| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pulverizing and classifying method capable of stable production. SOLUTION: In a pulverizing and classifying method in which a raw material consisting of at least one kind of a thermoplastic resin or a raw material containing at least one kind of a thermoplastic resin is pulverized by dispersing it in a flow of gas to collide each other and the gas in which the pulverized matter is dispersed is passed through the opening of a rotary member having an opening to sort the pulverized matter into the passable pulverized matter and the non-passable pulverized matter and the non-passable matter is joined with the raw material to be pulverized again by collision, the raw material contains a compound represented by the formula. In the formula, R<1> indicates a >=10C alkyl group or alkoxyl group, R<2> indicates -X-COOR<3> (X indicates an alkylene group and R<3> indicates a >=10C alkyl group) or a >=10C alkyl group.</p> |
