WHITE, POROUS, SINGLE-LAYER POLYESTER FILM AND METHOD FOR PREPARING SAME
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United States of America Patent
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Issued Date -
Feb 12, 2009
app pub date -
Nov 20, 2006
filing date -
Nov 18, 2005
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Abstract
The present invention relates to a white, porous, single-layer polyester film comprising a polyester resin, particles of a noncrystalline polymer which has a heat deformation temperature higher than the temperature of the drawing process of said film by at least 10° C. and is not miscible with the polyester resin, inorganic particles and a whitening agent. The inventive single layer film has sufficient process stability as well as good optical properties, and thus is useful as a film for use in printing, labeling, electronics and display applications.
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