JP3434797B2 - Absorbent product and method of manufacturing absorbent product - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent product for liquid such as urine applied to disposable diapers, sanitary napkins, incontinence pads and the like, and a method for producing the absorbent product.

[0002]

2. Description of the Related Art As such an absorbent product, for example, a conventional disposable diaper has a structure as described below. In general, such "Oshime" has a liquid-impermeable sheet material applied to the outer surface when worn by the user, and an absorbent material for absorbing liquid such as urine is provided inside the sheet material. A sheet material that is permeable to the liquid is disposed in the portion that is disposed and that is in contact with the user's skin inside thereof.

[0003] Generally, such an "oscillating" is
A sealing means is provided to surround the user's crotch when worn by the user. By this sealing means,
Liquid such as urine is prevented from flowing out of the "Oshime" and soiling underwear. FIG. 12 shows a disposable diaper as an example of a conventional absorbent product. The diaper 1000 has a long shape in the front-rear direction so that it can cover excrements such as urine and feces when worn by the user. A liquid-impermeable backsheet 1001 is used at a location that is an outer surface of the rivet 1000. Inside the back sheet 1001, an absorber 1002 and a tissue 100 for absorbing a liquid such as urine are provided.
3 are stacked and arranged. A surface material 1004 is arranged further inside the absorber 1002. The surface material 1004 is made of a material that allows liquid to pass through. The surface material 1004 and the back sheet 1001 are arranged so as to overlap each other, and two three-dimensional gather portions 1005 and 1005 are provided inside the surface material 1004. A crotch gather portion 1006 is provided outside the three-dimensional gather portion 1005. This three-dimensional gather portion 1005 is a diaper 100.
When 0 is worn by the user, the user's crotch is surrounded so that liquid such as urine does not flow to the outside of the diaper 1000 to prevent the underwear from being soiled.

FIG. 13 shows an example of a laminated structure of portions 1010 at both ends of the diaper 1000 of FIG. The backsheet 1001 has a hot melt 10 against the surface material 1004.
Bonded with 12. The surface material 1004 has a center surface material 1014 and two side surface materials 1016, and the side surface materials 1016 and 1016 are arranged on both sides along the longitudinal direction of the center surface material 1014. An inner side 1018 of the side surface material 1016 is provided so as to surround the elastic body 1020 to form the three-dimensional gather portion 1005. The surface 1014A of the center surface material 1014 is bonded to the folded-back portion 1026 of the side surface material 1016 by using hot melt 1028. A heat seal portion 1030 is formed on the side surface material 1016.

An oscillating machine 1000 having a structure as shown in FIG.
In this case, since the folded-back portion 1026 of the side surface material 1016 is folded back to the surface 1014A side of the center surface material 1014, it is called an inward folding type crease or the like.

FIG. 14 shows another example of the laminated structure of the portions 1010 at both ends of the rim 1000 of FIG. In this example, since the folded-back portion 1040 of the side surface material 1016 is bent in the outer J direction, it is called an outer folding type crease. The elastic body 1020 is contained in the folded portion 1040. Other components are shown in Figure 1.
It is the same as that of the internal folding type 3 of 1000.

[0007]

However, the conventional nipple 1000 shown in FIG. 13 has the following problems.
End portion 1044 of the folded back portion of the side surface material 1016
Has a portion 1050 separated from the surface 1014A of the center surface material 1014.

Also in the conventional rivet 1000 shown in FIG. 14, the inner end portion 1048 of the side surface material 1016 is also the same.
Has a portion 1050 separated from the surface 1014A of the center surface material 1014. As described above, since there is a separated portion 1050 in the diaper 1000 in FIGS. 13 and 14, the end portions 1044 and 1048 in the longitudinal direction L of the three-dimensional gather portion 1005 are the surface material 1.
Since it is separated from the surface 1014A of 014 and is not adhered, the function of maintaining the standing state in the V direction of the three-dimensional gather portion 1005 is deteriorated and the end portion 10
There is a possibility that urine and the like may leak to the outside from the separated portion 1050 of 44 and 1048. Therefore, there is a problem that urine or the like leaks to the outside along the lateral direction T and the longitudinal direction L. Further, since the end portions 1044 and 1048 are not bonded to the center surface material 1014, the end portions 1044 and 1048 stand up in the V direction, and the end portions 1044 and 1048 come into contact with the user's body. Therefore, there is a problem in that the feeling during use becomes poor and the wearing feeling deteriorates. Then, this invention solves the said subject, can prevent the leakage of urine etc. completely, and aims at providing the absorptive product which can improve the wearing feeling at the time of use, and the manufacturing method of an absorptive product. .

[0009]

According to a first aspect of the present invention, there is provided a back sheet for preventing liquid permeation, a liquid-permeable center surface material arranged on the side in contact with the body, the back sheet, and the back sheet. An absorber arranged between the center surface materials to absorb and retain the liquid that has permeated the center surface material, and a liquid which is arranged at both ends of the center surface material along the longitudinal direction of the center surface material. It is formed to be elastic in the longitudinal direction by arranging an elastic body at least in the central portion in the longitudinal direction of the side surface material for preventing liquid permeation and the side surface material or the center surface material for preventing liquid leakage. A three-dimensional gather portion, and an end portion in the longitudinal direction of the three-dimensional gather portion is formed of the center surface material by an adhesive that attaches the back sheet and the center surface material. Serial resorbable product characterized in that affixed to the surface of the body contact.

