the front body, and various forms have been proposed according to its use, and it is widely used from infants to adult incontinent persons. ing.

  Furthermore, it has a side flap integrated with the back body and the front body, and is formed so that both side edges of the back body and the front body extend toward the outer side of the diaper. Tape-type disposable diapers in which the above-mentioned fastening tape is disposed on both side edges are widely used. Thus, when the side flap is formed integrally with the diaper main body, it is necessary to cut off and discard a part of the side edge portion of the crotch part that does not have the side flap. This method has a problem that the portion to be discarded is wasted and the cost is increased.

On the other hand, a tape-type disposable diaper in which a side flap is disposed as a separate member from a diaper main body (rear body) is proposed in a diaper main body including a top sheet, a back sheet, and an absorber (for example, , See Patent Document 1).
Japanese Patent No. 3670289

  The tape-type disposable diaper described in Patent Document 1 has a side flap as a separate member from the diaper main body, and when the diaper is attached to the wearer, one of the side flaps of the back body and the front body is around the leg. And it is comprised so that it may contribute to the improvement of the fit property of the waist. In this way, by making the side flaps a separate member from the diaper body, only the necessary members can be used in the production of the diaper. is there. However, the side flaps themselves are insufficient from the viewpoint of diaper comfort and cost reduction.

  The present invention has been made to solve the above-described problems of the prior art, and the side flaps of the back body and the side flaps of the front body are made of different sheet materials. The present invention provides a tape-type disposable diaper that is suitable for function and can be manufactured at low cost.

  In order to solve the above conventional problems, the present invention provides the following tape-type disposable diaper.

[1] A diaper body having a top sheet, a back sheet, and an absorbent body interposed between at least a part of the two sheets, and a fastening tape for mounting, and includes a front body, a crotch part, and a back body A tape-type disposable diaper comprising a side flap (rear body side flap) disposed on both side edges of the rear body and a side flap (front body side disposed on both side edges of the front body) A tape-type disposable diaper, wherein the rear body side flap and the front body side flap are made of different sheet materials.

[2] The tape-type disposable diaper according to [1], wherein a basis weight of the rear body side flap is larger than a basis weight of the front body side flap.

[3] The tape-type disposable diaper according to [1] or [2], wherein the breaking strength of the rear body side flap is larger than the breaking strength of the front body side flap.

[4] The tape-type disposable diaper according to any one of [1] to [3], wherein the basis weight of the front body side flap is 10 to 45 g / m ² .

[5] The tape-type disposable diaper according to any one of [1] to [4], wherein a weight of the rear body side flap is 30 to 70 g / m ² .

[6] The tape-type disposable diaper according to any one of [1] to [5], wherein the sheet material constituting the rear body side flap and the front body side flap is a nonwoven fabric.

  The tape-type disposable diaper of the present invention is composed of different sheet materials for the rear body side flap and the front body side flap, and therefore has the characteristics required for the rear body side flap and the characteristics required for the front body side flap. While satisfying each, it can be an inexpensive diaper.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the present invention will be specifically described. However, the present invention is not limited to the following embodiment, and is within the scope of the present invention without departing from the spirit of the present invention. It should be understood that design changes, improvements, and the like can be made as appropriate based on the knowledge.

  FIG. 1 is a partially cut-out development plan view of a tape-type disposable diaper 1 according to the present invention as viewed from the surface sheet 2 side. In FIG. 1, a tape-type disposable diaper (hereinafter simply referred to as “diaper”) 1 includes a diaper body 8 having a top sheet 2, a back sheet 3, and an absorbent body 4 interposed between the two sheets. The whole diaper can be divided into a back body 21, a crotch 22 and a front body 23. And the side flap (rear body side flap) 5 arrange | positioned at the both-sides edge part of the back body 21 and the side flap (front body side flap) 6 arrange | positioned at the both-sides edge part of the front body 23 are further provided. Fastening tapes 7 are arranged on both side edges of the back body 21. Both the rear body side flap 5 and the front body side flap 6 are formed as separate members from the diaper main body 8 (not a single body), and the rear body side flap 5 and the front body side flap 6 are It is composed of different sheet materials. In the present specification, the “front body” means a portion that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and “inseam” means to the wearer. When wearing a diaper, it means the part that covers the inseam of the wearer, and “rear body” means the part that covers the back side (back of the body) of the wearer when wearing a diaper. . A waist gather 17 may be formed on the back body 21.

