JP2010104654A - Pants-type disposable diaper and method of wearing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper easy to wear and a method of wearing the same. <P>SOLUTION: The disposable diaper has at least one set of right and left seal intermittent parts 41 and 41 in the middle of a side seal part 40. The front body and the rear body of the diaper can be easily turned up along the waistline with the seal intermittent parts 41 and 41 as folding line positions S1 and S2, and length in the longitudinal direction of the diaper of each side seal part 42 divided by the seal intermittent part 41 is not more than 60 mm. When the diaper is worn, the turned-up parts are held by hand while the front body and rear body are turned up along the waistline with the seal intermittent parts 41 and 41 as the folding line positions S1 and S2, and the opening of the waist part is expanded to wear the diaper. After wearing the diaper, the turned-up parts are developed to wear the diaper. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a pants-type disposable diaper that is easy to loosen by folding back a front body and a back body from a waist opening when the diaper is mounted, and a method for mounting the same.

  Conventionally, an absorbent main body in which an absorbent body is interposed between a liquid-permeable top sheet and a back sheet, and integrally joined with the absorbent main body, constituting at least a front body and a back body, In each region of the front body and the back body, it is composed of an exterior sheet in which a large number of elastic elastic members are disposed along the waist part and the waist part, and the front body and the back body of the exterior sheet are at both side ends. A pants-type disposable diaper is known in which a waist opening and a pair of left and right leg openings are formed by being joined at the side seal portion.

  Such a disposable diaper ensures fit around the waist and torso to prevent the diaper from slipping down, and covers the waist from the abdomen of the wearer to some extent to prevent leakage from around the waist. There is a need. For this reason, the longitudinal direction length of the diaper side part from the upper end of a leg opening part to a waist opening part is formed long to some extent.

  In this way, it is necessary to ensure that the length of the diaper side of the diaper of the front body and the back body is long in order to ensure the function of the diaper. There was a problem that it was hard to leave a diaper.

  In recent years, various types of diapers have been developed from the viewpoint of easy mounting. For example, in the following Patent Document 1, a waist opening is provided with an elastic contraction member, and a waist flap having a highly frictional member is formed on the inner surface thereof. The waist flap is folded back outward by a certain width and temporarily held. A pants-type diaper in a state is disclosed.

Moreover, in the following patent document 2, it is a disposable diaper which has a pair of expansion-contraction body extended and arrange | positioned to the outer side of a longitudinal direction, Comprising: After mounting | wearing a diaper, the said expansion-contraction body is folded over on an absorptive main body and used. In order to be able to do so, a disposable diaper is disclosed in which the stretchable body extends a sufficient length outward from the edge of the absorbent main body.
JP 2003-305083 A JP-A-10-52456

  However, in the diaper described in Patent Document 1, a waist flap having a high friction member is used in order to prevent the high friction member provided inside the waist opening from contacting the skin surface of the body and causing resistance. It is designed to be folded outward by a certain width, and does not solve the problem that the waist part of the diaper is caught by the legs and buttocks when worn. Further, if the length of the waist portion in the diaper longitudinal direction is long, the waist opening is difficult to expand when the diaper is worn, so that the waist opening is difficult to expand, and the legs and the buttocks are often caught.

  Furthermore, in the diaper described in Patent Document 1, temporary fixing is performed to stabilize the temporary holding state in which the waist flap is folded back. However, when the diaper is worn and the side portion is gripped and pulled upward, the diaper is attached during wearing. When it is caught on the body, it can be assumed that the hand is caught by the folded waist flap and the temporary fixing is released. For this reason, when the diaper is mounted, it is important that the diaper is lifted by another method, rather than picking up the upper part of the side part by hand.

  On the other hand, in the diaper described in Patent Document 2, the stretchable body forming the opening around the waist extends outward in the longitudinal direction along the edge at the longitudinal end of the absorbent main body, and one end thereof is Since there is almost no arrangement of the stretchable body on the upper part of the absorbent body, the stretchable body is not obstructed by expansion and contraction as a whole, has excellent stretchability, and has a large opening around the legs, so that the wearer can put on and take off However, since the stretchable body forming the opening around the waist extends to the outside in the longitudinal direction of the diaper, the stretchable body is provided with a leg or buttocks when worn. The problem that it is difficult to get caught is not solved.

  Then, the main subject of this invention is providing the underpants type disposable diaper which made it easy to put at the time of mounting | wearing, and its mounting | wearing method.