In the first aspect, the back sheet prevents the permeation of the liquid. The center surface material is a liquid permeable material that is arranged on the surface side that contacts the body. The absorber is arranged between the back sheet and the center surface material and absorbs and holds the liquid that has permeated the center surface material. The side surface material prevents the permeation of liquids arranged along the longitudinal direction of the center surface material at both ends of the center surface material. The three-dimensional gather portion is formed so as to be expandable and contractible in the longitudinal direction by disposing an elastic body in at least the central portion in the longitudinal direction of the side surface material or the center surface material in order to prevent liquid leakage. The longitudinal end portion of the three-dimensional gather portion is attached to the surface of the center surface material that comes into contact with the body with an adhesive that attaches the back sheet and the center surface material. As a result, the longitudinal end of the three-dimensional gather is integrally attached to the surface of the center surface material that contacts the body, preventing urine from leaking along the longitudinal direction of the absorbent product. can do. Moreover, by adhering and fixing the longitudinal end portions of the three-dimensional gather portion, the function of maintaining the standing state of the three-dimensional gather portion can be improved, and urine and the like are less likely to leak in the lateral direction. Since the longitudinal end of the three-dimensional gather is attached to the surface of the center surface material that contacts the body, the longitudinal end of the three-dimensional gather does not rise and It is possible to enhance the feeling of wearing without the ends touching the body.

According to a second aspect of the present invention, in the absorbent product according to the first aspect, the adhesive is a hot-melt adhesive arranged between the back sheet and the center surface material, and the hot melt adhesive is applied by pressing. The adhesive exuding through the center surface material adheres the longitudinal end of the three-dimensional gather portion to the surface of the center surface material that contacts the body. In the second aspect, the adhesive is a hot melt adhesive arranged between the back sheet and the center surface material. The adhesive that oozes out through the center surface material by applying pressure attaches the longitudinal end of the three-dimensional gather portion to the surface of the center surface material that contacts the body. By doing so, it is possible to reliably bond the longitudinal end portion of the three-dimensional gather portion to the body contacting surface of the center surface material using the hot melt adhesive by simply applying pressure.

According to a third aspect of the present invention, there is provided a back sheet for preventing liquid permeation, a liquid-permeable center surface material arranged on the side in contact with the body, and between the back sheet and the center surface material. An absorber that is arranged to absorb and retain the liquid that has permeated the center surface material, and a side that is arranged at both ends of the center surface material along the longitudinal direction of the center surface material to prevent liquid permeation. A surface gathering member, and a three-dimensional gather portion formed to extend and contract in the longitudinal direction by arranging an elastic body at least in the central portion in the longitudinal direction of the side surface member to prevent liquid from leaking. The gather portion is folded back outward in the lateral direction and adhered to the surface of the side surface material that contacts the body, and is formed by folding back the three-dimensional gather portion outward in the lateral direction. The inner end in the longitudinal direction of the folded portion of the three-dimensional gather portion is attached to the surface of the center surface material that comes into contact with the body with an adhesive that attaches the back sheet and the center surface material. It is an absorbent product characterized by

In the third aspect, the back sheet prevents the permeation of the liquid. The center surface material is a liquid-permeable material that is arranged on the surface side that contacts the body. The absorber is arranged between the back sheet and the center surface material and absorbs and holds the liquid that has permeated the center surface material. The side surface material is
Both ends of the center surface material are arranged along the longitudinal direction of the center surface material to prevent liquid permeation. The three-dimensional gather portion is formed so as to be expandable and contractable in the longitudinal direction by disposing an elastic body at least in the longitudinal central portion of the side surface material in order to prevent liquid leakage. The three-dimensional gather portion is folded back outward in the lateral direction and adhered to the surface of the side surface material that contacts the body. The inner end in the longitudinal direction of the folded back portion of the three-dimensional gather portion formed by folding back the three-dimensional gather portion to the outside in the lateral direction is the center surface by the adhesive attached to the back sheet and the center surface material. It is attached to the surface of the material that contacts the body. As a result, the inner end of the three-dimensional gather in the longitudinal direction is integrally attached to the surface of the center surface material that comes into contact with the body, so that urine or the like does not leak along the longitudinal direction of the absorbent product. Can be prevented.
Moreover, by attaching and fixing the inner end portion of the three-dimensional gather portion in the longitudinal direction, the function of maintaining the standing state of the three-dimensional gather portion can be improved, and urine and the like are less likely to leak in the lateral direction. Since the longitudinal end of the three-dimensional gather is attached to the surface of the center surface material that contacts the body, the longitudinal end of the three-dimensional gather does not rise and It is possible to enhance the feeling of wearing without the ends touching the body.

According to a fourth aspect of the present invention, in the absorbent product according to the third aspect, the adhesive is a hot melt adhesive disposed between the back sheet and the center surface material, and the hot melt adhesive is applied by pressurization. The adhesive that has exuded through the center surface material adheres the inner end in the longitudinal direction of the folded portion of the three-dimensional gather portion to the surface of the center surface material that contacts the body. In claim 4, the adhesive is a hot melt adhesive disposed between the back sheet and the center surface material. The adhesive that oozes out through the center surface material by pressure is applied to the end of the folded portion of the three-dimensional gather portion on the inner side in the longitudinal direction on the surface of the center surface material that contacts the body. By doing so, the inner end in the longitudinal direction of the three-dimensional gather portion can be reliably bonded to the surface of the center surface material that comes into contact with the body using the hot melt adhesive by simply applying pressure. .

