Membranes with fluid barrier properties and articles containing such membranes

a technology of fluid barrier and membrane, which is applied in the field of membranes, can solve the problems of many inflated articles, not attractive, and only the barrier material layer has the elasticity required for cushioning devices, etc., and achieves the effects of increasing the ability of the membrane to prevent transfer, increasing the opacity or haziness of the membrane, and dimensional stability

Inactive Publication Date: 2005-02-10
NIKE INTERNATIONAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a membrane having at least one layer, with the membrane comprising at least one elastomeric material and at least one polymeric fluid barrier material, in which a laminar nano-filler having an average platelet thickness of up to about 10 nanometers and an average aspect ratio of at least about 200 is present in at least one of the membrane layers. The membrane preferably includes at least one elastomeric layer containing an elastomeric material and at least one barrier layer containing a polymeric fluid bar

Problems solved by technology

While thermoplastic barrier films may be flexed to a certain extent due to their thinness, thermoplastic barrier films having only barrier material layers generally do not have sufficient elasticity for many applications, particularly for applications in which the inflated bladder is sub

Method used

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  • Membranes with fluid barrier properties and articles containing such membranes
  • Membranes with fluid barrier properties and articles containing such membranes
  • Membranes with fluid barrier properties and articles containing such membranes

Examples

Experimental program
Comparison scheme
Effect test

example 1

Two single-layer sheets of ethylene-vinyl alcohol copolymer [EVOH] containing 5% by weight of a laminar non-filler are prepared using ETC-133 from Kuraray / Evalca as the EVOH and Cloisite 15A (a nano-filler clay treated with dimethyl, dihydrogenated tallow, quaternary ammonium chloride) and Cloisite 30A (a nano-filler clay treated with methyl, tallow, bis-2-hydroxyethyl, quaternary ammonium chloride) as the filler. These samples were produced in a concentrate then diluted as follows: First, a high clay containing polymer sample was produced via extrusion. Then, the concentrate was re-extruded with the desired amount of polymer to achieve the 5% by weight clay content. The extrudate from this second extrusion was pelletized to produce extruded ETC-133 clay nanocomposite pellets.

The increased barrier properties of the barrier nanocomposite layer was determined as follows. The extruded ETC-133 clay nanocomposite pellets were extruded to produce 1 mil-thick cast film for gas transmiss...

example 2

The extruded ETC-133 clay nanocomposite pellets of Example 1 are extruded to form a microlayer polymeric composite according to Example 1 of Bonk et al., U.S. Pat. No. 6,082,025, with the extruded ETC-133 clay nanocomposite pellets of Example 1 replacing the LCF 101A material of the patent example. The microlayer polymeric composite is formed into a sealed, inflated bladder, which is then incorporated into a sole of a shoe as described in Example 1.

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Abstract

A membrane comprising at least one elastomeric material, at least one polymeric fluid barrier material, and a laminar nano-filler having an average platelet thickness of up to about 10 nanometers and an average aspect ratio of at least about 200 provides desirable appearance and low gas transmission characteristics. The membrane may be a single layer, but preferably the membrane includes at least one layer of an elastomeric material and at least one layer of a polymeric barrier material, in which the elastomeric material layer and/or the polymeric barrier material layer comprises the laminar nano-filler.

Description

FIELD OF THE INVENTION This invention concerns membranes including fillers suitable for applications that require both barrier properties and flexibility, particularly for use in preparing bladders for inflated objects and cushioning devices. The present invention further relates to articles that are inflated or have inflated elements. BACKGROUND OF THE INVENTION Barrier membranes and inflatable bladders formed from such membranes have been used in a variety of products for inflation or cushioning, including vehicle tires, balls, accumulators used on heavy machinery, and in footwear, especially athletic shoes. It is often desirable to use polymeric materials that are thermoplastic to form the membranes because thermoplastic materials may be reclaimed and reformed into new articles, thus reducing waste during manufacturing operations and promoting recycling after the useful life of an article. While thermoplastic barrier films may be flexed to a certain extent due to their thinness...

Claims

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Application Information

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IPC IPC(8): A43B13/12A43B13/20B32B25/08B32B27/18B65D1/00C08L
CPCA43B13/026A43B13/12A43B13/20B32B25/08B32B27/18Y10T428/1352B32B27/40B32B2250/24B32B2250/42B32B2274/00B32B2437/02B32B27/306B65D1/00B65D81/03B82Y30/00B32B27/20B32B2264/10
Inventor CHANG, YIHUAWATKINS, RICHARD L.
Owner NIKE INTERNATIONAL LTD
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