JP2011188970A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper whose joined surfaces are not exposed when putting it on and disposing it by preventing a post-treatment tape from being stuck or peeling. <P>SOLUTION: The diaper composes of a belly part F, a back part B and a crotch part M, and has the post-treatment tape 30 for disposing at the longitudinal end of the back part B. The post-treatment tape 30 includes a fixed part 31 to be fixed on the external surface of the diaper, a fixing part 32 with a joining means 34 attached to one side face thereof, and an intermediate part 33 for connecting the fixed part 31 and the fixing part 32. The intermediate part 33 is elastic and stretchable. The fixing part 32, when it is not in use, is folded back to the inner diaper surface side at a position corresponding to the diaper longitudinal end, so that it can be detachably attached to the inner surface of the waist portion. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a disposable diaper having a post-treatment tape for disposal on one side of a back body and a front body.

  In recent years, disposable diapers used for infants and elderly people have become the mainstream, but among these types of disposable diapers, pants-type diapers are used in order to facilitate disposal when discarded. The so-called post-processing tape 50 (60) is provided in a folded state (see FIG. 13).

  This post-treatment tape 50 (60) is rolled out after the paper diaper is rolled up to a small size at the time of disposal, and the fastening portion provided at the tip of the free end is fastened to an arbitrary place beyond the trunk opening, thereby making the paper diaper This prevents the rounded state from being released. As the structure of the post-processing tape, for example, in Patent Document 1 shown below, as shown in FIG. 14, it is a strip-like tape fastener and has a fixing adhesive layer 53 and is fixed to the outer surface of the diaper. 50A, a fastening part 50B having an adhesive layer 51, and an intermediate part 50C that connects them, and when not in use, the fixing part 50A, the fastening part 50B, and the intermediate part 50C are folded in a three-fold state so as to overlap. The adhesive layer 51 of the fastening part 50B is detachably bonded to the intermediate part 50C, and the adhesive layer 52 formed on the surface of the intermediate part 50C on the fixed part 50A side can be peeled to the outer surface of the fixed part 50A. It is trying to adhere to.

  Further, in Patent Document 2 shown below, as shown in FIG. 15, as a tape fastener 60, a fixing portion 61 that is bonded and fixed to the back sheet, and a fastening portion 62 that rounds and fastens the diaper when the diaper is discarded. The fixing portion 61 and the fastening portion 62 are each composed of a mount 63, 63 'and an adhesive layer 64, 64' formed by applying an adhesive to one surface of the mount 63, 63 '. Has been.

JP 2001-258938 A Japanese Patent Laid-Open No. 11-56904

  However, in the post-processing tape 50 (60) described in Patent Documents 1 and 2 above, the end of the knob for extending the post-processing tape is located on the outer surface of the diaper. The person was pulling, and the post-processing tape was easily turned up or peeled off. If the plucked part where the curling or peeling occurs is warped, the adhesive layer will be exposed, sticking to the unintended part and gradually decreasing the adhesive force, and there is a problem that the diaper cannot be kept in a rolled state when the diaper is discarded .

  Further, in the post-processing tape 50 described in Patent Document 1, since the adhesive layer 52 is provided in the intermediate portion 50C folded in the Z shape, the post-processing tape 50 is stopped in a state where the diaper is rolled up when the diaper is discarded. When worn, this pressure-sensitive adhesive layer 52 is exposed to the outside, and there is a problem that it sticks to a garbage bag or hand and is difficult to throw away.

  Therefore, a main object of the present invention is to provide a disposable diaper that prevents the post-processing tape from being caught and turned up, and whose bonding surface is not exposed during mounting or disposal.