According to a fifth aspect of the present invention, there is provided a method for manufacturing an absorbent product in which a liquid is absorbed and held in an absorbent body, and a back sheet for preventing the permeation of the liquid and a liquid arranged on the side in contact with the body. A transparent center surface material is adhered with an adhesive, and in order to prevent liquid leakage, an elastic body is arranged at least in the central portion of the side surface material or center surface material in the longitudinal direction so that it can be expanded and contracted in the longitudinal direction. An arrangement step of arranging the formed three-dimensional gather portion so as to overlap the center surface material, and applying pressure to a longitudinal end portion of the folded portion of the three-dimensional gather portion formed by folding the three-dimensional gather portion. , The end of the three-dimensional gather portion in the longitudinal direction is brought into contact with the body of the center surface material with an adhesive that attaches the back sheet and the center surface material. And pasting step pasted to the surface, a method of manufacturing an absorbent product characterized in that it comprises a. In the arranging step, in the arranging step, the back sheet and the center surface material are adhered with an adhesive, and an elastic body is arranged at least in a central portion in the longitudinal direction of the side surface material and the center surface material in order to prevent liquid leakage. By doing so, the three-dimensional gather portion that is formed to be elastic in the longitudinal direction is arranged so as to overlap the center surface material. In the attaching step, pressure is applied to the longitudinal end portion of the folded portion of the three-dimensional gather portion formed by folding back the three-dimensional gather portion, so that the longitudinal end portion of the three-dimensional gather portion is brought into contact with the backsheet and the center surface material. Attach it to the surface of the center surface material that comes into contact with the body with the adhesive. As a result, the longitudinal end portion of the three-dimensional gather portion is easily attached integrally to the surface of the center surface material that comes into contact with the body. Can be prevented from leaking. Moreover, by adhering and fixing the longitudinal end portions of the three-dimensional gather portion, the function of maintaining the standing state of the three-dimensional gather portion can be improved, and urine and the like are less likely to leak in the lateral direction. Since the longitudinal end of the three-dimensional gather is attached to the surface of the center surface material that contacts the body, the longitudinal end of the three-dimensional gather does not rise and It is possible to enhance the feeling of wearing without the ends touching the body.

According to a sixth aspect of the present invention, in the method for manufacturing an absorbent product according to the fifth aspect, the adhesive is a hot melt adhesive arranged between the back sheet and the center surface material. The adhesive exuded through the center surface material by pressure adheres the longitudinal end of the three-dimensional gather portion to the surface of the center surface material that contacts the body. In the sixth aspect, the adhesive is a hot melt adhesive arranged between the back sheet and the center surface material. The adhesive that oozes out through the center surface material by applying pressure attaches the longitudinal end of the three-dimensional gather portion to the surface of the center surface material that contacts the body.
By doing so, it is possible to securely bond the longitudinal end of the three-dimensional gather portion to the surface of the center surface material that comes into contact with the body by an easy manufacturing method using a hot melt adhesive by simply applying pressure. can do.

A seventh aspect of the present invention is a method of manufacturing an absorbent product in which a liquid is absorbed and held in an absorbent body, and a back sheet for preventing the permeation of the liquid and a liquid arranged on the side in contact with the body. A three-dimensional gather formed by adhering a permeable center surface material with an adhesive and arranging an elastic body at least in the longitudinal center of the side surface material so as to prevent liquid leakage so that it can be expanded and contracted in the longitudinal direction. An arrangement step of arranging a portion so as to overlap the center surface material, and a pressure is applied to an inner end in the longitudinal direction of the folded portion of the three-dimensional gather portion formed by folding the three-dimensional gather portion outward in the lateral direction. By applying an adhesive agent that attaches the backsheet and the center surface material to the inner end in the longitudinal direction of the folded-back portion of the three-dimensional gather portion. And pasting step pasted to a surface in contact with the body of facing material, a method of manufacturing an absorbent product characterized in that it comprises a.

In the arranging step, in the arranging step, the back sheet and the center surface material are adhered by an adhesive, and the elastic body is arranged at least in the central portion in the longitudinal direction of the side surface material in order to prevent liquid leakage. The three-dimensional gather portion, which is formed so as to be stretchable in the longitudinal direction, is arranged so as to overlap the center surface material. In the attaching step, pressure is applied to the inner end in the longitudinal direction of the folded portion of the three-dimensional gather portion formed by further folding the three-dimensional gather portion outward in the lateral direction. The inner end in the longitudinal direction is attached to the surface of the center surface material that comes into contact with the body with an adhesive that attaches the back sheet and the center surface material. As a result, the longitudinal end portion of the three-dimensional gather portion is easily attached integrally to the surface of the center surface material that comes into contact with the body.
It is easy to manufacture and can prevent urine and the like from leaking along the longitudinal direction of the absorbent product. Moreover, by attaching and fixing the inner end portion of the three-dimensional gather portion in the longitudinal direction, the function of maintaining the standing state of the three-dimensional gather portion can be improved, and urine and the like are less likely to leak in the lateral direction. Since the longitudinal end of the three-dimensional gather is attached to the surface of the center surface material that contacts the body, the longitudinal end of the three-dimensional gather does not rise and It is possible to enhance the feeling of wearing without the ends touching the body.

