| 摘要 |
<p>The invention concerns a production of foamed thermoplastics materials in which the thermoplastics material to be foamed is mixed with a solvent. The resultant gel is compressed to form a pre-form or precursor which is heated. The use of polyethersulphone (P.E.S.), with acetone and/or butanone is described. In addition to the description of methods of producing foamed thermoplastics materials a description is also made of methods of forming composite, laminated, structures using foamed thermoplastics materials with other laminae.</p> |
