A process for producing a polyester composition comprising polyester and a metal salt of aliphatic carboxylic acid, comprises:
providing a vented extruder; and
feeding said metal salt together with said polyester as a raw material having a specific resistance of not less than 1 x 107 Ω·cm upon melting, to said vented extruder, in such an amount that the concentration of metal atom based on said polyester composition is 0.5 to 1,000 ppm.
Such a process is industrially useful for producing a polyester composition to which an electrostatic pinning method usually adopted for molding amorphous sheets can be suitably applied.
一种生产由聚酯和脂肪族
羧酸金属盐组成的聚酯组合物的工艺包括
提供一个通风挤压机;以及
将所述
金属盐和所述聚酯作为熔化后比电阻不小于 1 x 107 Ω-cm 的原料一起喂入所述通风挤压机,喂入量使
金属原子在所述聚酯组合物中的浓度为 0.5 至 1,000 ppm。
这种工艺在工业上可用于生产一种聚酯组合物,对这种组合物可适当采用通常用于模塑无定形片材的静电销钉法。