According to an eighth aspect of the present invention, in the method for manufacturing an absorbent product according to the seventh aspect, the adhesive is a hot melt adhesive arranged between the back sheet and the center surface material, and The adhesive that has exuded through the center surface material by pressure adheres the inner end in the longitudinal direction of the folded portion of the three-dimensional gather portion to the surface of the center surface material that contacts the body. In claim 8,
The adhesive is a hot melt adhesive placed between the backsheet and the center facing. The adhesive that oozes out through the center surface material by pressure is applied to the end of the folded portion of the three-dimensional gather portion on the inner side in the longitudinal direction on the surface of the center surface material that contacts the body. By doing so, it is possible to securely bond the longitudinal end of the three-dimensional gather portion to the surface of the center surface material that comes into contact with the body by an easy manufacturing method using a hot melt adhesive by simply applying pressure. can do.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiment described below is a preferred specific example of the present invention,
Although various technically preferable limitations are given, the scope of the present invention is not limited to these forms unless otherwise specified in the description below.

FIG. 1 shows an example of the shape of an absorbent product of the present invention when an oscillating piece is used. FIG. 2 is a plan view showing the inside of the diaper 1. In FIG. 1 and FIG. 2, the diaper 1 has a back sheet 2, a tissue 3, an absorbent body 4, a surface material 5, left and right three-dimensional gather portions 6, and left and right crotch gather portions 7. The back sheet 2 is also called an outer sheet material or the like, and is made of a material that prevents liquid from permeating. As a material of the back sheet 2, for example, a thin plastic film, specifically, a polyethylene film or polyethylene laminated paper can be used. The back sheet 2 is impermeable to liquid, but is preferably made of a material that allows water vapor to pass therethrough to prevent stuffiness and has some flexibility. As a result, the contents inside the diaper 1 (solid substances such as filth and urine) are prevented from leaking to the outside.

The tissue 3 and the absorbent body 4 are arranged and housed between the back sheet 2 and the surface material 5, and are portions for absorbing and holding liquid and the like. The tissue 3 is made of a soft material that absorbs liquids, such as pulp (virgin pulp, recycled pulp), rayon, cotton, kenaf, bagasse, silk, hydrophilic fibers (polyolefin, polyester, acrylic). Alternatively, a composite sheet may be used. The absorber 4 plays a role of absorbing and holding the liquid component that has permeated the center surface material 8 of the surface material 5. Therefore, any material having excellent liquid absorbency can be used. Examples of the material of such an absorber 4 include mixing a polymer which is an absorbent with pulp or sprinkling the polymer on pulp. Pulp absorbers or polymers that form are preferred. Here, the pulp is an aggregate of extracted cellulose fibers obtained by mechanically or chemically treating wood, for example, and a linear or sheet-like pulp is used.

The surface material 5 has a center surface material 8 and two side surface materials 9 and 10. Center surface material 8
Is a portion fixed to the back sheet 2 along the longitudinal direction L with an adhesive, and since the center surface material 8 directly touches the user's skin, the touch is good without damaging the skin more than necessary. Considering the points, a material suitable for this is selected. The center surface material 8 is also called an inner sheet or a top sheet, and as a fiber made of a material suitable for allowing a liquid to permeate therethrough and particularly a liquid component permeate quickly,
For example, various natural fibers, synthetic fibers, or a combination thereof can be selected. For example, as the synthetic fiber, for example, a fiber formed of polyester or polypropylene fiber as a material to improve liquid permeability is preferable.

The side surface materials 9 and 10 are arranged on both sides along the longitudinal direction L of the surface material 8. The center surface material 8 is permeable to liquid, whereas the side surface materials 9 and 10 are made of a material that prevents liquid from permeating. When the center surface material 8 is made of non-woven fabric,
Wet non-woven fabric (paper, tissue, Hydrospun (Dexter), chemical bond (or resin bond), thermal bond (emboss, anvil, air through), airlaid, spunlace, spunbond, meltblown, needle punch, stitch bond, and span. SM non-woven fabric made by combining bond and melt blown non-woven fabric (spunbond and melt blown laminate), SM
S non-woven fabric (a laminated body of spunbond, meltblown and spunbond) can be used. Among them, as the material of the center surface material 8, thermal bond, spun bond, and spun lace are particularly preferable. On the other hand, as the material of the side surface materials 9 and 10, for example, a combination of a polyolefin-based nonwoven fabric or a polyester-based nonwoven fabric and a thin plastic film, a combination of a polyester-based nonwoven fabric and a polyethylene film, an SM nonwoven fabric, an SMS nonwoven fabric, etc. Can be adopted.

The left and right three-dimensional gather portions 6, 6 are formed by arranging elastic bodies (also called gathers) 11 at least in the longitudinal central portions of the side surface materials 9, 10, respectively. In the illustrated example, the three-dimensional gather portion 6 is formed by disposing an elastic body at least in the central portion of the side surface material 10 in the longitudinal direction L. However, in another embodiment, the three-dimensional gather portion can be formed by disposing the elastic body at least in the central portion of the center surface material 8 in the longitudinal direction L. In order to form the three-dimensional gathered portion 6, the linear elastic body 11 is provided with the side surface material 9 or the side surface material 1.
It is accommodated along the longitudinal direction L in at least the central portion of 0. Due to the elastic contraction ability of this elastic body 11,
As shown in FIG. 1, the three-dimensional gathered portion 6 is formed at least in the central portion of the side surface materials 9, 10. By forming the three-dimensional gathered portion 6, the excrement or liquid component of the user is tightly adhered to the user's body and prevented so as not to leak outside along the lateral direction T of the diaper 1.
The crotch gather portion 7 cooperates with the three-dimensional gather portion 6 to pull elastically both ends in the lateral direction which hit the crotch of the diaper 1 to enhance the fit to the crotch and leak from the crotch portion (in the lateral direction). Prevent things.

