| 摘要 |
PROBLEM TO BE SOLVED: To enhance heat resistance, secondary processability and sealability by specifying the Vicat softening temp. and impact strength of a rigid vinyl chloride resin compsn. as well as the polymn. degree of the vinyl chloride resin of the compsn. and the content of the heat-resistance enhancing resin thereof and specifying the polymn. degree and hardness of a soft vinyl chloride resin separately extruded to be integrated with the rigid vinyl chloride resin compsn. SOLUTION: A heat resistance enhancing resin is added to 100 pts.wt. vinyl chloride resin with an average polymn. degree of 500-1,300 in a rigid vinyl chloride resin compsn. in an amt. of 10-50 pts.wt. and a chlorinated vinyl chloride resin, an ABS resin or the like are designated. The Vicat softening temp. of a molded product 1 of the rigid vinyl chloride resin is 95 deg.C or higher and the Charpy impact strength thereof is 15 kgf/cm<2> or more. The rigidity A prescribed by JIS K-6301 of a molded product comprising a soft vinyl chloride resin compsn. 2 is 60-90 and the average polymn. degree of the vinyl chloride resin used in the compsn. 2 is 2,000-4,000 and a plasticizer is added to the compsn. The rigid and soft vinyl chloride resin compsns. 1, 2 are extruded from individual extruders and both resins are allowed to meet with each other by one mold to be integrated. |