In order to solve the above-mentioned problem, as the present invention according to claim 1, an absorbent main body in which an absorbent body is interposed between a liquid-permeable top sheet and a back sheet, and the absorbent main body are integrally joined. In addition, the front body and the back body constitute at least the front body and the back body, and each of the front body and the back body is composed of an exterior sheet in which a large number of elastic elastic members are disposed along the waist part and the waistline part, In the pants-type disposable diaper in which the waist opening and the pair of left and right leg openings are formed by joining the front body and the back body of the exterior sheet at the side seal portions at both ends,
In the middle of the side seal part, there is at least one or more seal intermittent parts with one set on the left and right sides, and the front body and the back body can be easily folded along the trunk around the seal intermittent part as a fold line position. In addition, a pants-type disposable diaper is provided in which the length of each side seal portion separated by the intermittent seal portion in the longitudinal direction of the diaper is 60 mm or less.

  In the first aspect of the present invention, in the middle of the side seal portion, there are at least one or more seal intermittent portions as a pair on the left and right sides, and the front body and the back body are located at the folding line position. Since it is easy to fold along the periphery of the trunk, the front body and the back body can be easily folded at the fold line position when worn. That is, since the seal intermittent portion is thin and has no waist, it can be easily folded back. For this reason, it becomes easy to hold when the diaper is worn, and the entire diaper opening is easily expanded just by pulling the diaper on both sides, so that it is difficult to be caught on the legs and buttocks. Therefore, compared to a conventional diaper that is worn with the front and back bodies stretched, it can be made easier without being caught by the legs and buttocks. Further, since the seal intermittent portion is thin and has no waist, the folded state is easily maintained, and the folded state is difficult to be released during the mounting operation.

  Here, considering that the thumb length of an adult female hand is approximately 50 to 60 mm, in the present invention, the length in the diaper longitudinal direction of each side seal portion partitioned by the intermittent seal portion is 60 mm or less. . For this reason, it becomes easy to hook the folded portion on the finger of the hand such as the thumb when wearing, and even a woman or a handicapped person can easily attach the diaper opening by expanding the diaper opening without using much grip force. .

  According to a second aspect of the present invention, there is provided the pant-type disposable diaper according to the first aspect, wherein the intermittent seal portion is formed with a length of 5 mm or more and 10 mm or less at an outer edge position of the side seal portion.

  In the second aspect of the invention, the length of the seal intermittent portion in the longitudinal direction of the diaper is defined, and it is preferable that the length is 5 mm or more and 10 mm or less at the outer edge position of the side seal portion.

  As the present invention according to claim 3, the side seal portion is formed in a pattern in which continuous linear or arbitrary dot-shaped seals are arranged at a small interval in the diaper longitudinal direction. A pants-type disposable diaper is provided.

  In the invention according to the third aspect, the seal pattern of the side seal portion is defined, and any of a pattern in which continuous linear or arbitrary dot-shaped seals are arranged at small intervals in the diaper longitudinal direction may be used. The “small interval” is an interval of less than 5 mm, preferably 0.5 to 2 mm, in relation to the intermittent seal portion.

  As for this invention which concerns on Claim 4, the said elastic elastic member is cut | disconnected so that most of the area | regions which overlap with the said absorber may not shrink | contract in the trunk periphery direction, The pants type disposable in any one of Claims 1-3 Diapers are provided.

  The invention according to claim 4 is specified because the wrinkle in the longitudinal direction of the diaper may interfere with the absorbent body when the shrinkage force in the diaper width direction acts on the region overlapping with the absorbent body. In this structure, most of the elastic stretchable member in this region is cut to be discontinuous, and the stretchability in the waistline direction is not given.

  As the present invention according to claim 5, two fold line positions are provided at intervals in the diaper longitudinal direction, and the length in the diaper longitudinal direction of each side seal part separated by the seal intermittent part is the fold line position. The length of the side seal part located between is formed longer than the length of the side seal part closest to the waist opening and the length of the side seal part closest to the leg opening. 4. A pants-type disposable diaper according to any one of 4 is provided.

  In the invention according to claim 5, when two fold line positions are provided in the diaper longitudinal direction, the diaper longitudinal length of each side seal part delimited by the intermittent seal part is defined. The length of the side seal part located between the length of the side seal part closest to the waist opening (the side seal part between the upper fold line position and the upper waist opening) and the leg opening It is formed longer than the length of the closest side seal part (side seal part between the lower fold line position and the lower leg opening). As a result, when folded back at each folding line position, the side seal part located between the folding line positions is located on the outermost side in the state after folding, and the length of this part in the longitudinal direction of the diaper By forming a longer than the other portions, the folded state can be easily maintained, and the folded state can be made difficult to be released even during the mounting operation.

  As the present invention according to claim 6, there is provided the pants-type disposable diaper according to any one of claims 1 to 5, wherein the elastic elastic member is not disposed in a belt-like region along the circumference of the trunk corresponding to the intermittent seal portion. Provided.

  In the invention described in claim 6, in order to facilitate folding at the fold line position, no elastic elastic member is provided in the belt-like region along the periphery of the trunk corresponding to the intermittent seal portion provided at each fold line position. I did it. The “strip-shaped region along the periphery of the trunk corresponding to the intermittent seal portion” may include at least a strip-shaped region formed along the periphery of the diaper in the longitudinal direction of the seal intermittent portion. The area may be larger than the band-like area.