  In use, the diaper can be attached and fixed to the wearer by fastening the fastening tape 7 to the front patch 24 arranged on the outer surface of the front body 23. A leg elastic member 14 made of a plurality of rubber bands is disposed along the leg openings on the outer sides of the absorbent body 4 of the crotch part 10 of the diaper so that excrement leaks from the legs when worn. It is a mechanism to prevent. Moreover, you may have a urine picking pad (not shown) in the inner surface side of the surface sheet 2 further. Here, in each sheet, the outer surface refers to the surface facing the outside (opposite to the body) when the diaper is worn on the wearer, and the inner surface refers to when the diaper is worn on the wearer. The surface facing the wearer's body.

  FIG. 2 is a cross-sectional view showing a state in which the tape-type disposable diaper 1 of the present invention in FIG. 1 is cut along line X-X ′. In FIG. 2, the absorber 4 is disposed between the top sheet 2 and the back sheet 3. Further, a pair of three-dimensional gathers 13 is formed on the outer side of both side edges of the absorbent body 4 by a part of the side sheet 12 arranged from both side edge parts of the diaper to both side edge parts of the absorbent body 4. The side sheet 12 is a side portion of the top sheet 2. In this embodiment, the top sheet 2 is formed by two side sheets 12 and a center sheet 11 disposed between the side sheets 12. Yes.

  The disposable diaper of the present invention having such a structure is necessary for the production of a diaper because the rear side flap and the front side flap are formed separately from the diaper body (not an integral part). It is possible to use only a simple member and prevent a wasteful waste portion from being generated, which makes it possible to manufacture at a low cost. Furthermore, since the rear side flaps and the front side flaps are composed of different sheet materials, the respective sheet materials can be made suitable for the function of the respective side flaps, thereby improving the comfort. It is also possible to improve the manufacturing cost and manufacture at a lower cost.

  Next, although each structural member used in the tape type disposable diaper of this invention is demonstrated, the tape type disposable diaper of this invention is not restrict | limited at all by these.

(1) Side flaps The rear body side flap and the front body side flap are configured from different sheet materials, thereby exhibiting excellent functions as the respective side flaps. For example, when wearing a diaper on a wearer, the side flaps on the back body should be placed along the body of the wearer, and the fastening tape disposed on the side edges of the side flaps on the back body should be fixed to the front patch while appropriately pulling Therefore, the back flaps of the back body need to have a certain level of strength, particularly the strength in the diaper width direction. On the other hand, when the front body side flaps are worn on the wearer, the front side flaps need only be along the wearer's body, and a strong external force beyond that is not normally applied. Therefore, the front body side flap does not need the strength as the back body side flap, the sheet material used as the material also uses a high strength sheet material for the back body side flap, the front body side flap, It is preferable to use a sheet material having a strength smaller than the side flaps of the back body. By using a low strength sheet material for the front body side flaps, it is possible to form the front body side flaps with a more inexpensive sheet material. Also, since the front flaps of the front body often come into direct contact with the wearer's skin, it is preferable to have a comfortable feel when touched. It becomes possible to make it more comfortable to use by making it soft and soft.

