| 摘要 |
PURPOSE:To save energy required for manufacture of a crush pad as well as obtain the thick crush pad product having uniform thickness by a method in which a surface skin obtained from blow molding of soft PVC resin composition is incorporated with aggregate and integrated by injection and expansion of an expandible urethane resin. CONSTITUTION:A soft PVC resin composition based on a vinyl chloride resin having an average polymerization degree of 1,400 or more or the average polymerization degree of 400 or more of meltable portion containing 5% or more unmelted portion after dipped in tetrahydrofuran of 120 deg.C for one hour is molded into the surface skin of a crush pad by a blow molding method. The surface skin is incorporated with a rigid aggregate, and an expandible urethane resin is injected between the surface skin and the agregate and expanded to integrate them. An aimed product is thus obtained. EFFECT:The surface of the molding can be embossed by blow molding, the molding can be freely designed, and the loss of the material can be lessened. |