In order to solve the above-mentioned problem, as the present invention according to claim 1, a ventral part located on the abdomen side of the wearer, a dorsal part located on the dorsal side of the wearer, the abdomen part and the dorsal part A disposable diaper comprising a post-treatment tape for disposal at the diaper longitudinal end of the back side or abdomen,
The post-processing tape is composed of a fixed portion fixed to the outer surface of the diaper, a fastening portion having a joining means on one side surface, and an intermediate portion connecting the fixed portion and the fastening portion,
The intermediate portion has elastic elasticity, and the fastening portion is folded back to the inner surface of the diaper at a position corresponding to the diaper longitudinal end edge in an unused state, and is removable from the inner surface of the waist portion. A disposable diaper is provided.

  In the first aspect of the invention, as a post-treatment tape for disposal provided at the diaper longitudinal end of the back side or the abdomen, a fixing part fixed to the outer surface of the diaper and a joining means on one side surface A fixing portion having a middle portion connecting the fixing portion and the fixing portion, the intermediate portion has elastic stretchability, and the fixing portion is an unused diaper longitudinal end edge Is used which is folded back to the inner surface side of the diaper at a position corresponding to 1 and can be attached to and detached from the inner surface of the waist portion. When disposing of used diapers, round the used diaper from the crotch side, release the state of attachment of the joining means to the inner surface of the waist, and pull the post-treatment tape so that the rounded diaper circulates as it is. Then, in a state where the intermediate portion having elastic elasticity is stretched, the joining means is fixed to the outer surface of the diaper and the rolled state is fixed. Therefore, unlike the conventional post-processing tape, it does not stretch and fasten the folded state, so the joint surface is not exposed on the outer surface side, and the exposed joint surface is a garbage bag. It will not cause inconveniences such as sticking to hands or hands.

  In addition, the fastening portion is folded back to the inner surface of the diaper at a position corresponding to the diaper longitudinal end edge in the unused state, and can be attached to and detached from the inner surface of the waist portion. Since the portion is located on the inner surface of the diaper, it is possible to avoid a situation in which the picking end portion of the post-processing tape is caught by clothes or hands when worn. In addition, the user can no longer play by pulling on the end of the knob even during mounting, and the post-processing tape can be prevented from being turned over. Therefore, the joint surface is not exposed when the post-processing tape is turned over.

  As the present invention according to claim 2, there is provided the disposable diaper according to claim 1, wherein the intermediate portion is constituted by a nonwoven fabric or a plastic film having elastic elasticity in at least the diaper longitudinal direction.

  The invention according to claim 2 is a specific configuration for allowing the intermediate portion to have elastic stretchability, and the intermediate portion is constituted by a nonwoven fabric or a plastic film having elastic stretchability in at least the diaper longitudinal direction. It is what I did.

  As a third aspect of the present invention, there is provided the disposable diaper according to any one of the first and second aspects, wherein the intermediate portion has an expansion / contraction ratio of at least 200% at the maximum extension.

  The invention according to claim 3 is to secure the length of the post-treatment tape for winding the diaper rounded when the diaper is disposed, by having an expansion ratio of at least 200% when the intermediate part is at the maximum extension. Thereby, the state which rounded the diaper can be firmly fixed.

  According to a fourth aspect of the present invention, the fastening portion is folded inward in the middle, and a crease is attached by joining the mating surfaces of the inner surfaces with a predetermined width at the folded portion. A disposable diaper according to any of the above is provided.

  The invention according to claim 4 is to make it easier to maintain the state in which the fastening part is mounted on the inner surface of the waist part in an unused state by attaching an inner crease to the fastening part. The fastening portion is folded inward in the middle, and the mating surfaces of the inner surfaces are joined with a predetermined width at the folded portion.

  As the present invention according to claim 5, there is provided the disposable diaper according to any one of claims 1 to 4, wherein the joining means of the fastening portion is a mechanical joining type fastening tape.

  In the invention described in claim 5, by using a mechanical joining type fastening tape as the joining means of the fastening portion, it is possible to maintain the fastening force and prevent stickiness when it is detached. .

