JPH0856985A - Absorber product and its manufacture - Google Patents

Abstract

PURPOSE: To obtain an absorber product capable of exhibiting an excellent leakproof effect without applying an excessive oppression on a wearing person by mounting a pair of side members having stretchability and connecting both edges of a front body part and a rear body part in the parts corresponding to the leg holes of a main body so as to close part of the opening of this leg hole. CONSTITUTION: This absorber product in the form of a tapeless type diaper is so formed that one waist hole W and the two leg holes L are formed in a wearing state at a main body 1 of the product. The main body is provided with side members 10 so as to cover at least part of the lower part of the leg holes L. These side members 10 have a shape approximate to an isosceles triangle enclosed by lower edges 11 formed nearly to a V or U shape and upper edges 12 formed a straight or arc shape and are joined to the inner side surfaces of the thigh part of the main body 1 by adhesives in band-shaped bonding regions 13 formed by bending the slight inner side of the lower edges 11. Sheet materials having the good touch feeling to the skin, moderate stretchability, flexibilityand leakproofness are used as the materials of the side members 10.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to absorbent products such as diapers for children or adults, as well as methods of making such absorbent products.

[0002]

2. Description of the Related Art Absorbent products such as diapers for children or adults are generally separated on both sides of the waist and can be spread flat, and the back waist and the front waist can be detachably connected with tape when worn. It is roughly classified into a tape shape of a type and a tapeless shape of a pants in which a waist hole portion and two leg holes are formed. In any form,
A back sheet made of a liquid impermeable material and a top sheet made of a liquid permeable, non-hydrophilic material placed inside the back sheet are overlapped, and the body containing the absorber in a part between the two is stretchable. It has a structure in which a waist portion and a leg hole portion are formed.

Conventional absorbent products generally have an absorbent body sandwiched between a liquid-permeable topsheet and a liquid-impermeable backsheet, as disclosed, for example, in Japanese Patent Laid-Open No. 3-82467. It has a structure in which a top sheet and a back sheet are thermocompression bonded around them. For the purpose of preventing leakage in a worn state, elastic leg gathers are provided so as to extend along the peripheral edge of the leg hole.

[0004]

In the prior art as described above, it is not possible to meet various demands which differ depending on the application or the use form in the leakage prevention which is the most basic function of the absorbent product. Has been recognized. Taking the problem of leakage in disposable diapers as an example,
The effect of preventing leakage depends on the close contact between the leg holes of the absorbent product and the wearer's legs, and the higher the close contact, the more
It is recognized that the risk of leakage can be reduced. Therefore, the greater the tightening force of the gathers provided along the leg holes, that is, the leg gathers,
It is thought that the degree of leakage will be small, but if the tightening force is too large, the leg gathers will bite into the legs of the wearer, so not only will the wearer feel pain during long-time wearing, The risk of skin irritation such as rash is increased.

An object of the present invention is to solve the above-mentioned problems of conventional absorbent products and to exert an extremely excellent leak preventing effect without giving excessive pressure to the wearer. It is an object of the present invention to provide an absorbent product that can be manufactured, and a method for producing such an absorbent product.

[0006]

According to the present invention, there is provided a main body having a front body portion and a back body portion, and forming one waist hole and two leg holes between the front body portion and the back body portion. In the absorbent product provided, a pair of elastic side members that connect between both edge portions of the front body portion and the rear body portion at a leg hole equivalent portion of the main body is formed of an opening of the leg hole. There is provided an absorbent product characterized in that it is mounted so as to occlude at least a part thereof.

In the present invention, the role of the elastic side member is to have the functions of two gathers, that is, a raised inner leg gather and an outer leg gather, in the conventional diaper. The opening state of the leg hole provided with the side member depends on the size of the side member occupying the opening portion of the leg hole.

