| 摘要 |
PURPOSE:To prevent mutual fusion of particles and fusion to a wall face and to smoothly heat and dry particles of polyester polymer by previously subjecting particles of polyester polymer to surface treatment with acetone and heating and drying. CONSTITUTION:Previously particles of polyester polymer are subjected to surface treatment with acetone and heated and dried. Direct immersion in acetone, contacting with an atmospheric gas of acetone, immersion in an aqueous solution of acetone, treatment with vapor of acetone may be cited as the surface treatment with acetone. |
