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Method capable of improving low temperature color development performance of carbonless copy paper

A carbonless copy paper, low temperature technology, applied in the field of papermaking, can solve problems such as difficult to meet the requirements of color development in severe cold areas, paint flocculation, etc., to achieve the effect of improving the color development rate and performance at low temperature

Inactive Publication Date: 2015-12-30
GOLD HUASHENG PAPER SUZHOU IND PARK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN201110257626.7 discloses that adding a lithium compound in the preparation process of the developer emulsion or directly in the CF coating preparation process can rapidly increase the color development speed of the developer or CF coating at low temperature and normal temperature, but if the metal salt is treated Improper use may cause paint flocculation
[0004] Although the above patents or documents have improved the low-temperature color development performance, it is still difficult to meet the color development requirements in severe cold regions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] According to the mass parts, a CF coating formula that can improve low-temperature color development of carbonless copy paper is: China clay: 50 parts; precipitated calcium carbonate: 45 parts; precipitated silica: 5 parts; zinc salicylate resin: 20 parts; SBR latex: 10 parts; coating starch: 6 parts; polyamide polyurea epichlorohydrin: 0.8 parts; sodium hydroxide 0.3 parts.

[0018] Add each raw material in sequence according to the above formula, and disperse at high speed to obtain a uniform coating.

Embodiment 2

[0020] A CF coating formula that can improve low-temperature color development of carbonless copy paper is: china clay: 50 parts; precipitated calcium carbonate: 40 parts; precipitated silica: 10 parts; zinc salicylate resin: 20 parts; styrene-butadiene latex: 10 parts parts; coating starch: 6 parts; polyamide polyurea epichlorohydrin: 0.8 parts; sodium hydroxide 0.3 parts.

[0021] Add each raw material in sequence according to the above formula, and disperse at high speed to obtain a uniform coating.

Embodiment 3

[0023] A CF coating formula that can improve low-temperature color development of carbonless copy paper is: china clay: 50 parts; precipitated calcium carbonate: 40 parts; calcined kaolin: 5 parts; plastic pigment: 5 parts; zinc salicylate resin: 20 parts; Benzene latex: 10 parts; coating starch: 6 parts; polyamide polyurea epichlorohydrin: 0.8 parts; sodium hydroxide 0.3 parts.

[0024] Add each raw material in sequence according to the above formula, and disperse at high speed to obtain a uniform coating.

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PUM

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Abstract

The invention discloses a method capable of improving the low temperature color development performance of carbonless copy paper. According to the method, when CF coating is prepared, materials of high oil adsorption values are used in filling materials. When microcapsules are fractured, color oil flows out, the materials of high oil adsorption values can absorb the color oil instantly, so that colorless dye makes contact and reacts with color developing agents rapidly, the materials of high oil absorption values can serve as a good carrier of the chemical reaction, time which is needed for the color oil in the microcapsules to flow out and make contact with the color developing agents is shortened, and the low temperature color development performance of the carbonless copy paper is improved obviously.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for improving the low-temperature color development performance of carbonless copy paper. Background technique [0002] Carbonless copy paper (NCR) is generally composed of three paper sheets, namely upper paper (CB paper), middle paper (CFB paper) and lower paper (CF paper). The main component of CB coating on the upper paper is microcapsules; Or the main component of the CF coating on the paper is the color developer. The impact pressure during writing or printing can crush the microcapsules, causing the chromogen to flow out and contact the chromogen, and a chemical reaction occurs to present colored graphics, thereby achieving the purpose of copying. [0003] In cold regions, most carbonless copy papers have the problem of slow color development. In response to this problem, domestic manufacturers have also optimized raw materials or coating formulations, espec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/38D21H19/40D21H19/42D21H19/44D21H21/14
Inventor 丁力陈汉彬李娟周晶
Owner GOLD HUASHENG PAPER SUZHOU IND PARK