  As described above in detail, according to the present invention, it becomes possible to provide a disposable diaper that prevents the post-processing tape from being caught or turned up and that does not expose the joint surface during mounting or disposal.

It is a product state appearance rear view of disposable diaper 1 concerning the present invention. It is the development view of the skin side. FIG. 2 is a development view of the non-skin surface side of FIG. 1. It is the IV-IV arrow line view of FIG. It is the VV arrow directional view of FIG. It is the IV-IV line arrow directional view of FIG. 2 in a product state. FIG. 3 is an exploded perspective view of the absorbent main body 10 and the exterior sheet 20. FIG. 3 is a development view of the exterior sheet 20. It is the IX-IX arrow directional view of FIG. 3 is a side view of the post-processing tape 30. FIG. It is a side view of the post-processing tape 30 in the extended state. FIG. 4A is a perspective view showing a procedure 1 and FIG. It is a perspective view of the disposable diaper which equipped with the conventional post-processing tape 50. FIG. A conventional post-treatment tape 50 is shown, (A) is a folded state diagram, and (B) is a schematic view for easy understanding of the formation mode of the pressure-sensitive adhesive layer. A conventional post-treatment tape 60 is shown, (A) is a folded state diagram, and (B) is a schematic view for easy understanding of the formation mode of the pressure-sensitive adhesive layer.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present invention, the “diaper longitudinal direction” means a direction connecting the stomach side and the back side of the diaper (front-rear direction when the diaper is deployed), and the “diaper width direction” and the “diaper circumferential direction” It means the direction orthogonal to the longitudinal direction of the diaper (the left-right direction when the diaper is deployed). In addition, the adhesion | attachment site | part is clearly shown by x mark in the required site | part of drawing.
[Example of basic structure of disposable diaper 1]
A disposable diaper 1 according to the present invention (hereinafter simply referred to as a diaper) is composed of a liquid-permeable top sheet 11 made of a nonwoven fabric and a back sheet 12 made of polyethylene or the like, as shown in FIGS. An absorbent main body 10 having an absorbent body 13 made of cotton pulp or the like interposed therebetween, and an abdominal side portion F which is integrally joined to the absorbent main body 10 and located at least on the ventral side of the wearer and the wearer And the waist part between the upper layer nonwoven fabric and the lower layer nonwoven fabric, and the waist part between the upper layer nonwoven fabric and the lower layer nonwoven fabric. And the exterior sheet | seat 20 in which many elastic elastic members are arrange | positioned along a trunk periphery part. Then, the waist side WO and the pair of left and right leg openings LO and LO are formed by joining the ventral side part F and the back side part B of the exterior sheet 20 at the side seal parts 40 and 40 on both sides. It has become a pants type. The crotch part M located between the abdominal part F and the dorsal part B and located at the crotch of the wearer is configured with at least the absorbent main body 10 interposed.

Hereinafter, each configuration will be described in detail.
(About the absorbent main body 10)
First, an example of the structure of the absorbent main body 10 will be described in detail with reference to FIGS.

As described above, the absorbent main body 10 includes a fiber aggregate such as cotton-like pulp and a superabsorbent polymer between the liquid-permeable top sheet 11 made of a nonwoven fabric and the like and the back sheet 12 made of polyethylene or the like. This is a structure in which an absorbent body 13 made of a superabsorbent or the like is interposed, and absorbs and retains body fluids. The absorbent body 13 is preferably a basis weight of about 50~600g / ^{m 2,} about 300 to 500 g / ^{m 2} is more preferable.

