| 摘要 |
<p>The invention relates to multi-layer composite materials which comprise the following components: (A) a foam layer, the foam being selected from polystyrene foams, polyurethane foams, polyester foams, butadiene-styrene block copolymer foams, sea sponges and aminoplast foams, (B) optionally at least one connecting layer and (C) a polyurethane layer.</p> |