[0008] A preferable opening area of the leg hole is such a size that it does not hinder the insertion of the leg of the wearer and that the leg hole is closely attached to the periphery of the leg in the worn state. Since the side member of the present invention has elasticity itself, it preferably satisfies the above conditions when it has an area that occupies 2/3 or more of the opening area of the leg hole. It was found that

The side member may have a slit of a predetermined length extending from a portion forming a part of the peripheral edge of the leg hole. The presence of this slit makes it possible to secure a sufficiently large opening area while using a side member having a large area.

Thus, urine and feces are sealed by the side members located in the crotch portion, which are deep and follow the movement of the wearer, and are stably fixed to the crotch portion by the crotch portion of the main body.

Further, in the present invention, the side member may have a slit of a predetermined length extending from the upper edge portion when the area of the side member is increased. By the existence of this slit, while covering most of the leg hole,
The legs have a structure which is embedded in the side member, and as a result, it is possible to secure a sufficiently large opening area.

As a result, the entire circumference of the crotch portion is covered with the elastic side member, and the movement of the wearer sitting or running can be more freely followed. This mode is extremely suitable for a diaper of the so-called “break-on pants” type, which is particularly tapeless.

According to another preferred embodiment of the present invention, there is provided an absorbent product having a main body having a front body part and a back body part, wherein the main body has both the front body part and the back body part. A pair of side members that connect between the edge portions are attached, and the front body portion, the back body portion, and the upper edge portion of the side member are annularly connected to form a waist hole, and each of the side members is There is provided an absorbent product, which is characterized in that openings serving as leg holes are formed.

In the absorbent product of the present invention, the main body has a liquid impermeable outer sheet, a liquid permeable inner sheet, and an absorbent body provided therebetween, as in the case of a normal absorbent product. The outer body, the inner sheet, and the absorbent body, in which the front body portion that covers the front portion of the waist and the rear body portion that covers the rear portion of the waist are integrally formed of the outer sheet, the inner sheet, and the absorbent body, It is also possible to separately prepare a front body part composed of a body and a rear body part composed of an outer sheet, an inner sheet and an absorbent body, and combine both of them with a crotch part.

The absorbent body may be provided between the outer sheet and the inner sheet, but an absorbent body having one surface covered with a liquid impermeable sheet and the other surface covered with a liquid permeable sheet, It is also possible to adopt a configuration in which it is attached to the inside of the inner sheet.

Furthermore, according to the present invention, there is provided a method for producing an absorbent product having a main body having a front body portion and a back body portion, wherein a continuous strip-shaped first assembly serving as the front body portion is provided. A step of transporting in the length direction,
On the first assembly, a pair of sheet-shaped materials having a shape in which a continuous strip-shaped member is folded in two at the center in the width direction and having openings formed at predetermined intervals are provided. Continuously supplying to both edges of the assembly of
A step of stacking a continuous strip-shaped second assembly, which is the back body portion, on the first assembly and the sheet-shaped material stacked on the first assembly while transporting the continuous band-shaped second assembly; A step of joining and integrating a first assembly, the second assembly and the sheet-shaped material at a predetermined position, the integrated first assembly, the second assembly and the sheet-shaped material Is provided at a predetermined interval to obtain a single absorbent product, and a method for manufacturing the absorbent product is provided.

An embodiment of the present invention will be described below with reference to the drawings.

[0018]

1 shows an absorbent product in the form of a tapeless diaper according to a first aspect of the invention in a worn state, wherein the body 1 has one waist in a worn state. A hole W and two leg holes L are formed. Further, a side member 10 described later is provided so as to cover at least a part of the lower portion of the leg hole L, in this example, about 2/3. If necessary, waist gathers 2 and leg gathers 3 are provided along the waist hole W and the leg hole L so as to give elasticity to this portion.

