Manufacturing process of antibacterial bamboo pulp used for high-wet-modulus fibre

Abstract

The invention discloses a manufacturing process of antibacterial bamboo pulp used for high-wet-modulus fibre. The manufacturing process comprises prehydrolysis, cooking, oxygen delignification, vibration frame screen screening, first washing, sand removal, first concentration, bleaching, second washing, thermal basic refining, pressurized screen preliminary sizing, second concentration, sodium hypochlorite bleaching, third washing, acid treatment, fourth washing, sand removal and manufacture, wherein a hydrolysis accessory ingredient is added in a cooker in prehydrolysis. The hydrolysis accessory ingredient is added in the prehydrolysis, so that the reaction temperature of the prehydrolysis and cooking processes is reduced, thus the content fluctuation of alpha-cellulose is small, the quality is stable, the indexes can meet the pulp requirement of high-wet-modulus fibre, and the natural deodorization, antibacterial and ultraviolet resistance functions of the bamboo fiber can be furthest remained.

Description

technical field [0001] The invention belongs to the field of chemical fiber pulp production, in particular to a method for preparing antibacterial bamboo pulp for high wet modulus fibers using bamboo. Background technique [0002] High wet modulus fiber is a new generation of fiber with high strength, low elongation and swelling, high wet strength and wet modulus, which overcomes the poor wet strength and easy Disadvantages such as deformation. High wet modulus fiber pulp quality requirements are very high, and impurities such as lignin, semi-fiber, resin and ash must be fully removed, and the content of methyl fiber should usually be above 96%. demanding. Insufficient lignin removal and high hemifiber content in pulp greatly hinder the removal of hemifiber during the impregnation and pressing process of viscose preparation, which will affect the filterability of viscose and bring great negative impact on production and product quality. The effect will affect the strength...

AI Technical Summary

Problems solved by technology

Higher reaction temperature will cause the pulp produced to have the following defects: 1. The fiber molecular weight distribution range is wider; 2. The content of α-cellulose fluctuates greatly, which leads to unstable quality of bamboo pulp (higher reaction temperature It makes the reaction violent, makes it difficult to control the degree of reaction, and the reaction time is short, and some fibers are excessively degraded, resulting in an increase in hemicellulose, which also leads to a wide range of cellulose molecular weight distribution, so that the pulp quality is unstable); 3. Pulp There are more short and medium fibers of 0.05-0.3 mm (higher reaction temperature leads to violent reaction and shorter reaction time, some fibers will be excessively degraded and the fiber length will be shortened, so there are more short fibers of 0.05-0.3 mm in pulp); 4 , pulp ash, S 10 , S 18 , high content of impurities such as pentose sugar; 5. The low reactivity cannot meet the requirements of raw materials for high wet modulus fiber production; 6. The natural characteristics of bamboo fiber are destroyed during the processing of dissolved pulp, and the deodorization and antibacterial properties of the fiber , Anti-ultraviolet function is significantly reduced

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