JP3667353B2 - Liquid impervious protection - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a liquid impervious protective article in the form of a pant, and more specifically, for use as an absorbent product such as a diaper or a sanitary product and covers thereof, for preventing body fluid from leaking outside, The present invention relates to a liquid-impermeable protective article for adults, women, and infants.
[0002]
[Prior art]
Constructed with a liquid-impermeable sheet to avoid the risk of some body fluid leaking out and soiling clothing when fluids exceeding the absorbent capacity of the absorbent product are excreted when using diapers or sanitary products. It is common to wear protective equipment such as a pant-shaped cover or underwear. Since such a protective article needs to have sufficient liquid impermeability, it is generally configured using a sheet of a liquid impermeable synthetic resin or a sheet obtained by coating a cloth with a synthetic resin.
[0003]
[Problems to be solved by the invention]
The liquid impervious sheet used in such conventional liquid impervious protective articles has sufficient performance for liquid imperviousness, but lacks flexibility, and thus becomes a complex body shape when worn. It cannot fit, and satisfactory liquid leakage prevention performance is not realized. Another disadvantage is that conventional liquid-impermeable protective articles have no breathability, and thus cannot be avoided due to sweating during wearing, which also reduces the feeling of use. Furthermore, it is desirable to dispose of such a product once in terms of hygiene, but the liquid-impermeable sheet used in conventional products is expensive and difficult to make disposable.
[0004]
An object of the present invention is to provide a liquid-impermeable protective article that exhibits high flexibility in a worn state, and thus exhibits sufficient liquid leakage prevention performance and can be worn comfortably for a long time.
[0005]
[Means for Solving the Problems]
According to the present invention, the main body comprises a first part having a shape covering the front of the waist of the body and a second part having a shape covering the back of the waist of the body , and the two parts are joined by the coupling part. A liquid impervious protective article in the form of a pant covering the waist of the body, the entire body of which is composed of a composite sheet, the composite sheet comprising an elastic sheet and at least one of the elastic sheet It consists of a composite sheet made of a nonwoven fabric bonded to a surface, and between the elastic sheet and the nonwoven fabric, continuously in a first direction, discontinuously in a second direction orthogonal thereto, the nonwoven fabric is bonded to have a predetermined clearance with respect to the elastic sheet, the first mutually parallel multiple channels extending in the direction is formed over the entire surface, less of the channel Also liquid impermeable protective article, characterized in that the strip or fiber bundles of the superabsorbents is conformation within a portion is provided.
[0006]
The main body constituting the liquid-impermeable protective article of the present invention is a composite sheet in which a liquid-impermeable elastic sheet and a liquid-permeable nonwoven fabric are joined so as to form a large number of channels therebetween. Thus, the liquid is prevented by the outer liquid-impermeable elastic sheet and does not leak outside. In addition, the nonwoven fabric located inside forms a passage for air inside the channel and between the outer surface of the channel and the body surface of the wearer. It can be worn comfortably.
[0007]
Furthermore, according to the present invention, there is provided a liquid impervious protective article in which a body in the form of the aforementioned pants is provided with an absorbing means for absorbing body fluid. The absorbent means may be an absorbent product such as a normal diaper, sanitary napkin or incontinence pad.
[0008]
According to another aspect of the present invention, the composite sheet constituting the main body in the form of pants has an absorbent material arranged in the channel in at least a part of the main body.
[0009]
As an absorbent material to be seated in the channel, hydrophilic materials such as wood pulp and cotton, and synthetic fibers such as polypropylene and polyester can be used which have been subjected to appropriate hydrophilic treatment to impart hydrophilicity. Desirably, the so-called S. cerevisiae has the ability to absorb several tens of times its own weight of water or aqueous liquid. A. P. It uses a superabsorber called (Super Absorbent Polymer).
[0010]
The superabsorbent used in the present invention may be directly used in a particle state, but in this case, it is necessary to use a non-woven fabric constituting the channel wall having a high filter function to prevent the particles from falling off. Become. Accordingly, more preferable forms of the superabsorber include the following. That is, a strip-like material obtained by cutting superabsorbent particles and wood pulp or fiber web into a suitable width, or a superabsorbent in the form of fibers (for example, commercially available from Toyobo Co., Ltd.). There is a fiber bundle consisting of the trade name “Lanseal”. Further, a web whose surface is coated with a superabsorbent obtained by impregnating a fiber web with a monomer and then polymerized and crosslinked, for example, a compressed composite made by Warehauser, is slit into a strip shape, and the like.
