| 摘要 |
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 |