  The breaking strength can be used as an index of the strength of the side flap. That is, in the tape-type disposable diaper of the present invention, it is preferable that the breaking strength of the rear body side flap is larger than the breaking strength of the front body side flap. The breaking strength is the maximum breaking strength when a test piece (side flap) is sandwiched between 30 mm between chucks of a tensile tester and pulled at a speed of 300 mm / min. In the measurement of breaking strength, when the side flap to be measured is fixed to the diaper, the length in the diaper longitudinal direction is `` side flap width '', and the length in the diaper width direction is `` side flap length '' The sheet has a side flap width of 20 mm and a side flap length of 50 mm. Then, the test is performed by pulling in the side flap longitudinal direction. Usually, five sheets are measured, and the average value is taken as the sheet breaking strength. The breaking strength of the back body side flap is preferably 140 to 600 mN, and more preferably 160 to 400 mN. Further, the breaking strength of the front body side flap is preferably 60 to 200 mN, and more preferably 80 to 160 mN. By setting the breaking strength of each side flap within such a range, the side flaps are not broken during use, and are not hard and difficult to use.

In order to make the strength of the rear body side flap larger than the strength of the front body side flap, it is preferable to make the weight of the rear body side flap larger than the weight of the front body side flap. Here, the basis weight refers to the mass per unit area. By increasing the basis weight of the back flaps on the back body, the strength can be increased. Also, before preferably the basis weight of the body side flaps is 10 to 45 g / m ^2, and still more preferably from 13~35g / m ^2. By setting it as this range, it becomes a front body side flap which can obtain desired intensity | strength and is comfortable to use. If the basis weight is less than 10 g / m ² , the required strength may not be obtained during use, and if it is greater than 45 g / m ² , the comfort may be deteriorated and the cost may be increased. Basis weight of the back body side flaps is preferably 30~70g / m ^2, and still more preferably from 35~60g / m ^2. By setting it as this range, it becomes a back body side flap which can obtain desired intensity | strength and is comfortable to use. If the basis weight is less than 30 g / m ² , the strength required for use may not be obtained, and if it is greater than 70 g / m ² , the comfort may be deteriorated and the cost may be increased.

  Although it does not specifically limit as a material of the sheet | seat material which comprises a back body side flap and a front body side flap, It is preferable that it is a nonwoven fabric. As a nonwoven fabric, the nonwoven fabric comprised from the synthetic fiber is preferable. 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. The non-woven fabric used for the rear body side flap and the front body side flap may be the same as or different from each other in the above-described constituent materials and manufacturing method.

  As the back body side flap, in order to increase the strength in the diaper width direction, it is preferable to use a non-woven fabric by a spunbond manufacturing method, but non-woven fabrics by other manufacturing methods may be used as long as sufficient strength can be maintained. In order to increase the strength of the diaper width direction, the nonwoven fabric used for the back flaps of the back body may have an embossed pattern of the nonwoven fabric in the shape of an ellipse, a rhombus, etc. extending in a direction perpendicular to the flow direction in the manufacturing process. . In this case, when this side flap is fixed to the diaper, it is fixed so that the major axis direction of this emboss pattern (shape such as an ellipse) faces the longitudinal direction of the diaper. In addition, the ratio of the length in the major axis direction to the length in the minor axis direction (length in the major axis direction / length in the minor axis direction) of the ellipse, rhombus, etc. is preferably greater than 1, and is 1.1 to 8.0. More preferably, it is preferably 1.2 to 3.0. In this case, the embossed area is preferably 5 to 20%, and more preferably 7 to 15%. Moreover, you may use the nonwoven fabric formed with the thin fiber of the range of 0.5-1.5 denier. The front body side flap may be made of any type of nonwoven fabric, but it is low in weight and has a good texture, so SMS (spunbond / meltblown / spunbond) and SMMS (spunbond / meltblown / It is preferable to use (melt blow / spun bond).

(2) Diaper main body (2-1) Surface sheet A surface sheet is a sheet | seat arrange | positioned at a contact surface side with a wearer's skin. The surface sheet needs to absorb the wearer's urine and body fluid to the absorbent body arranged on the outer surface side thereof, so at least the upper surface of the absorber (the surface in contact with the surface sheet) is at least near the wearer's urine and body fluid. It is comprised by the liquid-permeable material which can permeate | transmit. In other words, as long as the vicinity of the upper surface of the absorber is made of a liquid-permeable material, the entire surface sheet does not necessarily need to be made of a liquid-permeable material.

