| 摘要 |
<p>Packaging container with composite plastic walls comprising at least two layers, the outer layer (A) being formed from a thermoplastic elastomer chosen from (i) copolymers of propylene and ethylene having a Shore D hardness of less than or equal to 40 (measured according to ISO 868), (ii) mixts. of propylene homopolymer and an ethylene-propylene-diene terpolymer, (iii) elastomeric polyethylene terephthalates, (iv) elastomeric polyurethanes, (v) ethylene-vinyl acetate copolymers and (vi) sequenced polyether-polyamides, and the interior layer (B) being formed from a polyolefin which is non-elastomeric and which is impermeable to oxygen, both polymers (A) and (B) having a mol. wt. that renders them suitable for processing by coextrusion-blowing.</p> |
