The Preparation Process Of Reed Pulp Viscose Fiber

In recent years, along with our country textile industry technology innovation and viscose industry science and technology progress, viscose fiber in textile field demand is gradually increasing, along with our country in the world’s largest producer of viscose fiber and viscose fiber has become one of the main raw materials of textile fiber. The vigorous development of viscose industry will continue to increase demand for downstream products of pulp, the current domestic traditional wood pulp, bamboo pulp, cotton pulp, etc., due to raw material resource constraints, production still cannot meet the production requirements of the viscose fiber industry in our country, still needs a large number of imported each year. Therefore, vigorously develop the new material preparation viscose fiber with pulp, reed for the healthy development of the viscose fiber industry in China, plays a decisive role.This paper with high quality of effluents produced reed as raw material, through hydrolysis, caustic soda cooking, chloride(C), alkali treatment(E), hypochlorite bleaching(H), acid treatment(A)process, such as the preparation of viscose fiber with pulp production. The results show that:(1) early optimum process conditions for hydrolysis section: liquid ratio 1:6, heating speed is 8 ℃ / 10 min, heat preservation temperature is 170 ℃, time of 60 min. The process conditions of slurry performance indicators: rate 88.78%, cellulose content is 53.32%, 11.01% poly pentose content.(2) the section method of caustic soda cooking of optimum technological conditions for: using alkaline 23%, heating speed is 8 ℃ / 10 min, liquid ratio 1:4. 5, heat preservation temperature is 165 ℃, holding time is 120 min. The performance of the process conditions are as follows: 46.6% yield, K value of 8.2, the residual alkali 8.6 g/L, x 92.2% cellulose content, degree of polymerization of 703, the ash content of 1.46%.(3) the period of optimum technological conditions for chloride: using chlorine content 3.5%, slurry concentration 3%, normal temperature, time, 60 min. Optimum technological conditions of performance indicators are: combustion of cellulose content of 92.9%, the polymerization degree of 685.(4) alkali treatment period of optimum technological conditions for: 5% with alkaline, 0.5% hydrogen peroxide, temperature 70 ℃, 60 min time, pulp concentration 10%. Optimum technological conditions of performance indicators are: x 95.3% cellulose, degree of polymerization, whiteness 62.2% ISO 665, yield 96.1%.(5) section hypochlorite bleaching of optimum technological conditions for: at the beginning of floating p H11.5, floating rate 2%, temperature 40 ℃, pulp concentration 10%, time of 60 min. Performance of the optimum process conditions are as follows: x 94.7% cellulose content, degree of polymerization, whiteness 83.1% ISO 586, ash content of 0.87%.(6) acid treatment period of optimum technological conditions for: initial pH 3.0, temperature 40 ℃, 30 min 5%, 0.5% sodium hexametaphosphate, plasma concentration. Performance of the optimum process conditions are as follows: alpha cellulose content 95.0% 95.0%, white 83.5% ISO, ash content, reaction performance(8 ml of CS2) for 8 SEC.Finally, the preparation of reed pulp spinning, yarn wet rupture strength and dry fracture strength achieves the viscose filament grade a requirement in GB/T 13758-2008. Therefore, reed on the preparation of viscose fiber with pulp process is completely feasible.