  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. As this synthetic fiber, the same thing as the case of the nonwoven fabric mentioned as a material of the said side flap can be mentioned. The kind (manufacturing method) of a nonwoven fabric can also mention the same kind as the said side flap.

  In the tape type disposable diaper of this invention, although a contact surface with a wearer's skin may be comprised by the single surface sheet, it does not require that it is single. For example, as described above (see FIGS. 1 and 2), the center sheet 11 and the side sheets 12 arranged on both sides so as to sandwich the center sheet 11 may be used. The center sheet 11 extends in the longitudinal direction of the diaper and is disposed at the center in the width direction. The side sheet 12 is also a sheet extending in the longitudinal direction of the diaper. Thus, when the surface sheet is composed of a plurality of members, each sheet may be composed of the same material / material, or may be composed of different materials / 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.

(2-2) Back surface sheet A back surface sheet is a sheet | seat arrange | positioned rather than an absorber at the diaper outer surface side. Since the back sheet needs to prevent the wearer's urine and body fluid from leaking outside the diaper, at least the vicinity of the lower surface of the absorbent body (the surface in contact with the back sheet) is made of a liquid-impermeable material. The 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.

  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.

  In addition, you may bond the sheet | seat comprised with the material different from a back surface sheet to the outer surface side to a back surface sheet. In this specification, a sheet bonded to the back sheet is particularly 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.

(2-3) Absorber The absorber is a member for absorbing and holding the wearer's urine and body fluid, and at least a part between the two sheets described above (that is, the top sheet and the back sheet). Intervened. More specifically, the absorber may be interposed at least in the crotch region, and the absorber may extend to the back body and the front body. The absorbent body is made of an absorbent material because it needs to absorb and hold the wearer's urine and body fluid.

  In the present invention, any absorber can be used as long as it is used for absorbent articles such as ordinary disposable diapers. That is, it is possible to use a combination of cotton-like pulp and a super absorbent polymer (hereinafter referred to as “SAP”), a material added with a heat-fusible fiber, and the like. What is wrapped with such a hydrophilic sheet | seat is preferable. In addition, a sheet-like absorbent body such as one provided with a SAP layer on one side of a hydrophilic sheet and one in which SAP is sandwiched between two hydrophilic sheets can also be used.

As the cotton-like pulp, for example, a fiber 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 cotton-like pulp used is generally 50 to 400 g / m ² , although it varies depending on the structure of the absorbent body.

  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 cotton-like pulp and combined with SAP are preferred. At this time, the SAP may be uniformly mixed in each mat of the cotton-like pulp, or may be arranged in layers between the layers of the multilayer cotton-like 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 cotton pulp. By using such an amount, the SAP particles can minimize mutual interference, so that the particles do not form a permeation barrier, and can transmit and absorb urine and body fluid in a three-dimensional direction. It becomes possible.

  In addition, in the tape type disposable diaper of this invention, it is preferable to set it as the structure which wraps the whole absorber 4 with the hydrophilic sheet | seat 16 like the tape type disposable diaper 1 shown in FIG.1 and FIG.2, for example. 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 usually used for a conventional tape-type paper diaper, such as a rectangular shape, an hourglass shape, and a T-shape. Moreover, although the absorber 4 shown in FIG.1 and FIG.2 is a thing of a left-right symmetric shape, it is not specifically limited to such a thing, The thing of a left-right asymmetric shape may be sufficient.

  In addition, you may arrange | position the sheet | seat for diffusing liquids, such as urine and a bodily fluid, 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, the absorption rate of urine, body fluids, etc. is unlikely to decrease even when the outer surface side space of the topsheet is not sufficiently formed due to the posture of the wearer, etc. It is possible to prevent leakage of urine, body fluid, and the like due to the decrease.

  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.