  According to a seventh aspect of the present invention, there is provided the pants-type disposable diaper according to any one of the first to sixth aspects, wherein the intermittent seal portion is formed by a notch formed in the side seal portion.

  As the present invention according to claim 8, there is provided the pants-type disposable diaper according to any one of claims 1 to 6, wherein the seal intermittent portion is formed by an unsealed portion.

  The inventions according to claims 7 and 8 define means for forming the seal intermittent portion, and can be formed by notches or unsealed portions.

  According to a ninth aspect of the present invention, in the belt-shaped region along the periphery of the trunk corresponding to the intermittent seal portion, the rigidity of the absorbent body in the diaper longitudinal direction is 20 cN / 50 mm or less. A pants-type disposable diaper is provided.

  In the invention according to claim 9, when the folding line position overlaps with the absorber, it can be easily folded back from the folding line position together with the absorber. In the belt-like region, the rigidity of the absorber in the longitudinal direction of the diaper is set to 20 cN / 50 mm or less.

  As the present invention according to claim 10, in the band-like region along the periphery of the trunk corresponding to the intermittent seal portion, the absorber is formed thinner than other portions or no absorber exists. A pants-type disposable diaper according to any one of 8 is provided.

  In the invention according to claim 10, in the case where the folding line position overlaps with the absorber, the belt-like region along the periphery of the trunk corresponding to the intermittent seal portion can be easily folded back from the folding line position. The absorber is formed thinner than other portions, or the absorber is not present.

  As the present invention according to claim 11, the pants type according to any one of claims 1 to 8, wherein the absorber is not present on the waist opening side from the seal intermittent portion position closest to the leg opening. A disposable diaper is provided.

  In the invention of the eleventh aspect, the absorber is not present on the waist opening side (upper side) from the seal intermittent portion position (lowermost folding line position) closest to the leg opening. Thereby, the folding at the folding line position is facilitated regardless of the absorber, and a more compact product state can be achieved.

  As for the present invention according to claim 12, when the pants-type disposable diaper according to any one of claims 1 to 11 is mounted, the front body and the back body are folded back along the trunk circumference with the seal intermittent portion as a fold line position. Wearing the pants-type disposable diaper characterized in that it is attached by the procedure of 1 step, the second step of picking the folded portion by hand and expanding the opening of the waist portion, and the third procedure of expanding the folded portion A method is provided.

  The invention according to claim 12 is the method for attaching the pants-type disposable diaper according to any one of claims 1 to 11, specifically, the front body and the back body with the seal intermittent part as a fold line position. In the state of being folded along the circumference of the trunk, the folded portion is picked by hand, the opening of the waist portion is expanded and attached, and then the folded portion is expanded. Thus, since the waist opening is widened by picking the folded portion by hand, it is easy to hold and apply force, and the diaper is easily spread sideways. For this reason, it becomes difficult to get caught in a leg and a buttocks, and it can be set as the attachment method which is easy to put.

  The present invention according to claim 13 is the pants-type disposable diaper according to claim 12, wherein two folding line positions are provided in the longitudinal direction of the diaper and are folded outward from the waist opening at each folding line position when worn. A mounting method is provided.

  The present invention according to claim 14 is the underpants type according to claim 12, wherein two folding line positions are provided in the longitudinal direction of the diaper and are folded back from the waist opening at the folding line position into a cross-sectional Z shape at the time of wearing. A method of wearing a disposable diaper is provided.

  In the inventions described in the above paragraphs 13 and 14, the folding method is defined when two folding line positions are provided in the longitudinal direction of the diaper. In claim 13, folding is performed outward at each folding line position. It is folded back in a Z shape.

  As described above in detail, according to the present invention, it is possible to provide a disposable diaper that is easy to use at the time of wearing and a method for wearing the disposable diaper.

  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 “diaper width direction” is a direction orthogonal to the longitudinal direction (diaper Means the horizontal direction when unfolding.

  FIG. 1 is a product state appearance view of a pants-type disposable diaper 1 according to the present invention, FIG. 2 is a development view thereof, FIG. 3 is a view taken along line III-III, and FIG. FIG. In addition, the adhesion | attachment site | part is clearly shown by x mark in the required site | part of drawing.

  A pants-type disposable diaper 1 according to the present invention (hereinafter simply referred to as a diaper) is made of a cotton-like pulp between a liquid-permeable surface sheet 11 made of a nonwoven fabric or the like and a leak-proof sheet 12 made of polyethylene or the like. The absorbent main body 10 interposing the absorbent body 13 and the absorbent main body 10 are integrally joined to form at least the front body F and the back body B, and each of the front body F and the back body B The outer sheet | seats 20 and 30 which are arrange | positioned separately in the area | region and in which many elastic elastic members were arrange | positioned along a waist part and a trunk periphery part between the upper layer nonwoven fabric and the lower layer nonwoven fabric are comprised. Then, the front body F and the back body B of the exterior sheets 20 and 30 are joined at the side seal portions 40 and 40 on both sides, thereby forming a waist opening WO and a pair of left and right leg openings LO and LO. It has become a pants type.

