SU867985A1 - Paper-making method - Google Patents

Description

(54) METHOD OF MANUFACTURING PAPER

1 °

This invention relates to methods for making paper, preferably sack paper, and can be used in the pulp and paper industry.

There are many ways to produce paper by treating fibrous cellulose-containing material with various sizing agents and emptying the paper web, for example, a method for producing bag paper, which unbleached sulphate pulp is milled to ZO-ZZ SR, with stirring, it is treated with a mixture of rosin glue, rubber latex and aluminum alum and cast paper sheet G13.

The method is also known to be made of NIN moisture resistant and water resistant paper, including the treatment of cellulose containing fibrous material with isopropenyl ether of fatty acids G2.

However, paper made by known methods has a high cost because of the high costs of cellulose 80 g per 1 m of paper and the use of expensive and scarce chemical sizing agents.

Closest to the present invention is a method of making paper, including grinding unbleached sulphate 1010 daza, processing it with stirring with a mixture of rosin and alumina introduced by a sizing agent, and pouring out Z3 paper web.

15

Claims (3)

The disadvantage of the known paper making method is the high cost of 1 ton of paper (211.57 rubles), since the pulp costs of 78 1 M paper are still significant. In addition, the increase in cost is influenced by the use of scarce and expensive gum rosin (worth 1300 rubles per ton) and alumina (cost 4A, 4 rubles per ton). The purpose of the invention is to reduce the self-cost of the paper while maintaining its high physical and mechanical properties. This goal is achieved by the manufacture of paper, mainly bag, including grinding of unbleached sulphate pulp, the introduction of a sizing agent and the edges of the paper web. As a sizing reagent, a dicarboxylic ester ester salt is used — a waste of plasticizer production in an amount of 1–5% by weight of absolutely dry fiber. When using the above salt as a sizing reagent in the proposed quantities, the paper weights decrease to 70 g / m and its physicomechanical indicators remain high compared with the known paper making method. Using waste production and reducing fiber-containing cellulose-containing paper. material on 1 m of paper provides a decrease in its cost. The technology of the method is as follows. The fibrous cellulose-containing material, namely, sky sulfate pulp, is ground at a concentration of I%, and a sizing pea gent is introduced with stirring, and one of the following salts is used as the salt: T sodium salt of mono-2-methyl-xylophthalate (production waste, dioctyl phthalate plasticizer) ; 11 sodium salt of monobutyl phthalate (waste from the production of plasticizer, dibutyl phthalate); Ø sodium salt of monobutyl sebacate (waste of production of a dibutyl sebacate fixer). These salts are administered in amounts of 1%, 3% and 5% by weight of absolutely dry fiber. The paper web is poured on the LO-A-1 sheet-casting machine according to the three options: in an acidic, neutral and alkaline medium. The mass of the cast paper is 70 g / m. After conditioning the samples, a GC-ST 135 25.7-68 test was carried out. The test results are shown in Table. 1-4. From the data presented in Tables 1-3, it can be seen that the quantitative content of the injected sizing agent is 1-5% by weight of absolutely dry fiber. . With the introduction of less than 1% of these salts into the fibrous mass, the physical and mechanical parameters of the paper produced do not correspond to GOST on bag paper. Introduction of more than 5% of salt into the fiber pulp is not feasible, since it does not improve 4 of the mechanical and mechanical parameters of the paper produced. In the above example (Table 4), the weight of paper obtained by the proposed method is reduced by 8 N per 1 m compared to the limestone method, while the physico-mechanical indicators of the paper remain high, and some indicators are improved, for example, the breaking length increases to 9100 m, and distribution of pushing up to 3.7 kgf / cm. Using the proposed paper making method, in comparison with the existing methods, the cost of paper is reduced by reducing the consumption of fibrous cellulosic material by 8-10 g per 1 m of replacing the scarce and expensive chemical sizing agents with production waste. The physicomechanical characteristics of the paper remain high, and some, for example, rupture length and resistance to bursting are improved. All this allows you to get cheaper. retaining its physicomechanical characteristics, save scarce and expensive raw materials, and also recycle plasticizer production wastes. The expected economic effect on the Novolinsky Pulp and Paper Mill will amount to 190080 thousand rubles due to a reduction in the prime cost of I ton of paper, due to a reduction in the consumption of cellulose and the replacement of rosin and alumina by the waste of production t million 41 thousand rubles. Claims The method of making paper, mainly sack paper, includes grinding unbleached sulphate pulp, introducing a sizing agent and casting a paper web, characterized in that, in order to reduce the cost of paper while maintaining its high physical and mechanical properties, it is used as sizing agent . sodium salt of ester dicar8 512 lateral acid is a waste of plasticizers production in the amount of 1-5% by weight of absolutely dry fiber. Sources of information taken into account during the examination 1. USSR author's certificate No. 318656, cl. D 21 H 3/34, 1971. 2. USSR author's certificate number 503971, cl. O 21 H 3/34, 1976. 3. Ivanov S. N. Paper technology. Forest industry. M., 1970, p. 149 (prototype).