As shown in the exploded view of FIG. 2, the body 1
Has a normal structure including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the two, and the main body 1 includes a front body that covers the abdomen of the wearer. It has a rectangular shape with a part 1A and a back body part 1B covering the buttocks, which is slightly narrowed at the central part on the long side, and on both sides of both ends thereof, a front body part 1A and a back body part 1B. Are connected by a connecting portion 4 to form a pants shape. The present invention can also be applied to a tape-shaped absorbent product, in which case tapes for detachably connecting to the front body portion are attached to both sides of the rear body portion of the main body 1. The structure of the main body 1 is basically the same as that used in the conventional absorbent product, and thus the detailed description thereof will be omitted. Further, the leg gathers 3 are not shown in FIG. 2 for simplification.

Further, side members 10 are attached to the central portion of the main body 1, that is, both sides of the crotch portion. The side member 10 has a lower edge 1 that is substantially V-shaped or U-shaped.
1 and a straight or arc-shaped upper edge 12 and having a shape close to an isosceles triangle, and a strip-shaped bonding region 13 formed by bending a slightly inner side of the lower edge 11 of the hot-melt adhesive. With a suitable adhesive such as
Is joined to the inner surface of the crotch part.

The material forming the side member 10 is preferably a sheet-like material having a good feel to the touch and having appropriate elasticity, flexibility and leakproofness, such as a nonwoven fabric having appropriate flexibility and elasticity, or It is desirable to utilize a composite of non-woven fabric and elastic body. An elastic film can also be used, but in the case of a film, since it generally comes into direct contact with the skin, it is often necessary to devise such a combination with a non-woven fabric.

Examples of stretchable non-woven fabrics include stretchable non-woven fabrics obtained by hydroentangling fibers such as polyester and polypropylene with a card web containing highly shrinkable conjugate fibers and then heat-shrinking the web. is there. Further, as an example of the elastic composite, a composite of a non-woven fabric and an elastic film, or a composite of a non-woven fabric and an elastic meltblown is preferably used. Further, as the side member, a material having air permeability is more preferable, and if necessary, a plurality of small vent holes may be provided in the upper portion of the side member where there is no risk of liquid seepage, in order to prevent stuffiness. Is an effective means.

Further, the side member 10 provided so as to cover a part of the leg hole L does not hinder the insertion of the leg when worn due to its elasticity, and in the worn state, together with the leg gathers 3. It adheres to the legs and serves to hold the absorbent product in a stable position.

In the example shown in FIGS. 1 and 2, the band-shaped coupling region 13 is formed by bending a part of the side member 10 inward, but it may be bent outward in some cases.

Alternatively, as shown in FIG. 3, it is also possible to use a side member 20 in which a substantially rectangular or trapezoidal sheet-shaped material is folded in a folding screen shape by three folding lines 21 which are substantially parallel to each other. The side member 20 extends over the entire length of the lower edge, and is further fixed to the main body 1 by an adhesive 22 such as a hot-melt adhesive applied so as to extend in a strip shape along side edges of the segments located at both ends. Will be joined to. The side member 20 of this form has a length in which the front body portion and the rear body portion of the main body 1 are separated from each other due to an increase in length due to bending, as compared with the flat side member 10 shown in FIGS. The degree of freedom of stretching is increased.

FIGS. 4 (A) and 4 (B) respectively show other forms of side members applicable to the present invention. In this example, the side member 30 made of a stretchable sheet material is provided with a slit 31 having an appropriate length from the central portion of the upper edge 12 toward the lower edge 11. This slit 31 is shown in FIG.
In the example of (A), it is a straight line, and in the example of FIG. 4 (B), the tip is branched in two directions. In either case, slit 3
1 allows the upper portion of the side member 30 to open greatly when the legs are inserted into the leg hole L with the side member 30 attached to the main body 1, so that the side member 30 has the leg hole L Even if it has a size that covers almost all of the above, it does not hinder wearing, and further, stable contact is improved by contacting the legs with most of the length of the leg hole L. Furthermore, FIGS. 5 and 6 show a second aspect of the light. In this case, the side member 40 provided on the main body 1
Is a member located at the center of the crotch portion of the main body 1 and is made of an elongated strip-shaped elastic sheet material having a width that is widest and narrower on the waist hole side.
As a means for changing the width of the side member 40, in this example, a means of cutting the side member 40 over an appropriate length at both end sides is adopted. This side member 40 is
In the example of FIG. 5 and FIG. 6, the main body 1 is joined to the main body 1 at the edge portion located outside when viewed from the center in the width direction, but as shown in FIG. 7, the main body 1 is joined at the inner edge portion. May be joined to.