  In the diaper 1 according to the present invention, the outer sheet is provided with a plurality of elastic elastic members 26, 28, ... at least along the waist portion 23 and the waistline portion 24 between the upper layer nonwoven fabric 21A and the lower layer nonwoven fabric 21B, A large number of elastic elastic members 25 along the waist portion 21 and the waistline portion 22 between the rear body exterior sheet 20 joined to the rear body B side of the absorbent main body 10, and the upper nonwoven fabric 31A and the lower nonwoven fabric 31B, 27 ... is arranged, and is constituted by a two-divided sheet comprising a front body exterior sheet 30 joined to the front body F side of the absorbent main body 10.

  The diaper 1 has at least one or more seal intermittent portions 41, 41, and in the illustrated example, two sets of seal intermittent portions 41 in the middle of the side seal portion 40. The seal intermittent portions 41 and 41 are set to the folding line positions S1 and S2, and the front body and the back body are easily folded back along the waist. Furthermore, the diaper longitudinal direction length of each side seal part delimited by the seal intermittent part 41 is 60 mm or less.

Hereinafter, the structure of the absorptive main body 10 and the exterior sheets 20 and 30, the folded structure, and the mounting method and assembly structure of the diaper 1 will be described in order.
(Structure of 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, a shape formed with a substantially square shape in plan view is used, and the width dimension is a dimension width that does not give the wearer a feeling of gore 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 the encapsulating sheet 14, the hydrophilicity of the sheet is not particularly limited as long as at least the surface side (skin contact surface side) of the absorbent body 13 is not water-repellent.

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 that forms 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 that is 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, a plurality of thread-like elastic elastic members 16, 16... Are disposed at the standing tip side portion, and in the vicinity of the side edge portion of the absorbent body 13. A thread-like elastic expansion / contraction member 17 is disposed, and a thread-like elastic expansion / contraction 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. 17 and 18, as shown in the product state diagram of FIG. 5, mainly due to its elastic expansion and contraction force, the side portion of the absorber 13 is bent, and the base end side portion of the three-dimensional gather BS is formed by the side portion of the absorber 13. It is for composition. The standing height HL of the absorber 13 from the bent portion to the absorber side edge is 5 to 30 mm, preferably 20 to 30 mm. When the standing height HL is less than 5 mm, it is too short to make it difficult to bend the absorber side, and it is impossible to ensure sufficient fit to the skin. Further, when the standing height HL exceeds 30 mm, there arises a problem that the standing length is too long to bend effectively.

  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. Furthermore, with respect to the gathered nonwoven fabric 16, in order to prevent permeation of urine and the like, to prevent fogging, and to enhance the touch to the skin (dry feeling), silicon-based, paraffin metal-based, alkylchromic croid-based water repellent You may use the water-repellent treatment nonwoven fabric which coated etc.

  Further, as shown in FIGS. 3 and 6, a crotch outer sheet 19 is disposed on the outer surface of the absorbent main body 10 in the crotch part between the rear body outer sheet 20 and the front body outer sheet 30. It is preferable to do. In this case, the crotch outer sheet 19 is made of the same material as the lower layer nonwoven fabrics 21B and 31B of the rear body outer sheet 20 and the front body outer sheet 30. Thereby, the boundary between the crotch outer sheet 19, the rear body outer sheet 20, and the front body outer sheet 30 becomes inconspicuous. The crotch outer sheet 19 may be made of a material different from the lower layer nonwoven fabrics 21B and 31B of the rear body outer sheet 20 and the front body outer sheet 30. Since the crotch outer sheet 19 located in the crotch 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 19, the crotch outer sheet 19 and the leak-proof sheet 12 are integrated by embossing from the outer surface side of the crotch outer sheet 19. It can be designed. The crotch outer sheet 19 may be provided over the entire length of the absorbent main body 10, but the crotch part is connected to the rear body outer sheet 20 and the front body outer sheet 30 that are spaced apart from each other. It is preferable to provide only.

(Structure of exterior sheets 20 and 30)
The outer body sheet 20 for the back body includes two upper layer nonwoven fabrics 21A and 21B nonwoven fabrics 21B made of nonwoven fabric and the like, and waist elastic elastic members 26 and 26 arranged and fixed at least around the waist opening 23 between them. And a plurality of waist elastic elastic members 28, 28, which are arranged and fixed under extension along the horizontal direction at intervals in the vertical direction of the waist portion 24. 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.

