POLYMER FILMS Russian patent published in 2013 - IPC C08J5/18 C08F4/649 C08F4/64 C08F10/00 C08F2/34 

FIELD: chemistry.

SUBSTANCE: film is made by extrusion from an ethylene and alpha-olefin compolymer. Said ethylene and alpha-olefin copolymer is obtained during a gas-phase polymerisation process with formation of particles in the presence of a monocyclopentadienyl metallocene complex, a co-catalyst of general formula (L*-H)⁺ _d(A^d-), where L* is a neutral Lewis base, (L*-H)⁺ _d is a Brоnsted acid, A^d- is a non-coordinating associative anion, having a charge d^- and the anion includes an aryl-substituted borate, and d is an integer ranging from 1 to 3, of carrier material and alpha-olefin. Polymer film contains less than 300-600 gels/m² with size from 100 to 2000 mcm according to the invention of an optical inspection system.

EFFECT: reduced amounts of gels causing defects in transparency of films.

16 cl, 2 ex, 3 tbl