[0011]
The volume of the absorbent material increases by absorbing the liquid. In particular, the volume difference between the superabsorber before and after liquid absorption is remarkably large. Therefore, when an absorbent material having a cross-sectional area that occupies most or all of the cross section of the space in the channel is seated, the channel is expanded in the cross section direction by the amount of expansion of the superabsorbent after absorption. However, since this expansion is absorbed mainly by the extension of the elastic sheet, there is no problem. However, if the expansion during absorption is significant, such as a superabsorbent, or if such dimensional changes are not desirable, the cross-sectional area of the absorbent material should not be larger than the cross-sectional area of the channel during the expansion. It is desirable to set to. In addition, by providing such a free space, the water swellability of the absorber is not hindered, so that the absorption power of the absorber can be fully exhibited.
[0012]
An embodiment of the present invention will be described below with reference to the drawings.
[0013]
【Example】
FIG. 1 is a perspective view showing an example of a pant-type liquid-impermeable protective article constructed according to the present invention, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. In the figure, the liquid-impermeable protective article includes a main body 10 including a first portion 11 having a shape covering the front of the waist of the body and a second portion 12 having a shape covering the back of the waist of the body. The first and second portions 11 and 12 are formed by cutting the composite sheet 1 described later into a substantially rectangular shape, folding it twice at the center in the length direction, and mutually connecting at the connecting portions 13 located on both sides. It is formed by bonding.
[0014]
The composite sheet 1 constituting the first and second portions 11 and 12 has a structure in which a nonwoven fabric 3 is bonded to one surface of a liquid-impermeable sheet-like elastic body 2 as shown in detail in FIG. Thus, the coupling between the two is performed only at the coupling line 4 extending in parallel with each other at a predetermined interval. The width of the nonwoven fabric 3 is larger than the width of the elastic sheet 2 between the two adjacent bonding lines 4 and 4, and as a result, extends in a direction parallel to each other between the elastic sheet 2 and the nonwoven fabric 3. A large number of channels 5 are formed. And this composite sheet 1 is cut | judged according to the shape of the desired 1st and 2nd parts 11 and 12, and a dimension, and it couple | bonds together so that the nonwoven fabric 3 may become inside.
[0015]
In the liquid-impermeable protective article 10 having such a configuration, the non-woven fabric 3 located on the inner side contacts the body when worn, and a number of elongated channels are interposed between the non-woven fabric 3 and the elastic sheet 2. 5 is formed. Therefore, the non-woven fabric 3 itself and the air permeability and flexibility of the channel 5 give an excellent feeling of use due to a good touch. Further, since the elastic sheet 2 located outside is liquid impermeable, it is possible to effectively prevent the liquid from leaking to the outside.
[0016]
In the example of FIG. 1, the main body 10 composed of the first and second parts 11 and 12 is single in all parts, but as shown in FIGS. 4 and 5, the first and second parts 11, A strip-shaped reinforcing member 14 obtained by cutting the same composite sheet 1 into an appropriate width can be stacked on each of the upper end portions of 12 to form a double structure. In this case, the strength of this portion increases and the elastic contraction force increases, so that it is not broken by careless handling at the time of wearing, and stability at the waist during wearing is improved. The main body 10 and the reinforcing member 14 can be easily combined using a thermocompression bonding or a hot melt adhesive. This reinforcing structure can also be formed by forming the main body 10 longer than a desired dimension and folding back the upper end.
[0017]
Further, as shown in FIGS. 6 and 7, a reinforcing member 15 cut into a shape corresponding to this portion can be overlapped to form a double structure in a portion corresponding to the crotch portion of the main body 10. Alternatively, as shown in FIGS. 8 and 9, the reinforcing members 14 a and 14 b may be attached to only two portions located around the leg hole of the main body 10. In any case, since the leg hole portion to which a large tensile force is applied at the time of attachment / detachment is doubled, breakage at this portion is effectively prevented.
[0018]
The reinforcement of the crotch part or the leg hole part may be used together with the reinforcement of the waist part shown in FIG.
