Preparation method of unbleached neosinocalamus affinis paper pulp

Abstract

The invention discloses a preparation method of unbleached neosinocalamus affinis paper pulp, and belongs to the technical field of pulping and papermaking. The whiteness of paper pulp prepared from neosinocalamus affinis is 25%-40% ISO, the tensile index is larger than or equal to 8 Nm/g, the folding strength is 15-140 times, the fracture length is 6-8 km, the ash content is smaller than or equal to 1.2%, the breaking length is 150-600 mN, and the beating degree is 16-22-degree SR. The preparation method of the neosinocalamus affinis paper pulp comprises the following steps of raw material repulping, steaming, deflaking, pulp grinding, screening and washing. The neosinocalamus affinis paper pulp can be used for preparing household paper. The paper pulp preparation method has the advantages of being high in yield, easy to operate, convenient to produce, low in cost and environmentally friendly, and 100% of the natural color of the neosinocalamus affinis is kept.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a method for preparing unbleached bamboo pulp. Background technique [0002] Due to the increasing shortage of wood resources in the world, it has become the goal pursued by various paper-making enterprises to produce pulp and paper without destroying forests and the environment. As a solution to this problem, the technology of making pulp from non-wood plant fibers using annual or biennial plants such as: farmland waste, bamboo, sugarcane stalks discarded after sugar production, rice and wheat straw, etc. as the main material has been attracting attention. [0003] Household paper refers to all kinds of hygienic wiping paper used to take care of personal home and going out, including roll toilet paper, removable toilet paper, boxed facial tissue, pocket facial tissue, paper handkerchief, napkin, toilet paper, kitchen paper towel, etc. . [0004] The...

AI Technical Summary

Problems solved by technology

[0004] There are many disadvantages in the cultural paper and household paper of the prior art, mostly using native wood pulp, which seriously affects the ecological balance of the environment and leads to long-term adverse consequences due to the need to cut down a large amount of wood; part of the cultural paper prepared from native wood pulp The tensile strength, softness, and water absorption of the paper do not meet the specified standards; and in the prior art, in order to increase the whiteness of the paper, European-style pulping is produced using bleached pulp as raw materials in the pulping process, and the bleaching pulp used for bleaching is There are mainly two kinds of oxidants and reducing agents; at present, oxidants are mainly used, and chlorine, hypochlorite, chlorine dioxide, etc. are more commonly used; dioxins, furans, etc. contained in organic chlorides produced in production have carcinogenic properties. sex, mutagenicity, teratogenicity, multiple cranial neuropathy and acute toxicity, and the discharged sewage has a greater adverse effect on the water environment received

After the pulp is bleached by a strong oxidant, the fiber strength will be damaged in different ways, and the strength and toughness will decrease. The products produced are prone to hair loss, powder loss, and wet strength reduction during use.