Paper weight

 

(57) Abstract:

Use: in the manufacture of various packaging paper and cardboard, and wood fibre boards. The inventive paper pulp contains fibrous material, a sizing agent, alumina and the precipitator. As a precipitator it contains a mixture of poly-1, 2-dimethyl-5-vinylpyridinium with polyacrylamide or the product of copolymerization of 1,2-dimethyl-5-vinylpyridinium with acrylamide, or the product of polymerization of 1,2-dimethyl-5-vinylpyridinium obtained in the presence of oksipropiltselljuloza or in the presence of the latter and a amino - g methylmalonic acid in a mixture of D, L isomers, in an amount of 0.01 to 0.07 wt. The paper weight may optionally contain a filler. 1 C.p. f-crystals, 1 table.

The invention relates to the pulp and paper industry, in particular the production of various packaging paper, cardboard, and fiberboard, and can be used mainly for the production of fluting and cardboard for flat layers of corrugated material.

Famous paper pulp containing fibrous material, filler, about (PAA-gel). When the content of PAA-gel in amounts of 0.02-0.04% in the presence of alumina hold kaolin is 60-80% Additive PAA-gel is not effective for dewatering pulp at low tide. PAA-gel characterized by instability properties, low content of basic substance (up 8%), a large number of impurities.

The closest technical solution is paper pulp containing fibrous material, a sizing agent, alumina and precipitator [2]

As precipitant mixture contains poly-N-trimethylammoniumchloride the methyl sulfate with a molecular mass of 500000-15000000.

The drawback of the prior lack of effectiveness of the retention components paper pulp.

Use for mass production of paper, cardboard, semi-hardwood, recycled paper, leads to a sharp increase in the technological stream of small fibers and mineral suspended solids, which leads to deterioration of low tide paintings, excessive consumption of fresh water, installed a sewage treatment apparatus for trapping small fibers and wastewater treatment.

The purpose of the invention use in paper production, Osada is the sing of fresh water.

The invention consists in that paper pulp containing fibrous material, a sizing agent, alumina and the precipitator, as the latter contains a mixture of the product of polymerization of 1,2-dimethyl-5-vinylpyridinium with polyacrylamide or the product of copolymerization of 1,2-dimethyl-5-vinylpyridinium with acrylamide, or the product of polymerization of 1,2-dimethyl-5-vinylpyridinium - Fata obtained in the presence of oksipropiltselljuloza or in the presence of the latter-amino-methylmalonic acid in a mixture of D, L isomers in the following ratio, wt. Sizing substance 0,1-2,0 Alumina Of 0.3-2.5 Precipitator 0,01-0,07 Fibrous material the Others

Noah

The paper weight may further comprise of 10.0 to 21.0 wt. filler kaolin. The hydrophilic component molecules of acrylamide is not very developed due to the high ability to form hydrogen bonds, which interacts with a molecule of the cellulose, and polyvinylpyridine component having a large hydrophobic ability leads to increased adsorption interactions. This combination of mechanism of interaction precipitator system paper pulp leads to increased abstain and aqueous solutions of Quaternary salts of 1,2-dimethyl-5-vinylpyridinium or its copolymerization with acrylamide effective initiator-oksipropiltselljuloza and detoxifier-amino-methylmalonic acid in a mixture of D, L isomers. Charged to the reactor a mixture of the Quaternary salt of 1,2-dimethyl-5-vinylpyridinium and acrylamide, dissolved in water in the required molar ratio or load Quaternary mol of 1,2-dimethyl-5-vinylpyridinium. Create an inert atmosphere by briefly (1-2 min) purge with nitrogen, enter the initiator-oxipropylcellulose as 0.01 and 0.1% by weight of monomer. The copolymerization or polymerization is carried out in the presence of the antidote- -amino-methylmalonic acid in a mixture of D, L isomer, the amount of which is equivalent to the impurities of the polymerized salt. The reaction mixture was poured into the reaction cell in an atmosphere of air. The process is fully carried out in isothermal or adiabatic mode. The completeness of the conversion is determined by the dosage of initiator and duration of reaction. The polymer is completely soluble in water, has no characteristic odor of vinylpyridine. This precipitator can be obtained as a mixture of the product of polymerization of 1,2-dimethyl-5-vinylpyridinium (polymerization is described above diagram) and polyacrylamide. This precipitant in the presence of oksipropiltselljuloza should be used in the production of the biological objects it is advisable to linerization and to conduct copolymerization in the presence and detoxifier-amino-methylmalonic acid in a mixture of D, L-isomers.

