CN101824765A - Production process of low-ration high-strength waterproof plaster board mask paper - Google Patents

Abstract

The invention discloses a production process of low-ration high-strength waterproof plaster board mask paper, comprises the three steps of material preparation, pulp production and paper making. National waste newspaper, imported American wastepaper and various addictives are added according to a certain ratio and can be adjusted by corresponding processes, so that the invention has reasonable process path, realizes reasonable matching of long and short fibers, improves the quality of products, reduces the paper ratio of finished products, improves the physical strength, also saves resources, and greatly reduces the production cost of a plaster board. The plaster board mask paper produced by using the process has the characteristics of low ratio, high strength, favorable fireproof performance, attractiveness and the like and can completely replace imported products.

Description

Production process of low-ration high-strength waterproof plaster board mask paper

Technical field

The present invention relates to a kind of production technology of protecting paper of gypsum board.

Background technology

In recent years, this novel environment friendly building materials of Thistle board, become the new lover of architectural decoration with plurality of advantages such as its environmental protection, lightweight, sound insulation, insulations, the demand of Thistle board is continuous growth trend year after year, output will increase progressively important raw and processed materials---the protecting paper of gypsum board as plasterboard with annual 30% development speed, and the domestic demand amount will be brought up to about 900,000 tons by present 520,000 tons.

China has only several families to produce protecting paper of gypsum board at present, output is little, can not satisfy the growing market demand, and product is in low and middle-grade ranks, ubiquity is quantitatively high (quantitatively to reach 210g/m2, low quantitative mask paper now is 180g/m2), a series of problems such as intensity is low, cause the production cost of plasterboard generally higher, be unfavorable for long-run development, also had a strong impact on the moulding of gypsum board production line, rate of drying etc., unstable product quality, bubble appears easily, layering, there is very big gap in defectives such as imperfect bonding with external plasterboard industry, and therefore high-grade low quantitative protecting paper of gypsum board still relies on import to solve.

Summary of the invention

For solving the problem that domestic protecting paper of gypsum board is quantitatively high, intensity is low, the invention provides a kind of production technology of low quantitative waterproof gypsum board mask paper, its technical scheme of taking is:

This technology comprise get the raw materials ready, slurrying and three workshop sections of papermaking, concrete process is as follows:

(1) gets the raw materials ready

U.S.'s old and useless newspaper and domestic old and useless newspaper are mixed by 5: 5 weight ratio, and the deinking slurry production line that is transported to slip house is used for production deinking slurry; Simultaneously waste and old boxboard of the U.S. and domestic waste and old boxboard are mixed by 6: 4 weight ratio, the OCC slurry production line that is transported to slip house is used to produce the OCC slurry;

(2) slurrying

In deinking slurry production line operation, at first to become weight concentration through the pulper size degradation be 10% slurry to wastepaper as raw material; Then concentration dilution to 2% screen successively, purification, deinking flotation, concentrate, making beating handles, and the slurry beating degree is controlled at 35-40 ° of SR; Enter the starch adhesive machine chest at last, the weight concentration that adds after the 15kg gelatinization by every production 1000kg finished paper in machine chest is the cationic starch glue of 4-5%;

In OCC slurry production line operation, at first to become weight concentration through the pulper size degradation be 3.5% slurry to wastepaper as raw material; The processing of screening successively then, purify, concentrate, pull an oar is controlled at 25-30 ° of SR with the slurry beating degree; Enter core slurry machine chest and prime cement machine chest at last respectively, the weight concentration that adds after the 15kg gelatinization by every production 1000kg finished paper in each machine chest is the cationic starch glue of 4-5% respectively;

(3) papermaking

At first to obtain weight concentration respectively after the approach system dilution be the uniform pulp suspension of 0.4-0.7% to the slurry that comes out from starch adhesive machine chest, core slurry machine chest and prime cement machine chest; In each pulp suspension, add the 14-17kg gum rosin respectively then by every production 1000kg finished paper, add 70-80kg aluminum sulfate by every production 1000kg finished paper, add 0.5kg alkali blue, yellow dye by every production 1000kg finished paper, wherein the weight proportion of alkali blue dyestuff and basic yellow dyes is 2: 1; Each pulp suspension moulding of on the forming web of paper machine, dewatering respectively subsequently, the spray starch that adds 15kg according to every production 1000kg finished paper carries out the interlayer spray; The l Water Paper page or leaf that compound back is formed carries out press dewatering, oven dry, top sizing, press polish successively, batches at last, rewinding promptly gets should low quantitative waterproof gypsum board mask paper product, and wherein to adopt every production 1000kg finished paper adding 9-12kg weight concentration be that 5% WPT63 impedance agent solution carries out to top sizing.

