Biaxially oriented polyester film having at least one matt side
AssigneeMitsubishi Polyester Film GmbH
InventorsHerbert Peiffer, Stefan Bartsch, Martin Mueller-Roosen
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Abstract
The invention relates to a biaxially oriented polyester film having at least one matt side and composed of at least one base layer (B) made from a thermoplastic polyester and of, applied to this base layer (B), at least one matt outer layer (A) which comprises at least 70% by weight of thermoplastic polyester. The outer layer (A) has a characteristic matt surface and characteristic optical properties and has good suitability for use as a packaging film or for industrial application. The invention further relates to the use and to a process for its production.
Claims14
A coextruded, biaxially oriented polyester film having at least one malt side and composed of at least one base layer (B) made from a thermoplastic polyester, and of, applied to this base layer (B), at least one matt outer layer (A) which comprises at least 70% by weight of thermoplastic polyester, based on the total weight of the matt outer layer (A), wherein the planar orientation p of the film is less or equal to 0.164 wherein the matt outer layer (A) comprises a pigment system in which the median diameter (d50) of the pigment grains is in the range from 2.0 to 8.0 pin, and in which the pigment grain diameter scattering expressed in terms of the SPAN 98, is less than or equal to 1.9.
Dependencies are inferred from the claim text.