Importance

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Abstract

The invention relates to a process for producing a foam film laminate having at least one compact outer layer and at least one layer composed of extruded foamed polymer bound to the outer layer, wherein the production of the layer of foamed polymer is effected in such a way that a polymer material is admixed with a chemical blowing agent which is solid at room temperature and, during or after the extrusion, is heated up to or above the activation temperature of the blowing agent, in order to obtain the layer of foamed polymer, wherein the processes is characterized in that the polymer material contains 5% to 60% by weight of at least one HMS polyolefin having a in accordance with ISO 20965 (as at 15 Feb. 2005, measurement apparatus type A) of 10⁴ to 10⁷ Pa s measured at 190° C. within a range of Hencky strain rate of 0.01 s⁻¹ to 1 s⁻¹ at a Hencky strain of 3.0. The invention further relates to a polymer composition for the foam layer for performance of the process and to a multilayer polymer film produced by the process and to the use thereof.

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First Claim