| 摘要 |
<p>A foamable thermoplastic sheet-like synthetic resin makes it possible to obtain a thermoplastic foamed product which allows a pseudoplasticity as an unidirectional foaming in a direction of thickness, reduces variance of accuracy in thickness and weight, has high compression strength and is excellent in quality such as surface flatness, and also provides a production method of such sheet-like and foamed products. A thermoplastic foamed resin is characterized by a foamable thermoplastic sheet-like resin product (1) including foamable thermoplastic resin granules (2) which are disposed substantially uniformly and are interconnected integrally through a foamable thermoplastic resin thin film (3), a continuous foamed layer made of a thermoplastic resin, a plurality of high foamed portions made of a thermoplastic resin and disposed on at least one of the surfaces of the continuous foamed layer, and a low foamed thin film made of a thermoplastic resin and covering the outer surface of the high foamed portion.</p> |
