Patent ID: 8354169
Filing Date: 2013-01-15
Classification: C08J,C08K,C08L,C09D,D21H,Y10T

Abstract:
1. A packaging film which comprises a barrier coating adhered to a polymeric substrate, wherein the barrier coating is prepared by forming a film from a concentrated dispersion which includes: a) a liquid carrier medium which includes primarily water; b) an exfoliated silicate filler material dispersed in the carrier medium; and c) a matrix polymer which is dispersed in the carrier medium, wherein the concentrated dispersion is made by way of dispersing the filler material and the polymer matrix in the liquid carrier medium, and increasing the solids content of the initial dispersion by at least 5% by selectively removing a portion of the liquid carrier medium prior to application on the substrate and then drying the concentrated dispersion to produce the barrier coating film, wherein the dried coating exhibits oxygen permeability at least 10 percent lower than a like coating which is prepared from a like dispersion that did not undergo selective removal of the liquid carrier medium.