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

A technology of dry-process acrylic fiber and its production method, which is applied in the directions of dry-spinning method, fiber chemical characteristics, spinneret assembly, etc., can solve the problems such as the inability to compete with foreign products in terms of quality and price, and achieve good spinnability and hydrophobicity. Good, good spinning position stability

Inactive Publication Date: 2008-06-04
浙江金甬腈纶有限公司
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  • Abstract
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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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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Be the dry-process acrylic fiber of 1.00dtex to be embodiment with production fineness, comprise the following steps:

[0013] a), Spinning forming: use polyacrylonitrile dry powder as raw material, and use dimethylformamide as solvent to prepare a polymer stock solution with a concentration of 33±1%. Extrude into the hole to form a monofilament, the inner temperature of the heater is controlled at 135±1°C, the outer temperature is controlled at 123±1°C, the tunnel temperature is from top to bottom, the mirror box temperature is 330±10°C, and the cone temperature is 240±10°C ℃, the temperature of the upper part of the upper tunnel is 210±10℃, the temperature of the lower part of the upper tunnel is 180±10℃, the nitrogen temperature is 370±10℃, the nitrogen pressure is 3~4kpa, the productivity of the tunnel is 42±1kg / h, and the The tow is sprayed with a cold dilute solvent containing dimethylformamide to obtain primary fibers.

[0014] b) Washing with water and drawing:...

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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 producing dry-process acrylic fibers, in particular to a method for producing fine-denier dry-process acrylic fibers with a denier of 0.6-1.32 dtex. 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 terms of quality and price, so most of the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
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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