| abstract |
The present invention consists of a base layer (B) composed of at least 90% by weight or more of thermoplastic polyester, preferably polyethylene terephthalate (PET), at least one sealable outer layer and a second nonsealable outer layer and, if necessary, another intermediate layer. It further relates to a biaxially oriented coextruded polyester film containing at least one flame retardant, preferably an organophosphorus compound. The film of the present invention is characterized by low flammability, non-embrittlement upon thermal stress, and no problem of opacity in question, and is suitable for various applications indoors and outdoors. The outer layer contains an antiblocking agent such as silicic acid containing particles having a diameter of less than 50 nm and / or 2 μm or more. The sealable outer layer is preferably made of a copolymer ester made of ethylene terephthalate and etherene isophthalate units.n n n Transparent Sealing Flame Retardant Polyester Film |