| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition low in extractability to hot water, excellent in resistance to radiation, and good in high-speed moldability and transparency, and useful for disposal syringe products, etc., by incorporating a resin blend with specific compounds followed by pressure reduction to control the melt flow rate of the resultant composition. SOLUTION: This resin composition is obtained by incorporating (A) 100 pts.wt. of a resin blend 2.3-3.5wt.% in ethylene content composed of (i) a propylene homopolymer 0.5-15g/10min in melt flow rate (hereafter, abbreviated as MFR) or a propylene-ethylene random copolymer <=1wt.% in ethylene content and (ii) a propylene-ethylene random copolymer 0.5-15g/10min in MFR and 2.5-5.0wt.% in ethylene content with (B) 0.01-5 pts.wt. of either one kind of organic alkali metal salt among alkali metal carboxylates, alkali metalβ- diketonates and alkali metalβ-ketoacetic ester salts and (C) 0.01-5 pts.wt. of a cyclic organophosphoric ester basic polyvalent metal salt of the formula, followed by subjecting the resultant composition to reduced pressures to control the MFR thereof within the range of 25 to 100g/10min.
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