  Examples of the superabsorbent polymer include cross-linked polyacrylate, self-crosslinked polyacrylate, saponified acrylate-vinyl acetate copolymer cross-linked, isobutylene / maleic anhydride copolymer cross-linked, Examples include cross-linked polysulfonates, and partially cross-linked water-swellable polymers such as polyethylene oxide and polyacrylamide. Among these, those based on acrylic acid or acrylate that are excellent in water absorption and water absorption speed are preferred. In the production process, the superabsorbent polymer having the water absorption capability can adjust the water absorption (absorption capacity) and the water absorption speed by adjusting the crosslink density and the crosslink density gradient. The content ratio of the superabsorbent polymer in the absorbent body 13 is suitably about 30 to 70%, but is not limited thereto. Also, in the illustrated example, the planar shape having the constricted portions on both sides to reduce the contact around the legs is a substantially hourglass shape, but it is also possible to use a shape formed as a substantially rectangular shape, In this case, the width dimension is set to a dimension width that does not give the wearer a feeling of sticking by hitting the crotch portion.

The absorber 13 is surrounded by the encapsulating sheet 14. As the encapsulating sheet 14, a paper material such as tissue or a liquid-permeable sheet such as a nonwoven fabric can be used. The thickness is preferably about 0.05 to 0.5 mm, more preferably about 0.05 to 0.2 mm. The basis weight is preferably about 5 to 25 g / ^{m 2,} about 5 to 15 g / ^{m 2} is more preferable. When using a non-woven fabric, a non-woven fabric processed by a spunbond method or an SMS method, particularly a non-woven fabric processed by an SMS method, is preferred because of its excellent balance between thinness and strength. In addition, as long as the surface of the absorber 13 at least the surface side (skin contact surface side) of the encapsulating sheet 14 is not water-repellent, the hydrophilicity of the sheet is not particularly limited.

As the liquid-permeable surface sheet 11 covering the surface side (skin contact surface side) of the absorbent body 13, a porous or non-porous nonwoven fabric or a porous plastic sheet is preferably used. The material fibers that make up the nonwoven fabric can be synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, an SMS method, a thermal bond method, an air through method, a point bond method, a melt blown method, or a needle punch method can be used. In particular, the nonwoven fabric processed by the spunbond method or the SMS method is suitable in that it has a good balance between thinness and strength, and the nonwoven fabric processed by the air-through method is quick to absorb and excellent in dry touch even at a low basis weight. Therefore, it is preferable. These may be a sheet made of two or more layers in a sheet composed of a single layer (the same type or plural types) but, as the basis weight of the total, preferably from 10 to 40 g / ^{m 2,} more preferably 10~22g / ^{m 2} 10 to 15 g / m ² is particularly preferable. The thickness is preferably 1 mm or less, more preferably 0.5 mm or less, and particularly preferably 0.3 mm or less. When a large number of through holes are formed in the top sheet 11, urine and the like are quickly absorbed, and the dry touch property is excellent. The top sheet 11 is wound around the side edge of the absorber 13 and extends to the back side of the absorber 13.

The back sheet 12 that covers the back surface side (non-skin contact surface side) of the absorbent body 13 is made of a liquid-impervious plastic sheet such as polyethylene or polypropylene, but in recent years has moisture permeability from the viewpoint of preventing stuffiness. Are preferably used. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. If the sheet thickness is the same, the rigidity is lower than that of the non-porous sheet, which is superior in terms of flexibility. Specifically, the moisture permeability measured according to JIS Z0208 is 3000 to 12000 g / m ² · 24 hr, preferably 6000 to 12000 g / m ² · 24 hr, more preferably 8000 to 12000 g / m ² · 24 hr. It is desirable to use a liquid sheet.

  On the other hand, the gathered nonwoven fabric 15 forming the three-dimensional gathered BS is a nonwoven fabric made into a double sheet by folding, and the absorbent body 13 is further wound from the upper side of the side edge portion of the absorbent body 13 wound by the topsheet 11. It extends to the back side of and is bonded. More specifically, the gathered nonwoven fabric 15 has a three-dimensional gather BS forming portion at the middle part in the longitudinal direction of the diaper, and a range extending from the middle part in the width direction to the back side of the absorbent body 13 is bonded by a hot melt adhesive or the like. Further, at the front and rear end portions in the longitudinal direction, the section from the intermediate portion in the width direction to the one side end edge is bonded in a range extending to the back surface side of the absorber 13, and the portion forming the three-dimensional gather BS is the absorber. While being folded at the upper surface portion of 13, it is bonded by a hot melt adhesive or the like.

