| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a vinyl chloride regenerated resin made of a raw material of vinyl chloride product having different melting temperature zones without increasing heating temperature and without prolonging heating time. SOLUTION: A first group of resin material piece mainly consisting of a hard vinyl chloride resin is introduced into a first cylinder 17 of a main injection portion 12 of an extruder 11, and a second group of resin material piece mainly consisting of a soft vinyl chloride resin is introduced into a second cylinder 32 of a sub-injection portion 13. After the material pieces introduced into each cylinder 17, 32 are kneaded and separately melted, the resulting materials are mixed and kneaded, and extruded from a die 16 as a vinyl chloride regenerating resin. |
