TRENNFILM MIT VERRINGERTEM ÜBERTRAGBAREM SILIKONMATERIAL

摘要

A release film for label stock and the like having: (a) a cavitated layer of a thermoplastic polymer matrix material within which is located a strata of voids, positioned at least substantially within at least a substantial number of each of the voids is at least one spherical void-initiating solid particle which is phase-distinct and incompatible with the matrix material, the void space occupied by the particle being substantially less than the volume of the void, with one generally cross-sectional dimension of the particle at least approximating a corresponding cross-sectional dimension of the void; the population of the voids being such as to cause a degree of opacity of less than 70% light transmission; at least one surface of the layer free of any coating tending to mask the surface affects of cavitation; and (b) opposite to this surface, a coating of a release material of a type having a tendency to partially transfer to any contacting surface.