  In the gathered nonwoven fabric 15 formed of the double sheet nonwoven fabric, as shown in FIG. 4, a plurality of thread-like elastic elastic members 16, 16,... A thread-like elastic elastic member 17 is disposed near the side edge of the main body 10, and a thread-like elastic elastic member 18 is disposed on the back side of the absorber 13. The tip elastic elastic members 16, 16... Are mainly used to form a three-dimensional gather BS by raising a nonwoven fabric portion protruding from the absorber side edge portion by elastic elastic force. As shown in the product state diagram of FIG. 6, mainly the elastic gathering force 17 and 18 bend the side of the absorbent main body 10, and use the side of the absorbent body 13 as a standing end to form the base of the three-dimensional gather BS It is for constituting an end portion.

  As the thread-like elastic elastic member 17, a material such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, or the like that is usually used can be used. Further, in order to make it difficult to see from the outside, it is preferable that the thickness is 940 dtex or less and the tension (extension rate) is 150 to 350%. Instead of the thread-like elastic elastic member, a tape-like elastic elastic member having a certain width may be used.

In the same manner as the surface sheet 11, the material fiber constituting the gathered nonwoven fabric 15 is made of synthetic fiber such as polyethylene or polypropylene, synthetic fiber such as polyethylene or polypropylene, recycled fiber such as rayon or cupra, cotton, etc. A natural fiber can be used, and a nonwoven fabric obtained by an appropriate processing method such as a spunbond method, an SMS method, a thermal bond method, an air-through method, a point bond method, a melt blown method, or a needle punch method can be used. Specifically, the non-woven fabric processing method is suitable by the spunbond method or the SMS method in terms of excellent balance between thinness and strength, and the basis weight is preferably 8 to 30 g / m ² , and 10 to 22 g. / M ² is more preferable, and 10 to 15 g / m ² is particularly preferable. The thickness is preferably 0.5 mm or less, more preferably 0.3 mm or less, and particularly preferably 0.2 mm or less. Further, with respect to the gathered nonwoven fabric 15, in order to prevent the transmission of urine and the like, to prevent fogging and to improve the feel to the skin (dry feeling), a silicon-based, paraffin-metal-based, alkylchromic chromoid-based water repellent You may use the water-repellent treatment nonwoven fabric which coated etc.
(About exterior sheet 20)
As shown in detail in FIG. 8, the exterior sheet 20 includes a skin-side gather pressing sheet 21 </ b> A and a non-skin-side back sheet 21 </ b> B, and a front body side shirring zone K <b> 1 and a rear part therebetween. The waist elastic elastic members 24, 24... Fixed in the diaper width direction at intervals in the up-down direction of the waist 23 and the waist-side elastic members 24, 24. Are provided with a plurality of waistline elastic members 26, 26... Arranged and fixed under extension along the diaper width direction. In addition, concave leg-around lines 29 and 29 for forming leg openings are formed at portions corresponding to both sides of the diaper middle. In the illustrated example, the gather pressing sheet 21A is provided in a range that covers at least a part of the front body side shearing zone K1 and the rear body side shearing zone K2, and is not provided in the intermediate zone M. You may make it provide integrally from the time to the back body.

  It is preferable that the gather pressing sheet 21A and the back sheet 21B are bonded with a hot melt adhesive or the like over substantially the entire shearing zones K1 and K2 where the elastic elastic members are disposed. By doing so, when the elastic elastic member is cut finely, it is preferable because fragments of the elastic elastic member do not move between the sheets. Further, in order to further secure the elastic elastic member, a hot melt adhesive is applied to the peripheral surface of the elastic elastic member by a known direct application method such as control seam application, omega application or sure wrap application, May be strengthened. If the adhesive strength is excessively strengthened, the elastic elastic member cut finely may cause the exterior sheet to shrink finely, thereby impairing the appearance. In such a case, the hot melt adhesive may be directly applied to the elastic elastic member only at the site where the adhesive force needs to be strengthened.

