| 摘要 |
<p>A method for the preparation of incombustible composite materials having high inter-layer adhesive strength and small permanent compression distortion, the method comprising interposing between a layer of a polyvinyl chloride sheet and a layer of hardboard sheet an intermediate layer of a soft foam. The intermediate layer is prepared by covering a soft foam sheet with a latex of vinylidene chloride-based copolymer. The vinylidene chloride-based copolymer is obtained by copolymerization of 65 - 95 parts by weight of vinylidene chloride monomer, 5 - 35 parts by weight of a vinyl monomer not containing any unsubstituted corboxyl group and 1 - 10 parts by weight of a vinyl monomer containing at least one unsubstituted carboxyl group. The respective layers are bonded together by high frequency welding.</p> |