The present invention utilizes wastepaper as raw material, adjustment production technology, interpolation auxiliary agent etc. to produce low quantitative ordinary gypsum board mask paper.At material papering section, domestic waste and old paper, the waste and old paper of the import U.S., make it satisfy the requirement of producing low quantitative protecting paper of gypsum board, and supply with slurrying Workshop Production, stabilized product quality uniformly through optimizing materials proportionings such as Bales Off, selections according to product quality.In slurrying workshop section, wastepaper as raw material through size degradation, screening, purification, concentrate, process such as making beating, rationally regulate and advance to starch concentration, equipment pressure reduction, transform local technological process, adjust beating equipment electric current etc., maximized maintenance fibre length is avoided in the pulping process secondary stock being cut off as far as possible, and add auxiliary chemicals such as cationic starch, improve product appearance, improve pulp strength, reach and satisfy the purpose of producing.In papermaking workshop section, slurry is produced uniform suspension dexter feeder by approach system, through moulding, squeezing, oven dry, applying glue, batch, rewinding, and add gum rosin, aluminum sulfate, interlayer and strengthen starch, impedance agent, regulate water resistance and tensile strength.

The present invention adds domestic disregard message paper, import American waste paper and various auxiliary agent according to a certain percentage; carry out corresponding technology adjustment; make process route reasonable; the realization long and short fiber is reasonably combined; improve the quality of products, it is quantitative to reduce finished paper, improves physical strength and water resistance; economize on resources and protect environment, realize better comprehensive utilization of resources effect.

Good effect of the present invention is:

1, raw material are waste paper, and utilizing waste paper pulp-making is a feasible approach of China's paper industry, both economizes on resources, and can preserve the ecological environment again, meets national industrial policies.

2, low quantitative, high-intensity waterproof gypsum board mask paper has the very high market competitiveness, fully can import substitutes, can reduce the production cost of plasterboard significantly.

The specific embodiment

Describe the present invention below in conjunction with embodiment:

This technology comprise get the raw materials ready, slurrying and papermaking three process, concrete process is as follows:

1, gets the raw materials ready

With waste paper Bales Off, selection, sort out other gobs such as plastics, pop can, U.S.'s old and useless newspaper and domestic disregard message paper mix by 5: 5 part by weight, be transported to the deinking slurry production line production deinking slurry of slip house through chain mat machine, be used for the protecting paper of gypsum board vermicelli and use, to obtain good surface appearance.

Waste and old boxboard of the U.S. and domestic second hand cases paperboard mix by 6: 4 weight proportion, and the OCC slurry production line that is transported to slip house continuously is used to produce the 0CC slurry, and wherein import American waste paper intensity height is a main raw material of producing low quantitative protecting paper of gypsum board.

2, slurrying

In deinking slurry production line operation, at first to become weight concentration through the pulper size degradation be 10% slurry to wastepaper as raw material; Concentration dilution to 2% enters two sections coarse sizings then, and bulky impurity sieve is gone, and enters four sections low dense scummers, with heavy Impurity removal, as fine sand, glass etc., through three sections fine screen choosings, further improves slurry quality then; Carry out the deinking flotation by deinking equipment then and handle, remove the printing ink that dissociates and in the newspaper, improve pulp brightness; Advance Reverse Cleaner then the gluing thing of light specific gravity is removed, as glue, wax etc., slurry enters conical refiner processings of pulling an oar after concentrating, slightly to discongest, keep fibre length as far as possible, and the minimizing cut-out is controlled at 35-40 ° of SR with the slurry beating degree; Enter the starch adhesive machine chest at last, the weight concentration that adds after the 15kg gelatinization by every production 1000kg finished paper on-line continuous in machine chest is the cationic starch glue of 4-5%, is used to improve finished paper intensity and regulates the slurry current potential.

In OCC slurry production line operation, at first to become weight concentration through the pulper size degradation be 3.5% slurry to wastepaper as raw material; Enter two sections coarse sizings then, bulky impurity sieve is gone, enter four sections low dense scummers,,, through three sections fine screen choosings, further improve slurry quality then as fine sand, glass etc. with heavy Impurity removal; Advance Reverse Cleaner then the gluing thing of light specific gravity is removed, as glue, wax etc., slurry enters conical refiner processings of pulling an oar after concentrating, slightly to discongest, keep fibre length as far as possible, and the minimizing cut-out is controlled at 25-30 ° of SR with the slurry beating degree; Enter core slurry machine chest and prime cement machine chest at last respectively, the weight concentration that adds after the 15kg gelatinization by every production 1000kg finished paper in each machine chest is the cationic starch glue of 4-5% respectively, is used to improve finished paper intensity and regulates the slurry current potential.

Prepared deinking slurry slurry is used for the surface layer that the paper machine is produced mask paper, and the OCC slurry is used for sandwich layer and the bottom that the paper machine is produced mask paper.