  Further, in the illustrated example, the exterior sheet 20 is integrally formed from the abdominal side F to the back side B, but for the back body at least in the shirring zones K1 and K2 of the abdominal side F and the back side B. The exterior sheet and the exterior sheet for the front body may be provided separately. In this case, it is preferable to dispose the crotch outer sheet on the outer surface of the absorbent main body 10 in the crotch part between the rear body outer sheet and the front body outer sheet. In this case, the crotch outer sheet is made of the same material as the back sheet of the rear body outer sheet and the front body outer sheet. As a result, the boundary between the crotch outer sheet, the rear body outer sheet, and the front body outer sheet becomes inconspicuous. In addition, the crotch outer sheet may be made of a material different from the back sheet of the rear body outer sheet and the front body outer sheet. Since the outer sheet for the crotch part located in the crotch part is often rubbed between the wearer's crotch, it is preferable to use a nonwoven fabric material that is superior in flexibility and wear resistance to the front and back body sheets. In order to improve the wear resistance of the crotch outer sheet, embossing is performed from the outer surface side of the crotch outer sheet so that the crotch outer sheet 20 and the back sheet 12 are integrated. can do. The crotch outer sheet 20 may be provided over the entire length of the absorbent main body 10, but only on the crotch part so as to connect the rear body outer sheet and the front body outer sheet that are arranged separately. It is preferable to provide it.

As the constituent material of the gather presser sheet 21A and the back sheet 21B, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon and cupra, and natural fibers such as cotton are used. A nonwoven fabric obtained by an appropriate processing method such as a spun bond method, a thermal bond method, a melt blown method, or a needle punch method can be used. In addition, a core-sheath type bicomponent nonwoven fabric using a fiber having a high melting point as a core and a fiber having a low melting point as a sheath, or a nonwoven fabric made of a composite fiber such as a side-by-side fiber or a split fiber can be used. The bicomponent nonwoven fabric is preferable because it can be excellent in heat-fusibility.
[Structure of post-processing tape 30]
In this disposable diaper 1, as shown in FIG. 1, a post-processing tape 30 for disposal is provided at the diaper longitudinal end of the back side portion.

  As shown in detail in FIGS. 9 and 10, the post-processing tape 30 is detachably attached to the outer surface of the diaper on the one side and a fixing portion 31 that is bonded to the outer surface of the diaper so as not to be peeled off. A band-shaped tape fastener is formed of a fastening part 32 having a joining means 34 and an intermediate part 33 that connects the fixing part 31 and the fastening part 32, and is continuous from the fixing part 31 to the intermediate part 33 in the illustrated example. The first tape member 35 and the second tape member 36 constituting the fastening portion 32 are configured.

  The intermediate portion 33 has elastic elasticity. That is, the 1st tape member 35 which comprises the intermediate part 33 is comprised with the raw material which has elastic elasticity. As the material having such elastic stretchability, a resin film such as a nonwoven fabric or plastic containing elastic fibers having at least elastic stretchability in the longitudinal direction of the diaper can be used.

  As the elastic fiber, a thermoplastic elastomer resin melted and spun can be used. In order to produce a nonwoven fabric containing elastic fibers, a method of forming a web by directly connecting to a spinning process such as a melt blow method or a spun bond method is preferable. In addition, a composite in which a hydrophobic fiber nonwoven fabric made of crimped fibers obtained by melting and spinning a thermoplastic synthetic resin of polypropylene, polyethylene, or polyester is bonded to at least one surface of a hydrophobic fiber nonwoven fabric made of thermoplastic elastomer resin fibers. Nonwoven fabrics can also be used.

