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Coated paper for rotary machine printing and production method thereof

A production method and technology of coated paper, applied in the direction of coated paper base paper, paper, papermaking, etc., can solve the problems of immature production technology and inability to compete with it, and achieve the effect of far-reaching social benefits

Active Publication Date: 2004-11-17
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, the domestic rotary printing coated paper market has been dominated by imported products, and domestic products cannot compete with them due to immature production technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]When making base paper, adopt 15% softwood pulp (refining freeness 400CSF), 85% hardwood pulp (refining freeness 380CSF) to prepare mixed pulp, add 10% (relative to pulp weight) heavy carbonic acid Calcium is used as a filler, and chemical additives are added, namely internal sizing starch 0.6-1.2%, alkyl ketene dimer sizing agent 0.6-1.2%, cationic polyacrylamide cationic retention aid 100-400ppm, silica gel anion Retention additive 1000-4000ppm, dehydrated and formed by the wire part, then squeezed, dried, and the moisture is controlled at 2-3% of 50g / m 2 substrate paper.

[0029] On the base paper, oxidized starch is used for sizing on the inner surface of the machine, and the amount of sizing is controlled at 2-3g / m 2 / surface, made into 55g / m 2 of paper. After drying, the water content is controlled to be 4.5-5%, and the cohesion is greater than 3.5kg.cm.

[0030] After surface sizing of the base paper, the blade coating is carried out, and the pigment ratio in...

Embodiment 2

[0032] When making base paper, adopt 30% softwood pulp (refining freeness 380CSF), 70% hardwood pulp (refining freeness 370CSF) to prepare mixed pulp, add 8% (relative to pulp weight) heavy carbonic acid Calcium is used as a filler, and chemical additives are added, namely internal sizing starch 0.6-1.2%, alkyl ketene dimer sizing agent 0.6-1.2%, cationic polyacrylamide cationic retention aid 100-400ppm, silica gel anion Retention aid 1000-4000ppm, dehydrated and formed by the wire part, then squeezed, dried, and the moisture is controlled at 2-3% of 78g / m 2 substrate paper.

[0033] On the base paper, oxidized starch is used for sizing on the inner surface of the machine, and the amount of sizing is controlled at 2-3g / m 2 / surface, copying into 84g / m 2 of paper. After drying, the water content is controlled to be 4.0-4.5%, and the cohesive force is greater than 1.5kg.cm. It can also be directly copied to 84g / m 2 For paper, control its moisture to 4.0-4.5%, and its cohes...

Embodiment 3

[0036] When base paper is made, use 50% softwood pulp (refining freeness 380CSF), 50% hardwood pulp (refining freeness 370CSF) to prepare mixed pulp, add 9% (relative to pulp weight) heavy carbonic acid Calcium is used as a filler, and chemical additives are added, namely internal sizing starch 0.6-1.2%, alkyl ketene dimer sizing agent 0.6-1.2%, cationic polyacrylamide cationic retention aid 100-400ppm, silica gel anion Retention additive 1000-4000ppm, dehydrated and formed by the wire part, then squeezed, dried, and the moisture is controlled at 2-3% 64g / m 2 substrate paper.

[0037] On the base paper, oxidized starch is used for sizing on the inner surface of the machine, and the amount of sizing is controlled at 2-3g / m 2 / surface, copying into 70g / m 2 of paper. After drying, the water content is controlled to be 4.5-5%, and the cohesive force is greater than 2.0kg.cm.

[0038] After surface sizing of the base paper, double-sided double-layer coating is carried out, and...

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Abstract

The invention is a kind of coating paper manufacturing method for rotary printer, which upgrades the temperature enduring is upgrades about 20-30 degrees. The coating paper includes paper pulp of broad-leaved wood pulp, needle-leaved wood pulp, the fillers and chemical additives, all of which are produced into base paper, in the base paper, needle-leaved wood pulp: broad-leaved wood pulp=15-55: 85-45; fillers: paper pulp= 6-12:100, chemical additives: paper pulp= 0.5-5:100; there has a coating layer out of the base paper. The manufacturing steps are: uses broad-leaved pulp and needle-leaved pulp to produce compound paper pulp, when adds in fillers and chemical additives, gets the base paper, then coats a layer of glue executing layer, precoating layer and surface coating layer on the surface of the base paper, thus the coating paper can be produced further through post pressing and polishing process. The coating paper can reach following standards: the glossiness is not less than 60 degrees, the coarse degree is not more than 1.2 micro meters, and the ink sorption rate is 25-35%, the temperature performance is not less than 180 degrees.

Description

technical field [0001] The invention relates to a coated paper for rotary press printing and a production method thereof, belonging to the technical field of papermaking. Background technique [0002] With the development of printing technology, rotary printing, as a continuous and efficient printing method, has developed rapidly in China in recent years. At present, more than 50 rotary printing machines have been put into commercial operation in China, and the annual paper consumption is about 300,000 tons. The main papers used are offset paper, lightweight coated paper and coated paper, offset paper and lightweight coated paper are generally used for printing medium and low-grade promotional materials and magazine paper, and coated paper is generally used for high-end printed matter. [0003] Due to its fast printing speed, rotary printing requires that the paper can be dried quickly after printing, so the oven temperature is relatively high (ab...

Claims

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Application Information

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IPC IPC(8): D21H19/72D21H19/82
Inventor 黄良典
Owner GOLD EAST PAPER JIANGSU
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