Pulp prepared as follows. Fibrous material to grind 28-30 SR, then added with stirring to the dispersion of the sizing agent, alumina, aqueous suspension of the filler and an aqueous solution of the precipitant. As a precipitator paper pulp comprises a mixture of the product of polymerization of 1,2-dimethyl-5-vinylpyridinium with polyacrylamide or the product of copolymerization of 1,2-dimethyl-5-vinylpyridinium with acrylamide or polymerization product of 1,2-dimethyl-5-vinylpyridinium - Fata obtained in the presence of oksipropiltselljuloza or in the presence of the latter and-amino--methylmalonic acid in a mixture of D, L isomers. Cooked pulp mix and produce a sheen on normal mode. Weight of castings 125 g/m2.

In laboratory conditions (examples 1, 2, 3, 4, 5) it was studied the influence of the precipitator on the degree of retention of the filler, a sizing agent and resin fiber. Were carried out industrial tests of the influence of the precipitator on the degree of retention of the above mentioned substances fiber (examples 6 and 7).

P R I m e R 1. Cook pulp containing fibrous material bleached, prokleivayutsya, obtained in the presence of oksipropiltselljuloza in the following ratio, wt. Filler 10,0 Sizing substance 1,0 Alumina 1.5 Precipitator 0,02 Fibrous material 87,48

P R I m m e R 2. Cook pulp containing fibrous material bleached pulp, sizing substance rosin size, the alumina filler kaolin, precipitator polymerization product of 1,2-dimethyl-5-vinylpyridinium obtained in the presence of oksipropiltselljuloza-amino-methylmalonic acid in a mixture of D, L isomers in the following ratio, wt. Filler 10,0 Sizing substance 1,0 Alumina 1.5 Precipitator 0,03 Fibrous material 87,47

P R I m e R 3. Cook pulp containing fibrous material bleached pulp, sizing substance, the adhesive paste, the alumina filler kaolin, precipitator is the product of copolymerization of 1,2-dimethyl-5-vinylpyridinium - veil with acrylamide obtained in the presence of oksipropiltselljuloza in the following ratio, wt. Filler 15,0 Sizing substance 1,5 Alumina 2.0 Precipitator 0,04 Fibrous material 81,46

P R I m e R 4. Cook pulp containing fibrous materialisation 1,2-dimethyl-5-vinylpyridinium - veil with acrylamide, obtained in the presence of oksipropiltselljuloza and-amino--methylmalonic acid in a mixture of D, L isomers in the following ratio, wt. Filler 15,0 Sizing substance 1,5 Alumina 2.0 Precipitator 0,05 Fibrous material 81,45

P R I m e R 5. Cook pulp containing fibrous material bleached pulp, sizing substance rosin size, the alumina filler kaolin, precipitant mixture of the product of polymerization of 1,2-dimethyl-5-vinylpyridinium and polyacrylamide (in the ratio of 1:0.25 in) in the following ratio, wt. Filler 21,0 Sizing substance 2.0 Alumina 2.5 Precipitator 0,07 Fibrous material 74,43

P R I m e R 6. Cook pulp containing fibrous material unbleached sulfite pulp, sizing substance tall oil rosin, alumina, precipitator polymerization product of 1,2-dimethyl-5-vinylpyridinium obtained in the presence of oksipropiltselljuloza in the following ratio, wt. Sizing substance 0.2 Alumina 0.5 Precipitator 0,06 Fibrous material 99,24

P R I m e R 7. Cook pulp containing fibrous material unbleached sulfite pulp, problemsaustralia and polyacrylamide (in the ratio of 1:0.25 in) in the following ratio of components, wt. Sizing substance 0.1 Alumina 0.3 Precipitator 0,02 Fibrous material 99,58

The compositions of the paper of the masses and their properties are given in table.

1. PAPER pulp containing fibrous material, a sizing agent, alumina and precipitator, characterized in that as a precipitator it contains a mixture of the product of polymerization of 1,2-dimethyl-5-vinylpyridinium with polyacrylamide, or the product of copolymerization of 1,2-dimethyl-5-vinylpyridinium with acrylamide, or the product of polymerization of 1,2-dimethyl-5-vinylpyridinium obtained in the presence oxypropylene-butylperoxide or in the presence of the latter and a-amino - g-methylmalonic acid in a mixture of D, h-isomers in the following ratio, wt.

Sizing substance 0,1 2,0

Alumina 0,3 2,5

Specified precipitator 0,01 0,07

Fibrous material Rest

2. Weight under item 1, characterized in that it additionally contains 10 to 21 wt. the filler.

 

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