  As the elastic expansion / contraction rate of the intermediate portion 33, it is preferable to use a material having an expansion / contraction rate of at least 200% at the maximum extension. The “at the time of maximum extension” refers to a state where an adult pulls the post-treatment tape 30 with a normal tensile force when discarding a diaper. Specifically, it is desirable that the length of the diaper in the longitudinal direction is about 3 cm in an unused state to about 6 cm (elongation of about 3 cm) at maximum elongation.

  The fixing portion 31 is firmly fixed to the outer surface of the diaper by an adhesive means such as a hot melt adhesive, or a welding means such as heat seal or ultrasonic adhesion. For this reason, even if the first tape member 35 is provided continuously from the intermediate portion 33, the elastic stretchability is almost lost.

  The fastening portion 32 includes at least a second tape member 36 made of a sheet material such as plastic, polylaminated nonwoven fabric, nonwoven fabric, and paper, and a joining means 34 attached to the diaper side surface of the distal end portion of the second tape member 36. It consists of and. The second tape member 36 is a laminated portion of the first tape member 35 and the extending portion side of the first tape member 35 by a melting means such as heat sealing or ultrasonic bonding or an adhesive means such as a hot melt adhesive. The first tape member 35 is firmly fixed.

  The joining means 34 may be a mechanical joining type fastening tape. As the mechanical joining type fastening tape, one having a large number of engaging pieces on its outer surface is used. Examples of the shape of the engagement piece include a letter shape, a J shape, a mushroom shape, and a T shape, but any shape may be used. Preferred is a T-shape. In the unused state, the joining means 34 is detachably joined to the inner surface of the waist portion.

  The fastening portion 32 is folded inward in the middle in the longitudinal direction of the diaper, and a crease is formed by joining the mating surfaces of the inner surfaces with a predetermined width at the folded portion 37 by an adhesive means such as a hot melt adhesive. ing. Thereby, the front-end | tip of the fixing | fixed part 32 can be maintained in the state which turned up the inner surface of the waist part. The folded portion 37 is formed at a position substantially coinciding with the opening edge of the waist opening WO. For this reason, the post-processing tape 30 is attached at substantially the same height as the opening edge of the waist opening WO.

  In the illustrated example, the second tape member 36 is folded back so as to wind the leading end of the extending portion from the outer surface side of the fastening portion side extending portion of the first tape member 35, and the folded portion is predetermined. The folded portion 37 is formed by being joined to the distal end portion of the extending portion with a width. Alternatively, the middle of the second tape member 36 may be folded inward, and the mating surfaces of the inner surfaces of the second tape member 36 may be joined to each other with a predetermined width A at the folded portion. The predetermined width A for joining the mating surfaces of the folded portions is preferably 1 to 3 mm, and more preferably 1 to 2 mm.

  Further, it is preferable that a reinforcing tape 38 is joined to the inside of the folded portion 37 across the joining portion of the mating surfaces. Thereby, as shown in FIG. 11, when the fastening portion 32 is picked and pulled, the joined state of the folded portion 37 is reinforced.

By the way, as shown in FIG. 9, the back sheet 21B of the exterior sheet 20 is folded back to the skin side at both ends of the exterior sheet 20 in the longitudinal direction of the diaper, and joined so as to sandwich the gather presser sheet 21A. In the back side portion B where the post-processing tape 30 is provided, the end portion is a free end portion that is not joined, and the side seal portions 40, 40 on both sides in a state where the free end portion is folded back to the waist opening WO side. It is preferable to have a structure in which the folded state is maintained by joining, and the folded free end portion is configured to overlap the folded portion of the fastening portion 32 of the post-processing tape 30 in the unused state. As a result, the tip of the fastening portion 32 does not directly contact the wearer's skin during wearing, and can be prevented from being caught or rubbed.
[How to use post-processing tape 30]
When the used diaper 1 is discarded, as shown in FIG. 12 (A), the diaper 1 is rounded from the crotch side, and the mounting state on the inner surface of the waist portion of the joining means 34 of the fastening portion 32 is released. When the post-processing tape 30 is pulled so as to circulate the rolled diaper 1 as it is and the intermediate portion 33 is expanded, the joining means 34 of the fastening portion 32 is shown in FIG. Fasten to the outer surface of the diaper and fix the rolled state.

