Method for reusing polyester chip

本发明涉及一种回收利用聚酯切片的方法，它包括提供聚酯切片(a)、多元醇(b)和多元酸(c)，使(a)和(b)进行酯交换反应，再使其与(c)反应，产生再生聚酯树脂，用于制备所述再生聚酯树脂的原料中羟基的总摩尔数不少于羧基总摩尔数的1.03倍。本发明还涉及另一种回收利用聚酯切片的方法，它包括提供所述的(a)、(b)和(c)，使(a)和(c)进行酯交换反应，再使其与(b)反应，产生再生聚酯树脂，用于制备所述再生聚酯树脂的原料中羟基的总摩尔数不少于羧基总摩尔数的1.03倍。 This invention relates to a method for recycling a polyester chip which comprises providing a polyester chip (a), polyol (b) and polybasic acid (c), subjecting said (a) and said (b) to transesterification reaction and reacting it with said (c) to give a reconstituted polyester resin, the total number of moles of hydroxyl group being not less than 1.03 times the total number of moles of carboxyl group in the material for the production of said reconstituted polyester resin; and a method for recycling a polyester chip which comprises providing said (a), (b) and (c) and, with the total of (a), (b) and (c), subjecting said (a) and said (c) to transesterification reaction and reacting it with said (b) to give a reconstituted polyester resin, the total number of moles of hydroxyl group being not less than 1.03 times the total number of moles of carboxyl group in the material for the production of said reconstituted polyester resin.