JPH0653962B2 - Disposable absorbent pants and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to disposable absorbent pants formed into a complete pants type in advance for use as diapers for infants, so-called training pants, diapers for incontinent persons, and the like. Concerned.

(Prior Art) Conventionally, a disposable absorbent pants having a complete pants type and having elastic members in a waistband and a pair of leg holes has been disclosed in JP-A-58-115107.

(Problems to be Solved by the Invention) According to the above-mentioned pants of the related art, between the water-permeable topsheet and the water-impermeable backsheet having the same shape as the horizontal rectangle having the size forming the front body and the back body. , With a space in the central region between these laterally opposite ends, with respective absorbent cores for the front body and the back body interposed, the waist band elastic member at the upper end of the back seat, and the leg hole at the lower end thereof. By forming a laminated body by adhering each of the elastic members, bending the laminated body around the space portion, and joining the front body and the back body at the lower end between the space portion and the opposite end. , Is formed in a pants type. However, the pants formed in this way have the advantage of being easy to manufacture, but not only the absorbent function of the front body and the back body of the crotch is intermittent and not only the problem of absorption function, but also the front body The central joint between the back and the back will be located in the crotch. However, since the crotch joint receives the strongest tensile force due to the movement of the wearer's legs, the joint is separated or damaged, the pants function is lost, and excrement leaks, and the joint is worn by the wearer. There is a problem that it gives an unpleasant and uncomfortable feeling.

An object of the present invention is to provide a disposable absorbent pants that can solve the above problems by a very simple means.

(Means for Solving Problems) In the present invention, a pants body has a water-permeable topsheet in contact with the wearer's skin, a water-impermeable backsheet located on the opposite side of the topsheet, and both sheets. It is assumed that the disposable absorbent pants include an absorbent core interposed between the waist band and the pair of leg holes and elastic members respectively.

In the present invention, in the above-mentioned premise, the pants body is folded back around the crotch and the opposite side edges are joined, and the absorbent core is continuous over the front-rear region of the pants body and the crotch region is narrow. And that the elastic members of the waistband and the elastic members of the pair of leg holes are formed between the topsheet and the backsheet from the one lateral edge of the topsheet and the backsheet. While extending to the other side edge and extending in series and being integrally bonded, the elastic members of the pair of leg holes are positioned between the backsheet and the core without being bonded to them. The pants and the manufacturing method thereof are characterized in that

As the constituent members of the pants, those used in a conventional disposable diaper, for example, a fibrous nonwoven fabric / porous plastic film is used as the top sheet, and a plastic film is used as the back sheet.
Waterproof fiber non-woven fabric, flaky pulp / water-absorbent paper as the absorbent core, thread-shaped or ribbon-shaped rubber as the elastic member, a relatively wide foam, and a plastic film that is elastic when heat-treated to be thermoplastic. Each can be used. A hot melt type adhesive is used as a joining means for these members, but it may be heat welded depending on the part of the pants.

(Working) The pants according to the present invention are worn in the same manner as ordinary pants.
The leg holes form gathers by the respective elastic members, and elastically press the members of the wearer to seal the members. Further, the leg ball elastic member portion located between the back seat and the core is not adhered to them and freely contracts, and the wearer always wears the portion of the pants through the core portion located at the portion. It functions to lift to the crotch side of.

(Example) Further, the pants according to the present invention will be described below based on the illustrated example.

In FIG. 1, the pants body 1 is indicated by reference numeral 1 as a whole. The pants body 1 includes a vertical rectangular water-permeable topsheet 2 which is one cover sheet, a water-impermeable backsheet 3 of the same type which is the other cover sheet, and an absorbent core 4.
And elastic members 5a, 5b for the waist band and a pair of elastic members 6a, 6b for the leg holes, which extend in series from the vicinity of one lateral edge of the topsheet 2 and the backsheet 3 to the vicinity of the other lateral edge thereof. Including and Non-woven fabric on top sheet 2,
The backsheet 3 is a plastic film, the absorbent core is a fluff pulp mat-like body and water-absorbent papers arranged on the upper and lower surfaces thereof, and the topsheet 2 and the backsheet 3 are continuously arranged from one lateral edge to the other lateral edge. Elastic member extending to
A relatively wide (10 to 30 mm) urethane home is used for each of 5a, 5b, 6a, and 6b.

At the vertically opposite ends of the upper surface of the back sheet 3, there are elastic members 5
A and 5b are bonded to each other under stretching with a hot melt adhesive. Further, the stretchable members 6a and 6b are extended with a hot-melt adhesive to form a dash-dotted line on the upper surface of the back sheet 3 in a region opposed to each other with a slight gap in the vertical direction with the horizontal virtual fold line X as a boundary. Area 8 enclosed by a box
Only glued at. On the upper surface of the backsheet 3 to which these elastic members are adhered, the horizontal virtual folding line X
And an absorptive core 4 formed in a symmetrical hourglass shape around a virtual center line Y in the vertical direction is bonded by a hot melt adhesive except for the central regions of the elastic members 6a and 6b. Furthermore, on the upper surface of the backsheet 3 to which the elastic members and the absorbent core are adhered, the topsheet 2 having the same shape and size is formed.
Are adhered by a hot-melt type adhesive, and in this case, the top sheet 2 seals between the periphery of the top sheet 2 and the back sheet 3 of the elastic members 6a, 6b, and the absorbent core 4
It is adhered so that it can be joined together.

