A kind of low air permeability ctp plate backing paper and preparation method thereof

A kind of gas and lining paper technology, which is applied in the field of low air permeability CTP plate lining paper and its preparation, can solve the problems of high air permeability of CTP plate lining paper, inability to adapt to automatic production lines, low air permeability, etc. The effect of folding and reducing air permeability

Active Publication Date: 2022-02-08
XIANHE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, with the advancement of science and technology and the innovation of equipment, automation and intelligence have gradually replaced manual ones. There have been many high-speed automatic production lines in China. Therefore, the CTP plate lining paper needs to have low air permeability, which can be sucked by the vacuum suction cup on the manipulator, and the CTP plate lining paper prepared by this preparation method has high air permeability, which cannot adapt to the current new automatic production line

Method used

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  • A kind of low air permeability ctp plate backing paper and preparation method thereof
  • A kind of low air permeability ctp plate backing paper and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Prepare a CTP plate backing paper by the following method:

[0049] (1) prepare polyhydroxyl hyperbranched polymer:

[0050] (1.1) Under the protection of an inert gas, drop the dimethylacetamide solution of pyromellitic dianhydride into the dimethylacetamide solution of 2,2'-dihydroxydipropylamine, fully react until the cyclic anhydride The characteristic peaks disappeared; after the reaction, toluene was added to precipitate the reaction product, filtered, and the filter residue was rotary evaporated to obtain the product; the mass ratio of the above-mentioned pyromellitic dianhydride to 2,2'-dihydroxydipropylamine was 1:4.1;

[0051] (1.2) Mix the product obtained in step (1.1), glyceric acid, and p-toluenesulfonic acid in a mass ratio of 1:400:8.02, add p-toluenesulfonic acid, and react at 160°C and 0.08kPa under the protection of an inert gas 4h; after the reaction is completed, add methanol to fully dissolve, add ether to precipitate the reaction product, filter,...

Embodiment 2

[0058] Prepare a CTP plate backing paper by the following method:

[0059] (1) prepare polyhydroxyl hyperbranched polymer:

[0060] (1.1) Under the protection of an inert gas, drop the dimethylacetamide solution of pyromellitic dianhydride into the dimethylacetamide solution of 2,2'-dihydroxydipropylamine, fully react until the cyclic anhydride The characteristic peaks disappeared; after the reaction, toluene was added to precipitate the reaction product, filtered, and the filter residue was rotary evaporated to obtain the product; the mass ratio of the above-mentioned pyromellitic dianhydride to 2,2'-dihydroxydipropylamine was 1:4.3;

[0061] (1.2) Mix the product obtained in step (1.1), glyceric acid, and p-toluenesulfonic acid in a mass ratio of 1:425:9.8, add p-toluenesulfonic acid, and react at 165°C and 0.05kPa under the protection of an inert gas 4.5h; After the reaction is finished, add methanol to fully dissolve, then add ether to precipitate the reaction product, fi...

Embodiment 3

[0068] Prepare a CTP plate backing paper by the following method:

[0069] (1) prepare polyhydroxyl hyperbranched polymer:

[0070] (1.1) Under the protection of an inert gas, drop the dimethylacetamide solution of pyromellitic dianhydride into the dimethylacetamide solution of 2,2'-dihydroxydipropylamine, fully react until the cyclic anhydride The characteristic peaks disappeared; after the reaction, toluene was added to precipitate the reaction product, filtered, and the filter residue was rotary evaporated to obtain the product; the mass ratio of the above-mentioned pyromellitic dianhydride to 2,2'-dihydroxydipropylamine was 1:4.6;

[0071] (1.2) Mix the product obtained in step (1.1), glyceric acid, and p-toluenesulfonic acid at a mass ratio of 1:450:11.27, add p-toluenesulfonic acid, and react at 170°C and 0.02kPa under the protection of an inert gas 5h; after the reaction is finished, methanol is added to fully dissolve, then ether is added to precipitate the reaction p...

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Abstract

The invention relates to the technical field of papermaking, and discloses a low air permeability CTP plate backing paper and a preparation method thereof. The raw materials of the CTP plate backing paper include softwood pulp, hardwood pulp, and polyhydroxy hyperbranched polymer; the mass ratio of the hardwood pulp to softwood pulp is 1:3~5; the polyhydroxy hyperbranched polymer The dosage is 1~1.5% of the total dry weight of softwood pulp and hardwood pulp. The CTP plate backing paper of the present invention has low air permeability, can be absorbed by vacuum suction cups, has high stiffness, and is not easy to be folded during the pick-and-place process, so it can better adapt to automatic paper pick-up by intelligent manipulators.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a low air permeability CTP plate backing paper and a preparation method thereof. Background technique [0002] Computer to plate (CTP) technology is a technology that directly converts graphic images into printing plates that can be printed on the machine through a computer. It is an imaging process of digital printing plates. It directly scans and records images with high-resolution CTP plates, reduces the number of image transfers, and significantly improves the quality of plate making and printing, and has been rapidly popularized in the past ten years. When the CTP plates are stacked, it is easy to cause interlayer friction and cause the photosensitive layer to be damaged. Therefore, when storing, a CTP plate backing paper (also known as material interval paper) will be lined between the CTP plates to prevent the CTP plates from being sensitive. Layers are worn. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/00D21H11/08D21F11/00D21H21/14D21H17/46D21H19/16C08G83/00
CPCD21H27/00D21H11/08D21F11/00D21H21/14D21H17/46D21H19/16C08G83/005
Inventor 毛学米王昱哲周晓光黄学英董金雨杨奎占
Owner XIANHE CO LTD
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