METHOD FOR FUSING HOLLOW MOLDED PRODUCT

摘要

PROBLEM TO BE SOLVED: To provide a method for enhancing the fusion strength of a hollow molded product in a method for obtaining the hollow molded product comprising a thermoplastic resin compsn. by using a die slide injection method or a die rotary injection method. SOLUTION: In a method for obtaining the hollow molded product comprising a thermoplastic resin compsn. by using a die slide injection method or a die rotary injection method, the ratio of the cross-sectional areas of a bonded part and a fused part is 2.5-500. The average thickness A of the bonded part is 5 times or less the average wall thickness of a primary molded product and the average width C of the bonded part is 5 times or less the average wall thickness of the primary molded product.