FILMS MADE FROM HETEROGENEOUS ETHYLENE/ALPHA-OLEFIN COPOLYMER Russian patent published in 2014 - IPC B32B27/00 C08F10/02 C08F110/02 C08F210/02

Abstract RU 2519776 C2

FIELD: chemistry.

SUBSTANCE: invention relates to a multilayer film for making a finished article and a finished article having said film. The multilayer film includes at least two layers. The first layer includes a first a copolymer of ethylene and at least one alpha-olefin. The first copolymer has density of less than 0.925 g/cm³, and average viscosity molecular weight M_v and a valley temperature between the copolymer and high crystalline fraction, T_hc, such that the M_v for a fraction above T_hc from ATREF divided by M_v of the whole polymer from ATREF (M_hc/M_hp) is less than 1.95. The copolymer has composition distribution breadth index (CDBI) of less than 60%. One other second layer includes a second a copolymer of ethylene and at least one alpha-olefin. The second copolymer has density of 0.925-0.965 g/cm³.

EFFECT: obtaining a film with improved optical properties, hardness, puncture resistance, tear resistance and manufacturability.

15 cl, 3 tbl, 1 dwg, 1 tbl

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RU 2 519 776 C2

Authors

Jun' Sjaobin

Vastiani Risdianti

Gokh Khvi Lun

U Chan

Demirors Mekhmet

Dates

2014-06-20—Published

2009-12-16—Filed