| 摘要 |
<p>PURPOSE: To obtain improved stability and a barrier effect against diffusion of chemicals and the like by producing a composite material comprising a layer of a molded material based on polyamide and a layer of a molded material based on a particular mixture. CONSTITUTION: At least 50% of the all end groups existing in polyamide are amino end groups, and the concentration of the amino end groups is within the range of 30-130 mM/kg. The thermoplastic multilayer composite material is obtained by comprising at least one layer of a molded material based on polyamide, and at least one layer of a molded material based on a mixture consisting of linear crystalline polyester of 95-60 weight % and a polymer of 5-40 weight % with reactive groups other than those having epoxy groups (the reactive groups derivable from the polymer have a concentration of 4-95 mM/kg). In this case, the 2 layers are bonded with each other as being friction- connected. This multi-layer composite material has improved stability and a barrier effect against diffusion of chemicals and the like.</p> |
