Release film

Abstract

Abstract PURPOSE:To improve the adherence between and durability of a polyester film and a silicone release layer by a structure wherein a primer layer consisting of crosslinked silane coupling agent and the silicone release layer are provided in the order named on at least one side of the polyester film. CONSTITUTION:As the polyester concerned, polyethylene terephthalate, polypropylene terephthalate and the like are preferably exampled. the preferable thickness of the polyester film is 12-250mum. As the silane coupling agent applied on at least one side of the polyester film, compounds represented by a general formula YRSiX3 such as vinyltriethoxysilane and the like are exampled. The preferable method for providing the silane coupling agent on the polyester film is to apply spreading liquid and, after that, crosslink is carried out. The concentration of solid content of the spreading liquid is normally 30wt.% or less. The amount of coating of the liquid is set to be 0.5-20g per 1m<2> of running film.

Inventors

• 👤 Teruo Takahashi
• 👤 Sadami Miura

Bibliographic Details