3, papermaking

At first to obtain weight concentration respectively after the approach system dilution be the uniform pulp suspension of 0.4-0.7% to the slurry that comes out from starch adhesive machine chest, core slurry machine chest and prime cement machine chest, approach system is a workshop section between the paper locomotive, its capital equipment is fan pump, pressurized screen, towards stock tank, the equipment of approach system is all considered low pulse, to reduce the influence that the paper machine is produced, liquid level, pressure, flow-control be control automatically all, prevent that fleeces is poly-in the course of conveying, supply with the uniform pulp suspension of paper machine.

In each pulp suspension, add the 14-17kg gum rosin respectively then and carry out plasm-glue-blending, the single face suction is controlled at one minute 15-20g/m by every production 1000kg finished paper ²Add 70-80kg aluminum sulfate by every production 1000kg finished paper, aluminum sulfate act as the pH value of adjusting slurry between 5.0-6.0, and as the agent of deciding of gum rosin, make gum rosin can be adsorbed on fiber surface, make paper obtain stronger water repelling property, it is long stabilization time to meet water, press every production 1000kg finished paper with measuring pump continuously by the pipeline of approach system and add 0.5kg alkali blue, yellow dye, wherein the weight proportion of alkali blue dyestuff and basic yellow dyes is 2: 1, adds dyestuff in order to distinguish different paper kinds.

Each pulp suspension moulding of on the forming web of paper machine, dewatering respectively subsequently, along with concentration constantly increases, three layers of slurry are combined with each other, and in order to increase adhesion and the intensity between each layer, the spray starch that adds 15kg according to every production 1000kg finished paper carries out the interlayer spray.

The l Water Paper page or leaf that compound back is formed carries out press dewatering, oven dry, top sizing, press polish successively, batches, cuts promptly to get through the rewinding machine rewinding and hang down quantitative waterproof gypsum board mask paper product at last, wherein to adopt every production 1000kg finished paper to add the 9-12kg weight concentration be that 5% WPT63 impedance agent solution carries out to top sizing, in order to increase the water repelling property on mask paper surface, control water infiltrates in the mask paper.

The protecting paper of gypsum board that goes out by this explained hereafter has quantitatively low, the characteristics such as intensity is high, good looking appearance, fully import substitutes.

Claims (1)

1. production process of low-ration high-strength waterproof plaster board mask paper, by get the raw materials ready, slurrying and three workshop sections of papermaking form, and it is characterized in that concrete process is as follows:

(1) gets the raw materials ready

U.S.'s old and useless newspaper and domestic old and useless newspaper are mixed by 5: 5 weight ratio, and the deinking slurry production line that is transported to slip house is used for production deinking slurry; Simultaneously waste and old boxboard of the U.S. and domestic waste and old boxboard are mixed by 6: 4 weight ratio, the OCC slurry production line that is transported to slip house is used to produce the OCC slurry;

(2) slurrying

In deinking slurry production line operation, at first to become weight concentration through the pulper size degradation be 10% slurry to wastepaper as raw material; Then concentration dilution to 2% screen successively, purification, deinking flotation, concentrate, making beating handles, and the slurry beating degree is controlled at 35-40 ° of SR; Enter the starch adhesive machine chest at last, the weight concentration that adds after the 15kg gelatinization by every production 1000kg finished paper in machine chest is the cationic starch glue of 4-5%;

In OCC slurry production line operation, at first to become weight concentration through the pulper size degradation be 3.5% slurry to wastepaper as raw material; The processing of screening successively then, purify, concentrate, pull an oar is controlled at 25-30 ° of SR with the slurry beating degree; Enter core slurry machine chest and prime cement machine chest at last respectively, the weight concentration that adds after the 15kg gelatinization by every production 1000kg finished paper in each machine chest is the cationic starch glue of 4-5% respectively;

(3) papermaking

At first to obtain weight concentration respectively after the approach system dilution be the uniform pulp suspension of 0.4-0.7% to the slurry that comes out from starch adhesive machine chest, core slurry machine chest and prime cement machine chest; In each pulp suspension, add the 14-17kg gum rosin respectively then by every production 1000kg finished paper, add 70-80kg aluminum sulfate by every production 1000kg finished paper, add 0.5kg alkali blue, yellow dye by every production 1000kg finished paper, wherein the weight proportion of alkali blue dyestuff and basic yellow dyes is 2: 1; Each pulp suspension moulding of on the forming web of paper machine, dewatering respectively subsequently, the spray starch that adds 15kg according to every production 1000kg finished paper carries out the interlayer spray; The l Water Paper page or leaf that compound back is formed carries out press dewatering, oven dry, top sizing, press polish successively, batches at last, rewinding promptly gets should low quantitative waterproof gypsum board mask paper product, and wherein to adopt every production 1000kg finished paper adding 9-12kg weight concentration be that 5% WPT63 impedance agent solution carries out to top sizing.