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Thermosensitive color-changing anti-counterfeiting coating white cardboard and producing method thereof

A technology of heat-sensitive discoloration and white cardboard, applied in the field of papermaking, can solve the problems of limited application range and inability to directly identify true and false, and achieve good anti-counterfeiting effects

Inactive Publication Date: 2013-09-25
ZHUHAI S E Z HONGTA RENHENG PAPER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The anti-counterfeit paper disclosed in the above-mentioned patent application needs to be coded according to the type and combination, color and combination, and quantity of the added anti-counterfeit inserts, and the code should be printed on the paper in the form of lead printing, mimeograph or watermark; The disadvantage is that the authenticity cannot be directly identified, and it needs to be assisted by printed codes. It is mainly used for bills, official documents, certificates and other papers, and the scope of use is limited.

Method used

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  • Thermosensitive color-changing anti-counterfeiting coating white cardboard and producing method thereof
  • Thermosensitive color-changing anti-counterfeiting coating white cardboard and producing method thereof
  • Thermosensitive color-changing anti-counterfeiting coating white cardboard and producing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Surface pulp: wood pulp (weight percentage: 70% bleached hardwood kraft pulp, 30% bleached softwood kraft pulp), crushed and mixed by a pulper, refined by a disc refiner, and enter the surface of the paper machine net filter.

[0062] Core layer pulp: wood pulp (percentage by weight: bleached hardwood kraft pulp 50%, bleached softwood kraft pulp 10%, broken paper 40%), crushed and mixed by pulper, refined by disc refiner , into the paper machine core mesh filter.

[0063] Bottom pulp: wood pulp (weight percentage: 90% bleached hardwood kraft pulp, 10% bleached softwood kraft pulp), crushed and mixed by a pulper, refined by a disc refiner, and enters the surface wire of the paper machine filter.

[0064] In the spraying starch between the surface and the core layer, the percentage by weight of the red heat-sensitive discoloration powder added is 0.02%.

[0065] Then, a three-layer laminated wire is formed by a paper machine to produce a wet paper sheet with a surface ...

Embodiment 2

[0073] Surface layer pulp: wood pulp (weight percentage: 80% bleached hardwood kraft pulp, 20% bleached softwood kraft pulp), crushed and mixed by a pulper, refined by a disc refiner, and enter the surface of the paper machine net filter.

[0074] Core layer pulp: wood pulp (weight percentage: bleached chemical thermomechanical pulp 70%, bleached softwood kraft pulp 5%, broken paper 25%), crushed and mixed by pulper, refined by disc refiner , into the paper machine core mesh filter.

[0075] Bottom pulp: wood pulp (percentage by weight: bleached hardwood kraft pulp 70%, bleached softwood kraft pulp 30%), crushed and mixed by a pulper, refined by a disc refiner, and enter the surface wire of the paper machine filter.

[0076] In the starch sprayed between the core and the bottom layer, the percentage by weight of the blue heat-sensitive discoloration powder added is 0.08%.

[0077] Then, a three-layer laminated wire is formed by a paper machine to produce a wet paper sheet w...

Embodiment 3

[0085] Surface pulp: wood pulp (weight percentage: 90% bleached hardwood kraft pulp, 10% bleached softwood kraft pulp), crushed and mixed by a pulper, refined by a disc refiner, and enter the surface of the paper machine net filter.

[0086] Core layer pulp: wood pulp (weight percentage: 70% bleached chemical thermomechanical pulp, 30% broken paper), crushed and mixed by a pulper, refined by a disc refiner, and filtered into the paper machine core net.

[0087] Bottom pulp: wood pulp (weight percentage: 80% bleached hardwood kraft pulp, 20% bleached softwood kraft pulp), crushed and mixed by a pulper, refined by a disc refiner, and enters the surface wire of the paper machine filter.

[0088] Then, a three-layer laminated wire is formed by a paper machine to produce a wet paper sheet with a surface layer 103, a core layer 102 and a bottom layer 101. The wet paper sheet is dried by a paper machine and the surface is sized to obtain a base paper.

[0089] Then, coating: a prec...

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Abstract

The invention discloses a thermosensitive color-changing anti-counterfeiting coating white cardboard and a producing method thereof. The thermosensitive color-changing anti-counterfeiting coating white cardboard comprises a base paper and a coating layer. The base paper comprises a surface layer, a core layer and a bottom layer, and the surface layer, the core layer and the bottom layer are sequentially stacked. Starch is sprayed on the interlamination between the surface layer and the core layer and between the core layer and the bottom layer.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a heat-sensitive color-changing anti-counterfeiting coated white cardboard and a production method thereof. Background technique [0002] Generally, the anti-counterfeiting of packaging paper has barcode anti-counterfeiting, printing anti-counterfeiting and other technical measures, but with the development of various new technologies such as high-precision scanning and printing, computer graphics processing technology, digital printing technology, etc., the original anti-counterfeiting measures are easily invalidated. . Embedded anti-counterfeiting on the base paper substrate is the development direction of packaging paper anti-counterfeiting technology. [0003] Nowadays, embedding anti-counterfeiting on the base paper substrate is the development direction of packaging paper anti-counterfeiting technology. For example, the Chinese invention patent application with the ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/36D21H15/10D21H19/14D21H21/48
Inventor 季向东吴义荣张东生刘丽图刘海滨管鸣
Owner ZHUHAI S E Z HONGTA RENHENG PAPER