Mulberry bark slurry used for calligraphy and painting paper and production method thereof

Abstract

The invention provides a mulberry bark slurry used for calligraphy and painting paper and a production method thereof, the method comprises the following steps: a)peeling and removing the impurities of mulberry bark, immersing by clear water for 4-12 hours; b)scouring and bleaching mulberry bark, wherein alkali temperature is 80-85 DEG C, by metering with NaOH, the alkali concentration accounts for 5-25% of absolute dry weight of the mulberry bark, hydrogen peroxide amount accounts for 0.5-5% of absolute dry weight of mulberry bark, anthraquinone amount accounts for 0.05-1% of absolute dry weight of mulberry bark, boiling osmotic agent amount accounts for 0.5-1% of absolute dry weight of mulberry bark, Na2SiO3 amount accounts for 1-10% of absolute dry weight of mulberry bark, MgSO4 amount accounts for 0.05-0.5% of absolute dry weight of mulberry bark, liquid ratio is 1: 3-20; c)performing pulp washing, wherein pH value of slurry is 7.0-8.0; d)cutting off; and e)performing pulp refining by a double disc refiner, wherein the refiner gap is 0.05-1.5mm, the slurry concentration is controlled at 20-30%, and forming small pulp pellets. The method has the advantages of simple process and easy operation, pulping is carried out without chlorine by combination of scouring and bleaching at low temperature, scouring and bleaching effects can be increased by adding a boiling auxiliary agent, a boiling osmotic agent and a bleaching stabilizing agent, the produced mulberry bark slurry has the advantages of high yield and good whiteness, and can be used for producing calligraphy and painting paper with high, middle and low grades.

Description

technical field [0001] The invention relates to the field of pulping and papermaking, in particular to a mulberry pulp for calligraphy and painting paper and a production method thereof. Background technique [0002] Mulberry is a perennial woody plant, which has the advantages of fast growth, high branch yield, strong environmental adaptability, and high economic benefits. Guangdong, Jiangsu, Zhejiang, Shaanxi, Shandong, Hebei and other provinces are famous mulberry-producing areas in my country. [0003] The mulberry bark is peeled off from the mulberry branches, accounting for 26% to 30% of the total weight of the stalk, and is a high-quality papermaking raw material. Bleached mulberry pulp can be used alone to make calligraphy and painting paper, or mixed with bleached cotton pulp, hemp pulp, coniferous wood pulp, etc. to make wax paper, tea bag filter paper, mica paper base paper and other paper. [0004] Goryeo paper is a kind of handmade calligraphy and painting pape...

AI Technical Summary

Problems solved by technology

[0005] The lignin content of mulberry bast fiber is low, while the content of pectin and 1% NaOH extract is high, so the factory usually adopts high alkali, high temperature traditional kraft cooking and hypochlorite bleaching, which makes the pulp yield low (bleaching Pulp yield is only 17% ~ 18%), high cost, poor strength, serious pollution