JP4015505B2 - Disposable items - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable article, and in particular, a disposable diaper, a disposable underwear, a disposable sanitary article, etc., a post-treatment tape for binding to a non-woven fabric constituting the disposable article at the time of disposal, and a fastening tape for wearing to a user It is related with the disposable article which fixed other members.
[0002]
[Prior art]
For example, a flat-type disposable diaper has a configuration in which an absorbent body is interposed between an outer sheet made by bonding a nonwoven fabric to the outer surface of a liquid-impermeable sheet and having a cloth-like feel and an inner sheet made of the nonwoven fabric. The front side flap and the rear side flap are formed in a vertically long shape from the front waist part through the crotch part to the rear waist part. . A fastening tape is provided on the rear side flap, and a front target tape is provided on the front waist, and the rear waist is applied to the back of the wearer and the front waist is applied to the abdomen. The disposable diaper is attached by fastening the flap fastening tape to the front target tape at the front waist.
[0003]
In addition, the pants-type disposable diaper is a flat-type disposable diaper in which a front side flap and a rear side flap are joined in advance to form a pair of left and right leg openings and a torso opening. It is the same.
[0004]
When a disposable diaper is used and then discarded, a fastening tape is used in the case of a flat type, and in the case of a pants type, it is arranged in a state of being folded into a Z-shape or a V-shape on the rear surface. Using a post-processing tape, the tape is bundled in a state of being wound in a small size or folded and discarded.
[0005]
As shown in FIG. 7A, the fastening tape and the post-treatment tape are formed by attaching one end of the tape 52 to the nonwoven fabric 51 covering the surface of the disposable diaper, and an adhesive layer 53 such as an adhesive or a hot melt adhesive. It is fixed and attached via.
[0006]
[Problems to be solved by the invention]
However, when the tape 52 is fixed to the nonwoven fabric 51 through the adhesive layer 53, the adhesive layer 53 is applied to the surface of the nonwoven fabric 51 when a large peeling force acts on the tape 52 as shown in FIG. Even if they are bonded, delamination occurs in the nonwoven fabric 51 and the tape 52 comes off, or the adhesive material does not sufficiently penetrate into the fibers of the nonwoven fabric 51 and is not firmly bonded, and the adhesive layer 53 is easily peeled off. There was a problem that sometimes.
[0007]
An object of this invention is to provide the disposable article which can improve the adhering performance of the other member adhering to a nonwoven fabric in view of the said conventional problem.
[0008]
[Means for Solving the Problems]
The present invention relates to a disposable article in which another member is fixed to a part of the nonwoven fabric constituting the disposable article, and the non-woven fabric fixing portion is mutually bonded in a state where the fibers constituting the non-woven fabric are consolidated over the entire fixing portion. It is composed of a fusion-bonded portion fused to the other, and another member is bonded and fixed to the consolidation-fused portion with an adhesive .
[0009]
According to this configuration, when the nonwoven fabric uses fibers of a low melting point material or fibers having a high melting point material as a core and the surface thereof covered with a low melting point material, the entire fixing portion of another member is heated. By pressing and forming a consolidated fused part, and fixing other members to the consolidated fused part with an adhesive, even if a large peeling force acts between the nonwoven fabric and the other members, the interlayer separation of the nonwoven fabric does not occur Moreover, since the smoothness of the surface of the non-woven fabric is increased and the adhesive strength between the adhesive such as an adhesive and the fiber is increased, the fixing performance of other members can be improved.
[0010]
Further, when the other member is a tape whose one end is fixed to the non-woven fabric and an adhesive portion provided at the other end can be bonded to an arbitrary portion of the outer surface, the one end of the tape is bonded to the consolidated fusion portion. When fixing, the interlayer separation of the nonwoven fabric does not occur even in the fixed portion of the tape where a large peeling force acts, and the non-woven fabric fused surface becomes flat and the adhesive strength between the adhesive material and the fiber increases. The tape fixing performance can be improved and a great effect is exhibited.
[0012]
In addition, the tape can be suitably applied to a post-processing tape that is bound at the time of disposal of a disposable product and a fastening tape that is attached to a flat-type disposable diaper.
[0013]
Moreover, when the fixing part of the fastening tape is inserted between the tape fixing parts made of the nonwoven fabric of the outer sheet and the inner sheet of the disposable diaper, and the fixing part both sides and the tape fixing part of both sheets are fixed, It can be attached more firmly.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to a disposable diaper will be described with reference to the accompanying drawings to provide an understanding of the present invention. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
[0015]
First, a first embodiment in which the present invention is applied to a pants-type disposable diaper to which a post-processing tape is fixed will be described with reference to FIGS.
