Method for preparing acrylic fibre with wet-process

Abstract

A preparation method for wet acrylic fiber is characterized by including the following steps in turn: a, spinning and shaping; b, washing and drafting; c, oiling; d, drying; e, winding; f, shaping. Furthermore, compared with the prior art, the invention makes improvement on the shaping technique and post treatment technique through the specific design of a silk spray plate and selects proper spinning, shaping and post treatment condition technique parameters through a plurality of tests to improve the coagulation bath circulation amount, improve the adding amount and the drafting times of an oil agent and improve the winding door pressure. The acrylic fiber manufactured by the invention improves the shaping effect of the fiber.

Description

technical field

[0001] The invention relates to a preparation method of wet-process acrylic fiber. Background technique

[0002] Acrylic fiber is the trade name of polyacrylonitrile fiber in our country. Acrylic has excellent performance, soft and warm to the touch, and has good elasticity. Light fastness and weather resistance are particularly good. Generally made into short fibers. Available pure or blended with wool. It is used to make textiles, knitwear, blankets, tents, curtains and filter cloths, etc. Because its properties are close to wool, it is called "synthetic wool". Although acrylic fibers are usually called polyacrylonitrile fibers, acrylonitrile (customarily called the first monomer) only accounts for 90% to 94%, the second monomer accounts for 5% to 8%, and the third monomer is 0.3% to 2.0%. %. This is due to the lack of flexibility, brittleness and difficulty in dyeing fibers made from mono-acrylonitrile polymers. In order to overcome these shortcomin...

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