An adhesive portion 12 for preventing displacement is formed on the outer surface 2A of the back sheet 2 shown in FIG. The adhesive portion 12 for preventing the shift is covered with a peeling paper 13. When the diaper 1 is used, the peeling paper 13 is peeled off to expose the displacement prevention adhesive portion 12, so that the displacement prevention adhesive portion 12 can be removably adhered to the inner surface of underwear or the like. Thus, the diaper 1 can be fixed to the underwear such as pants so as not to shift.

FIG. 3 is an enlarged view showing an example of the laminated structure of the portions P at both ends of the oscillating 1 shown in FIGS. Figure 4
FIG. 4 is an exploded perspective view of a laminated structure element in a portion P of the oscillating 1 in FIG. This oscillating 1 is an example of a so-called inward folding type. 3 and 4, the back sheet 2 and
The tissue 3 and the absorbent body 4 are sandwiched between the center surface material 8 so as to be housed. The center surface material 8 and the ends of the back sheet 2 are bonded together by using a hot melt (an example of an adhesive) 20 for end sealing for sealing. The center surface material 8 and the two side surface materials 9 and 10 are bonded by using hot melt 22.

The side surface material 9 and the side surface material 10 each accommodate an elastic body 11 for forming the three-dimensional gather portion 6. This elastic body 11 is composed of the side surface materials 9 and 1
It is accommodated by bending the inner end 24 of 0 into a bag shape. The inner end 24 is integrally fixed to the side surface materials 9 and 10 by using a heat seal portion 25. The elastic body 11 is made of, for example, a linear elastic material, specifically rubber or the like, and the bag-shaped portion 25 of the side surface materials 9 and 10 is formed.
It is housed in A. Further, although the elastic body 11 is provided up to the longitudinal end portion of the diaper 1 here, it may be provided only in the central portion. The contact portions of other members such as the back sheet and the side surface material are basically adhered by hot melt, but the illustration is omitted for simplification of the drawing. For example, the portion of the adhesive portion 27 shown in FIG. 3 is adhered by hot melt.

Here, an example of a manufacturing apparatus for the diaper 1 shown in FIG. 1 will be briefly described with reference to FIG. Figure 1
The absorbent product manufacturing apparatus 200 of No. 1 roughly includes an absorbent body manufacturing step 201, a surface material manufacturing step 202, a peeling paper attaching step 203, a three-dimensional gather portion forming step 204, left and right end folding steps 205, a pressing step 206, and cutting. Folding step 207
And so on. In the absorber manufacturing process 201, the drum 2
When the pulp is supplied from 10, the pulp is crushed and the polymer is supplied, so that the absorber 4 is formed. The band-shaped tissue 3 is supplied from the drum 211 and integrated with the absorber 4, and the absorber 4 is contained by the tissue 3. Then, the tissue 3 is cut into a predetermined length by the mat cutter 212.

In the surface material manufacturing process 202, the drum 214 is used.
The center surface material 8 is supplied from the drum 2
Side surface materials 9 and 10 are supplied from 15. After the three-dimensional gather portion 6 is formed on the side surface materials 9 and 10, the heat seal portion 25 is applied. As a result, the side surface materials 9 and 10 having the heat seal portion 25 are formed, and the elastic material 11 such as rubber is accommodated in the side surface materials 9 and 10. The center surface material 8 and the side surface materials 9 and 10 are integrated with the absorber portion by the heat embossing portion 217. The backsheet 2 is supplied from the drum 218, and the crotch gather portion 7 is applied. Then, in the end side seal 219, the center surface material 8, the side surface materials 9, 10 and the back sheet 2 are integrated. The backing sheet 2 has the peeling paper 13 attached in advance in the peeling paper attaching step 203. In this way, the center surface material 8, the side surface materials 9 and 10 and the back sheet 2 which are integrated together are bent to their right and left ends in the lateral direction, and are formed into a substantially C-shape in cross section. After applying pressure by passing through the press belt 220 in the pressing step 206, the product cutter 221 cuts the product to a predetermined length. After that, the diaper 1 is folded in three in the longitudinal direction. In this way, the three-folded diaper 1 can be obtained.

Next, referring to FIGS. 3, 5 and 6, the absorbability for sticking the longitudinal end portion 40 of the three-dimensional gather portion 6 of the side surface materials 9, 10 shown in FIG. A method of manufacturing a product will be described. In the arranging step S1 of FIG. 6, the back sheet 2 and the center surface material shown in FIGS. 3 and 5 are bonded with an adhesive. Specifically, the back sheet 2 and the center surface material 8 are bonded by using hot melt 20. The side surface materials 9 and 10 are bonded to the back sheet 2 using the bonding portions 27. The side surface material 9 and the side surface material 10 are attached to the surface 8A of the center surface material 8 using hot melt 22.

In the arranging step S1 of FIG. 6, at the same time when the center surface material and the backsheet are bonded, the three-dimensional gather portion 6 is formed.
The elastic body 11 is disposed inside the folded-back portion 55 that is folded inside the side surface materials 9 and 10. That is, the elastic body 11 is arranged along the end portion 40 on the inner side in the longitudinal direction of the side surface materials 9, 10. In this way, in the arranging step S1, by arranging the elastic body 11 in at least the central portion of the side surface materials 9 and 10 in the longitudinal direction,
The three-dimensional gather portion 6 is expandable and contractable along the longitudinal direction L. In the arranging step S1, the back sheet 2 and the center surface material 8 may be bonded with an adhesive after the elastic body 11 is arranged along the end portion 40.

