JPS6072548A - Disposable diaper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the stretchable portion of a baby diaper.

Conventionally, in place of conventional non-water-absorbent stretchable materials such as rubber on both sides of the inseam area of diapers, the length shrinks when it comes into contact with water.
A device to which water-absorbing fibers exhibiting elasticity are attached is known, for example, in JP-A-57-35002.

According to this known diaper, the elastic function does not work after wearing it, and after urinating, the water absorbs the water.
! Since it contracts when it comes into contact with III and exerts an elastic function, there is an advantage that the time required to compress IJ is short and the ability to trace the air is maintained over that time. However, even with the bending and urination Mu, as well as the first pressure, the diaper, which does not shrink to the extent that the water-absorbing fibers form, is in the same condition as a conventional diaper that does not have the elastic part side U1i+. , Urine may suddenly leak out depending on the posture and wearing condition of the X5 user. In addition, a lifting platform from which diarrhea-like liquid stool is discharged before urination does not have a leak-preventing function, and has the drawback of lacking safety and reliability.

The first main object of the present invention is to eliminate the above-mentioned disadvantages, and the second main object of the present invention is to eliminate the above-mentioned disadvantages in terms of elasticity around the waist of the wearer. 11 diapers. ! The present invention will be described below based on the illustrated embodiments.

1 to 4 show a first embodiment of the present invention,
Also, Figure 1 is a partially cutaway flat curved diagram, and Figure 2 is Figure 1A.
-A mode of a cross-sectional view taken along line A is shown.

The diaper 1 includes a water-permeable top sheet 2 made of a non-woven fabric, a water-impermeable line sheet 3 made of a flexible synthetic resin film, an absorbent body 4 such as a Kishi Fiber Valve, and a lateral side from the absorbent body 4. It includes a telescopic side 6 which is interposed in the vertical direction of each side flap 5 formed by 1m of both sheets 2 and 3 extending outward, and which allows the waist to be narrowed when using rice. It is equipped with a tape fastener 7 for this purpose. The structure of the diaper 1 generally known in the past.

The stretchable part side 6 is composed of a thread-like non-water-absorbing stretchable member 6a that exhibits elasticity and a tape-shaped water-absorbent stretchable member 6b that exhibits elasticity and shrinks in length upon contact with water. The non-water-absorbent elastic member 6a faces the back sheet 3 side, the absorbent elastic member 6b faces the top sheet 2 side, and the MiJ members are oriented at one interval in the width direction in the latter width region. has been done.

At least one non-water-absorbing elastic member 6a is provided, so that the object of the present invention can be achieved).
11th page Tsugaku003~o6mrrL2 Teal? U It is preferable that it consists of several thread-like rubber, and the magnification is 1.5 to 6 times, and its pulling force is 50. ~25
Preferably, it is 0r. In particular, when multiple thread-like rubbers with a diameter of 0.03 to 06 mm+j are used, it is effective as a wide band.
In addition, the installation elongation and number can be freely changed to RB and V nodes as needed, and the thread-like rubber is very thin, so
It is convenient to increase the expansion magnification during installation, and the cost is also much lower than the conventional single flat rubber hand.

If the stretching magnification at the time of installation of the stretched kJ tsuki 6a is less than 15 times, the function is virtually absent, and if it is more than 6 times, it exceeds the elastic limit of the rubber currently in practical use. In addition, if the tensile force is generally not greater than IOU P, a gap is likely to occur between the diaper and the wearer's leg area, so for conventional diapers with inner and outer members, the tensile force is within the range of 100 to 400 r. However, in the present invention, in order to provide appropriate elasticity to the chest area of the diaper and to obtain elasticity that allows it to lightly touch the wearer's leg area, its strength is 50%.
The water-absorbing elastic member 6b made of polyvinyl alcohol (PVA)
) is made of fibers, has a shrinkage rate of 15% or more of the original length when in contact with water, shows the maximum shrinkage rate in water at 0 to 50°C, and has a strong contraction force of 3θ to 100 f. It is preferable that there be. One of the preferred such fibers has a saponification degree of 98
% of PVA is made into fibers by dry spinning and stretched 4.5 times. It is a tape-like product obtained by cutting a nonwoven fabric produced by the needle punching method into a width of 15 to 4 QynyrL2, preferably 25 to 35BB2. In addition, in order to obtain a product with the same effect as the above-mentioned tape, a PVA film with the same effect is formed into a tape of an appropriate width and then stretched, or the tape is moistened and stretched and dried in a slightly swollen state. May be processed.

