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Method for direct manufacturing regenerated bamboo fiber from papermaking-level bamboo pulp dregs

A manufacturing method and bamboo pulp technology are applied in textile and papermaking, fiber raw material processing, anti-corrosion/antioxidant addition and other directions, which can solve the problems of high production cost, long process, serious three waste pollution, etc. The effect of improved production efficiency and low processing cost

Active Publication Date: 2006-10-25
浙江龙赛尔纤维科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent ZL03128496.5 of Hebei Jiyu Chemical Fiber Co., Ltd. and the patent CN1465760 of Shanghai Rose Chemical Fiber Co., Ltd. both use viscose spinning to produce regenerated bamboo fiber. The process is long and the pollution of three wastes is serious.
The patent ZL03129531.2 of Donghua University uses the solvent method to manufacture regenerated bamboo fiber, which overcomes the shortcomings of the viscose method, but the use of fiber-grade bamboo pulp as raw material makes the production cost relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Commercially available paper-making grade bamboo pulp with an average degree of polymerization of 1200 was put into 60 Irradiate in the Co gamma ray source, control the radiation absorption dose to be 5KGy, the average degree of polymerization of the bamboo pulp after irradiation drops to 690, adopt the pulp cutter to cut the bamboo pulp after processing into 4~6cm×4~6cm small pieces.

[0020] 200kg of NMMO aqueous solution (the weight ratio of NMMO and water is 1) was evaporated to 135kg under reduced pressure, so that its water content was 26% (that is, the concentration of NMMO was 74%);

[0021] 15.7kg of the above irradiated bamboo pulp cut into small pieces and 135kg of evaporated NMMO aqueous solution were mixed in a 300 liter polymerization kettle, and the temperature of the kettle was 80°C. To prevent oxidation, 125 g of propyl gallate was added at the same time. Turn on the agitator and control its rotational speed to 110r / min, and turn on the vacuum system ...

Embodiment 2

[0024] Commercially available paper-making grade bamboo pulp with an average degree of polymerization of 1200 was put into 60 Irradiate in the Co gamma ray source, control the radiation absorbed dose to be 30KGy, the average degree of polymerization of the bamboo pulp after irradiation drops to 330, adopt the pulp cutter to cut the bamboo pulp after processing into 4~6cm×4~6cm small pieces.

[0025] With 200kg NMMO aqueous solution (the weight ratio of NMMO and water is 1, evaporate and concentrate under reduced pressure to 135kg, make its water content be 26% (that is the concentration of NMMO is 74%);

[0026] Put 20.3kg of above-mentioned irradiated bamboo pulp cut into small pieces and 135kg of evaporated concentrated NMMO aqueous solution into a 300-liter polymerization kettle and mix them at a temperature of 80°C. To prevent oxidation, 125 g of propyl gallate was added at the same time. Turn on the agitator and control its rotational speed to 110r / min, and turn on the ...

Embodiment 3

[0029] With the spinning dope described in Example 1, under the condition that the spinning temperature is 92°C, the pressure is 29.4×10 4 Nitrogen of Pa is injected into the booster pump, after being pressurized by the booster pump, it is filtered through the first candle-shaped pre-filter with a filtration accuracy of 40 μm and the second candle-shaped pre-filter with a filtration accuracy of 20 μm before entering the metering The pump is ejected from a 36-hole × Φ0.15mm spinneret. After passing through an air gap with a length of 80mm, the thin stream of the ejected stock solution enters a liquid containing 10% N-methylmorpholine oxide and 90% water at a temperature of 20 ℃, coagulation bath with a length of 2m, and the coagulated tow is rinsed, oiled, wound into a tube, and dried to make a specification of 150dtex / 36F, a dry strength of 3.6cN / dtex, and a dry elongation. Regenerated bamboo cellulose filaments with a length of 10%.

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Abstract

The invention relates to a method for manufacturing regenerated bamboo fiber in the chemical fiber manufacturing, concretely selecting market- sold low-grade bamboo pulp with polymerization degree greater than 1000 as raw material, making depolymerization by irradiation of high energy radial, crushing the processed bamboo pulp and dissolving in the N-methyl morpholine oxide water solution, and obtaining raw spinning liquor; the pressurizing the raw spinning liquor and filtering by prefilter, extruding the filtrate by spinneret at 70-110 deg.C, solidifying and shaping in the N-methyl morpholine oxide water solution, and drip-washing, and finally making filaments and short fibers of various standards by corresponding routine processes. And it largely reduces production cost and reduces environmental pollution and retains more features of the original bamboo fiber.

Description

technical field [0001] The invention relates to a method for manufacturing cellulose fiber by solvent method in the chemical fiber manufacturing industry, in particular to a method for directly producing regenerated bamboo fiber by using paper-making grade bamboo pulp. Background technique [0002] my country is a country where bamboo grows very commonly and is rich in bamboo resources. It is known as the "Kingdom of Bamboo". The bamboo forest area is about 5 million hectares, accounting for 30% of the world's total. The use of finished materials has sustainable development; in addition, the regenerated bamboo fiber made of bamboo as raw material not only has the general properties of cotton and wood-type cellulose fibers, but also has some unique properties, such as coolness, natural antibacterial, fragrance and Negative ion effect, etc. Therefore, bamboo is one of the raw materials of novel cellulose fibers worthy of popularization and application. [0003] Paper-making gr...

Claims

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Application Information

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IPC IPC(8): D21C5/00D21H17/07D21H21/38
Inventor 杨革生邵惠丽胡学超
Owner 浙江龙赛尔纤维科技有限公司
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