  The front body exterior sheet 30 includes two upper-layer nonwoven fabrics 31A and lower-layer nonwoven fabrics 31B made of nonwoven fabric and the like, and at least waist elastic elastic members 25, 25,. A plurality of waist elastic elastic members 27, 27,... Arranged along the horizontal direction at intervals in the vertical direction of the peripheral portion 22. In addition, concave leg-around lines 39, 39 for forming leg openings are formed at portions corresponding to both sides of the diaper middle.

  The constituent materials of the upper nonwoven fabrics 21A and 31A and the lower nonwoven fabrics 21B and 31B include synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, and natural materials such as cotton. A nonwoven fabric obtained by an appropriate processing method such as a spunbond 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.

  The upper layer nonwoven fabric 21A and the lower layer nonwoven fabric 21B are preferably bonded with a hot melt adhesive or the like over substantially the entire surface of the region where the elastic elastic member is 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.

(About the folded structure)
In the present invention, in order to facilitate the folding at the folding line positions S1 and S2 or to maintain the folded state at the folding line positions S1 and S2, the diaper 1 is configured in various forms as follows. Can do.

  First, the structure of the side seal portion 40 will be described in detail. The rear body exterior sheet 20 and the front body exterior sheet 30 are fused or hot-melt bonded on both sides, such as heat seal or ultrasonic seal. It joins by the adhesion | attachment means by an agent, and this junction part is made into the side seal parts 40 and 40. FIG. The side seal portion 40 can be formed in a pattern in which continuous linear or dot-shaped seals are arranged at small intervals in the diaper longitudinal direction. In the case of a dot-shaped seal, the dot shape may be any shape such as a figure such as a rectangle, rhombus, circle, ellipse, or triangle, or a symbol or character. The small interval is specifically less than 5 mm, and preferably 0.5 to 2 mm. In the example shown in FIG. 7, the side seal portion 40 is formed in a pattern in which rectangular dot-shaped seals are connected at a small interval.

  And in this invention, as FIG. 7 shows, it has at least 1 or more seal | sticker intermittent parts 41 in the middle of the said side seal part 40 as a pair, and this seal | sticker intermittent part is made into a fold line position, and the said The front body and the back body are easily formed from the waist opening WO along the periphery of the trunk. Further, the side seal portion 40 has a length of the diaper longitudinal direction of each side seal portion 42... Divided by the intermittent seal portion 41 is 60 mm or less, more preferably 50 mm or less. With this, when the diaper is worn, the front and back bodies are 60 mm or less by folding back at the folding line position, and the folded part can be easily picked by hand, and can be easily spread on both sides, making it easy to spread. it can.

  Here, the reason why the length of the diaper in the longitudinal direction of the front body and the back body after being folded is 60 mm or less is as follows. In other words, since the length of the diaper in the front and back of the diaper is long in the past, both sides of the waist opening must be grasped with both hands. In this state, it is not easy to expand the waist opening to the outside. In addition, since the length of the front and back diapers in the longitudinal direction is long, they are often caught on the legs and buttocks. For this reason, as a result of various studies to make the diaper easy to use, the inventor folded the front and back bodies to shorten the length of the diaper in the longitudinal direction, and hooked both sides of the folded portion to fingers such as the thumb. It has been found that the diaper can be easily expanded just by spreading it on both sides, making it difficult to catch on the legs and buttocks. Here, since the length of the thumb of an adult woman is about 50 mm to 60 mm, in the present invention, the length from the leg opening after being folded back to the upper end of the diaper is set to 60 mm or less. As a result, women and people with disabilities can expand diapers without using much grip.

  With respect to the length of the side seal portion of a general diaper, the fold line position defines the length of the side seal section 42 of each side seal portion divided by the seal intermittent portion 41 to 60 mm or less. In relation, it is preferable that two or more are provided along the circumference of the trunk from the waist opening. In the illustrated example, two folding line positions S1 and S2 are provided assuming a diaper for infants.

  The intermittent seal portion 41 is preferably formed with a length of 5 mm or more and 10 mm or less at the outer edge position of the side seal portion 40. That is, when the side seal portion 40 is formed in a pattern in which arbitrary dot-shaped seals are connected at a small interval if it is less than 5 mm, it is difficult to distinguish from this small interval. The function of the side seal part 40 may be impaired.

  In the example shown in FIG. 7 and the like, the intermittent seal portion 41 is formed by the notches formed in the side seal portion 40 after forming the side seal portions 40 and 40 over the entire length of both sides of the exterior sheets 20 and 30. Can be formed. In the illustrated example, the seal intermittent portion 41 is formed in a triangular shape that narrows inward from both side edges. However, the shape is not limited to this shape, and the seal intermittent portion 41 may be formed in a quadrangular shape, a semicircular shape, or the like.

  Further, the intermittent seal portion may be formed by an unsealed portion 41 ′ of the side seal portion 40 as shown in FIG. 8. In this case, it is not necessary to provide the notch, but it is preferable to provide the notch in the unsealed portion 41 ′ because it is easier to return.