[0016]
In FIG. 1, reference numeral 1 denotes a disposable diaper using a pant-type nonwoven fabric, and an outer surface sheet 2 and a nonwoven fabric which have a cloth-like feel by bonding the nonwoven fabric 2a to the outer surface of a liquid-impermeable sheet 2b such as a PE sheet. The rectangular sheet base material 5 comprised by the inner surface sheet 3 which consists of these, and the absorber 4 arrange | positioned among them is used. The sheet base 5 is formed with a counterbored portion 5a on both sides of the center and bent at the center, and the side edges 5b are connected to each other by heat sealing to form the body portion 6 and the leg portion 5a has a leg opening. The part 7 is formed and configured. A string rubber 9 is built in the trunk opening 8 of the trunk 6, and a string rubber 10 is also built around the leg opening 7.
[0017]
A post-processing tape 11 is disposed on the rear surface of the body 6 of the disposable diaper 1 for binding and discarding the disposable diaper 1 in a state of being folded down. As shown in FIG. 2A, the post-processing tape 11 has the base piece 12, the inner peeling piece 13, and the outer peeling piece 14 folded in a Z shape, and the base piece 12 is adhesive. It is fixed to the non-woven fabric 2 a of the outer surface sheet 2 through the material layer 15. The inner peeling piece portion 13 is adhered by the adhesive layer 16 so as to keep the folded state on the base piece portion 12, and is fixed to the surface of the outer peeling piece portion 14 facing the inner peeling piece portion 13 at the time of binding. An adhesive material layer 17 is provided, and the adhesive material layer 17 is kept folded on the inner peeling piece 13.
[0018]
When disposing of the disposable diaper 1, in a folded state, as shown in FIG. 2 (b), the outer treatment strip 11 of the post-treatment tape 11 is peeled off and the post-treatment tape 11 is stretched, By sticking the adhesive material layer 17 of the outer peeling piece 14 to a suitable place on the outer surface of the disposable diaper 1, the disposable diaper 1 is bound in a small folded state and discarded.
[0019]
In the present embodiment, in order to prevent the base piece portion 12 of the post-processing tape 11 from being easily detached from the nonwoven fabric 2a of the outer surface sheet 2, as shown in FIG. As shown in FIG. 3 (b), the fibers constituting the nonwoven fabric 2a are heat-pressed to form a consolidated fused portion 19 in which the fibers are fused together, and the pressure-adhered fused portion 19 is adhered. The base piece 12 of the post-processing tape 11 is fixed through the material layer 15.
[0020]
The non-woven fabric 2a uses bicomponent fibers in which a high melting point material such as PET or PP is used as a core and the surface thereof is covered with a PE low melting point material. It is formed by heating at a temperature of about 50 to 200 ° C. while applying a pressure of about 2.0 kg / cm ² . Further, as the adhesive layers 15, 16, and 17, for example, those having a styrene block polymer as a main ingredient are used, and specifically, styrene-butylene-styrene block copolymer (SBS), styrene-isobutylene-styrene block copolymer. A polymer (SIS) or the like is used.
[0021]
In this way, by forming the consolidation fusion part 19 in the tape fixing part 18 of the nonwoven fabric 2a, when the consolidation fusion part 19 was not formed, the 90 degree peel strength against the nonwoven fabric was 335 gf / 15 mm. In contrast, a 90-degree peel strength against a nonwoven fabric of 925 gf / 15 mm was obtained.
[0022]
In the description of the above embodiment, an example in which the post-processing tape 11 is fixed to the tape fixing part 18 with the adhesive material layer 15 is shown. However, the post-processing tape 11 may be bonded with another adhesive such as a hot-melt adhesive. When the post-processing tape 11 is provided with a low-melting-point material layer, the base piece portion 12 and the consolidation fused portion 19 of the post-processing tape 11 may be heated and melted to be integrally fixed. By using 18 as the fusion-bonding portion 19, delamination of the nonwoven fabric 2 a is prevented, and a high fixing force is secured. Further, since the surface of the nonwoven fabric is flat, the pressure-sensitive adhesive layer (adhesive layer) 15 can uniformly contact the consolidated fusion-bonding portion 19, and the nonwoven fabric 2a and the post-processing tape 11 can be firmly bonded.
