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Three-dimensional shaped forms for use in disposable absorbent articles

An absorbent article, a disposable technology, used in absorbent pads, medical science, bandages, etc., to solve problems such as fluid infiltration and adverse volume effects

Inactive Publication Date: 2019-07-02
KIMBERLY-CLARK WORLDWIDE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A barrier to achieving higher SAP particle loads is that current absorbent core designs are only capable of retaining and distributing a limited amount of fluid
In addition, higher amounts of SAP particles can lead to SAP gel pockets, which have an adverse effect on fluid percolation and volume of absorbent articles when wet

Method used

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  • Three-dimensional shaped forms for use in disposable absorbent articles
  • Three-dimensional shaped forms for use in disposable absorbent articles
  • Three-dimensional shaped forms for use in disposable absorbent articles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1: The first fixing agent 300 and the second fixing agent 500 used in the functional structure 100 of the present invention are prepared. A 10% polyvinyl alcohol aqueous solution ("PVA"; first fixative 300), a 10% polyvinylpyrrolidone ("PVP") ethanol solution and a cross-linked PVA gel were prepared. To prepare a 10% PVA aqueous solution, 10 grams of PVA particles are placed in a beaker. Take 1000ml of water and raise the temperature to 100°C through a heating mantle. Next, while stirring, slowly add 1000 ml of 100°C water to the PVA particles to ensure complete dissolution. The solution is then cooled and can be stored at room temperature until use. To prepare a 10% PVP solution (second fixative 500), 1000 ml of ethanol was added to 10 g of PVP and stirred at room temperature for 1 hour. After the PVP is completely dissolved, the solution can be stored at room temperature until use. In order to prepare the cross-linked PVA gel (first fixing agent 300), a 1%...

Embodiment 2

[0064] Example 2 : Prepare the main two-dimensional ("2D") functional structure 100 that can be used as a spunbond or SMS core wrap 740 containing superabsorbent ("SAP") particles. The functional core wrap 740 is formed by layer-by-layer ("L-B-L") composite formation using a soft template method (see also Example 10 below). First, the water-based PVA or cross-linked PVA gel layer is applied to a 50 cm x 20 cm ("cm") spunbond material (basis weight, 12gsm) or SMS (also 12gsm) sheet (spunbond and SMS materials are the substrate 200). The PVA concentration on the spunbond or SMS material can be selected and adjusted based on the final SAP particle concentration. A concentration between 0.1gsm and 1.5gsm (dry weight) can be achieved. Next, the required amount of SAP particles (0.1 g to 6 g; SAP particles are functional material 400) are sprinkled on the spunbond / SMS material. Due to the PVA / crosslinked PVA adhesive layer (acting as the first fixing agent 300), the SAP particles...

Embodiment 3

[0065] Example 3 : Prepare the functional structure 100 that can be used as a tissue containing superabsorbent ("SAP") particles, a co-formed material, or a spunlace core wrap 740. The same as Example 2, except that a thin paper material (25 gsm) is used to form the base 200 of the functional structure 100 to serve as the core wrap 740.

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PUM

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Abstract

The present invention relates to disposable absorbent articles that include a bodyside liner, an outer cover and an absorbent core between the bodyside liner and the outer cover. The articles also include a core wrap surrounding the absorbent core. Further, the articles include a shaped form between the core wrap and the absorbent core where the shaped form is a functional structure. The functional structure includes a substrate and a first fixing agent applied to the substrate. The first fixing agent includes an aqueous polymer. The functional structure also includes a functional material that is adjacent to the first fixing agent. A second fixing agent is adjacent to the functional material. The first fixing agent may be a hydrophilic solution including an aqueous polymer selected from polyvinyl alcohol and a cross-linked polyvinyl alcohol. The aqueous polymers may have molecular weights from 1,500,000 to 4,000,000.

Description

Background technique [0001] There are various limited-use products on the market that provide functional benefits. One class of such products are disposable absorbent articles. Disposable absorbent articles are generally composite materials generally having two-dimensional materials arranged in layers relative to each other. Two-dimensional materials are non-woven materials and functional materials. Nonwoven materials are usually based on polymers. Functional materials may include absorbent materials such as "fluff" and superabsorbent materials, as well as odor control materials such as charcoal or fragrance materials. [0002] The functional materials of absorbent articles can be some of the most expensive parts in the article, therefore, manufacturers want to maximize the effective use of these parts. In addition, for absorbent articles, it is desirable to place functional absorbent materials (superabsorbent materials and fibers / fluff) at precise positions within the absorbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F13/534A61F13/84A61F13/53
CPCA61F13/53A61F13/534A61F13/537A61F13/84A61F13/8405A61F2013/530131A61F2013/5349A61F2013/8408A61F13/15A61F13/53743A61F2013/530007A61F2013/530481A61F2013/53795A61L15/24
Inventor V·Y·乔西N·霍约斯M·伦登
Owner KIMBERLY-CLARK WORLDWIDE INC