| 摘要 |
The invention is a process for making a multi-layered self-adhesive, protective film consisting of a base layer made with a homopolymer or a copolymer of a polyolefin of type C2 or C3; a pressure sensitive adhesive layer of a copolymer of ethylene and vinyl acetate, in which the content of vinyl acetate is between 45% and 90%; and a tie layer which unites the other two layers into a multi-layer, auto-adhesive protective film. The tie layer is formed by a polyolefin or a copolymer made from ethylene and vinyl acetate in which the content of vinyl acetate is between 10% and 40%. This tie layer serves the function of preventing the transfer of the pressure sensitive adhesive to the surface which is to be protected even under critical conditions such as temperatures of 80° centigrade or exposure to UV rays.
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