Polyamide resin as well as preparation method and application thereof

The invention provides polyamide resin as well as a preparation method and application thereof. The polyamide resin is polyhexamethylene adipamide prepared by taking hexamethylene diamine and adipic acid as starting raw materials; based on the polyamide resin, the polyamide resin also comprises more than 3wt% of a first functional monomer and 0.5-3wt% of a second functional monomer; when the polyamide resin is used for preparing polyamide fibers, the spinnability is good, the fiber strength is high, the polyamide resin is suitable for producing fibers with the single fiber fineness being 0.5 dpf or below, and when the spinning speed is 4000 m/min or above, the production working condition is stable, and the product performance is excellent; the polyamide resin is suitable for preparing polyamide fibers. 本发明提供了一种聚酰胺树脂及其制备方法与应用，所述聚酰胺树脂以己二胺和己二酸为起始原料所制备得到的聚己二酰己二胺；以聚酰胺树脂为基准，所述聚酰胺树脂还包括3wt％以上的第一功能单体以及0.5-3wt％的第二功能单体；本发明所得聚酰胺树脂用于制备聚酰胺纤维时，可纺性良好，且纤维强度较高，适用于生产单纤细度在0.5dpf以下的纤维，在纺丝速度4000m/min以上时，生产工况稳定，产品性能优异；本发明所得聚酰胺树脂适用