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Raw material processing method for producing 80 DEG C water soluble fibers

A water-soluble fiber and treatment method technology, applied in fiber treatment, filament forming treatment, textile and papermaking, etc., can solve the problems of high water-soluble temperature and unsatisfactory application effect, and achieve low dissolution temperature, shortened residence time, and technological process. short effect

Inactive Publication Date: 2013-04-24
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fiber produced by using PVA 17-99F has a dissolution temperature of about 90°C, and its water dissolution temperature is too high, so the application effect in the fields of textile and non-woven soluble embroidery base cloth, water-soluble paper, and textile companion spinning is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A processing method for raw materials for producing water-soluble fibers at 80°C. It uses polyvinyl alcohol 1099F particles with a degree of polymerization of 950 and a degree of alcoholysis of 99.3%, and the particle size is 1-3mm; the specific process is: Under blowing, the polyvinyl alcohol particles with a particle size of 1-3mm are separated by a classifier, dipped and soaked in an immersion tank at a temperature of 29°C for 15 minutes, and then dehydrated by a dehydrator with a speed of 1800 rpm. The water-washed polyvinyl alcohol 1099F with a sodium acetate content of 0.29% and a moisture content of 40% was obtained.

Embodiment 2

[0018] A processing method for raw materials for producing 80°C water-soluble fiber, which uses polyvinyl alcohol 1099F particles with a degree of polymerization of 1050 and a degree of alcoholysis of 99.8%, and the particle size is 6-8mm; the specific process is: in the feeding fan Under the blowing, the polyvinyl alcohol particles with a particle size of 6-8 mm are separated by a classifier, dipped and soaked in an immersion tank at a temperature of 34 ° C for 18 minutes, and then dehydrated by a dehydrator with a rotating speed of 1800 rpm. The sodium acetate content is 0.25%, and the water-washed polyvinyl alcohol 1099F with a water content of 35% is obtained.

Embodiment 3

[0020] A raw material processing method for producing 80°C water-soluble fiber, which uses polyvinyl alcohol 1099F particles with a degree of polymerization of 1000 and a degree of alcoholysis of 99.5%, and the particle size is 3-6mm; the specific process is: in the feeding fan Under the blowing, the polyvinyl alcohol particles with a particle size of 3-6 mm are obtained through classifier separation, dipped and soaked in an immersion tank at a temperature of 25 ° C for 20 minutes, and then dehydrated by a dehydrator with a rotating speed of 1800 rpm. The obtained sodium acetate content is 0.20%, and the water-washed polyvinyl alcohol 1099F of moisture content is 44%.

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Abstract

The invention relates to a raw material processing method for producing 80 DEG C water soluble fibers. The raw materials for producing the 80 DEG C water soluble fibers is adopted with polyvinyl alcohol particles with polymerization degree of 950-1050 and alcoholysis degree of 99.3-99.8 percent. Particle diameter of the particles is 1-8 mm. The raw material processing method for producing 80 DEG C water soluble fibers is capable of enabling the produced polyvinyl alcohol particles to be low in molecular weight and solution temperature, small in melt loss, good in stability, enabling solution concentration to be prone to being controlled during the process of solution, and being particularly suitable for preparation of the 80 DEG C water soluble fibers of low solution temperature.

Description

technical field [0001] The invention relates to the processing of polyvinyl alcohol fiber raw materials, in particular to a method for processing raw materials for producing 80°C water-soluble fibers. Background technique [0002] The conventional product of polyvinyl alcohol (PVA) fiber is polyvinyl formal fiber, which is called vinylon for short in China. In the raw material PVA used in vinylon production, low molecular weight products and sodium acetate with a content of about 1.2% will affect the spinning effect during the spinning process. If the content of sodium acetate is required to be less than 0.25%, otherwise it will make the fiber Alkaline coloring occurs upon heat treatment. Therefore, the raw material PVA must be washed with water before fiber spinning. By washing with water, the content of sodium acetate and water-soluble small molecules in the raw material PVA will be reduced; and a part of the PVA with a relatively low molecular weight in the material can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/00
Inventor 秦庆伟张仁文余俊杨坤
Owner CHINA PETROCHEMICAL CORP
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