| 摘要 |
A multi-layer heat-shrinkable film, which is useful in the manufacture of ba gs with a good balance of mechanical, optical and shrink properties and sealability, comprises an outer heat-sealing layer (a) of a heat-sealable polyolefin, an outer abuse layer (b) comprising a polyamide with a melting temperature >= 175~C, preferably blended with an ethylene-vinyl alcohol copolymer, and an intermediate gas barrier layer comprising PVDC. The film i n the form of a seamless tube wherein the heat-sealing layer (a) is the innermost layer of the tube and the containers, such as bags and pouches, obtained from the film by heat-sealing the heat-sealing layer (a) to itself are also claimed. The bags thus obtained can suitably be heat-sealed also wh en overlapped.
|
