| 摘要 |
PURPOSE:To make it possible to improve remarkably the cohesive force at the boundary of contact between a primary molding part and a secondary molding pat, by using a specified mixed polyamide resin as at least ether of the primary and secondary parts of a two-stage molded polyamide resin. CONSTITUTION:This two-stage molded polyamide resin is composed of primary and secondary molding parts of a polyamide resin. As the polyamide resin for a primary and/or secondary molding parts, a composition formed by mixing 100pts.wt. polyamide 12 resin with 10-235pts.wt. polyamide 12/6 copolymer is used. As the polyamide 12/6 copolymer, one comprising 100pts.wt. polyamide 12 component and 10-40pts.wt. polyamide 6 component is desirable. It is particularly desirable in respect of adhesion that said polyamide resin mixture is used as the primary molding part and a polyamide 12 resin is used as the secondary molding part. Examples of said two-stage molding include soles of shoes. |
