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A method for improving the low-temperature and room-temperature color performance of carbonless copy paper

A carbonless copy paper, low temperature technology, applied in the field of improving the color rendering performance of carbonless copying paper at low temperature and normal temperature, and improving the color rendering performance of carbonless copying paper, can solve the problems such as slow color development speed, difficulty in meeting use requirements, application restrictions, etc. The effect of increasing the color development speed and improving the color optical density

Inactive Publication Date: 2011-12-14
湛江市丽科有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As we all know, the active clay-type color developer (I) has faded out of the market; although the phenolic resin-type color developer (II) has a good saturation optical density, it has poor color performance and slow color development speed in low temperature environments. Weaknesses, so that its application in cold seasons or northern regions has been greatly restricted; zinc salicylate resin developer (Ⅲ) and phenolic and zinc salicylate mixed / combined resin developer (Ⅳ), The color rendering performance in low temperature environment and the color development speed at room temperature have been improved to some extent, but it is still difficult to meet the use requirements in cold regions and winter seasons

Method used

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  • A method for improving the low-temperature and room-temperature color performance of carbonless copy paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A

[0026] Example 1A Preparation of Zinc Salicylate Resin Developer (Ⅲ) Emulsion Containing Lithium Chloride

[0027] Add 200 parts of solid zinc salicylate resin developer (Ⅲ), 0.5 parts of emulsifier, 1 part of lithium chloride, and 150 parts of water into the emulsification tank, heat up to 95 ° C, stir for 30 minutes, emulsify, and cool to 40 ℃, make zinc salicylate resin developer emulsion, and set aside.

[0028] Take the above-mentioned color developer emulsion to prepare CF coating, and the formula composition is as follows:

[0029] CF formula composition Servings

[0030] Zinc salicylate resin developer (Ⅲ) (containing 0.5% lithium chloride) 14.0*

[0031] Kaolin 33.5

[0032] Calcium carbonate 33.5

[0033] Oxidized starch 9.8

[0034] Hydroxybutadiene Latex 6.0

[0035] water 105.0

[0036] *Contains 0.07 parts of lithium chloride

Embodiment 1B

[0038] The amount of lithium chloride added in Example 1A is increased from 1 part to 2 parts (lithium chloride in the resin developer is increased to 1%), and other conditions are the same as Example 1A, emulsification is made into developer emulsion, and then Take the above-mentioned developer emulsion, and prepare CF coating according to Example 1A, wherein lithium chloride is 0.14 parts.

Embodiment 2

[0039] Example 2 Preparation of Activated Clay Color Developer (I) Containing Lithium Hydroxide

[0040] Take 200 parts of activated clay (I), 2 parts of lithium hydroxide, 1 part of dispersant, 50 parts of PVA solution (10%), and 150 parts of water, put them in a grinder and grind for 30 minutes, take them out for use.

[0041] Take the above-mentioned activated clay color developer (I) to prepare CF coating. Formula composition except that the color developer containing activated clay and lithium hydroxide is used to replace the zinc salicylate resin color developer in Example 1B, the rest of the composition and dosage are the same as in Example 1B, and the color developer contains lithium hydroxide 1%, which is equivalent to 0.14 parts of lithium hydroxide in the formula.

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Abstract

The invention discloses a method for improving the low-temperature and normal-temperature color development performance of carbonless copy paper, which belongs to the technical field of carbonless copy paper. The method is characterized in that a lithium compound is added during the preparation of the color developer emulsion or directly in the color developer emulsion , or add a lithium compound in the CF coating preparation process, the addition amount is 0.01-20% of the color developer, by introducing lithium compound can quickly improve the color development speed of the color developer or CF coating at low temperature / normal temperature, and also It can correspondingly improve the final color optical density of carbonless copy paper; different types of color developers, different lithium compounds and different dosages have different performances.

Description

technical field [0001] The invention relates to a method for improving the color rendering performance of carbonless copy paper, in particular to a method for improving the low temperature and normal temperature color rendering performance of carbonless copy paper, and belongs to the technical field of carbonless copy paper. Background technique [0002] Carbonless copy paper consists of upper paper (CB) containing microcapsules of leuco dyes (such as CVL, ODB, etc.), and lower paper (CF) or middle paper (CFB) containing developer components. The CF coating on the bottom paper or middle paper is mainly composed of color developers (inorganic or organic), pigments (calcium carbonate, kaolin, etc.), binders (starch, latex, PVA, etc.) and other additives. It is a color developer. Its color development principle is that when the back of CB paper is superimposed on the front of CF paper or CFB paper, it is squeezed by external force (by handwriting or printing device), so that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/63
Inventor 林德森林树森林晓
Owner 湛江市丽科有限公司
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