  In the folding method, as shown in FIG. 9 (A), after folding outward at the folding line position S1 from the waist opening WO, the folded portion is folded as shown in FIG. 9 (B). Folded further outward at position S2, and the state after folding shown in FIG.

  At this time, as shown in FIG. 10, the cross-sectional shape of the folded portion is wound in a spiral shape so that the waist portions 21 and 23 are on the innermost side. For this reason, according to such a folding method, the folded state is maintained and is not easily released.

  As another folding form, by folding back from the waist opening WO at the folding line position S1 and folding outward at the folding line position S2, as shown in FIG. Also good. This makes it easier to stretch the folded portion after the diaper is mounted.

  On the other hand, in the present diaper 1, as shown in FIG. 7 and the like, the elastic stretchable members 27 and 28 disposed in the waistline portions 22 and 24 are substantially in the waistline direction in the majority of the region overlapping the absorber 13. It is preferable to cut so as not to shrink. Thereby, the wrinkle of the diaper longitudinal direction becomes difficult to the absorber 13, and the return | turnback from folding line position S1, S2 becomes difficult to be inhibited.

  Further, the rigidity of the absorbent body 13 in the longitudinal direction of the diaper is suitably about 5 to 35 cN / 50 mm, but at least in the band-like region along the periphery of the trunk corresponding to the seal intermittent portion 41, it is 20 cN / 50 mm or less. The folding line positions S1 and S2 are particularly preferable because they are easy to bend. The rigidity of the absorbent body 13 in the longitudinal direction of the diaper may be 20 cN / 50 mm or less as a whole, but only the belt-like region along the periphery of the trunk corresponding to the seal intermittent portion 41 has a low rigidity of 20 cN / 50 mm or less. It may be a part. When the high rigidity portion and the low rigidity portion are provided in this way, the high rigidity portion has a rigidity of 15 to 50 cN / 50 mm, preferably 20 to 35 cN / 50 mm, and the low rigidity portion has a rigidity of 2 to 20 cN / 50 mm, preferably Is 2 to 15 cN / 50 mm.

  Stiffness (rigidity) is measured by the following method in accordance with JIS K 7171 (Plastic-Bending stiffness test method). For the measurement, a Tensilon tester (curvature radius R1 = 5.0 ± 0.1 mm at the tip of the indenter, curvature radius R2 = 5.0 ± 0.2 mm at the tip of the support plate) was used in the longitudinal direction of the product of the interior body. Measure the bending stiffness. The test piece is prepared by removing the elastic elastic member that affects the measurement from the interior body and cutting it into a rectangle with a diaper longitudinal direction of 80 mm and a diaper width direction of 50 mm. 50 mm in the unit of the flexural rigidity value is the length of the short side of the test piece, and is the width of the test piece bent with the indenter at the time of the test. Each test piece is placed on a pair of support plates, each having an arcuate cross-sectional tip, and the gap between the tips (upper ends) of both tips is aligned. The indenter tip is placed so as to be stretched over in the orthogonal direction and slightly in contact with the test piece. A load-deflection curve is obtained by lowering the indenter under the conditions of a load cell of 5 kg (range 196 cN) and a speed of 30 mm / min. Let the maximum value of the obtained bending stress be a bending rigidity value (cN / 50 mm).

  In the present diaper 1, as shown in FIG. 12, the absorber 13 is formed thinner than other portions in the band-like regions S <b> 1 a and S <b> 2 a corresponding to the seal intermittent portion 41, or the absorber 13 can be absent. As a result, even when the folding line positions S1 and S2 are provided on the absorber 13, the folding line positions S1 and S2 can be easily folded back, and as shown in FIG. And since the absorber 13 (shaded part) exists in the folding | returning part of a back body, it will become easy to hold | maintain a folding state. Furthermore, since the absorber 13 can be interposed up to the upper part of the diaper, it also prevents leakage. Alternatively, the absorber at the folding line positions S1 and S2 is provided by providing a linear emboss that crosses the absorber 13 in the horizontal direction in the belt-like regions S1a and S2a along the periphery of the trunk corresponding to the seal intermittent portion 41. 13 can be easily bent.

  On the other hand, in the present diaper 1, as shown in FIG. 14, it is possible to prevent the absorber 13 from being present on the waist opening side WO from the position of the seal intermittent portion 41 closest to the leg opening LO. That is, the absorber 13 is not interposed above the lowermost intermittent seal portion 41. Thereby, since the absorber 13 does not intervene in folding line position S1, S2, it becomes easy to return | fold, becomes a more compact product state, and becomes convenient for carrying around.

