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[Chemical Knowledge]：Manufacturing method and process of viscose filament

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The manufacturing method
of viscose filament
1. Introduction

viscose filament is an important chemical production raw material, widely used in textiles, clothing, non-woven fabrics and other fields. With the continuous development of science and technology, the manufacturing method of viscose filament has been continuously improved and optimized. This article will introduce a common viscose filament manufacturing method.

2. raw material preparation

viscose filament manufacturing needs to prepare the following raw materials: pulp, caustic soda, carbon disulfide, sulfuric acid, zinc salt, etc. Among them, pulp is the main raw material, the general use of wood pulp, cotton linter pulp and so on.

3. viscose preparation

1. alkali cellulose preparation: pulp mixed with caustic soda solution, impregnated at a certain temperature, make it become alkali cellulose.
2. Yellowing: The alkali cellulose and carbon disulfide are mixed, and the yellowing reaction is carried out at a certain temperature to generate cellulose xanthate.
3. Dissolution: The cellulose xanthate is mixed with dilute sulfuric acid to dissolve into a viscose solution.

4. viscose filament spinning

1. filtration: viscose solution is filtered to remove impurities.
2. defoaming: vacuum defoaming the viscose solution to reduce the bubbles in the solution.
3. Spinning: The viscose solution is sprayed through a spinneret to form filaments.
4. Coagulation: The filaments are immersed in a coagulation bath to coagulate into fibers.
5. Drafting: The coagulated fiber is drawn to increase its length and fineness.
6. Water washing: The fiber after drawing is washed with water to remove the residue on the surface.
7. Drying: The water-washed fibers were dried to obtain viscose filaments.

5. quality control

In the manufacturing process of viscose filament, it is necessary to strictly control the quality of each link to ensure that the quality of the final product meets the requirements. It is necessary to monitor and adjust the quality of raw materials, the viscosity of viscose, the temperature in the spinning process, the draft ratio and other parameters.

6. environmental protection and sustainable development

viscose filament manufacturing process will produce a certain amount of waste gas and wastewater, the need for effective treatment and recycling, in order to reduce the impact on the environment. At the same time, we also need to pay attention to the sustainable utilization of resources and the reduction and utilization of waste, so as to promote the green development of viscose filament manufacturing.

7. conclusion The manufacturing method of

viscose filament involves the control of multiple links and process parameters, and requires strict quality control and environmental protection measures. With the continuous progress and application of science and technology, the manufacturing method of viscose filament will be continuously optimized and improved to improve production efficiency and quality level, and at the same time, it can better meet the requirements of environmental protection and sustainable development.

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