| 摘要 |
<p>The invention relates to heat shrinkage films having polyvinylidene chloride methyl acrylate blend as a barrier layer. Specifically, this invention relates to film structures having a first barrier layer comprising polyvinylidene chloride methyl acrylate blend wherein said barrier layer has two opposing surfaces; a second layer adhered to one of the surfaces of the first barrier layer comprising ethylene vinyl acetate copolymer blend; a third layer adhered to the other surface of the first barrier layer comprising an ethylene vinyl acetate copolymer blend; a fourth layer adhered to one of said second or said third layer comprising an ethylene acetate copolymer blend wherein the melt indexes of said blends of said second, third and fourth layers are the same; a fifth layer adhered to the other of said second or third layer comprising a blend of linear low density polyethylene and low density polyethylene. Said film structures have usefulness as shrink bags. Said film structure is oriented and may optionally be irradiated.</p> |