[0023]
Next, a second embodiment in which the present invention is applied to a flat disposable diaper to which a fastening tape is fixed will be described with reference to FIGS. 4 and 5.
[0024]
In FIG. 4, the disposable diaper 21 includes a nonwoven fabric 22a bonded to the outer surface of a liquid-impermeable sheet 22b such as a PE sheet, and a nonwoven fabric 22a and a nonwoven fabric. In the configuration in which the absorber 24 is interposed between the inner sheet 23 and the inner sheet 23, it is formed in a vertically long shape extending from the front waist part 25 to the rear waist part 27 through the crotch part 26.
[0025]
Between the front waist portion 25 and the rear waist portion 27, elastic gathering members such as thread rubber are arranged in an extended state on both sides of the absorber 24 and joined to the sheet 23 to be gathered and gathered. An outer edge portion 29 is formed, and the front waist portion 25 and the rear waist portion 27 are configured to fit the waist by joining elastically stretchable members such as foamed polyurethane to the sheets 22 and 23 gathered. The front waist part 25 and the rear waist part 27 are respectively provided with a front side flap 31 and a rear side flap 32 extending outward on both sides.
[0026]
A fastening tape 33 is provided on the rear side flap 32, and a front target tape 34 serving as a fastening surface of the fastening tape 33 is provided on the front waist portion 25. The front target tape 34 is provided with an easy-release surface constituting a fastening surface on the surface thereof, and a mark line 34a is displayed.
[0027]
When the disposable diaper 21 is worn, the rear waist portion 27 is applied to the back side of the wearer, and the front waist portion 25 is applied to the abdomen side. The fixing position is determined, and it is fixed to the front target tape 34. A leg opening is formed by the fastening of the fastening tape 33, and the crotch portion of the wearer is wrapped by the outer edge portion 29, and the three-dimensional gather portion 28 is positioned inside thereof to prevent urine leakage.
[0028]
In the disposable diaper 21 having such an overall configuration, as shown in FIG. 5, the fastening tape 33 is provided with a fastening portion 35 for the front target tape 34 at the free end portion, and the fixing portion 36 at the base end portion is provided on the outer surface. Inserted and arranged between the nonwoven fabric 22a of the sheet 22 and the inner surface sheet 23 made of the nonwoven fabric, and the tape adhering portion 38 of the nonwoven fabric 22a and the inner surface sheet 23 is heated and pressurized to consolidate the fibers constituting the nonwoven fabric. The both sides of the adhering portion 36 are bonded to the non-woven fabric 22a and the inner surface sheet 23 via the hot melt adhesive 37.
[0029]
In this way, the fixing portion 36 of the fastening tape 33 is inserted between the outer sheet 22 and the inner sheet 23, and the tape fixing portion 38 of both sheets 22 and 23 is used as the non-woven compacted fusion portion 39. By heat-bonding at, it is possible to reliably prevent the fastening tape 33 from being firmly fixed and coming off unexpectedly.
[0030]
In this embodiment, since the fixing portion 36 of the fastening tape 33 is inserted between the outer sheet 22 and the inner sheet 23, the fixing strength of the fixing tape 33 can be increased. You may make it adhere | attach on the inner surface sheet 23 with the melt adhesive material 37. FIG. Further, other adhesives may be used for bonding, and both may be heat-sealed to each other. In that case, the non-woven fabric can be obtained by using the non-woven tape adhering portion 38 as the compacted fusion part 39. It is possible to stably obtain a high adhesive force by eliminating the delamination. Furthermore, since the surface of the nonwoven fabric is flat, the hot melt adhesive 37 can uniformly contact the consolidation fusion part 39, and the nonwoven fabric and the fastening tape 33 can be firmly bonded.
[0031]
Next, a third embodiment in which the present invention is applied to the fixation of the inner sheet and the absorbent body of a flat disposable diaper will be described with reference to FIG.
