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CTP packing paper and its preparation method

A paper pad and starch technology, applied in the field of papermaking, can solve the problems of printing plate friction damage, affecting the photosensitive performance of printing plate heat-sensitive materials, acidic PH value, etc., to achieve high cleanliness, reduce the impact of photosensitive performance, and good flatness Effect

Active Publication Date: 2013-09-04
ZHEJIANG KAIFENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent applies fillers during the papermaking process, so that the dust has frictional damage to the printing plate
In addition, the use of aluminum sulfate in the papermaking process makes the pH of the paper slightly acidic, which affects the photosensitive performance of the heat-sensitive material of the printing plate.

Method used

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  • CTP packing paper and its preparation method
  • CTP packing paper and its preparation method
  • CTP packing paper and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] Step 1: Choose 30% imported bleached softwood pulp and 70% imported bleached hardwood pulp as raw materials, and mix and disintegrate the two kinds of pulp into a slurry with a concentration of 4.5% in a hydraulic disintegrator.

[0040] Step 2: The disintegrated pulp is beaten by four double-disk mills connected in series, the pulp is 41-43°SR, and the fiber wet weight is 2.5-3.5.

[0041] Step 3: After beating, add starch enhancement additives gelatinized at 95°C, which is equivalent to 0.5-1.0% of dry pulp, in the pulp mixing tank. The starch enhancement aid is quaternary ammonium cationic starch, the viscosity of its 6% concentration solution after gelatinization at 95°C is 400-1000mpa.S, and the degree of substitution is 0.025-0.035. The mass percentage added in pulp is 0.5-1%.

[0042] The third step: the prepared ...

Embodiment 2

[0050] The method shown in embodiment 1 can adopt as figure 1 The production and manufacturing system of a CTP plate liner is shown. The system includes a hydraulic disintegrator, a disc refiner and a beating machine, a pulp mixing tank, a pulp purifier, a fourdrinier forming machine, a press roll, and a press roll according to the production process. One set of drying cylinders, surface impregnating rolls, second set of drying cylinders, soft calender, spraying unit, winder, slitter, electrostatic suction unit and rewinder. The slurry mixing tank is provided with starch reinforcing aid adding equipment. like figure 2 As shown, after the base paper 1 passes through the first group of drying cylinders, it enters the surface impregnation roll through the guide roll. The surface impregnation roll includes an impregnation rubber roll 2 and an impregnation steel roll 3. The impregnation rubber roll 2 and the impregnation steel roll 3 are arranged tangentially. In the upper space...

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Abstract

The invention relates to a preparation method of CTP packing paper, comprising the following steps: 1) mixing bleached softwood pulp and hardwood pulp in proportion and repulping to prepare a slurry; 2) pulping the repulped liquid slurry to make wood pulp cellulose to be divided and broomed; 3) adding a starch pulped slurry strengthening aid; 4) purifying the prepared slurry, drying the slurry through a fourdrinier wire moulded drying cylinder, and applying a surface strengthening aid during the middle section of the drying process so as to raise wear resistance of the paper surface; 5) finishing the dried paper through soft calender to raise surface smoothness; 6) balancing internal water content to raise flatness of the paper; and 7) carrying out slitting, destaticization, dedusting and high cleaning treatments on the paper roll which has undergone paper making by a paper machine to prepare the finished product according to specification requirements so as to obtain the product. The CTP packing paper prepared by the preparation method has characteristics of good strength, high cleanliness, good smoothness, neutral pH value of paper page and the like.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a CTP pad paper and a preparation method thereof. Background technique [0002] CTP is the abbreviation of "Computer To Plate", which is a computer-to-plate technology. CTP technology adopts a digital workflow to convert text and images into numbers with laser scanning, and directly output them to the CTP plate to make a printing plate, which saves the material of film and the manual imposition process, and enables printing companies to enter a "digital world". ". The surface of the CTP plate is coated with a photosensitive resin layer. In order to protect the coating from damage during storage and transportation, it is necessary to line up a layer of protective paper between each CTP plate, which is called CTP plate paper. [0003] Chinese invention patent (application number: 201010018333.9 application date: 2010-01-14) discloses a production method of computer direct printing plat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H11/00D21H21/18
Inventor 张琦计皓刘佳文王晓琴沈国频
Owner ZHEJIANG KAIFENG NEW MATERIAL CO LTD