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Surface glued newsprinting paper and manufacturing method thereof

A technology of surface sizing and newsprint, applied in the direction of paper, etc., can solve the problems of difficult to meet the high-speed color printing machine, the printing picture is not clear enough, and the color printing adaptability is poor, and achieves bright color, good color printing adaptability, and simple manufacturing process. Effect

Inactive Publication Date: 2003-11-12
YUEYANG FOREST & PAPER CO LTD
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] Compared with the surface sizing newsprint we invented: general ordinary newsprint is made of recycled fiber or a large amount of mechanically ground wood pulp, the paper has low whiteness, surface strength and tensile strength, is easy to break, and has poor color printing adaptability , the printed picture is not clear enough to meet the requirements of high-speed color printing machines; the surface sizing newsprint invented by Yueyang Paper Co., Ltd. is equipped with part of the company's own intellectual property rights of Alkaline Hydrogen Peroxide Thermomechanical Pulp (APMP) ), using advanced in-machine sizing / coating, soft roll calendering process

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0009] Embodiment: Coniferous wood BKP pulp, Italian poplar APMP pulp and groundwood pulp, which are beaten to an appropriate degree of beating respectively, are prepared in a ratio of 28:35:37 to prepare 900kg of mixed pulp, and 70kg of light calcium carbonate filler and its appropriate amount are added. Other chemical additives are prepared into paper stock, and the paper stock is formed by wire section, combined pressing, pre-drying, sizing, soft calendering finishing, coiling, and rewinding to obtain 1000kg of surface-sized newsprint of the size required by the user. The concentration of the screen size is 0.7%; the pH value is 7.2, the degree of percussion is 55°SR; the solid content of the sizing agent is 8%, and the sizing amount is 2g / m 2 The dryness of the sheet before sizing is 93%, and the dryness of the sheet after sizing is 68%; the nip pressure is 30kg / cm, the calendering temperature is 60°C, and the moisture content of the sheet before the calendering is 7%; Tak...

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PUM

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Abstract

The present invention discloses a surface-sized news-paper and its making method. It includes the following steps: using bleached sulfate needle wood pulp (BKP), beating, then mixing it with Italia poplar alkaline hydrogen peroxide hot-ground mechanical wood pulp (APMP) and bleached mechanical grindstone ground wood pulp (GP), according to mixing ratio blending them into mixed pulp, adding auxiliary material and making them into raw material pulp for making paper. The standard quantity of said news-paper is 45-49 g / sq.m, brightness (ISO) is 57-63%, opaqueness is greater than 91%, transverse tearing index is greater than 5.5mV, sq.m / g, surface strength is greater than 0.5 m / s, and breaking length longitudinal is greater than 4000 m.

Description

technical field [0001] The invention relates to a surface sizing newsprint and a manufacturing method thereof. Background technique [0002] In recent years, with the development of printing technology and the enrichment and continuous improvement of people's living standards, the requirements for printing and publishing paper are getting higher and higher. Newsprint, which is an important part of publishing and printing paper, is also trying every means to improve the quality of newsprint to meet the needs of social development. In developed countries and regions, publishers publish a variety of classified advertisements on a large number of pages. In order to enhance the advertising effect, newsprint is required to have a considerable level of whiteness and printability. Enterprises must continue to improve the grade of newsprint according to market needs to meet the high requirements of users. [0003] Compared with the surface sizing newsprin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H23/22
Inventor 张栋基杨傲林郭勇为刘洪波陈金山尹超李丹龚群飞张菊先章志勇
Owner YUEYANG FOREST & PAPER CO LTD
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