(2-4) Solid Gather In the tape-type disposable diaper of the present invention, it is preferable that at least a pair of solid gathers is formed at least in the crotch part along the longitudinal direction of the diaper. This three-dimensional gather effectively prevents the wearer's urine and body fluid from leaking to the outside of the diaper, particularly 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. As the water-repellent material, a nonwoven fabric such as spunbond or card embossing can be used. However, it is preferable to use a nonwoven fabric such as SMS or SMMS because of its high water pressure resistance. 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 a surface sheet such as a center sheet or a side sheet. For example, the tape-type disposable diaper 1 shown in FIGS. 1 and 2 is an example in which a three-dimensional gather 13 is formed by folding back side sheets 12. However, 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 order to prevent leakage from the crotch part, this three-dimensional gather may be formed at least in the crotch part, but may be formed in the back body or the front body. For example, in the tape-type disposable diaper 1 shown in FIGS. 1 and 2, a pair of three-dimensional gathers 13 are continuously formed from the crotch part 22 to both the front body 23 and the back body 21 along the longitudinal direction of the diaper. An example is shown. Moreover, it is preferable to form one or more solid gathers.

  The height of the three-dimensional gather is preferably 5 to 100 mm, and more preferably 20 to 65 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 100 mm or less, the three-dimensional gather covers the absorbent body 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, become a flow path to the outside of the diaper of urine and body fluid, and can prevent problems such as leakage.

  On the other hand, when the height of the three-dimensional gather exceeds 100 mm, the three-dimensional gather covers the top sheet (and thus the absorbent body) or underlays the urine collecting pad placed on the top sheet. There is a risk that it may cause a leakage trouble due to the fact that it is trapped. In addition, when the three-dimensional gather exceeds the elastic material and protrudes to the outside of the diaper, a void (hole) is generated in that portion, and a flow path to the outside of the diaper of urine or body fluid is formed. May cause leakage.

  It is preferable to attach a three-dimensional gather elastic material to the three-dimensional gather. As the three-dimensional gather stretchable material, 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. 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 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.

  The arrangement position of the three-dimensional gather stretchable material is not particularly limited, and may be arranged at the upper end portion of the three-dimensional gather, may be arranged in the vicinity of the standing line 18 (see FIG. 2) of the three-dimensional gather, You may arrange | position between an upper end part and a standing line (specifically, a bending part, a folding | turning part, etc. of C fold gathers or Z fold gathers). For example, the tape-type disposable diaper 1 shown in FIGS. 1 and 2 is an example in which the upper end portion of the three-dimensional gather 13 is folded and the three-dimensional gather stretchable material 15 is arranged at the folded portion.

  In addition, although the tape-type disposable diaper 1 shown in FIG.1 and FIG.2 showed the example which made the shape, arrangement | positioning position, the number of arrangement | positioning, etc. of the three-dimensional gather stretchable material 15 left-right symmetric, those in which these are left-right asymmetric are also this invention. Included in the range. In addition, when using a plurality of three-dimensional gather stretchable materials, the thickness, stretch rate, etc. may be set appropriately according to the purpose, and it is not necessary to use all the same materials.

  Usually, the three-dimensional gather elastic material is fixed to the three-dimensional gather 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.

(2-5) Leg gathers Leg gathers are gathers formed around the legs of a diaper. The leg gather has an effect of preventing leakage from around the legs, and contracts on both sides of the absorber when changing the diaper, thereby deforming the vicinity of the crotch portion into a bowl shape and forming a recess. For this reason, urine and body fluid accumulate in the concave portion, and the diaper can be easily replaced without spilling urine and body fluid.

Leg gathers are usually flat gathers that are formed by placing elastic materials around the legs around the legs of the diaper. For example, the tape-type disposable diaper 1 shown in FIGS. 1 and 2 is an example in which leg gathers are formed by arranging two leg-stretchable elastic members 14 linearly along the longitudinal direction of the diaper. However, the leg-surrounding elastic members 14 are not necessarily arranged linearly, and may be arranged along a curve around the legs of the diaper, for example. In addition, as the leg periphery elastic material 14, the thing similar to the three-dimensional gather elastic material 15 already described can be used.

  For example, a pair of leg gathers is preferably formed in a portion outside the upright line 18 of the three-dimensional gather 13 like the tape-type disposable diaper 1 shown in FIGS. 1 and 2. With such a configuration, it is possible to improve the wearing feeling and wearing feeling of the crotch part while ensuring a sufficient leakage preventing effect of the three-dimensional gather.