In the case of the side member 40 having this structure, as shown in FIG. 5, when the leg hole is expanded in the worn state, the edge portion opposite to the edge portion adhered to the main body 1 is Rise and form a cuff that covers at least a portion of the leg hole, as in the previous example.

Alternatively, as shown in FIG. 7, a sheet-like material in the form of a double-folded strip may be attached to the main body 1 in such a direction that the open side thereof is located inside to form the side member 50. In this case, the portion of the side member 50 that rises so as to cover a part of the leg hole in the worn state is outside the joining line joined to the main body 1.

In the example of FIG. 7, the main body 1 has a front body portion 1A and a rear body portion 1B which are separate members, and are connected to each other at a joint portion 5 at each crotch end. have. Then, a side member 50 is attached to the main body 1 such that a notch 51 similar to that shown in FIGS. 5 and 6 is arranged outward.
Also in this case, the side member 50 stands up in the worn state, and exhibits the adhesion to the body and the leakage prevention effect.

The main body 1 of the structure shown in FIG. 7 includes an assembly for a front body portion in which absorbent bodies are arranged at a predetermined interval between continuous sheet-like materials for a back sheet and a top sheet, and a rear body portion similar to the assembly. The sheet-like material for the side member is continuously fed to the three parts at predetermined positions, and then the rear body part 1
This is suitable for continuous production in the production process, in which A and the rear body portion 1B are joined by the joining portion 5.

FIG. 8 shows a third aspect of the present invention. In this example, the front body portion 1A and the back body portion 1B of the main body 1 are
A pair of side members 60 are attached so as to connect both edge portions of the front body portion 1A, the rear body portion 1B, and the upper edge portions of the side members 60 to form a waist hole W. are doing. Further, each of the side members 60 is formed with an opening 61 in the form of a substantially isosceles triangular hole which serves as a leg hole.

In this structure, the side member 60 has a function as a cuff that closely adheres to the circumference of the wearer's leg to hold the absorbent product at a predetermined position and prevents leakage, and also has a front body part and a rear part. It functions as a side band that connects the body part to the side of the body part, which provides a better fit.

An opening 61 provided for forming a leg hole in the side member 60 is a vertically long elliptical hole shown in FIG. 8, and a triangular opening 61 shown in FIG. As shown in A), a slit 62 having an appropriate length extending upward from its apex may be formed, if necessary. The slit 62 acts as a tearing end when tearing the side member 60 from the opening 61 to its upper edge when removing the absorbent product after use. If the material forming the side member 60 has a high tear strength, a perforation having a length reaching the upper edge of the side member 60 from the upper end of the slit 62 or instead of the slit 61 is provided. Good.

Further, by appropriately selecting the height of the triangular opening 61, that is, the angle formed by the bottom side and the side in contact with it, the sum of the lengths of the three sides of this triangle, that is, the size of the opening that becomes a leg hole. It is possible to select the size in a wide range.

Alternatively, as shown in FIG. 9B, a horizontally elongated oval or elliptical hole 61 may be provided.

Further, as shown in FIGS. 10A, 10B, and 10C, the opening 61 may be a slit having one character, a cross shape, or a Y shape.

When the opening 61 is a slit,
As shown in FIGS. 11 (A) and 11 (B), one end of a slit-shaped opening 61 having a substantially straight Y-shape or a branched front end is communicated to the outside at the upper edge of the side member 60 on the waist hole side, It is also possible to adopt a configuration in which this portion is closed with a fastening member 63 such as a tape or a Velcro zipper.

