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Method for making acrylic fibre by fine denier dry method and spinning nozzle

A technology of dry-process acrylic fibers and production methods, which is applied in the directions of dry-spinning, spinneret assemblies, fiber chemical characteristics, etc., can solve the problems that the quality and price cannot compete with foreign products, and achieve good spinnability and improved hand feeling , Good spinning position stability

Inactive Publication Date: 2006-03-29
浙江金甬腈纶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among all kinds of fiber materials, especially fine denier acrylic fiber has soft hand feeling, high strength, soft luster, and twice the hygroscopicity of ordinary acrylic fiber. Its elongation, wool-like property and bright color are superior to other fibers, and it is most suitable for high-end fashion products such as silk imitation, and as raw materials for high-count yarns to make knitted fabrics and woven fabrics. It is still limited to the wet process and cannot compete with foreign products in terms of quality and price, so most of the raw materials used in China still rely on imports

Method used

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  • Method for making acrylic fibre by fine denier dry method and spinning nozzle
  • Method for making acrylic fibre by fine denier dry method and spinning nozzle
  • Method for making acrylic fibre by fine denier dry method and spinning nozzle

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Embodiment Construction

[0016] Be the dry-process acrylic fiber of 1.00dtex to be embodiment with production fineness, comprise the following steps:

[0017] a), Spinning and forming: use polyacrylonitrile dry powder (PAN) as raw material, use dimethylformamide (DMF) as solvent, prepare a polymer stock solution with a concentration of 33 ± 1%, and heat it from the spray Single filaments are extruded from the high-density holes on the wire board. The inner temperature of the heater is controlled at 135±1°C, the outer temperature is controlled at 123±1°C, and the tunnel temperature is 330±10°C from top to bottom. Body temperature is 240±10°C, upper tunnel temperature is 210±10°C, upper tunnel lower temperature is 180±10°C, nitrogen temperature is 370±10°C, nitrogen pressure is 3-4kpa, tunnel productivity is 42±1kg / h, and spray the tow with a cold DMF-containing dilute solvent at the spraying place to obtain primary fibers.

[0018] b) Washing with water and drawing: control the temperature of the pro...

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Abstract

The present invention optimizes and properly regulates the technological conditions of original Dupont dry spinning of acrylic fibre, such as properly raising temperature difference of internal and external side temperatures of mass, reasonably controlling nitrogen gas temperature and flow rate, water-washing temperature and draft multiple and speed and using cotton type oil agent to oil, etc. and reasonably designs the spinneret with high-density nozzle hole, its hole number is 3600-4400, its aperture is 0.09-0.13 mm, and the holes are arranged and distributed on 15-21 concentric circles, so that it can implement industrial production of fine-denier dry acrylic fibre.

Description

technical field [0001] The invention relates to a method for making dry-process acrylic fiber and special equipment used therefor, in particular to a method for making fine-denier dry-process acrylic fiber with a denier of 0.6-1.32 dtex and a spinneret. Background technique [0002] With the improvement of living standards, people are increasingly pursuing the fashion sense of clothing, adapting to the new trend of world clothing development and wearing comfort and softness. Among all kinds of fiber materials, especially fine denier acrylic fiber has soft hand feeling, high strength, soft luster, and twice the hygroscopicity of ordinary acrylic fiber. Its elongation, wool-like property and bright color are superior to other fibers, and it is most suitable for high-end fashion products such as silk imitation, and as raw materials for high-count yarns to make knitted fabrics and woven fabrics. It is still limited to the wet process, and cannot compete with foreign products in...

Claims

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Application Information

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IPC IPC(8): D01D5/04D01D4/02D01F6/18
Inventor 姚家华张宇飞马洪波丁国伟孙涛黄志强
Owner 浙江金甬腈纶有限公司
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