Next, in the pasting step S2 of FIG.
By applying pressure to the end portion of the folded portion 55 of the three-dimensional gather portion, the end portion of the three-dimensional gather portion 6, that is, the inner end portion 40 of the side surface material 9 is hot melted (adhesive) 20 to the center surface material. 8 is attached to the surface 8A. That is, as shown in FIG. 5, since the pressure PR is applied to the entire end region portion in the longitudinal direction L, the longitudinal end portions 40 of the side surface materials 9 and 10 are laminated to increase the thickness. A strong pressure PR will be applied,
The hot melt 20 penetrates the tissue 3 and the center surface material 8 as shown by the arrow E direction, so that the surface 8A of the center surface material 8 and the end portion 40 in the longitudinal direction.
Reach the inner side of. As a result, the portion where the hot melt 20 has penetrated can surely bond the inside of the end portion 40 in the longitudinal direction and the surface 8A of the center surface material 8 to form the adhesive portion 59. The surface 8A is a surface that comes into contact with the user's body. In this way, the portion of the hot melt 20 exuding through the center surface material 8 is the end portion 40 in the longitudinal direction of the three-dimensional gather portion, in other words, the end portion 40 in the longitudinal direction of the side surface materials 9, 10. Since it can be reliably attached to the surface 8A of the center surface material 8, there are the following merits.

As shown in FIG. 1, the central portion of the three-dimensional gather portion 6 can be reliably raised in the V direction when the oscillating 1 as shown in FIG. 1 is used. That is, since the end portions 40 on both sides of the three-dimensional gather portion 6 in the longitudinal direction L are attached and fixed to the center surface material 8, the three-dimensional gather portion 6 is reliably raised in the V direction with respect to the center surface material 8. be able to. As a result, it is possible to reliably prevent filth, urine, etc. from leaking outside along the lateral direction T by using the three-dimensional gather portion 6. In the longitudinal direction L
Since the ends 40 on both sides of the are bonded to the surface 8A using an adhesive, it is possible to prevent the liquid or the like from leaking out in the longitudinal direction L. Moreover, since the end portion 40 in the longitudinal direction is attached to the surface 8A, it is possible to prevent the end portion from coming into contact with the user's body and enhance the wearing feeling during use.

Next, referring to FIGS. 7, 8 and 10,
Another embodiment of the present invention will be described. FIG. 7 shows another embodiment of the laminated structure of the portion P of the staked portion 1 shown in FIGS. 1 and 2. FIG. 8 is an exploded perspective view of the embodiment shown in FIG. FIG. 10 shows an example of a method for manufacturing the diaper shown in FIG. Otome 1 shown in FIGS. 7 and 8
Is called an external folding type of the present invention, and the shapes of the side surface materials 9 and 10 are different from each other, as is apparent by comparing FIGS. 7 and 3. However, since the elements other than the side surface materials 9 and 10 of the rivet 1 in FIG. 7 are almost the same as the corresponding elements in FIG. 3, the same reference numerals are given and the description will be used. In the embodiment of FIG. 3, the insides of the side surface materials 9 and 10 have the folded-back portions 55,
The folded-back portion 55 is bent inward, and the folded-back portion 55 is bonded to the surface 8A of the center surface material 8.

On the other hand, in the embodiment shown in FIG. 7, the folded-back portion 155 located inside the side surface materials 9 and 10 is directed in the R direction toward the outside instead of the surface 8A side of the center surface material 8. It is bent into. The linear elastic body 11 is provided in the folded portion 155 of the side surface material 9 and the bag-shaped portion 155A of the folded portion 155 of the side surface material 10.
Are accommodated along the longitudinal direction L, respectively. The center surface material 8 and the side surface materials 9 and 10 are bonded by hot melt 122, respectively. The folded-back portions 155 of the side surface materials 9 and 10 are bonded to the surfaces 9A and 10A of the side surface material 9 by hot melt 122A.

As described above, in the diaper 1 shown in FIGS. 7 and 9, the folded-back portion 155 of the side surface material 9 and the side surface material 10 are formed.
The folded-back portions 155 are provided in an outwardly folded state by further bending in the R direction. The heat seal part 25 of FIG. 7 is formed on each of the side surface material 9 and the side surface material 10. This heat seal part 2
5, the bag-shaped portion 155A of the folded portion 155 is formed.

Next, the manufacturing method of the embodiment shown in FIGS. 7 and 9 will be described with reference to FIG. In the disposing step S11 of FIG. 10, the back sheet 2 and the center surface material 8 are arranged.
Are bonded by hot melt 20 which is an adhesive. At the same time when the back sheet 2 and the center surface material 8 are bonded,
In order to prevent the liquid from leaking, the elastic body 11 is arranged at least in the central portion of the side surface members 9 and 10 in the longitudinal direction to form the three-dimensional gather portion 6, and the three-dimensional gather portion 6 is formed.
Makes it stretchable along the longitudinal direction L. In this case, the elastic body 11 is arranged in the folded-back portion 155. The side surface materials 9 and 10 are fixed to the center surface material 8 using the hot melt 122. In this state, the folded-back portions 155 of the side surface materials 9 and 10 are arranged so as to overlap the center surface material 8. In addition, after the elastic body 11 is arranged in the folded portion 155 and the folded portion 155 is arranged so as to overlap the center surface material 8, the back sheet 2
The center surface material 8 may be bonded with an adhesive.