  In the present diaper 1, as shown in FIG. 1 and the like, it is desirable that the elastic elastic members 25 to 28 are not disposed in a belt-like region along the circumference of the trunk corresponding to the intermittent seal portion 41. Thereby, in the folding line positions S1 and S2, the wrinkles in the vertical direction due to the contraction of the elastic elastic member are reduced, and the folding at the folding line position is hardly hindered. In addition, when the length of the diaper longitudinal direction of the said seal | sticker intermittent part 41 shall be 5-10 mm, it is preferable that the area | region width which does not arrange | position an elastic expansion-contraction member shall be 10-15 mm.

  In the present diaper 1, as shown in FIG. 15 (A), the tension of the elastic elastic member immediately below the folding line position S1 can be set relatively tighter than the other portions. As a result, when folded, as shown in FIG. 5B, the tension at the outer lower end of the folded portion is the tightest, and the folded portion can be fixed.

  In the present diaper 1, the folding line positions S1 and S2 can be easily recognized by coloring the elastic elastic members above and below the folding line positions S1 and S2.

  Incidentally, as shown in FIG. 16, it is preferable that the upper end portion 40a of the side seal portion 40 is cut off obliquely. As a result, the upper end of the side seal portion 40 is free of crumbs, so that the diaper is not easily torn when folded. Further, when the side seal portion 40 is torn when the diaper is detached, the seal width at the position where tearing starts is narrow, so that the force required to start tearing can be reduced and workability is improved.

(Diaper 1 wearing method)
Next, a method for attaching the diaper 1 will be described with reference to FIG. First, as shown in FIG. 17A, the front body and the back body of the diaper 1 are folded back around the torso with the seal intermittent portions 41 and 41 as fold line positions. Next, as shown in FIG. 5B, the folded portion is picked by hand, and the waist portion is widened and the diaper is pulled up to the waist through the leg. Thereafter, as shown in FIG. 3C, the folded portion is expanded to cover the abdomen. Here, when it is desired to wear the diaper with a short crotch, the diaper may be worn with an appropriate width.

  Further, as shown in FIG. 18, when the front and rear bodies of the diaper 1 are folded along the torso with the seal intermittent portions 41 and 41 as the folding line positions, the outer side of the last folded end and the diaper 1 The folded state may be temporarily fixed by providing a tape material such as post-processing tape T or emblem over the outside of the tape. The post-treatment tape T is a diaper by extending the diaper after being rounded down at the time of disposal, and fastening the fastening portion provided at the tip of the free end to an arbitrary location beyond the trunk opening. This prevents the rounded state from being released.

(Diaper assembly)
As shown in FIG. 6, the absorbent main body 10, the rear body exterior sheet 20, and the front body exterior sheet 30 are formed on the upper surface side of the rear body exterior sheet 20 and the front body exterior sheet 30. 10 are bonded and integrated by an adhesive such as hot melt. Then, the absorbent main body 10 is folded in the front-rear direction, and the side seal portions 40, 40 of the front body F and the side seal portions 40, 40 of the rear body B are joined by heat welding or hot melt adhesive or the like. The pant-type diaper 1 shown in FIG. 1 is assembled. Thereafter, the side seal portion 40 is notched or the like in the seal intermittent portion 41 as necessary.

  The diaper 1 may be folded in the front body and the back body in a product state, or may be in a state where it is not folded back. When folded in the product state, the crotch portion of the diaper is folded and inserted into the folded portion, so that it can be compactly put together.

  Further, in the present diaper 1, when folded in the product state, the inner side of the final folded end and the outer surface of the diaper 1 are bonded by a heat seal or ultrasonic seal or the like, or bonded by a hot melt adhesive. May be temporarily joined. As a result, the folded state can be maintained. It is preferable to provide this temporary joining part in one or more discrete forms in the front body and the back body.

[Other examples]
(1) In the above embodiment, the outer sheet 20 is a two-layer nonwoven fabric sheet in which the upper nonwoven fabric 21A and the lower nonwoven fabric 21B are bonded with a hot-melt adhesive or the like. The structure of the exterior sheet can be arbitrarily adopted.
(2) In the above embodiment, the exterior sheet is provided separately for the front body exterior sheet 30 and the back body exterior sheet 20, but the exterior sheet is integrally provided from the front body F to the back body B. It may be a thing.

