Temperature-range false-proof non-carbon CF paper and producing method thereof

A carbon-free paper and temperature-changing technology, applied in papermaking, textiles and papermaking, fiber raw material processing, etc., can solve the problems of watermark and anti-counterfeiting fiber anti-counterfeiting strength that are difficult to fully meet customer requirements, etc.

Inactive Publication Date: 2008-10-29
GUANGDONG GUANHAO HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the passage of time, the anti-counterfeiting strength of watermark and anti-counterfeiting fiber has been difficult to fully meet the requirements of customers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Formulation of red temperature-changing CF coating (unit: kg / ton of paper):

[0036] Kaolin 40-60 Calcium Carbonate 20-40

[0037] Oxidized starch 10-20 Carboxymethyl cellulose 0.5-2

[0038] Sodium polyacrylate dispersant 0.5-1 Carboxylated styrene-butadiene latex 3-6

[0039] Carbon-free paper developer 10-30 Red colorless dye 0.1-1;

[0040] (2) Preparation of red colorless dye dispersion:

[0041] According to the following formula, use a ball mill to grind to obtain a dispersion with a volume average particle size of 1.0 μm,

[0042] Red colorless dye 100 parts

[0043] 100 parts of polyvinyl alcohol 10% solution (PVA-205 produced by Kuraray Corporation)

[0044] 100 parts of water;

[0045] (3) All raw materials are allocated according to the raw material formula, and processed according to the ordinary carbon-free CF paper coating production process.

[0046] All raw materials in the CF coating formula are available on the market;

[0047] The red dye...

Embodiment 2

[0049] (1) Formulation of black temperature-changing CF coating (unit: kg / ton of paper):

[0050] Kaolin 40-60 Calcium Carbonate 20-40

[0051] Oxidized starch 10-20 Carboxymethyl cellulose 0.5-2

[0052] Sodium polyacrylate dispersant 0.5-1 Carboxylated styrene-butadiene latex 3-6

[0053] Carbonless paper color developer 10-30 black colorless dye 0.1-1;

[0054] (2) Preparation of black colorless dye dispersion:

[0055] According to the following formula, use a ball mill to grind to obtain a dispersion with a volume average particle size of 1.0 μm,

[0056] Black colorless dye 100 parts

[0057] 100 parts of polyvinyl alcohol 10% solution (PVA-205 produced by Kuraray Corporation)

[0058] 100 parts of water;

[0059] (3) All raw materials are allocated according to the raw material formula, and processed according to the ordinary carbon-free CF paper coating production process.

[0060] The ingredients in CF coating formulations are commercially available.

[0061] ...

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Abstract

The invention belongs to the carbonless copy paper processing technology field, in particular to a temperature-changing anti-counterfeiting carbonless CF paper as well as the production method thereof. The temperature-changing anti-counterfeiting carbonless CF paper has the technical proposal that the common CF paper is added with a leuco dye, when the paper is heated to reach a certain temperature, the leuco dye is melted and is reacted with carbonless paper chromogenic reagent for color displaying, the paper is changed from white to other colors, thereby realizing the anti-counterfeiting purpose. The leuco dye adopted by the invention is usually a phthalide or fluorine compound containing the structure of a lactone ring. The leuco dye is colorless or pale under room temperature, if being contacted with acidic materials under a certain condition, the lactone ring in the structure is opened to form a conjugated-system, thereby displaying a color. If the leuco dyes with different functional group structures are reacted with acid, different colors such as blue, red, black, green, orange, yellow, etc. can be displayed usually, and rich display colors can be obtained through the cooperation of dyes displaying different colors.

Description

technical field [0001] The invention belongs to the technical field of carbonless copy paper processing, in particular to a temperature-changing anti-counterfeit carbonless CF paper and a production method thereof. Background technique [0002] Carbonless copy paper has been widely used in tickets, vouchers, securities, labels, etc. Due to its special purpose, users and management departments often require appropriate anti-counterfeiting functions to be added to the paper to prevent criminals from forgery. [0003] Anti-counterfeiting carbonless paper products currently on the market usually add anti-counterfeiting means to the carbonless paper base paper, and then coat and process to produce carbonless copy paper with anti-counterfeiting functions, such as watermark carbonless anti-counterfeiting fiber carbonless paper, etc. Watermarking is the use of equipment with corresponding patterns and texts (such as watermark rollers, watermark nets, semi-wet embossing rollers, etc....

Claims

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Application Information

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IPC IPC(8): D21H19/36D21H21/48
Inventor 黄阳旭王际德李臻奎明红唐宏磊
Owner GUANGDONG GUANHAO HIGH TECH
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