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1. (WO2017157410) MULTILAYER SEALING FILM, AND FILM LAMINATE WITH MULTILAYER SEALING FILM

Pub. No.:    WO/2017/157410    International Application No.:    PCT/EP2016/055406
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Tue Mar 15 00:59:59 CET 2016
IPC: B32B 27/32
B32B 3/30
C08J 5/18
Applicants: CONSTANTIA HUECK FOLIEN GMBH & CO. KG
Inventors: GREFENSTEIN, Achim
GEITNER, Werner
GEILLERSDÖRFER, Ingo
Title: MULTILAYER SEALING FILM, AND FILM LAMINATE WITH MULTILAYER SEALING FILM
Abstract:
The aim of the invention is to improve the sealing properties and the sliding properties of a sealing film (10). This is achieved in that surface structures (14) are provided on a first face (15) of the sealing film (10). The largest thickness (h2) of the sealing film (10) is at least 10% larger than the smallest thickness (h1) of the sealing film (10), and the longest lateral extension (b1, b2) of the surface structures (14) is less than 500 μm. A slip additive is added to the sealing film (10) in a maximum quantity which results in an S-value of less than 10,000, preferably less than 5,000, such that the face with the surface structures (14) achieves a COF of less than 0.3, preferably less than 0.27, dynamically and less than 0.35, preferably less than 0.3, statically compared to steel regardless of the addition of an anti-block additive to the sealing film (10).