POLYMER FILM CONTAINING RANDOM COPOLYMER OF PROPYLENE Russian patent published in 2008 - IPC C08J5/18 C08F10/06 C08L23/14 

FIELD: chemistry.

SUBSTANCE: group of inventions refers to polymer film containing random copolymer of propylene with ethylene or α-olefin and used mainly for the packages. In the first version this invention concerns polymer film made of the composition containing random copolymer of polyethylene with comonomer which is ethylene or α-olefin, having at least four carbon atoms at total comonomer content within 4.5 to 12 mole%, and the film has relative reduction of random friction (intra-intra) within period from one to four days by 35% or more, however it is preferable by 40% or more. The second version concerns polymer film made of the composition containing random copolymer of propylene with comonomer which is ethylene or α-olefin, having at least four carbon atoms at total comonomer content within 4.5 to 12 mass %, and comonomer distribution in random copolymer, defined by TREF method, is multimodal, preferably bimodal, and if necessary, the composition contains common additives. Some versions of polymer film are presented in addition. Good optical, sealing and sliding properties, as well as high softness of film and low content of soluble xylenes are provided.

EFFECT: provided good optical, sealing and sliding properties, as well as high softness of film and low content of soluble xylenes.

22 cl, 5 ex, 3 tbl, 5 dwg