MULTILAYER PRE-STRETCHED ELASTIC ARTICLES Russian patent published in 2011 - IPC B32B5/04 B32B27/02 B29C55/02 B32B7/12 B32B27/32 D01F8/04 

FIELD: process engineering.

SUBSTANCE: invention relates to pre-stretched multilayer films, fixers, webs, etc. Proposed article comprises at least two layers, one low-crystalline and one high-crystalline layers. Low-crystalline layer comprises low-crystalline olefin (co)polymer while high-crystalline layer comprises high-crystalline olefin (co)polymer with melting point below that of low-crystalline olefin (co)polymer. Difference between crystallinity of both (co)polymers makes at least 1 wt%. Article allows elongation at temperature below low-crystalline polymer melting point in at least one direction to elongation degree making at least 50% of its initial length or width. Preferably, high-crystalline layer should be subjected to plastic deformation after elongation.

EFFECT: pre-stretched multilayer articles.

49 cl, 4 dwg, 3 tbl