Further, the present invention provides a method of manufacturing an absorbent product having a structure as shown in FIG. FIG. 12 shows an essential part of a process of manufacturing an absorbent product according to the method of the present invention.

In FIG. 12, reference numeral A denotes a belt-shaped first assembly which is a front body portion, and B denotes a belt-shaped second assembly which is a rear body portion. The first assembly A is configured by stacking continuous strip-shaped top sheets A1 and back sheets A2 on each other, and sandwiching an absorber A3 at appropriate intervals therebetween.
It is conveyed at a predetermined speed in the arrow direction along the length direction. The second assembly B is also configured by stacking continuous strip-shaped top sheets B1 and back sheets B2 on top of each other, and sandwiching an absorbent body B3 between them at appropriate intervals, along the length direction thereof in the arrow direction. It is conveyed in synchronization with the assembly A of item 1.

The first assembly A and the second assembly B are provided by a suitable means such as a guide roller.
The absorbers A3 and B3 are superposed on each other at a proper point P1 of the transport system path at such a timing that they face each other.

On the other hand, at a point P2 before the point P1, a pair of sheet-like members C serving as side members are continuously supplied onto the top sheet A1 of the first assembly A. Each sheet-shaped member C has a shape in which a continuous strip-shaped member is folded in two at the center in the width direction, and in this example, the opening C1 has a predetermined interval from the bent edge toward the opposite edge. Is formed by. This sheet-shaped member C is
It is supplied to both ends of the first assembly A with their folding edges facing each other. It should be noted that these members are coated with a hot-melt type adhesive agent extruded from a nozzle (not shown) at desired positions to be bonded to other members.

When the first assembly A and the sheet-like member C placed thereon reach the point P1, the second assembly B is superposed on it and the hot-melt type is applied to each member. After passing through a thermocompression bonding mechanism (not shown) for bonding with an adhesive, in the final cutting step,
Excessive portion D is cut off and separated into individual absorber products.

The above-described manufacturing method of the present invention is a manufacturing mode in which each material is conveyed in parallel with the side edge of the product, which is generally called vertical manufacturing, and therefore can be easily executed at high speed. Therefore, it is possible to improve the manufacturing speed and reduce the cost.

[0044]

As described above, in the absorbent product of the present invention, the side member arranged so as to close at least a part of the leg hole is attached to the main body, and the side member is worn in the leg hole. It is possible to maintain good adhesion to the person's body, improve the wearing feeling, and improve the leakage prevention effect.

Further, such an absorbent product can be mass-produced efficiently and on an industrial scale by the method of the present invention, and quality stabilization and cost reduction can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view showing an absorbent product according to a first aspect of the present invention in a worn state.

FIG. 2 is a developed perspective view of the absorbent product shown in FIG.

FIG. 3 is a perspective view showing a side member of another form applicable to the absorbent product of the present invention.

FIG. 4A and FIG. 4B are plan views showing side members of still another form applicable to the absorbent product of the present invention.

FIG. 5 is a perspective view showing an absorbent product according to a second aspect of the present invention.

FIG. 6 is an explanatory view showing the form of a side member used in the absorbent product of FIG.

FIG. 7 is an explanatory view showing a form of a side member used in another absorbent product similar to the absorbent product in FIG. 5.

FIG. 8 is a perspective view showing the absorbent product according to the third aspect of the present invention in a worn state.

9A and 9B are plan views showing other side members applicable to the absorbent product of FIG. 8.

10 (A), (B) and (C) are plan views showing still another side member applicable to the absorbent product of FIG. 8.

11 (A) and (B) are plan views showing still another side member applicable to the absorbent product of FIG. 8.

FIG. 12 is an explanatory view showing a process of manufacturing the absorbent product shown in FIG. 7.

