| 摘要 |
<p>White, coextruded, biaxially oriented polyester film comprises: a base layer comprised of thermoplastic polyester; and at least one outer layer (A) comprised of thermoplastic polyester. The base layer comprises, based on the total weight of the base layer, a whitening pigment (3-15 wt.%), and the outer layer (A) also comprises, based in each case, on the total weight of the outer layer (A), a whitening pigment (3-15 wt.%), a coated colorant phyllosilicate (0.5-15 wt.%) and carbon black (0.001-0.2 wt.%). Independent claims are also included for: (1) producing the polyester film, comprising coextruding and shaping polymer melts to give a flat melt film, producing a pre-film via cooling of the flat melt film on at least one take-off rolls, biaxially stretching the pre-film in the longitudinal and transverse direction, and heat-setting the biaxially stretched film; and (2) packaging material for foods and other consumable items comprising polyester film.</p> |