The elastic member 6b may be made of the PVA fiber described in +1j alone, or may be made of a mixture of this and other fibers that do not change in any way even when they come into contact with water in order to obtain strength at the time of expansion. If the contraction rate of the elastic member 6b is not more than 15%, preferably 20%, a gap will be created between the diaper and the legs of the person suffering from diarrhea, and if the contraction force is less than 30 f, the elastic part Even if it is used in combination with 6a, it is not possible to obtain the required pressure contact force, and if it is more than 100f, the above-mentioned l51 used in combination.
Combined with the retracting force of the elastic member 6a, this becomes too high, resulting in undesirable compression marks around the legs of the wearer, especially infants.

It is preferable that the elastic members 6a, 6b be attached to the diaper using a pot-melt type adhesive, but other staining agents or adhesive methods may be used, such as a melt bond method depending on the material. And Shin & i = i part profit 6b
develops contractility only when it comes into contact with water, so
The adhesion with the diaper is preferably intermittent rather than continuous, and there are no particular restrictions on the elastic member 6a.

3 and 4 show a second embodiment of the present invention,
Fig. 3 is a partially cutaway developed plan view, and Fig. 4 is a partially cutaway plan view.
A front view taken along line B-B in the figure is shown.

In the invention of the second drawing shown here, in addition to the structure of the invention, each end flap 8 formed by the top sheet 2 and the back sheet 3 extending outward in the longitudinal direction of the diaper 1 has the above-mentioned structure. It has a configuration in which 6b is attached to the telescopic member. However, although not shown in the drawings, in the present invention, the telescoping parts 6a and 6b may be provided alone, or they may be attached to only one of the end flaps 8, 8. It's okay. In addition, in this embodiment of the present invention, a water-absorbing elastic member 6b' formed in the form of a thread having the same effect as the elastic line 1fA6b is attached to the innermost part of both sides of the crotch area of the diaper 1 and extending along the entire length along the inner side thereof. This makes it possible to respond quickly when urination occurs.

In the first and second scans of the present invention, although not shown, the elastic member 6a,
6b may be used alone or in combination with the symbol i as appropriate.

In the present invention having the above-described structure, until the diaper is worn and urinates, the diaper remains in close contact with the wearer's body area, especially the chest area, and in such a state, the breathability Not only does it keep the diapers in good condition, but it also eliminates all the drawbacks of the squeaking of known diapers mentioned above.
The purpose of the r period can be achieved. When urination occurs, the elastic force of the water-absorbing elastic member, which contracts upon contact with the urinary material, and the non-water-absorbing elastic material, which always exhibits ambiguity, and the Iis material combine to meet the general demands of this Yuzu diaper. Moderate tightening can change the condition and effectively prevent urine leakage. Needless to say, the water-absorbing stretchable part side also has an effect as an indicator of the presence or absence of urination.