[Explanation of symbols]

 1 Main Body 2 West Gather 3 Leg Gather W West Hole L Leg Hole 10 Side Member 11 Lower Edge 12 Upper Edge 13 Bonding Area 20 Side Member 21 Bending Line 22 Adhesive 30 Side Member 31 Slit 40 Side Member 41 Opening 43 Fastening Member 50 Side Member 51 Notch 60 Side member 61 Notch 62 Slit 63 Fastening member A First assembly A1 Topsheet A2 Backsheet A3 Absorber B1 Topsheet B2 Backsheet B3 Absorber C Sheet-like member C1 Opening D Excess part P1, P2 point

Claims (18)

[Claims] 1. An absorbent product comprising a front body part and a back body part, and a main body forming one waist hole and two leg holes between the front body part and the back body part, said absorbent product comprising: A pair of elastic side members that connect between the both edges of the front body portion and the rear body portion are attached to a portion corresponding to a leg hole of the main body so as to block at least a part of the opening of the leg hole. Absorber product characterized by being 2. The absorbent product according to claim 1, wherein each of the side members has an area that covers 2/3 or more of an opening area of the leg hole. 3. The absorbent product according to claim 2, wherein the side member has a slit having a predetermined length and extending from an edge portion forming a part of a peripheral edge of the leg hole. 4. The absorbent product according to claim 3, wherein a tip portion of the slit is branched into a plurality of portions. 5. The absorbent body according to claim 1, wherein the side member has a width that is widest at a portion of the main body located at the center of the crotch portion and narrower than the waist hole side. Product. 6. An absorbent product having a main body having a front body portion and a back body portion, wherein the body is connected between both edge portions of the front body portion and the back body portion.
A pair of side members are attached, and the front body portion, the back body portion, and the upper edge portion of the side member are connected in a ring shape to form a waist hole, and an opening serving as a leg hole is formed in each of the side members. Absorber products characterized by being 7. The absorbent product according to claim 6, wherein the opening has a vertically elongated elliptical shape. 8. The absorbent product according to claim 6, wherein the opening has an oblong oval shape. 9. The absorbent product according to claim 6, wherein the opening is an isosceles triangle whose base is laterally oriented. 10. The absorbent product according to claim 9, wherein the opening is an isosceles triangle whose base is lateral and has a slit extending upward from the apex thereof. 11. The absorbent product according to claim 6, wherein the slit has a linear shape extending in the lateral direction. 12. The absorbent product according to claim 6, wherein the slit has a cross shape. 13. The absorbent product according to claim 6, wherein the slit is Y-shaped. 14. The absorbent body according to any one of claims 6 to 13, wherein the side member has no joint portion other than joint portions with both side edge portions of the front body portion and the rear body portion. Product. 15. The slit reaches the upper edge of the side member and is closed by a fastening member attached to the side member at an end on the upper edge side.
14. The absorbent product according to any one of 14 above. 16. The body according to any one of claims 1 to 15, wherein the main body has a structure in which a front body portion and a back body portion, which are separately configured, are connected to each other by respective crotch portions. Absorber products. 17. A method for manufacturing an absorbent product having a main body having a front body portion and a back body portion, comprising a continuous strip-shaped first assembly, which is the front body portion, in a longitudinal direction thereof. A step of conveying, and a pair of sheet-like materials having a shape in which a continuous strip-shaped member is folded in two at the center in the width direction on the first assembly, and having openings formed at predetermined intervals Is continuously supplied to both edges of the first assembly, and a continuous belt-like portion which becomes the rear body portion is formed on the first assembly and the sheet-shaped material laminated on the first assembly. A step of stacking the second assembly while conveying the second assembly in the length direction thereof, and a step of joining and integrating the first assembly, the second assembly and the sheet-shaped material at a predetermined position, A step of separating the integrated first assembly, the second assembly and the sheet-shaped material at a predetermined interval to obtain a single absorbent product. Manufacturing method. 18. The manufacturing method according to claim 17, wherein the joining is performed with a hot-melt type adhesive applied at a predetermined position.