[0019]
FIG. 10 shows a liquid impervious protective article 20 according to another embodiment of the present invention. In the liquid-impermeable protective article 20 of this example, the first part 11 and the second part 12 are joined by the joining part 13 and the folded part 14 is formed at the upper end part, as shown in FIG. While having the structure main body 10, the absorber 21 attached to the crotch part is provided. The absorbent body 21 may be in the form of a normal diaper or sanitary napkin, for example, and is fixed at a predetermined position by means such as adhesion with an adhesive or hot melt.
[0020]
Since the general absorbent body as described above has rigidity in itself and thus does not have stretchability and flexibility as the composite sheet, such a main absorbent body is composed of the composite sheet. When a rigid absorbent body is attached, expansion and contraction at the attachment portion is hindered. In order to avoid such an inconvenience, it is desirable to adopt an attachment structure as shown in FIGS. 11 and 12, for example. That is, the absorbent body 21 shown in FIG. 11 includes an absorbent material 22 and a liquid-permeable cover 23 that encloses the absorbent material 22, and is an adhesive only in a thin strip-shaped coupling portion 24 that extends almost the entire length in the center portion in the width direction. Alternatively, it is bonded to the nonwoven fabric side of the composite sheet 1 by means such as hot melt. According to such a configuration, the composite sheet receives less restraint due to the binding of the absorbent body 21, and the absorbent body 21 exists independently of the expansion and contraction motion of the composite sheet. Since it adapts to deformations or changes in dimensions due to absorption of liquid and does not deviate from a predetermined position, leakage is more completely prevented and at the same time a very comfortable feeling of use is provided.
[0021]
Alternatively, as shown in FIG. 12, an absorber 21 having a liquid-permeable top sheet 25 covering the upper surface and side surfaces of the absorbent 22 and a back sheet 26 covering the lower surface of the absorbent 22 is used for absorption. The extending portions of the top sheet 25 and the back sheet 26 extending to the side of the material 22 are bent into a U shape below the absorber 21, and are bonded or hot at a band-shaped coupling portion 27 located at the tip thereof. It can also be set as the structure couple | bonded with the composite sheet 1 by means, such as a melt. In this configuration, since the binding between the absorbent body 21 and the composite sheet is more partial, the absorbent body 21 is in a state of being lifted from the composite sheet, and the movement of the absorbent body 21 and the composite sheet The movement becomes more independent, and a leak-proof property and a comfortable feeling of use equivalent to or higher than those in the case of FIG. 10 can be obtained.
[0022]
FIG. 13 shows a liquid impervious protective article 30 according to another embodiment designed to further improve the effect of the present invention. In this example, as the composite sheet 1, as shown in FIG. 14, a composite sheet 1 in which an absorbent material 6 is arranged in a channel 5 formed between the elastic sheet 2 and the nonwoven fabric 3 is used. The absorbent material does not need to be provided on the entire composite sheet 1, and may be provided only on the crotch portion that may come into contact with the body fluid, as shown in FIG. Since the absorbent 6 absorbs the body fluid that has permeated the nonwoven fabric 3 and has flowed into the channel 5, it is not necessary to provide a separate absorbent body. As the absorbent material 6, an absorbent material generally used for diapers, sanitary napkins, etc. can be used in the form of a string, but the optimum absorbent material is a powder, rod-shaped or string-shaped super absorbent material. is there. Whatever absorbent material is used, it is desirable that its cross-sectional area be smaller than that of the channel 5 in order to absorb the expansion of the volume due to absorbing liquid.
[0023]
In addition, in each Example shown in FIGS. 1-14, a main body forms the notch used as a leg hole in the center part of the both-sides edge of the composite sheet 1 of one substantially rectangular shape, bends in the center, and is made in both side edges. As shown in FIG. 15, the main body 10 is formed by cutting the first portion 11 and the second portion 12 into separate bodies, and the connecting portion 13 on both side edges and the connecting portion 15 on the lower end. It can comprise by combining with.
[0024]
Further, in each of the above-described embodiments, the coupling portion that couples the first portion 11 and the second portion 12 to each other is an appropriate coupling means such as heat sealing, hot sealing, etc. with the nonwoven fabric 3 positioned inside facing each other. The composite sheet 1 may be bonded by bonding with a melt-type adhesive or the like. However, as shown in FIG. 16, the composite sheet 1 has an appropriate length at a portion corresponding to the bonding portion, preferably a length equal to the width of the bonding portion. It is desirable that the folded portion 1a is formed by folding outward, and the folded portion 1a is joined along the connecting line. In this case, the U-shaped non-woven fabric 2 is positioned at the tip of each joint, and compared with the case where the cut end of the elastic sheet 2 protrudes from this portion, the skin or other The feel or slip when touching the clothes is improved, and a good wearing feeling is obtained. Further, as shown in FIG. 16, the composite sheets 1 may be connected to each other in the connecting portions 13 and 15 along two connecting lines parallel to each other, but (a) to (n) in FIG. The pattern may be as shown in FIG. In particular, the discontinuous pattern shown in FIGS. 17 (b) to (n) has a lower bonding strength than the continuous line pattern, so it is desirable to tear the body 10 and remove it from the wearer, such as a diaper cover. Especially suitable for products.
