聚甲醛树脂组合物、聚甲醛纤维母粒及其制备方法和聚甲醛纤维

本发明提供了一种聚甲醛树脂组合物、聚甲醛纤维母粒及其制备方法和聚甲醛纤维。按质量份数计，本申请提供的聚甲醛树脂组合物包括聚甲醛树脂100份，结晶抑制剂0.02～2份以及任选的助剂0.01～5.0份，其中，结晶抑制剂为环氧乙烷-环氧丙烷共聚物，且其数均分子量为600～3000g/mol，分子量分布指数为2.8～4.2。本申请提供的聚甲醛树脂组合物通过结晶抑制剂与聚甲醛树脂相互协同，能够有效降低聚甲醛熔体的结晶度，延长聚甲醛熔体的半结晶时间，改善聚甲醛树脂的纺丝性能，使其充分拉伸取向，得到高强度和高模量的特种聚甲醛纤维。 The invention provides a polyformaldehyde resin composition, a polyformaldehyde fiber master batch, a preparation method of the polyformaldehyde fiber master batch and a polyformaldehyde fiber. The polyformaldehyde resin composition provided by the invention comprises the following components in parts by mass: 100 parts of polyformaldehyde resin, 0.02-2 parts of a crystallization inhibitor and 0.01-5.0 parts of an optional auxiliary agent, the crystallization inhibitor is an ethylene oxide-propylene oxide copolymer, the number-average molecular weight of the crystallization inhibitor is 600-3000g/mol, and the molecular weight distribution index of the crystallization inhibitor is 2.8-4.2. According to the polyformaldehyde resin composition provided by