Method for producing special fibers of large bright sewing thread from polyester bottle waste material

Abstract

The present invention relates to a method for producing special fibers of large bright sewing thread from a polyester bottle waste material. The method of the present invention is the improvement of the chopped fiber regeneration process in the prior art. The method comprises: carrying out a vacuum drum drying treatment, wherein the water content in the material is less than 80 ppm; adding additives of an OB-1 brightening agent, barium sulfate and zinc stearate to the material according to a certain ratio, wherein per ton of the material is added with 25-50 g of the OB-1 brightening agent, 500-2000 g of the barium sulfate, and 50-200 g of the zinc stearate; uniformly mixing the material and the additives, and carrying out melting extruding with a screw extruder. According to the method, fiber whiteness can be increased with the OB-1 brightening agent; a slipping coefficient of crushed sheets can be increased with the zinc stearate, such that uniform material feeding of the screw extruder can be ensured so as to reduce reflux degradation of the melt, and uniform material conveying in the dry bin can be provided so as to reduce moisture regaining due to long time staying; the spinning performance and the drafting performance can be improved with the barium sulfate; and the additives are added to the material, and the production process is appropriately adjusted, such that the produced product can meet requirements of the special fibers of the large bright sewing thread.

Description

technical field [0001] The invention relates to a method for producing special fiber for bright sewing thread from polyester bottle waste, in particular to a method for producing special fiber for 1.33dtex bright sewing thread from polyester bottle waste. Background technique [0002] Currently, waste polyester (PET) bottle crushed flakes are used to produce recycled polyester staple fiber, which is used in the textile field. The most high-end products are limited to 1.56dtex*38mm high-strength and low-stretch cotton imitation Dahua products, and special staple fibers for Dayouguang sewing thread are also available. There is no report, and this content is not included in the national industry standard. Contents of the invention [0003] The purpose of the present invention is to provide a kind of 1.33dtex*38mm high-strength low-strength fiber that can be produced from polyester bottle waste to solve the technical problem that the existing use of polyester bottle waste is l...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of 1.33dtex*38mm high-strength low-strength fiber that can be produced from polyester bottle waste to solve the technical problem that the existing use of polyester bottle waste is limited to the production of some low-end common products and cannot produce ultra-fine denier special fibers. The method of stretching the special fiber of large glossy sewing thread