In addition, as in the embodiment, a non-water-absorbing elastic member and a water-absorbing elastic member
When using J-Tori in combination, it is possible to attach them to the diaper after joining the former to the latter, which makes it easier to dispose of the diaper, especially when multiple pieces of the former are used. Suitable for high productivity.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway developed plan view showing an embodiment of the first J diaper, Figure 2 is a cross-sectional view taken along line A-h1M in Figure 1, and Figure 31 is the second book. FIG. 4 is a partially cutaway developed plan view of the invention diaper, and FIG. 4 is a sectional view taken along line IB-B. l... Oops 2... Top sheet 3... Back sheet 4... Absorbent body 5... Side 7 rasob 6a... Non-water-absorbing elastic member 6b... Water-absorbing elastic member 8. ...End 7 Rasop Figure 2

Claims (1)

Scope of Claims: (1) includes a water-permeable top sheet, a water-impermeable back sheet, an absorbent body, and an elastic member, the absorber being interposed between the bends of both sheets, and the elastic member being the absorber; A disposable diaper attached to each side flap in at least the crotch area formed by the two sheets extending laterally and outwardly from the body, characterized by including the following skewer item: The said diaper. a. The elastic member consists of a combination of a thread-like non-water-absorbing elastic member that always shows elasticity and a tape-like water-absorbing elastic member that shrinks in length and becomes elastic when it comes into contact with water; b. @iJ note The non-water-absorbing elastic member has an elongation factor of 1 when installed.
．． 5 to 6 times, the tensile strength is 50 to 250 f, and 1 c, it) water absorption elongation, the member has a shrinkage rate of 20% or more when water is absorbed, and a shrinkage force of 30 to 100 v. . (2) The disposable diaper according to item 1, wherein the non-water-absorbing elastic member and the water-absorbing elastic member are arranged to overlap each other. (3) The non-water-absorbing elastic member forest has a cross section of 0.0.
The disposable diaper according to claim 1, which is a plurality of thread-like combs having a diameter of 3 to 0.6 rrL. (4) The disposable diaper according to claim 1, wherein the water-absorbing elastic member is a nonwoven fabric having a weight of 20 to 100 g per month and containing polyvinyl alcohol fiber as a main component. (5) The disposable diaper according to claim 4, wherein the water-absorbing elastic member is made of polyvinyl alcohol fibers and fibers whose length does not substantially change even when they come into contact with water. (6) The non-water-absorbent stretch striped member is arranged so as to face the water-impermeable back sheet, and the water-absorbent stretch strip member faces the water-permeable top sheet. The disposable diaper according to item 1, 3 or 4. (7) A water-permeable top sheet, a water-impermeable back sheet, an absorbent body, and first and second elastic parts, the absorbent body being interposed between the two sheets, and at least the first part of RJU. The elastic member is inserted in the longitudinal direction of each side flap formed by the two sheets extending laterally and outwardly from the absorbent body, A disposable diaper that is interposed in at least one of the end flaps formed by the MiJ recording sheets extending outward from the absorbent body in the introduction direction, and characterized in that it includes the following items: Diapers. a, ii The first elastic member in J consists of a combination of a thread-like non-water-absorbing elastic member that always shows elasticity and a tape-shaped water-absorbing elastic member that contracts in length and loses its elasticity when it comes into contact with water. , and the second elastic member described by mouth + j is a combination of the single stretch and 1 part width, and b, the non-water-absorbing stretch and 1 part width of RiJ have an elongation magnification of 1.5 to 6 at several times. The tensile strength is 50-2502, and the shrinkage rate of the water-absorbing elastic member when it absorbs water is 20% or more, and the shrinkage force is 30-100. (8) The disposable diaper according to claim 7, wherein the non-water-absorbing elastic member and the water-absorbing elastic member are arranged to overlap each other. (9) The non-water-absorbing elastic member has a cross section of 0.03
The disposable diaper according to claim 1IIj, which is a plurality of thread-like rubber having a value of ˜Q, 5 rrLm, 2. α1 The above-mentioned water-absorbing elastic member or polyvinyl alcohol fiber as the main component 1~2o~1oo y/rr? (11) The water-absorbing stretchable member is made of polyvinyl alcohol fibers and fibers that do not substantially change in length even when in contact with water. A disposable diaper according to claim 10, comprising: