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High-quality colour printing newsprint and making technique thereof

A technology for newsprint and color printing, applied in papermaking, roll-resistant paper, papermaking and other directions, can solve the problems of paper whiteness, low surface strength and tensile strength, difficult to meet high-speed color printing machines, and the printing pictures are not clear enough. The effect of wide adjustment range, moderate ink absorption and high tensile strength

Inactive Publication Date: 2006-03-29
YUEYANG FOREST & PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, ordinary newsprint in the domestic market is made of recycled fiber or a large amount of mechanically ground wood pulp. The paper has low whiteness, surface strength, and tensile strength, and is easy to break. Requirements for high-speed color printing machines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Coniferous wood NBKP pulp, Italian poplar P-RCAPMP pulp and waste paper deinking pulp (DIP) that have been beaten to an appropriate degree of beating are prepared in a ratio of 10:40:50 to prepare 900Kg of mixed pulp, adding 70kg of light calcium carbonate and 25kg of PAM, 10kg of bentonite and 50kg of cationic starch (both for absolute dry pulp) are formulated into paper stock, which is formed by a vertical clamp former, shoe press, single-row dryer drying, soft roll calendering finishing, coiling, compounding The volume is 1000kg of high-grade color printing newsprint of the size required by the user. Concentration of 0.9% for papermaking and 6.5% for paper coiling; the basis weight of high-grade color printing newsprint is 48.5g / m 2 , moisture is 6.5%, whiteness (ISO) 58%, opacity 95%, transverse tear index 6.5mN.m 2 / g; surface strength 1.5m / s; fracture length and length 4200M; smoothness front / reverse sides 50S / 65S, difference of smoothness between two sides is 5%...

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PUM

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Abstract

The present invention adopts Itarian poplar basic hydrogen peroxide hot-ground mechanical pulp (P-RCAPMP), bleached sulphate needlebush pulp (NBKP) and waste paper ink-removed pulp (DIP) as pulp material, and adopts advanced equipments and processes of dilution pulp-flowing tank, screen forming device, boot-type pressing and soft roll calendering, etc. to make the invented high-grade colour-printing news-paper.

Description

1. Technical field: [0001] The invention relates to a high-grade color printing newsprint and its manufacturing process. 2. Background technology: [0002] In recent years, with the development of printing technology and the increasingly rich and continuous improvement of people's living standards, the requirements for printing and publishing paper are getting higher and higher. Newsprint, as an important part of publishing and printing paper, suppliers are also doing everything possible to find ways to improve the quality to meet the needs of social development. At present, ordinary newsprint in the domestic market is made of recycled fiber or a large amount of mechanically ground wood pulp. The paper has low whiteness, surface strength, and tensile strength, and is easy to break. Requirements for high-speed color printing presses. 3. Contents of the invention: [0003] The purpose of the present invention is to adopt Italian poplar P-RCAPMP pulp, waste paper deinking p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/14D21H11/00D21H17/67D21F9/00D21G1/00
Inventor 刘曙光尹超郭勇为周湘红杨振宇邵启超谈忠陈金山刘成良张菊先文飚张群飞朱宏伟
Owner YUEYANG FOREST & PAPER CO LTD
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