METHOD FOR PRODUCING LOW-MELTING-POINT RECYCLED POLYESTER USED FOR SHEATH-CORE POLYESTER BY METHANOL DEGRADATION

摘要

A method for preparing low-melting-point recycled polyester used for sheath-core polyester. The low-melting-point recycled polyester is prepared by degradation and polycondensation of the following raw materials: a. recycled raw materials; b. methanol; c. one or more of zinc acetate, potassium acetate, manganese acetate, magnesium acetate, lead acetate, cobalt chloride, tetrabutyl titanate, tetraisopropyl titanate, and dibutyl dilaurate; d. one or more of isophthalic acid, adipic acid, and sebacic acid; e. one or more of neopentyl glycol, hexanediol, butanediol, and polyethylene glycol; f. catalyst antimonous oxide and cobalt acetate; and g. stabilizer trimethyl phosphate. The low-melting-point recycled polyester can be used for preparing sheath-core polyester staple fiber, and the prepared polyester staple fiber can be used for making nonwoven, flocking, and a compound material.