[0032]
In FIG. 6, reference numeral 41 denotes a disposable diaper, which is provided between an outer surface sheet 42 having a cloth-like feeling by laminating a nonwoven fabric on the outer surface of a liquid-impermeable sheet such as a PE sheet and an inner surface sheet 43 made of the nonwoven fabric. Further, an absorber 44 wrapped with crepe paper or the like is interposed. The inner sheet 43 and the crepe paper or outer sheet 42 on the outer surface of the absorber 44 are bonded together by a plurality of spiral hot melt adhesives 45. In the present embodiment, the bonding portion 46 to be bonded by the spiral hot melt adhesive 45 of the inner surface sheet 43 is preliminarily heated and pressed to melt the fibers constituting the nonwoven fabric in a consolidated state. It is set as the consolidation fusion part 47 which was made to wear. Accordingly, the inner sheet 43 and the crepe paper that surrounds the absorber 44 are not accidentally peeled off due to delamination of the nonwoven fabric constituting the inner sheet 43, and the inner sheet 43 and the absorber are not peeled off. 44 is fixed by a hot melt adhesive 45 with high adhesive strength. Further, since the surface of the nonwoven fabric is flat, the hot melt adhesive 45 can uniformly contact the consolidated fusion bonded portion 47, and the nonwoven fabric and the absorbent body 44 can be firmly bonded.
[0033]
Thus, according to the present embodiment, there is no fear that the inner surface sheet 43 and the absorber 44 are separated during use to give a feeling of foreign matter or discomfort, and the usability can be improved.
[0034]
【The invention's effect】
According to the disposable articles of the present invention, the anchor site of the nonwoven fabric, constituted by compaction fused portion fused to each other in a state of being compacted fibers constituting the nonwoven fabric over the whole surface of the anchor site, the Since other members are bonded and fixed to the fusion-bonded part with an adhesive , the nonwoven fabric uses low-melting-point material fibers or high-melting-point material cores whose surfaces are covered with low-melting-point materials. , solid Chakubui the heating and pressing as a consolidated fused portion, by bonding and fixing the other member by an adhesive to the consolidation fused portion, even when a large peeling force between the nonwoven fabric and the other member is applied Since the interlayer separation of the nonwoven fabric does not occur and the surface of the non-woven fabric is flat, the adhesive strength between the adhesive such as a pressure-sensitive adhesive and the fiber increases, so that the fixing performance of other members can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a disposable diaper according to a first embodiment of the present invention.
2A and 2B are enlarged cross-sectional views taken along the line AA in FIG. 1, wherein FIG. 2A is a cross-sectional view in a folded state, and FIG. 2B is a cross-sectional view in use.
3A and 3B show the main configuration of the embodiment, in which FIG. 3A is an overall front view of a disposable diaper, and FIG. 3B is an enlarged cross-sectional view taken along line BB in FIG.
FIG. 4 is a perspective view of a disposable diaper according to a second embodiment of the present invention.
FIG. 5 is an enlarged schematic cross-sectional view showing the main configuration of the embodiment.
FIG. 6 is an exploded perspective view of a disposable diaper according to a third embodiment of the present invention.
7A and 7B show a tape fixing structure in a conventional disposable diaper, wherein FIG. 7A is an enlarged sectional view and FIG. 7B is an enlarged sectional view showing a state when a peeling force is applied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Outer surface sheet 2a Non-woven fabric 11 Post-processing tape 15 Adhesive material layer 18 Tape fixing part 19 Consolidation fusion part 21 Disposable diaper 22 Outer sheet 22a Non-woven fabric 33 Fastening tape 37 Hot melt adhesive 38 Tape fixing part 39 Consolidation fusing Part 41 Disposable diaper 43 Inner surface sheet 44 Absorber 45 Hot melt adhesive 46 Adhesion site 47 Consolidation fusion part

Claims (6)

In a disposable product in which other members are fixed to a part of the nonwoven fabric constituting the disposable product, the non-woven fabric fixing part is fused to each other in a state in which the fibers constituting the non-woven fabric are consolidated over the entire fixing part. A disposable article characterized in that it is constituted by a compacted fusion part, and another member is adhered and fixed to the compacted fusion part with an adhesive . 2. The disposable article according to claim 1 , wherein the nonwoven fabric is made of a bicomponent fiber having a high melting point material as a core and a surface thereof coated with a low melting point material . The other member is a tape whose one end is fixed to the non-woven fabric, and an adhesive portion provided at the other end can be bonded to an arbitrary portion of the outer surface, and one end of the tape is fixed to the consolidation portion. The disposable article according to claim 1 or 2 . 4. The disposable product according to claim 3, wherein the tape is a post-processing tape that is bound when the disposable product is discarded. 4. The disposable article according to claim 3, wherein the tape is a fastening tape to which a flat disposable diaper is attached. The fixing part of the fastening tape is inserted between the tape fixing part made of the nonwoven fabric of the outer sheet and the inner sheet of the disposable diaper, and both the fixing part and the tape fixing part of both sheets are fixed. 5. Disposable items according to 5 .

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