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Coating for carbon-free paper with developer layer and use thereof

A technology of carbonless copy paper and color developer, used in paper coatings, pigmented coatings, papermaking, etc., can solve the problems of high surface tension, poor paint runnability, and high viscosity, and achieve low dynamic surface tension and good coating effect. , The effect of uniform coating thickness

Active Publication Date: 2009-03-11
JIANGSU KANGAITE ENVIRONMENTAL ENG GRP CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] At present, the carbonless copy paper CF layer coating that is common in the market has high dynamic surface tension, poor stretchability of the coating when it runs with the paper at high speed, poor stability of the coating curtain, and the calcium carbonate in the formula has a coarse particle size and a wide particle size volume distribution, and the coating has poor runnability. , high viscosity, many bubbles, slow color development, low color density, can not meet the requirements of high-speed curtain coating, and the proportion of use is generally lower than kaolin
[0006] The preparation method and application of light calcium carbonate for carbonless copy paper coating mentioned in Chinese patent CN101113004A, CN101113007A, CN101113008A, but there is no application of light calcium carbonate for carbonless copy paper coating in CF layer coating in the prior art, Especially in the application of carbonless copy paper CF layer curtain coating

Method used

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  • Coating for carbon-free paper with developer layer and use thereof
  • Coating for carbon-free paper with developer layer and use thereof
  • Coating for carbon-free paper with developer layer and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8， comparative Embodiment 1

[0036] The coating formula is shown in Table 1, all are mass proportioning %

[0037]

[0038] Among them: light calcium carbonate is special light calcium for carbonless copy paper produced by Shanghai Dongsheng New Material Co., Ltd. with the brand name DS-CFPCC;

[0039] The latex is the propylbenzene latex of the brand name DA-SA821 produced by Shanghai Dongsheng New Material Co., Ltd.;

[0040] The composite dispersant is composed of sodium polyacrylate with a mass solid content of 42% (the product produced by Shanghai Dongsheng New Material Co., Ltd. with the brand name DS-FS 551), sodium hexametaphosphate and sodium tripolyphosphate. The mass ratio is 6:2:2;

[0041] Kaolin is the kaolin of Polygloss 90 produced by U.S. Huber Engineered Materials (Huber Engineering Materials Company);

[0042] The starch is the cassava modified starch of HQ-2 provided by Beihai Haoxing Trading Co., Ltd.;

[0043] The color developer is the resin color developer of Ruifeng Chemical...

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Abstract

The invention discloses a painting containing a reagent layer for carbonless paper and application thereof. The painting comprises the following compositions in weight portion: 10 to 100 portions of lightweight calcium carbonate, 0 to 90 portions of kaolin, 5 to 20 portions of starch, 10 to 30 portions of rubber latex, 10 to 60 portions of a reagent, 0.2 to 5 portions of a composite dispersant and 50 to 80 portions of water. The formula of the carbonless paper CF layer painting adopts the lightweight calcium carbonate with thin and even particle diameter; in the formula, the composite dispersant is used to ensure that the prepared painting has low viscosity, few bubbles and low stress on the dynamic surface; coating paper is applied to ensure rapid chromogenic speed, high chromogenic density, high white content, even hue, good coating quality and uniform thickness of the coating layer, is suitable for the requirements on high-speed curtain coating and has good coating effect.

Description

technical field [0001] The invention relates to a coating used for a layer containing a developer of carbonless copy paper. Background technique [0002] Carbonless copy paper can be divided into two types: other color development and self-development color. The most used is other color development carbonless copy paper, which is generally composed of three paper sheets, namely upper paper, middle paper and lower paper. Upper paper is also called back-coated paper (code name CB, namely Coated Back), the back of the paper is coated with microcapsules containing Limin pigment oil; middle paper is also called front and back double coated paper (code name CFB, namely Coated Front and Back), paper The front side of the paper is coated with a color developer, and the back is coated with microcapsules containing Limin pigment oil; the lower paper is also called surface-coated paper (code name CF, that is, Coated Front), and the paper surface is only coated with a color developer. ...

Claims

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Application Information

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IPC IPC(8): D21H19/44D21H19/38
Inventor 施晓旦王晨王彦华
Owner JIANGSU KANGAITE ENVIRONMENTAL ENG GRP CO LTD
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