| 摘要 |
[Problem] To provide a technology whereby a hardly colored molded article for medical use can be manufactured at a low cost. [Solution] A molded article for medical use that is manufactured by extrusion molding a composition, said composition comprising, per 100 parts by mass of a polyvinyl chloride resin, 30-160 parts by mass of an ester plasticizer, 5-25 parts by mass of an epoxy plasticizer, and 0.01-0.1 part by mass (in total) of a zinc soap and calcium soap, wherein the white index (W.I.) of the molded article for medical use is 25 or more and the yellow index (Y.I.) thereof is 3.5 or less. In the extrusion molding of the molded article for medical use, a composition 11 in a solid state is supplied to a screw 21 of an extruder 20, said extruder being provided with grooves 22 having the same depth d, at a rate that is regulated so as to prevent shear heat generation in the composition within the extruder. Next, the solid composition supplied to the screw is heat-melted by heaters 41, 42 and 43 and the melted composition extruded from the extruder is molded into the shape of the molded article 12 for medical use in a die 50. |
