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Anti-counterfeiting pearlescent pigment coated white cardboard and preparation method thereof

A pearlescent pigment, cloth white cardboard technology, applied in pigment-containing coating, coating, papermaking, etc., can solve the problems of low retention rate, uneven distribution, low retention rate of pearlescent pigments, etc., to improve the retention rate. High efficiency, easy identification, obvious and beautiful effect of anti-counterfeiting marks

Inactive Publication Date: 2014-01-01
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the flaky structure, surface electronegativity and large specific gravity of pearlescent pigments, if they are added to paper or the surface of paper by simple mixing, the retention rate of pearlescent pigments in paper will be low and the distribution on paper surface will be poor. Technical quality problems such as uniformity and poor bonding with paper fibers
The low retention rate leads to the need to add more pearlescent pigments and the loss of pearlescent pigments will affect the paper machine making system; uneven distribution will also lead to the use of more pearlescent pigments, which will increase the cost; poor bonding with paper fibers means pearlescent pigments are easy to It falls off from the paper surface, affecting the anti-counterfeiting effect and the quality of the paper
[0006] At present, the use of pearlescent pigments for anti-counterfeiting coated white cardboard has not been disclosed or reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] For single-side coated white cardboard: choose pearlescent pigment with an average particle size of about 5 microns, and the amount of pearlescent pigment is 0.0001g / m 2 . The chemical pretreatment method of pearlescent pigment is to add 100 parts of water and 1.2 parts of carboxymethyl cellulose in the pretreatment tank according to the mass parts, and then add 1 part of pearlescent pigment and 0.02 part of sodium tripolyphosphate after being dissolved and dispersed, and stir at room temperature for 90 Minutes; the way of adding pearlescent pigments is to mix the pretreated pearlescent pigment suspension measured according to the dosage requirements with the quantitative surface sizing agent, and then implement surface sizing on the bottom (reverse) surface. Effect test: under a strong point light source, evenly distributed fine particle bright spots of pearlescent pigments can be vaguely seen on the bottom (reverse) surface of the paper; the bonding strength of pearle...

Embodiment 2

[0034] For double-sided coated white cardboard: the average particle size of the pearlescent pigment is selected to be about 2000 microns, and the amount of pearlescent pigment is 0.2g / m 2 . The chemical pretreatment method of pearlescent pigments is to add 100 parts of water and 1.5 parts of quaternary ammonium cationic starch to the pretreatment tank according to the mass fraction, heat up to 90°C for gelatinization, and then add 1 part of pearlescent pigment and hexabia 0.01 part of sodium phosphate, stirred at residual temperature for 60 minutes; the addition method of pearlescent pigment is to add the pretreated pearlescent pigment suspension measured according to the consumption requirement to the bottom layer slurry forming tank, and use the agitator in the slurry forming tank to The pearlescent pigment is evenly mixed with the bottom layer paste, and then combined with the core layer and surface layer according to the papermaking process to complete the production proc...

Embodiment 3

[0036] For double-sided coated white cardboard: the average particle size of the pearlescent pigment is about 450 microns, and the dosage of the pearlescent pigment is 0.02g / m 2 . The chemical pretreatment method of pearlescent pigment is to add 100 parts of water and 1 part of carboxymethyl cellulose in the pretreatment tank according to the mass parts, and then add 1 part of pearlescent pigment and 0.01 part of sodium hexametaphosphate after dissolving and dispersing, and stir at room temperature for 50 Minutes; the pearlescent pigment is added in the process of preparing the bottom (reverse) surface top coat coating, adding the pretreated pearlescent pigment suspension measured according to the amount required to prepare the bottom (reverse) surface top coat coating, and implementing Bottom (reverse) surface top coat. Effect test: the pearlescent pigment particles can be clearly seen on the bottom (reverse) side of the paper; the average number of pearlescent pigment parti...

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Abstract

The invention discloses an anti-counterfeiting pearlescent pigment coated white cardboard and a preparation method thereof. Visible pearlescent pigments are uniformly distributed on the bottom surface of the anti-counterfeiting pearlescent pigment coated white cardboard disclosed by the invention. The pearlescent pigments after chemical pretreatment are added into a coating material or a surface sizing agent or a bottom paste, and the bottom surface of the coated white cardboard can form an anti-counterfeiting pearlescent pigment mark by virtue of coating operation or surface sizing operation or papermaking process. Through pretreatment of the pearlescent pigments, the anti-counterfeiting pearlescent pigment coated white cardboard disclosed by the invention can solve the technical quality problems of low retention rate of the pearlescent pigments, non-uniform distribution, poor binding force and the like; the visible pearlescent pigments are uniformly distributed on the bottom surface of the anti-counterfeiting pearlescent pigment coated white cardboard disclosed by the invention, a multi-color tiny spot-like pearlescent visual effect can be achieved according to different series of the pearlescent pigments, and the anti-counterfeiting mark is formed and is obvious and aesthetic, so that the anti-counterfeiting effect of the coated white cardboard can be achieved; the coated white cardboard is prepared mainly based on an existing coating device or a surface sizing device or a papermaking device in a production process flow, and the cost is low.

Description

[0001] Technical field [0002] The present invention involves anti -counterfeiting white card paper, which specifically involves a pearl pigment anti -counterfeit cloth white card paper and its preparation method. Background technique [0003] The anti -counterfeiting technology of coating white card paper is mainly to disperse the entire -cut color fiber with water. Choose the segment of the pulp section or the bottom layer (or core layer) of the bottom (or core layer) segment (or core layer).In the middle, and make it dispersed evenly, get the underlying (or core layer) slurry, and then send it to the paper machine and the surface layer to form it to form a anti -counterfeiting white card paper with color fiber evenly distributed with color fibers.This technology provides a small investment, suitable for anti -counterfeit cloth white card paper and its production process for general product packaging.The anti -counterfeiting technology of color fibers is to add a small amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/38D21H19/52
Inventor 袁世炬付建生
Owner HUBEI UNIV OF TECH
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