Next, in the pasting step S12 of FIG. 10, as shown in FIGS. 7 and 9, the three-dimensional gather portion 6, in other words, the folded-back portion 155 of the side surface material 9, is moved outward in the lateral direction T in the R direction. Fold outwards toward. Thereby, the folded-back portion 155 of the three-dimensional gather portion 6, that is, the folded-back portion 155 of the side surface material 9,
It is located on the surface 9 side of the side surface materials 9, 10. Moreover, the hot melt 122A is the surface 9 of the side surface materials 9 and 10.
The folded-back portion 155 is fixed to A and 10A. By using the heat seal portion 25, the elastic body 11 is reliably accommodated in the folded portion.

When pressure is applied from the upper part of the diaper 1 to the entire end portions P in the longitudinal direction, the folded-back portion 155 of the three-dimensional gather portion 6, that is, the folded-back portion 155 of the side surface material 9 in the longitudinal direction. Inner edge 140
The thickness increases due to the stacking, and a stronger pressure is applied, and the longitudinal end portion 140 of the folded portion of the three-dimensional gather portion is surely adhered by exuding in the direction of arrow E of the hot melt 20. You can Edge 140
The hot melt 20 exuded makes the adhesive 159
Thus, the center surface member 8 can be securely fixed to the surface 8A. The surface 8A is a surface that comes into contact with the user's body. By applying pressure to the end portion 140 in the longitudinal direction, the hot melt 20 can permeate the center surface material 8 and ooze out along the direction E as shown in FIG. Therefore, the bonding portion 159 can bond and fix the longitudinal end portion 40 and the surface 8A of the center surface material 8. Therefore, as shown in FIG. 1, the central portion of the three-dimensional gather portion 6 can be reliably raised in the V direction when the oscillating 1 as shown in FIG. 1 is used. That is, since the end portions 140 on both sides of the three-dimensional gather portion 6 in the longitudinal direction L are attached and fixed to the center surface material 8, the three-dimensional gather portion 6 is reliably raised in the V direction with respect to the center surface material 8. be able to. As a result, it is possible to reliably prevent filth, urine, etc. from leaking outside along the lateral direction T by using the three-dimensional gather portion 6. Further, since the end portions 140 on both sides in the longitudinal direction L are attached to the surface 8A with an adhesive, it is possible to prevent liquid or the like from leaking out in the longitudinal direction L. Moreover, since the end portion 140 on the inner side in the longitudinal direction is attached to the surface 8A, it is possible to prevent the end portion from coming into contact with the body of the user and to enhance the wearing feeling during use. Further, by using hot melt that is more easily exuded, the hot melt is further exuded to the side surface material surfaces 9A and 10A, so that the end portion of the folded-back portion 155 of the three-dimensional gathered portion 6 is made into the side surface material surface 9A, It may be more surely adhered to 10A. In this case, the user's body is not made uncomfortable, and the usability can be enhanced.

Next, referring to FIGS. 7, 8 and 10,
Another embodiment of the present invention will be described.

In the embodiment of the present invention, examples of hot melt adhesives include rubber hot melt adhesives such as SIS (styrene-isoprene block copolymer system) and SBS (styrene-butadiene block copolymer system). , SEBS (styrene ethylene butylene block copolymer type) and SEPS (styrene ethylene propylene block copolymer type) can be used.
As the polyolefin hot melt adhesive, for example, APAO (amorphous polyalphaolefin)
: Generally, a mixture of polyethylene, polypropylene, and polybutene, and EVA (ethylene vinyl acetate copolymer type) can be used.

The present invention is not limited to the above embodiment. In the above-mentioned embodiment, the description was made with the example of Oshime as an absorbent product, but the absorbent product of the present invention is a smaller absorbent product other than Oshime, for example, a feminine sanitary product or an auxiliary absorbent for incontinence. It can also be applied to various products such as sex products.

[0044]

As described above, according to the present invention,
It is possible to completely prevent leakage of urine and the like, and it is possible to enhance the feeling of wearing during use.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structural example of an oscillating member which is an example of an absorbent product of the present invention.

FIG. 2 is a plan view of the rivet of FIG.

FIG. 3 is a cross-sectional view showing an example of a laminated structure of a portion of FIG.

FIG. 4 is a perspective view showing each element of FIG. 3 in an exploded manner.

FIG. 5 is a diagram showing a state in which longitudinal ends are adhered by an adhesive.

FIG. 6 is a diagram showing an example of a method for manufacturing the diaper according to the embodiment of FIG.

FIG. 7 is a view showing another embodiment of the oscillating body which is an example of the absorbent product of the present invention, and is a view showing an example of the laminated structure of the portion of FIG. 1.

FIG. 8 is an exploded perspective view of the components of FIG.

FIG. 9 is a diagram showing a state in which longitudinal end portions are bonded in the embodiment of FIG. 7.

FIG. 10 is a diagram showing an example of a method for manufacturing the diaper according to the embodiment of FIG.

FIG. 11 is a diagram showing an example of an apparatus for manufacturing an absorbent product such as a diaper.

FIG. 12 is a view showing a conventional diaper.

FIG. 13 is a diagram showing an example of a laminated structure of a portion of FIG.

14 is a diagram showing another example of the laminated structure of the portion of FIG.

[Explanation of symbols]

1 ... Oshime (absorbent product), 2 ... Back sheet, 3 ... Tissue, 4 ... Absorber, 5 ... Surface material, 6 ... Three-dimensional gather part, 8 ... Center surface material, 9, 10 ... Side surface material, 11 ... Elastic body,
20 ... Hot melt (adhesive), 40 ... Longitudinal end portion, 59 ... Longitudinal end adhesive portion, 14
0 ... Inside end of longitudinal direction, L ... Longitudinal direction, T
... Short direction

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-9-173380 (JP, A) JP-A-9-99007 (JP, A) JP-A-3-165761 (JP, A) JP-A-63- 235501 (JP, A) JP-A-11-235357 (JP, A) JP-A-8-215239 (JP, A) JP-A-11-128269 (JP, A) JP-A-2-152451 (JP, A) JP 64-77607 (JP, A) JP 1-162808 (JP, A) JP 11-79504 (JP, A) JP 7-136208 (JP, A) JP 11-92742 (JP, A) JP-A 2-159273 (JP, A) JP-A 9-182768 (JP, A) JP-A 6-280102 (JP, A) Actually open 5-15933 (JP, U) Actual Kaihei 2-91524 (JP, U) International Publication 96/005359 (WO, A1) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A61F 13/15- 13/84 A61F 5/44

Claims (8)

(57) [Claims] 1. A backsheet for preventing liquid from permeating, a liquid-permeable center surface material arranged on the side in contact with the body, and a center sheet arranged between the backsheet and the center surface material. An absorber that absorbs and retains the liquid that has permeated the surface material; side surface materials that are respectively arranged along the longitudinal direction of the center surface material at both ends of the center surface material to prevent liquid permeation; The side surface material or the center surface material at least in the longitudinal central part of the three-dimensional gather portion formed elastically in the longitudinal direction so as to be able to expand and contract. The longitudinal end of the portion is attached to the surface of the center surface material that comes into contact with the body with an adhesive that attaches the back sheet and the center surface material. Absorbent product characterized by being. 2. The adhesive is a hot melt adhesive disposed between the back sheet and the center surface material, and the adhesive exuded through the center surface material by pressure is the three-dimensional gather portion. The absorbent product according to claim 1, wherein an end portion in the longitudinal direction is attached to a surface of the center surface material that comes into contact with the body. 3. A back sheet for preventing the permeation of liquid, a liquid-permeable center surface material arranged on the side in contact with the body, and a center sheet arranged between the back sheet and the center surface material. An absorber that absorbs and retains the liquid that has permeated the surface material; side surface materials that are respectively arranged along the longitudinal direction of the center surface material at both ends of the center surface material to prevent liquid permeation; In order to prevent the leakage of the side surface material, a three-dimensional gather portion formed to be elastic in the longitudinal direction by disposing an elastic body in at least the central portion in the longitudinal direction of the side surface material, and the three-dimensional gather portion is short-sided. The side surface material is adhered to the surface of the side surface material that contacts the body, and the three-dimensional gather formed by folding the three-dimensional gather portion outward in the lateral direction. The inner end in the longitudinal direction of the folded-back portion of the rear portion is attached to the surface of the center surface material that comes into contact with the body with an adhesive that attaches the back sheet and the center surface material. An absorbent product characterized by. 4. The adhesive is a hot melt adhesive disposed between the back sheet and the center surface material, and the adhesive exuded through the center surface material under pressure is the three-dimensional gather portion. The absorbent product according to claim 3, wherein an end portion of the folded-back portion on the inner side in the longitudinal direction is attached to a surface of the center surface material that contacts the body. 5. A method of manufacturing an absorbent product, which absorbs and holds a liquid in an absorbent body, comprising: a back sheet for preventing liquid permeation; and a liquid-permeable center surface arranged on the side in contact with the body. The three-dimensional gather portion formed by adhering the materials with an adhesive and arranging an elastic body at least in the central portion in the longitudinal direction of the side surface material or the center surface material so as to be able to expand and contract in the longitudinal direction to prevent liquid leakage. Arranging so as to overlap the center surface material, and applying pressure to a longitudinal end portion of a folded back portion of the three-dimensional gather portion formed by folding back the three-dimensional gather portion, thereby the three-dimensional gather portion. A longitudinal end portion of the backsheet and the center surface material by an adhesive agent that adheres to the surface of the center surface material that contacts the body. Ri attached method of manufacturing an absorbent product characterized in that it comprises the steps, a. 6. The adhesive is a hot-melt adhesive disposed between the back sheet and the center surface material, and the adhesive exuded through the center surface material by pressure is the three-dimensional gather portion. The method for manufacturing an absorbent product according to claim 5, wherein the longitudinal end of the absorbent article is attached to the surface of the center surface material that comes into contact with the body. 7. A method of manufacturing an absorbent product in which a liquid is absorbed and held in an absorbent body, wherein a back sheet for preventing liquid permeation and a liquid-permeable center surface arranged on the side in contact with the body. In order to prevent liquid leakage by adhering the materials, an elastic body is arranged at least in the central portion of the side surface material in the longitudinal direction to prevent the liquid from leaking. Arranging step to be arranged so as to overlap the material, by applying a pressure to the inner end in the longitudinal direction of the folded back portion of the three-dimensional gather portion formed by folding back the three-dimensional gather portion in the lateral direction, The body of the center surface material is bonded to the back sheet and the center surface material by an adhesive that attaches the inner end in the longitudinal direction of the folded portion of the three-dimensional gather portion. Method of manufacturing an absorbent product characterized by comprising a pasting step for pasting into contact surfaces, a. 8. The adhesive is a hot melt adhesive disposed between the back sheet and the center surface material, and the adhesive exuded through the center surface material by pressure is the three-dimensional gather portion. The method for producing an absorbent product according to claim 7, wherein an end portion of the folded-back portion on the inner side in the longitudinal direction is attached to a surface of the center surface material that contacts the body.