Composite compositions with barrier properties and methods for the preparation thereof
AssigneeBoard of Trustees of Michigan State University
InventorsThomas J. Pinnavaia, Konstantinos Triantafyllidis, Peter C. LeBaron
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Abstract
Compositions including a fabric layer with a water-insoluble polymer impregnated into the fabric layer to provide sheets are described. In particular, the sheet composites have a permeability to oxygen in the direction perpendicular to the sheet that is less than one-tenth the transmission rate for the fabric layer alone and less than one-fifth the transmission rate for the polymer alone without the fabric layer.
Claims14
An container with a confined space with a low permeability to a gas or a vapor which comprises:
- a confined space formed at least in part with a composite composition which comprises:
- a sheet of a preformed porous fabric layer of overlapping, separate elongate members, which form the fabric layer, wherein each of the elongate members have a length, width or thickness which is less than about ten micrometers;
- and a water-insoluble polymer which has been impregnated into the fabric layer, wherein the composite composition has a transmission rate to oxygen that is less than one-tenth the transmission rate for the fabric layer alone and less than one-fifth the transmission rate for the polymer alone without the fabric layer, wherein the composite composition provides a barrier between opposed sides of the sheet in the enclosure.
A package for enclosing a material which comprises as part of the material for forming the package a composite composition which comprises:
- (a) a preformed, porous fabric layer of overlapping, elongate members which form the fabric layer, wherein each of the elongate members have a length, width or thickness which is less than about ten micrometers;
- and
- (b) a water-insoluble polymer which has been impregnated into the fabric layer, wherein the composite composition has a transmission rate to oxygen in a direction orthogonal to the layer that is less than one-tenth the transmission rate for the fabric layer alone and less than one-fifth the transmission rate for the polymer alone without the fabric layer.
Dependencies are inferred from the claim text.