打浆对硅酸盐矿物纤维形态及其纸张性能的影响研究

Research on the Effects of Beating on the Fiber Morphology of Silicate Mineral Fibers and the Resulting Paper Properties

关键词:  硅酸盐矿物纤维  打浆  纸张性能

Key Words:silicate mineral fibers  beating  paper properties

摘要:本文以无机硅酸盐矿物纤维为研究对象，通过对比不同打浆度下的纤维形态变化，分析其对纸张性能的影响。结果表明，随打浆时间增加，浆料打浆度不断提高，束状矿物纤维逐步松解分丝，并出现明显细化絮团，纤维湿重下降，打浆结束后纤维平均长度为576 μm，比未打浆时减少了36.28%，而纤维平均宽度为26.3 μm，比未打浆时增加了10.97%；所抄无机硅酸盐矿物纤维纸的抗张指数先升高后下降，撕裂指数随纤维平均长度变小逐步下降，适当保留纤维长度是维持成纸强度的关键。当硅酸盐矿物纤维打浆时间为45 min、打浆度为76 °SR、湿重10.6 g时，抄造无机纤维纸的结合强度达到最佳。

Abstract:This paper focuses on inorganic silicate mineral fibers as the research subject. By comparing the morphological changes of the fibers under different beating degrees, the study analyzes their impact on paper properties. The results indicate that as the beating time increases, the beating degree of the pulp steadily rises. Bundled mineral fibers gradually loosen and fibrillate, with notable refinement and flocculation observed. The wet weight of the fibers decreases, and upon completion of beating, the average fiber length is 576 μm, which is 36.28% shorter than that of the unbeaten fibers. Conversely, the average fiber width increases to 26.3 μm, representing a 10.97% increase compared to the unbeaten state. The tensile index of the handsheets made from inorganic silicate mineral fibers initially rises and then declines, while the tear index progressively decreases as the average fiber length shortens. Properly preserving fiber length is crucial for maintaining the strength of the formed paper. When the beating time for silicate mineral fibers is 45 minutes, achieving a beating degree of 76 °SR and a wet weight of 10.6 g, the bonding strength of the produced inorganic fiber handsheets reaches its optimum.