In addition, when the diaper 1 is attached, the attachment state of the fastening part 32 to the inner surface of the waist part is released, and when the diaper 1 is pulled as it is and extended upward, the joining means 34 is attached to the outer surface of the upper garment. Usage is also possible. This can prevent the diaper from slipping down.
[Other examples]
(1) In the above embodiment, the post-processing tape 30 is provided at the diaper longitudinal end of the back side, but may be provided at the diaper longitudinal end of the ventral side.
(2) In the above embodiment, the basic structure of the disposable diaper 1 is composed of the absorbent main body 10 and the exterior sheet 20 constituting at least the ventral side F and the back side B, and the ventral side of the exterior sheet 20 Although F and the back part B were joined in the side seal parts 40 and 40 on both sides, a pants-type one in which a waist opening WO and a pair of left and right leg openings LO and LO were formed was used. An absorbent body is interposed between the liquid-permeable top sheet and the back sheet, and a tape-type disposable diaper having a fastening tape on both sides of the diaper back side can also be used.

  DESCRIPTION OF SYMBOLS 1 ... Disposable diaper, 10 ... Absorbent main body, 11 ... Top sheet, 12 ... Back sheet, 13 ... Absorber, 14 ... Encapsulating sheet, 15 ... Gathered nonwoven fabric, 16-18 ... Thread elastic elastic member, 20 ... Exterior sheet 21A ... Gathering sheet, 21B ... Back sheet, 23 ... Waist part, 24 ... Waist elastic elastic member, 25 ... Girth circumference part, 26 ... Elastic elastic member, 29 ... Leg circumference line, 30 ... Post-treatment tape, DESCRIPTION OF SYMBOLS 31 ... Fixed part, 32 ... Fastening part, 33 ... Intermediate | middle part, 34 ... Joining means, 35 ... 1st tape member, 36 ... 2nd tape member, 37 ... Folding part, 38 ... Reinforcement tape, 40 ... Side seal Part, LO ... leg opening, WO ... waist opening

Claims (5)

From the abdominal part located on the abdomen side of the wearer, the back side part located on the back side of the wearer, and the crotch part located between the abdomen side part and the back side part and located in the crotch of the wearer A disposable diaper comprising a post-treatment tape for disposal at the diaper longitudinal end of the dorsal side or ventral side,
The post-processing tape is composed of a fixed portion fixed to the outer surface of the diaper, a fastening portion having a joining means on one side surface, and an intermediate portion connecting the fixed portion and the fastening portion,
The intermediate portion has elastic elasticity, and the fastening portion is folded back to the inner surface of the diaper at a position corresponding to the diaper longitudinal end edge in an unused state, and is removable from the inner surface of the waist portion. Disposable diapers.   The disposable diaper according to claim 1, wherein the intermediate portion is constituted by a nonwoven fabric or a plastic film having elastic elasticity in at least a diaper longitudinal direction.   The disposable diaper according to any one of claims 1 and 2, wherein the intermediate portion has an expansion / contraction ratio of at least 200% at the maximum extension.   The disposable diaper according to any one of claims 1 to 3, wherein the fastening portion is folded inward in the middle, and the folded surface is attached by joining the mating surfaces of the inner surfaces with a predetermined width at the folded portion.   The disposable diaper according to any one of claims 1 to 4, wherein the joining means of the fastening portion is a mechanical joining type fastening tape.

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