In the pant body 1 formed by stacking in this way, the top sheet 2 and the back sheet 3 are slightly outwardly spaced from the opposite side edges of the central region of the absorbent core 4 on the virtual folding line X. A straight line 7 is cut between the open position and the opposite outer edge of the top sheet 2 and the back sheet 3.
Then, the pants body 1 is bent around the virtual fold line X so that the top sheet 2 is located inside, and the opposite side edges of the pants body 1 are joined by heat welding.

In this way, the pants according to the present invention, as shown in FIG. 2, have the front and rear waist pants 9 joined in a ring shape and have a pair of leg holes 10a, 10b opening at the lower end, and a waist band. 9 and a pair of leg holes 10a, 10b
It is formed into a complete pants type having the above-mentioned elastic members.

FIG. 3 shows another embodiment. In this embodiment, a long and wide elastic member 11 corresponding to a state in which the elastic members 6a and 6b are continuous is used. The cutting 7 of the embodiment shown in FIG. 2 is formed together with the elastic member 11, and is bonded only in the region 12 surrounded by a dashed line in a rectangular shape, and the other construction is substantially the same as that of the embodiment shown in FIG. Is.

In the embodiment shown in FIG. 1, the elastic members 5a,
Although 5b, 6a and 6b have been described as being adhered to the back sheet 3, and doing so is preferable for the function of the pants, but these may be used in the production process of the pants in some cases. It may be adhered to the top sheet 2.

In addition, the cut line 7 in the illustrated example is the virtual fold line X, that is, the center of the longitudinal length of the pants body 1 (1/2).
However, due to the reason that the region where the wearer's buttocks are located (back body) is formed wider than the region where the abdomen is located (front body), the wearer is biased to the abdomen side of the virtual fold line X. Needless to say, in this case, the elastic members 6a, 6b, 11 are also located in such a manner, and as in the illustrated example. Needless to say, the absorbent core 4 is asymmetrical about the virtual folding line X. If necessary, the absorbent core 4 may be thickened in any of the buttocks region and the abdomen region, or a part thereof.

(Effect of the invention) According to the pants according to the present invention, the fit to the wearer's body is good, and particularly, as in the pants according to the above-described known technique, between the pair of leg holes, that is, the crotch. There are no joints between components, and
Unlike the pants, the absorbent core is continuous from the front body to the back body. Therefore, even if the wearer freely moves both legs, the crotch will not be separated or damaged, the pants function will be lost, and excrement will not leak, and the wearer will not feel uncomfortable.

In particular, the leg hole expansion / contraction member portion is located on the lower surface of the core and is not adhered to any of the back sheet and the core located on the upper and lower surfaces of the portion, and can be freely contracted. Therefore, due to the contraction, the part of the pants can be always lifted to the crotch side of the wearer through the core part of the part, and moreover, the part can be fitted to the crotch without making a gather.

Furthermore, the manufacturing method is simple, such as continuously supplying each elastic member in the same direction even though the pants have such an excellent effect.

[Brief description of drawings]

The drawings show an embodiment of the pants according to the present invention.
Figure is a plan view with a part cut away, Figure 2 is an assembly drawing,
FIG. 3 is a developed plan view in which an example showing another embodiment is cut away. 1 ...... Pants body 2 ...... Top sheet 3 ...... Back sheet 4 ...... Absorbent core 5a, 5b ...... Waist band elastic member 6a, 6b, 11 ...... Leg hole elastic member 7 ...... Cutting line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-58-115106 (JP, A) JP-A-57-77304 (JP, A) JP-A-57-117602 (JP, A)

Claims (2)

[Claims] 1. A pants body having a water-permeable topsheet in contact with the wearer's skin, a water-impermeable backsheet located on the opposite side of the topsheet, and an absorbent core interposed between the two sheets. Disposable absorbent pants, comprising a waist band and elastic members respectively provided in a pair of leg holes, and having the following items. a. The pants body is folded back around the crotch and the opposite side edges are joined. b. The absorbent core is continuous over the front and rear regions of the pants body, and the crotch region is formed narrow. c. Between the elastic member of the waist band and the elastic member of the pair of leg holes, between the top sheet and the back sheet, respectively, from one side edge in the lateral direction of the top sheet and the back sheet to the other side edge thereof. The elastic members of the pair of leg holes are positioned between the backsheet and the core without being bonded to them, while being extended and extended in series and bonded integrally. 2. A method of manufacturing disposable absorbent pants, which comprises the following items. a. A waistband elastic member continuous in the lateral direction is adhered to each of the longitudinally opposite ends of one of the longitudinal rectangular covering sheets under extension. b. A central region of the elastic member is extended substantially at or near the central region between the longitudinally opposed ends of the one cover sheet and between the laterally opposed side edges thereof while extending the elastic member for leg holes continuous in that direction. Adhere except for. c. An absorbent core having a narrow central region is bonded to the one covering sheet to which the elastic members are bonded, except for the central region of the elastic member for leg holes. d. In a state of sandwiching the elastic member and the absorbent core,
Adhesion of the other covering sheet in the form of a vertical rectangle to the one covering sheet to which the respective elastic members are adhered, at a portion which becomes the peripheral edge of the pants. e. The both cover sheets, between the position slightly spaced outward from the opposite side edge of the central region of the absorbent core to the opposite outer edge of the both cover sheets, the leg hole elastic member is the both. Cut so that it is divided into two parts in the longitudinal direction of the cover sheet. f. Folding back the laminated pant body including the both cover sheets and the absorbent core so that the water-permeable sheet of the both cover sheets is located inside, and joining opposite side edges of the pant body.