毛竹化学机械法制浆及配抄纸杯原纸的研究

Preparation of Bamboo Chemical Mechanical Pulp and Application in Carton Base Paper

关键词:  毛竹化机浆  制浆得率  磨浆能耗  纸浆性能  纸杯原纸

Key Words:bamboo CMP  pulping yield  refining energy consumption  pulp properties  carton base paper

摘要:探究了用碱量、浸渍时间和制浆工序对毛竹化机浆得率、磨浆能耗、浆料质量及所抄纸杯原纸性能的影响。结果表明，制浆得率与用碱量和制浆工序密切相关，制浆得率随着用碱量增加而降低，浸渍后对竹片进行螺旋挤压会降低制浆得率；磨浆能耗主要受用碱量的影响，在用碱量为8%及以上时，制取的加拿大游离度为300 mL的纸浆磨浆能耗稳定在300~400 kWh/t浆；浆料强度随用碱量的增加而增加，浸渍后对竹片进行螺旋挤压能有效提高浆料强度、降低用碱量，在用碱量为8%时，制备加拿大游离度为300 mL的浆料其抗张指数高于25.0 N·m/g，满足纸杯原纸用浆要求；在毛竹化机浆配比为60%~70%时，以其为芯层制备的纸杯原纸能够达到行业标准中优等品的要求。

Abstract:The effects of the amount of alkali， the immersion time and the pulping process on the yield of moso bamboo chemical mechanical pulp， the refining energy consumption， the quality of the pulp and the properties of the carton base paper were explored. The results showed that pulping yield was closely related to the amount of alkali and the pulping process. The pulping yield decreased as the amount of alkali increased. Screw extrusion of the bamboo chips after immersion would reduce the pulping yield. The refining energy consumption was mainly affected by the amount of alkali. When the amount of alkali was 8% and above， the refining energy consumption with a freeness of 300 mL CSF was stable between 300~400 kWh/t pulp. The pulp strength was improved by increasing alkali consumption. Screw extrusion of the bamboo chips after immersion not only improved the pulp strength effectively， but reduced the alkali consumption. When the amount of alkali was 8%， the tensile strength of pulp with a freeness of 300 mL CSF was higher than 25.0 N·m/g， which met the pulp of carton base paper requirements. When the ratio of moso bamboo chemical machinery pulp was 60%~70%， the prepared carton base paper could meet the requirements of superior products in the industry standard.