BRIEF DESCRIPTION OF THE DRAWINGS It is a product state external view of the underpants type disposable diaper 1 which concerns on this invention. It is the development view. It is the III-III arrow directional view of FIG. It is the IV-IV arrow line view of FIG. It is the III-III line arrow directional view of FIG. 2 in a product state. It is a disassembled perspective view of the absorptive main body 10, the back body exterior sheet 20, and the front body exterior sheet 30. (A) is the product state external view of the diaper 1, (B) is the VII section enlarged view. It is the VII section enlarged view of FIG. 7 (A) which shows the diaper 1 of another form. It is a product state appearance figure showing the return procedure of diaper 1. It is sectional drawing (the 1) of a folding | turning part. It is sectional drawing (the 2) of a folding | turning part. It is a product state external view which shows the diaper 1 of another form. It is a product-state external view of the folded state of the diaper 1 of FIG. It is a product state external view which shows the diaper 1 of another form. (A) is the product state external view which shows the diaper 1 of another form, (B) is the product state external view of the folded state. It is the VII section enlarged view of FIG. 7 (A) which shows the diaper 1 of another form. It is a procedure figure showing the wearing procedure of diaper 1. It is a product state appearance figure showing the return state of diaper 1 of other forms.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Disposable diaper (diaper), 10 ... Absorbent main body, 11 ... Surface sheet, 12 ... Leak-proof sheet, 13 ... Absorber, 14 ... Encapsulated sheet, 15 ... Gathered nonwoven fabric, 16-18 ... String-like elastic elastic member, 20 ... Exterior sheet for back body, 21A / 31A ... Upper layer nonwoven fabric, 21B / 31B ... Lower layer nonwoven fabric, 21/23 ... Waist portion, 22.24 waist circumference portion, 25.26 ... Waist portion elastic elastic member, 27.28 ... Elastic waist elastic member, 29.39 ... leg circumference line, 30 ... front body exterior sheet, 40 ... side seal part, 41 ... seal intermittent part, S1, S2 ... folding line position, LO ... leg opening, WO ... Waist opening

Claims (14)

An absorbent main body in which an absorbent body is interposed between a liquid-permeable top sheet and a back sheet, and is integrally joined to the absorbent main body to constitute at least a front body and a back body, and a front body and In each region of the back body, it is composed of an exterior sheet in which a large number of elastic elastic members are disposed along the waist and the waist part, and the front body and the back body of the exterior sheet are side seals on both sides. In a pants-type disposable diaper in which a waist opening and a pair of left and right leg openings are formed by being joined at a part,
In the middle of the side seal part, there is at least one or more seal intermittent parts with one set on the left and right sides, and the front body and the back body can be easily folded along the trunk around the seal intermittent part as a fold line position. A pants-type disposable diaper characterized in that each side seal part divided by the intermittent seal part has a length in the longitudinal direction of the diaper of 60 mm or less.   The pants-type disposable diaper according to claim 1, wherein the intermittent seal portion is formed with a length of 5 mm or more and 10 mm or less at an outer edge position of the side seal portion.   The pants-type disposable diaper according to any one of claims 1 and 2, wherein the side seal portion is formed in a pattern in which continuous linear or arbitrary dot-shaped seals are arranged at a small interval in the diaper longitudinal direction.   The pants-type disposable diaper according to any one of claims 1 to 3, wherein the elastic stretchable member is cut so that most of a region overlapping with the absorber does not contract in a waistline direction.   Two fold line positions are provided at intervals in the diaper longitudinal direction, and the diaper longitudinal length of each side seal part partitioned by the intermittent seal part is the length of the side seal part located between the fold line positions. 5. The pants-type disposable according to claim 1, wherein the length of the side seal part closest to the waist opening and the length of the side seal part closest to the leg opening are formed. Diapers.   The pants-type disposable diaper according to any one of claims 1 to 5, wherein the elastic stretchable member is not disposed in a belt-like region along the periphery of the trunk corresponding to the intermittent seal portion.   The pants-type disposable diaper according to claim 1, wherein the intermittent seal portion is formed by a notch formed in the side seal portion.   The pants-type disposable diaper according to any one of claims 1 to 6, wherein the intermittent seal portion is formed by an unsealed portion.   The pants-type disposable diaper according to any one of claims 1 to 8, wherein a rigidity of the absorbent diaper in the longitudinal direction of the absorbent body is 20 cN / 50 mm or less in a belt-like region along the periphery of the trunk corresponding to the intermittent seal portion.   The pants-type disposable according to any one of claims 1 to 8, wherein the absorber is formed thinner than other portions in the band-like region along the periphery of the trunk corresponding to the seal intermittent portion, or the absorber is not present. Diapers.   The pants-type disposable diaper according to any one of claims 1 to 8, wherein the absorber does not exist on the waist opening side of the seal intermittent part position closest to the leg opening.   A first procedure of turning back the front body and the back body along the waist with the intermittent seal portion as a fold line position when attaching the pants-type disposable diaper according to any one of claims 1 to 11, and manually turning the folded portion. A mounting method for a pants-type disposable diaper, characterized in that it is mounted by a procedure of a second procedure of picking and expanding an opening of a waist portion and a third procedure of expanding the folded portion.   The wearing method of the underpants type disposable diaper according to claim 12, wherein two folding line positions are provided in the longitudinal direction of the diaper, and are folded outward from the waist opening at each folding line position when worn.   The wearing method of the underpants type disposable diaper according to claim 12, wherein two folding line positions are provided in the longitudinal direction of the diaper, and are folded back in a cross-sectional Z shape from the waist opening at the folding line position when worn.

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