| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyoxymethylene resin material for cutting, extremely improved so that a molded product therefrom scarcely generates a white spot in the central area of its cross-section when subjected to extrusion molding, while keeping various excellent characteristics inherent in the polyoxymethylene resin. SOLUTION: This polyoxymethylene resin material for cutting comprises a polyoxymethylene copolymer which is so structured that specified oxyalkylene units are introduced into oxymethylene units (-CH2 O-) in an amount of 1.7-20 mol based on 100 mol of the oxymethylene unit and has an isothermal crystallization time of >=200 sec at 150 deg.C.
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