| 摘要 |
<p>In order to obtain the best compromise between cost and strength according to use, the sheet (1) comprises two outer layers (3), which are made from unused homopolymer or copolymer polypropylene, or from mixtures of both, containing up to a maximum of 40% inorganic filler, and an inner layer (2), which is preferably made from recycled and/or new homopolymer or copolymer polypropylene, or from mixtures of both, containing 10 to 60% inorganic filler. As an alternative, the central layer can contain a mixture of organic and inorganic filler, in which the organic filler constitutes less than 40%.</p> |
