| 摘要 |
<p>The present invention solves the problems found in the prior art by means of a co-extruded film comprising at least three layers, and characterised in that the inner layer (A) made of polyethylene or polypropylene accounts for 50-80% of the thickness thereof, the outer layers (B) made of a mixture of at least two styrene-butadiene block copolymers account for 10-25% of the thickness thereof, and in that the mixture of block copolymers comprises 5-20% elastomeric thermoplastic block copolymer and 80-95% thermoplastic block copolymer. These films can be used for wrapping candy, and when they are monoaxially oriented they can be used as heat-shrinkable packaging.</p> |
