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Coated paper for rotary machine printing and production method thereof

A technology of coated paper and rotary machine, 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 far-reaching social benefits

Inactive Publication Date: 2005-12-14
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, use 30% softwood pulp (refining freeness 380CSF), 70% hardwood pulp (refinement 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 substrate paper, the doctor blade type double-sided double-layer ...

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Abstract

Coated paper for rotary printing machines and its production method is a kind of coated paper with the same printing effect as ordinary coated paper, but the temperature resistance is improved by about 20-30 degrees and its production method. The coated paper includes hardwood pulp, softwood pulp made of pulp, fillers and chemical additives mixed to form base paper, in the base paper pulp is calculated by weight, softwood pulp: hardwood pulp = 15 ~ 55: 85-45; filler: pulp=6-12:100, chemical additive: pulp=0.5-5:100; the outer surface of the base paper is coated with a coating. The production steps are: use hardwood pulp and softwood pulp to make mixed pulp, then add fillers and chemical additives to make base paper, and then coat surface sizing layer, precoat and top coat on the surface of base paper in sequence , and then after subsequent calendering treatment, it is made into coated paper for rotary printing. All coated papers can achieve the following indicators: glossiness ≥ 65°, roughness ≤ 1.2μm, ink absorption 25-35%, temperature resistance ≥ 180°C.

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 (abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/72D21H19/82
Inventor 黄良典
Owner GOLD EAST PAPER JIANGSU