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Production technology for high-wet modulus cotton pulp

A production process and high wet modulus technology, applied in pulp bleaching, textile and papermaking, fiber raw material processing, etc., can solve the problems of high raw material cost and limited procurement, and achieve low raw material cost, simple processing procedure and convenient operation Effect

Inactive Publication Date: 2012-10-24
TANGSHAN SANYOU GRP DONGGUANG PULP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high cost of existing modal fiber raw materials and limited purchase in the background technology, and provide a high wet modulus with low production cost and convenient purchase on the basis of meeting the quality requirements of modal fiber Cotton pulp production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Raw material preparation: After the cotton linters are loosened and impurity removed, the air is sent to the cyclone separator, and at the same time, the lye with a concentration of 38g / l is poured into it to fully mix it, and the alkali impregnation is completed, and then extruded by an extruder dehydration;

[0023] 2. Cooking: adopt the ball steaming alkali method to cook, send the impregnated slurry into the steaming ball for cooking, ensure that the amount of caustic soda accounts for 13.68% of the dry slurry, the bath ratio is 1:3.6, the heating time is 90 minutes, and the holding time is 130 minutes , the holding temperature is 168°C, the maximum steam release time is 40 minutes, and the pressure is 0Mpa;

[0024] 3. Chlorination: chlorinate the cooked slurry, add hydrochloric acid, liquid chlorine and caustic soda according to the metering, to ensure that the acid content before chlorination is 0.14g / l, the chlorine content after chlorination is 0.25g / l, and ...

Embodiment 2

[0029] 1. Material preparation: After the cotton linters are loosened and cleaned, the air is sent to the cyclone separator, and at the same time, the alkali solution with a concentration of 36g / l is poured into it and fully mixed with it to complete the alkali impregnation, and then extruded by an extruder After dehydration;

[0030] 2. Cooking: adopt the ball steaming alkali method to cook, send the impregnated slurry into the steaming ball for cooking, ensure that the amount of caustic soda accounts for 12.96% of the dry slurry, the bath ratio is 1:3.6, the heating time is 95 minutes, and the holding time is 110 minutes , the holding temperature is 165°C, the maximum steam release time is 60 minutes, and the pressure is 0Mpa;

[0031] 3. Chlorination: chlorinate the cooked slurry, add hydrochloric acid, liquid chlorine and caustic soda according to the metering, to ensure that the acid content before chlorination is 0.16g / l, the chlorine content after chlorination is 0.27g / ...

Embodiment 3

[0036] 1. Material preparation: After the cotton linters are loosened and cleaned, the air is sent to the cyclone separator, and at the same time, the alkali solution with a concentration of 36g / l is poured into it and fully mixed with it to complete the alkali impregnation, and then extruded by an extruder After dehydration;

[0037] 2. Cooking: use steaming ball alkaline cooking method, send the impregnated slurry into steaming ball for cooking, ensure that the amount of caustic soda accounts for 12.96% of the absolute dry slurry, the bath ratio is 1:3.6, the heating time is 90 minutes, and the holding time is 100 minutes , the holding temperature is 165°C, the maximum steam release time is 40 minutes, and the pressure is 0Mpa;

[0038] 3. Chlorination: chlorinate the cooked slurry, add hydrochloric acid, liquid chlorine and caustic soda according to the metering, to ensure that the acid content before chlorination is 0.16g / l, the chlorine content after chlorination is 0.25g...

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Abstract

The invention relates to a production technology for a high-wet modulus cotton pulp, which comprises the following steps: preparing raw materials: taking cotton linters as the raw materials, opening, removing impurities, sending to a cyclone separator by air, fully mixing the raw materials with alkali liquor, and then extruding and dewatering; digesting: feeding slurry soaked with the alkali liquor into a spherical digester for digesting; chloridizing: chloridizing the digested slurry; bleaching: feeding the chloridized slurry into a bleaching tank for bleaching, and concentrating the slurry by using a concentrator before bleaching at the feeding moment; performing acid treatment: performing the acid treatment on the bleached cotton pulp and feeding hydrochloric acid into the bleaching tank in a spraying mode; and obtaining an end product: making by using a paper maker and packing into the end product of the cotton pulp. According to the production technology provided by the invention, a dry impurity-removing machine is firstly utilized to fully separate, scatter and purify the slurry, and then the slurry enters into a spiral sieve drum type extruder, and the cotton fibers are more uniformly soaked in the alkali liquor; the digesting uniformity is increased; the cost of the raw materials is low; the processing process is simple; the operation is convenient; the purchasing scope of the raw materials is wide and is unlimited; the output of modal fiber products is increased; and the development of the modal fiber industry is boosted.

Description

technical field [0001] The invention relates to a production process of cotton pulp in the fiber production industry, in particular to a production process of high wet modulus cotton pulp suitable for modal fibers. Background technique [0002] Modal fiber is favored by the market because of its good hygroscopicity and high wet modulus. Modal fiber products have long been in a monopoly position in the domestic market. Modal fiber has very strict requirements on the quality of raw materials (pulp), especially for methyl fiber, and also has specific requirements for the degree of polymerization. Therefore, most of the modal fibers currently produced in China are high-quality fibers made of imported wood pulp. Not only the cost of raw materials is high, but the procurement of raw materials is also restricted by many factors, which has brought economic and procurement troubles to many manufacturers. High-volume production applications affecting products. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21C9/10
Inventor 纪天龙陈玉彬姬荣亮曹杰郭新宾彭立民郑焕起赵龙锁
Owner TANGSHAN SANYOU GRP DONGGUANG PULP CO LTD
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