| 摘要 |
FIELD: processes for producing films. ^ SUBSTANCE: film is produced by co-extrusion with blowing a) at least of one layer of thermoplastic fluoropolymer and at least of one layer of polymer A; b) or at least of one layer of thermoplastic fluoropolymer containing fillers and, possibly at least of one layer of other fluoropolymer; c) or at least of one layer of polymer A ( layers extruded at stages a, b or c are mutually stuck); d) of layer of one more thermoplastic polymer B for forming layer adjacent to combination of layers extruded at stages a, b or c. Thermoplastic polymer B is incompatible with fluoropolymer and with polymer A and it features strength of extrudate sufficient to be used as carrying layer for layers of fluoropolymer and(or) polymer A. After cooling, film containing at least one layer of polymer selected from thermoplastic fluoropolymers and polymers A is taken by separating it from layer or layers. ^ EFFECT: enhanced efficiency of method. ^ 15 cl, 2 tbl, 9 ex |
