Pressure sensitive label stock material possessing a wrinkle-resistant lustrous, opaque laminate film facing

Abstract

A pressure sensitive label stock material possessing a wrinkle-resistant lustrous, opaque biaxially oriented polymer film laminate facing layer for application to a collapsible wall type container is described. The facing layer includes: (a) a thermoplastic core layer having an upper and lower surface and a strata of voids located within said substrate layer, there being positioned within at least a substantial number of said voids at least one void-initiating particle which is phase distinct and incompatible with the surrounding thermoplastic material, the void space occupied by said particle being substantially less than the volume of said void, with one generally cross-sectional dimension of said particle at least approximating a corresponding cross-sectional dimension of said void; (b) a void-free thermoplastic skin layer affixed to the upper surface and, optionally, to the lower surface of core layer (a), and; (c) discrete areas of pressure sensitive adhesive directly or indirectly applied to the exposed surface of core layer (a) or, where an optional skin layer (b) has been applied to the lower surface of core layer (a), to the exposed surface of optional skin layer (b), the adhesive-free areas of the exposed surface of core layer (a), or, where present, the adhesive-free areas of the exposed surface of optional skin layer (b), exhibiting little or no tendency to adhere to the material of the collapsible wall type container to which the facing layer is applied.

Dependencies are inferred from the claim text.