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Hydrophilic apertured formed film

A hydrophilic, pore-forming technology used in bandages, shipping and packaging, absorbent pads, etc.

Inactive Publication Date: 2012-01-18
TREDEGAR FILM PROD CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] While various components of fatty substances of vegetable or animal origin are common in the art of forming film skins as surfactants and lotions, fatty alcohols had not been used as extrusion resin blends prior to the present invention. migrating surfactants in

Method used

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  • Hydrophilic apertured formed film

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Embodiment Construction

[0016] Fatty alcohols are aliphatic alcohols derived from natural fats and oils, mainly those derived from plants. Fatty alcohols generally have an even number of carbon atoms. N-chain alcohols, or otherwise expressed as alcohol groups (-OH) attached to terminal carbon atoms, are prepared from fatty acids. Other treatments result in isoalcohols with the alcohol group attached to the middle carbon atom in the carbon chain. The table below shows a series of fatty alcohols with the corresponding number of carbon atoms.

[0017] Table 1

[0018]

[0019] As the number of carbon atoms decreases, the melting point of fatty alcohols also decreases. For example, fatty alcohols with 14 carbon atoms melt at about 100°C, and fatty alcohols with 12 carbon atoms melt at about 24°C (room temperature). In designing an apertured formed film for a particular use in an absorbent article, the applicable temperature limitations will be apparent to the designer. If the fatty alcohol suspen...

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Abstract

An apertured formed film particularly suited for use as a topsheet or transfer layer in an absorbent article comprises at least one thermoplastic olefin polymer and a fatty alcohol in an amount sufficient to increase the hydrophilic affinity of the film.

Description

Background technique [0001] The present invention relates to disposable absorbent articles, and more particularly to apertured vacuum-formed or hydroformed three-dimensional films having an affinity for liquids. [0002] Apertured formed films are plastic films that have been processed to create holes or holes in the film. Porous films are generally divided into two categories: three-dimensional films and flat films. All three-dimensional structured films have a normal thickness, but the "three-dimensional films" of the present invention (also referred to herein as "formed films") have surface structures or protrusions extending from the film surface to the termination of the pores. These protrusions make the membrane thicker than the nominal thickness of the membrane. Such membranes are characterized by a thickness or loft, which is defined as the distance between the base of the membrane and a second plane defined by the holes where the protrusions terminate. The second p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/00
CPCC08J3/00A61F13/5376C08J5/18C08J2323/06A61F2013/53782A61F13/00Y10T428/24331Y10T428/24273A61F13/53A61L15/48C08K5/05C08L23/00
Inventor A·D·马斯奇诺A·W·格罗斯
Owner TREDEGAR FILM PROD CORP