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Disposable diaper

a disposable diaper and diaper technology, applied in the field of disposable diapers, can solve the problems of reducing distribution efficiency, reducing the efficiency of distribution, and reducing the number of diaper packages, so as to achieve excellent leakproofness, light and compact, convenient to carry

Inactive Publication Date: 2005-07-14
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The design achieves a balance of lightness, compactness, and high leakproofness, preventing urine leakage whether in sudden or prolonged discharge, while allowing the diaper to restore thickness for comfortable use.

Problems solved by technology

However, packages containing several disposable diapers now on the market are still fairly heavy, some exceeding 3 kg, and carrying a package has been a considerable burden.
It is a conceivable solution for lightening a package of disposable diapers to decrease the number of disposable diapers per package, but such reduces distribution efficiency, incurring an increase of unit price and increasing the frequency of consumer purchases.
Mere cutting down the absorbent material to reduce the weight of individual disposable diapers would result in frequent leaks, making the diapers useless.
If absorbent articles such as disposable diapers are made thinner to make the package more compact, the absorbent article feels flimsy and makes a user feel a fear of leakage.
According to this technique, it is possible to provide an absorbent article which comprises an ultrathin absorbent member and yet gives easy feelings, but the package is not at all compact.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0097] A superabsorbent polymer A having a rate of absorption of 11.8 g / 30 sec / 0.3 g by the DW method (10SH-P (trade name), available from Sumitomo Seika Chemicals Co., Ltd.) and a superabsorbent polymer B having a rate of absorption of 3.6 g / 30 sec / 0.3 g by the DW method (CA-W4 (trade name), available from Nippon Shokubai Co., Ltd.) were mixed at a polymer A / polymer B weight ratio of 50 / 50 to prepare a mixed superabsorbent polymer. PP / PE core / sheath conjugate fiber and PET fiber were mixed at a weight ratio of 70 / 30 and fabricated into airthrough nonwoven fabric having a basis weight of 30 g / m2. The mixed superabsorbent polymer was scattered on the nonwoven fabric in an amount of 200 g / m2 to be held in the interstices of the fibers. A tissue having a basis weight of 15 g / m2 was wrapped about the nonwoven fabric having the polymers held therein to make an absorbent member.

[0098] A PP / PE nonwoven fabric was put on one side of the absorbent member as a topsheet, and on the other side...

example 2

[0099] A hot-melt adhesive was applied to a tissue, and the mixed superabsorbent polymer prepared in the same manner as in Example 1 was scattered thereon in an amount of 200 g / m2. Another tissue having a hot-melt adhesive applied thereto was superposed thereon to make an absorbent member. A disposable diaper was obtained by using the resulting absorbent member in the same manner as in Example 1.

example 3

[0110] The superabsorbent polymers A and B used in Example 1 were mixed at a polymer A / polymer B weight ratio of 30 / 70 to prepare a mixed superabsorbent polymer.

[0111] The mixed superabsorbent polymer, fluff pulp and heat-fusible PP / PE core / sheath conjugate fiber were mixed up at a weight ratio of 85 / 10 / 5 and built up into a sheeting having 200 g / m2 of the mixed superabsorbent polymer, 24 g / m2 of fluff pulp, and 12 g / m2 of the heat-fusible conjugate fiber. The resulting fiber aggregate was wrapped in a tissue having a basis weight of 15 g / m2 and subjected to a heat treatment to make an absorbent member having a fluff content of 9% by weight.

[0112] A medium size disposable diaper for babies having the form of FIG. 1 was prepared in the same manner as in Example 1, except for using the above prepared absorbent member.

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PUM

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Abstract

A disposable diaper is provided comprising a liquid permeable topsheet, a liquid impermeable backsheet, and a liquid retentive absorbent member interposed between the topsheet and the backsheet. The absorbent member comprises, in admixture, a superabsorbent polymer A having a rate of absorption of 8 g / 30 sec / 0.3 g or more measured by DW method and a superabsorbent polymer B having a rate of absorption of 5 g / 30 sec / 0.3 g or less measured by DW method at a polymer A / polymer B weight ratio of 90 / 10 to 10 / 90. The admixture optionally further comprises fluff pulp in an amount of from 0 to 30% by weight.

Description

TECHNICAL FIELD [0001] The present invention relates to disposable diapers which are light and compact and easy to carry around even when bunched up in a package and which are excellent in leakproofness. [0002] The present invention also relates to absorbent articles, such as disposable diapers, which are light and yet has a moderate thickness to secure an easy feeling while in use. BACKGROUND ART [0003] Improvements have been added to the structure and materials of disposable diapers to provide compact packages convenient to carry. [0004] However, packages containing several disposable diapers now on the market are still fairly heavy, some exceeding 3 kg, and carrying a package has been a considerable burden. [0005] It is a conceivable solution for lightening a package of disposable diapers to decrease the number of disposable diapers per package, but such reduces distribution efficiency, incurring an increase of unit price and increasing the frequency of consumer purchases. [0006]...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61F13/15
CPCA61F13/15203A61F13/531A61F2013/530722A61F2013/530715A61F2013/530708
Inventor MINATO, MASANORIYANAGIHARA, SHIGETOISHIGURO, KENJISUZUKI, MIKIOMASUKI, TETSUYA
Owner KAO CORP
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