  In addition, although the tape-type disposable diaper 1 shown in FIG.1 and FIG.2 showed the example which made the shape, arrangement | positioning position, the number of arrangement | positioning, etc. of the leg periphery elastic material 14 left-right symmetric, those which are asymmetrical left-right are also this invention. Included in the range. And in the tape type disposable diaper 1 shown in FIG.1 and FIG.2, although the example in which the leg periphery elastic material 14 was arrange | positioned two was shown, only one may be arrange | positioned and three or more are arrange | positioned. May be. Further, when using a plurality of leg-surrounding stretchable materials, the thickness, stretch rate, etc. may be set as appropriate according to the purpose, and it is not necessary to use the same for all.

(3) Fastening tape A fastening tape is a tape for making a wearer wear a paper diaper. There are no particular restrictions on the shape and structure of the diaper as long as it can be worn by the wearer by fixing the back and abdomen of the diaper to each other.

  For example, the tape-type disposable diaper 1 shown in FIGS. 1 and 2 has a pair of side flaps 5 disposed on both side edges of the back body 21, and two pairs of fastening tapes on both side edges of the side flap 5. 7 is arranged. These fastening tapes 7 are configured to be capable of being attached to a front patch 24 disposed on the outer surface of the front body 23. By sticking the fastening tape 7 to the front patch 24, the back body 21 and the front body 23 of the diaper are fixed to each other, and the diaper can be attached to the wearer.

  Moreover, although the tape-type disposable diaper 1 shown in FIG. 1 is provided with two pairs of fastening tape 7, even if it is provided with only one pair of fastening tapes 7 or more than three pairs, the same effect is obtained. Obtainable.

  In the present invention, as the fastening tape, any of an adhesive tape, a mechanical fastener and the like may be used. As an engaging part of a mechanical fastener, what is used for the mechanical fastener tape of a normal disposable diaper etc. which has various shapes, such as a bowl shape, a mushroom shape, and a bowl shape, can be used as it is.

(4) Manufacturing method of tape-type disposable diaper The manufacturing method of the tape-type disposable diaper of this invention is demonstrated with FIG. First, an absorbent body 4 and a leg-surrounding elastic material (not shown) wrapped in a hydrophilic sheet are placed on the upper surface (inner surface) of a long sheet material (back sheet material) 32 that is a material for the back sheet. Further, by placing a long sheet material (surface sheet material) 31 as a material of the surface sheet on the upper surface, a laminate 33 as an intermediate body of the diaper is obtained. At this time, as the surface sheet material 31, two types of surface sheet material corresponding to the center sheet and surface sheet material corresponding to the side sheet are used. A three-dimensional gather (not shown) is formed by providing a folded portion on the sheet material corresponding to the side sheet.

  Next, a long sheet material (rear body side flap sheet material) 34 serving as a material for the rear body side flap is cut to form a rear body side flap material 36 having a predetermined shape, and a portion corresponding to the rear body of the laminate 33 is formed. Fix it. At the same time, a long sheet material (front body side flap sheet material) 35 serving as a material for the front body side flap is cut to form a front body side flap material 37 having a predetermined shape, and a portion corresponding to the front body of the laminate 33. Secure to. In FIG. 3, the rear body side flap material 36 and the front body side flap material 37 are formed in a trapezoidal shape, but the shape is not limited to a trapezoid as long as it can be used as a side flap.

  Next, the fastening tape 7 is fixed to the back flap 5 of the back body, and the laminated body 33 is cut at a predetermined position so as to be in the shape of a tape-type disposable diaper, thereby obtaining the tape-type disposable diaper of the present invention. it can. The side flaps may be fixed on the top sheet side or the back sheet side. It is preferable to fix to the back sheet side with little discomfort when worn. The side flap fixing method may be an adhesive, but may be any of heat sealing and ultrasonic bonding.

  The above-described manufacturing method employs a method / apparatus for continuously feeding each long sheet material from a roller, which enables continuous production of a tape-type diaper and contributes to improvement in productivity. As a manufacturing apparatus, what is normally used when manufacturing a tape-type disposable diaper using a long sheet can be used.

  In the tape type disposable diaper manufacturing method of the present invention, as shown in FIG. 4, after the rear body side flap sheet material 34 is cut to form the rear body side flap material 36, the fastening tape 7 is fixed. Thereafter, the body side flap material 36 may be fixed to the laminate 33. Because the production speed of the side flaps is slower than the production speed of the diaper body including the absorbent body, it is easier to fix the fastening tape to the side flaps than to fix the fastening tape directly to the diaper body. There are advantages.

  Moreover, in the manufacturing method of the tape type disposable diaper of this invention, as shown in FIG. 5, the absorber 4 and the leg periphery elastic material (not shown) are mounted on the upper surface of the back surface sheet material 32, and back body The side flap material 36 and the front body side flap material 37 are fixed to a predetermined position of the back sheet material 32, and then the top sheet material 31 is further placed on the upper surface thereof, and finally cut at the predetermined position, You may manufacture the tape-type disposable diaper of invention. According to such a method, since the side flap is sandwiched between both the top sheet and the back sheet, the fixing effect of the side flap is high, and the occurrence of troubles such as detachment of the side flap can be suppressed. Also in this case, the fastening tape may be fixed to the side flaps in advance, and then the side flaps may be fixed to the diaper body.

  The tape-type paper diaper of the present invention can be used as a disposable diaper for infants or a disposable diaper for adults such as elderly people and persons with disabilities who need care.

It is a partially notched top view which shows the state which expand | deployed the tape type disposable diaper of this invention, and was seen from the surface sheet side. It is a schematic sectional drawing which shows the cross section which cut | disconnected the tape-type disposable diaper of this invention shown in FIG. 1 along the X-X 'line. It is a top view which shows one Embodiment of the manufacturing method of the tape type disposable diaper of this invention. It is a top view which shows other embodiment of the manufacturing method of the tape type disposable diaper of this invention. It is a top view which shows other embodiment of the manufacturing method of the tape type disposable diaper of this invention.

Explanation of symbols

1: Tape-type disposable diaper, 2: Top sheet, 3: Back sheet, 4: Absorbent body, 5: Back flap, 6: Front side flap, 7: Fastening tape, 8: Diaper body, 11: Center sheet , 12: side sheet, 13: three-dimensional gather, 14: elastic material around leg, 15: three-dimensional gather elastic material, 16: hydrophilic sheet, 17: waist gather, 18: standing line, 21: back body, 22: inseam , 23: Front body, 24: Front patch, 31: Front sheet material, 32: Back sheet material, 33: Laminated body, 34: Rear flap side flap sheet material, 35: Front body side flap sheet material, 36: Rear body Side flap material, 37: Front body side flap material.

Claims (6)

A tape comprising a front sheet, a crotch part, and a back body, comprising a front sheet, a back sheet, and a diaper body having an absorbent body interposed between at least a part of the sheets and a fastening tape for mounting. Type disposable diaper,
It further comprises side flaps (rear body side flaps) disposed on both side edges of the back body, and side flaps (front body side flaps) disposed on both side edges of the front body,
A tape-type disposable diaper in which the rear body side flap and the front body side flap are made of different sheet materials.   The tape-type disposable diaper according to claim 1, wherein the basis weight of the rear body side flap is larger than the basis weight of the front body side flap.   The tape-type disposable diaper according to claim 1 or 2, wherein the breaking strength of the rear body side flap is larger than the breaking strength of the front body side flap. Tape type disposable diaper according to any one of claims 1 to 3 weight per unit area of the front body side flaps is 10 to 45 g / m ^2. Tape type disposable diaper according to any one of claims 1 to 4 weight per unit area of the back body side flap is 30~70g / m ^2.   The tape-type disposable diaper according to any one of claims 1 to 5, wherein a sheet material constituting the rear body side flap and the front body side flap is a nonwoven fabric.

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