[0025]
【The invention's effect】
As described above, the liquid-impermeable protective article of the present invention has the liquid-permeable nonwoven fabric on the inner surface of the liquid-impermeable elastic sheet, continuously in one direction, and in a direction substantially perpendicular to the liquid-permeable nonwoven fabric. Since it is composed of a composite sheet in which a plurality of channels extending in parallel with each other are formed between the nonwoven fabric and the elastic sheet, the body fluid leaks to the outside. While reliably preventing it from coming out, it is possible to give a comfortable feeling based on good touch and breathability. Moreover, it is also possible to provide an absorber in a predetermined position, and the two functions of the absorber and the protective article can be exhibited with a single article.
[0026]
Moreover, since the composite sheet is extremely flexible, it can be folded compactly, and even if an absorber is provided, it is convenient to carry. Moreover, since the whole cost is also low, it can be disposable.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a liquid-impermeable protective article according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
3 is a partial perspective view of a composite sheet used in the liquid-impermeable protective article of FIG. 1. FIG.
FIG. 4 is a perspective view of a liquid-impermeable protective article according to a second embodiment of the present invention.
5 is a cross-sectional view taken along line BB in FIG.
FIG. 6 is a front view of a liquid-impermeable protective article according to a third embodiment of the present invention.
7 is a cross-sectional view taken along the line CC in FIG . 6 ;
FIG. 8 is a front view of a liquid-impermeable protective article according to a fourth embodiment of the present invention.
FIG. 9 is a cross-sectional view along line D-D in FIG.
FIG. 10 is a cross-sectional view of a liquid impermeable protective article according to a fifth embodiment of the present invention.
11 is a cross-sectional view showing an absorbent body and a mounting portion thereof in the liquid-impermeable protective article of FIG.
12 is a cross-sectional view showing another absorbent body and a mounting portion thereof in the liquid-impermeable protective article of FIG.
FIG. 13 is a cross-sectional view of a liquid impermeable protective article according to a sixth embodiment of the present invention.
14 is an enlarged cross-sectional view of a part of FIG.
FIG. 15 is a perspective view showing a liquid-impermeable protective article according to a seventh embodiment of the present invention.
FIG. 16 is a cross-sectional view showing a preferred form of a coupling portion of the liquid-impermeable protective article of the present invention.
FIG. 17 is an explanatory view showing an adhesive pattern applied to the joint portion of the liquid-impermeable protective article of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sheet-like absorber 2 Elastic body 3 Nonwoven fabric 4 Bonding line 5 Channel 6 Absorbent material 10, 20, 30 Main body 11 First portion 12 Second portion 13, 15 Joint portion 14 Reinforcing member 21 Absorber 22 Absorbent material 23 Cover 24 connecting portion 25 top sheet 26 back sheet 27 connecting portion

Claims (2)

A pant that includes a first part shaped to cover the front of the waist of the body and a second part shaped to cover the back of the waist of the body , and the two parts are joined by a joint to cover the waist of the body A liquid-impermeable protective article having the form of: a body composed entirely of a composite sheet, the composite sheet being an elastic sheet, and a nonwoven fabric bonded to at least one surface of the elastic sheet The composite sheet is made of, and between the elastic sheet and the non-woven fabric, continuously in the first direction and discontinuously in the second direction orthogonal to the elastic sheet. the nonwoven fabric is bonded to have a predetermined clearance, the first mutually parallel multiple channels extending in the direction is formed over the entire surface, within at least a portion of said channel Te Liquid impermeable protective article, characterized in that Jo or fiber bundles of the superabsorbents is conformation.   The liquid-impermeable protective article according to claim 1, wherein the composite sheet is doubled in at least one portion of a waist portion, a crotch portion, or a leg hole peripheral portion of the main body.

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