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Heat-sensitive paper and preparation method thereof

A technology of heat-sensitive paper and base paper layer, which is applied in papermaking, paper coating, textiles and papermaking, etc. It can solve problems such as barcodes, difficult to recognize text, difficult to recognize barcodes and graphics, thermal paper flooding, etc., to improve printing quality. effect, good printing performance and high temperature resistance, and the effect of inhibiting color development

Inactive Publication Date: 2019-03-05
GOLD HUASHENG PAPER SUZHOU IND PARK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the research and development process, the inventors of the present application found that most of the thermal papers currently used will be discolored at high temperatures, making the original printed barcodes and characters difficult to read, causing troubles in use, and some thermal papers with poorer high temperature resistance Good paper, usually when printing at low energy and high speed, there will be problems with difficult identification of barcodes and graphics

Method used

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  • Heat-sensitive paper and preparation method thereof
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  • Heat-sensitive paper and preparation method thereof

Examples

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preparation example Construction

[0034] See figure 2 , figure 2 It is a schematic flow diagram of an embodiment of the thermal paper preparation method of the present invention, and the method includes:

[0035] Step S101, providing base paper, pre-coated paint, color-developing paint and protective paint respectively;

[0036] Among them, in this embodiment, the order of providing the base paper, pre-coating paint, color developing paint and protective paint is not limited.

[0037] In step S102, the pre-coated paint, the color-developing paint, and the protective coating are sequentially coated on the surface of the base paper to form a pre-coating layer, a color-producing layer, and a protective layer sequentially covering the base paper layer to obtain a thermal paper.

[0038] The pre-coating paint is coated to form a pre-coating layer and directly covers the surface of the base paper; the chromophoric paint is coated to form a chromonic layer and covers the pre-coating layer; the protective coating is coated t...

Embodiment 1

[0064] 100 parts by mass of plastic pigment, 10 parts by mass of polyvinyl alcohol, and 10 parts by mass of styrene-acrylic latex are mixed and dispersed into a pre-coated paint with a solid content of 30%.

[0065] 36 parts by mass of 4,4'-dihydroxydiphenyl sulfone and 4 parts by mass of polyvinyl alcohol were mixed and dispersed into a dispersion with a concentration of 40%, and then ground to a particle size of 1.0 μm in a wet mill to obtain a dispersion of the developer liquid;

[0066] 36 parts by mass of diphenyl sulfone and 4 parts by mass of polyvinyl alcohol were mixed and dispersed into a dispersion with a concentration of 40%, and ground to a particle size of 1.0 μm in a wet mill to obtain a sensitizer dispersion.

[0067] 36 parts by mass of 2-(2-4-xylamino)-3-methyl-6-diethylaminofluoran and 4 parts by mass of polyvinyl alcohol were mixed and dispersed into a dispersion with a concentration of 40%. Grind in a grinder to a particle size of 1.0 μm to obtain a dye dispersi...

Embodiment 2

[0072] 100 parts by mass of plastic pigment, 10 parts by mass of polyvinyl alcohol, and 10 parts by mass of styrene-acrylic latex are mixed and dispersed into a pre-coated paint with a solid content of 30%.

[0073] 36 parts by mass of 4,4'-dihydroxydiphenyl sulfone and 4 parts by mass of polyvinyl alcohol were mixed and dispersed into a dispersion with a concentration of 40%, and ground in a wet grinder to a particle size of 1.5 μm to obtain a dispersion of the developer liquid;

[0074] 36 parts by mass of diphenyl sulfone and 4 parts by mass of polyvinyl alcohol were mixed and dispersed into a dispersion with a concentration of 40%, and ground to a particle size of 1.5 μm in a wet mill to obtain a sensitizer dispersion.

[0075] 36 parts by mass of 2-(2-4-xylamino)-3-methyl-6-diethylaminofluoran and 4 parts by mass of polyvinyl alcohol were mixed and dispersed into a dispersion with a concentration of 40%. Grind in a grinder to a particle size of 1.5 μm to obtain a dye dispersion...

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Abstract

The invention discloses heat-sensitive paper and a preparation method thereof, the heat-sensitive paper comprises a base paper layer, a pre-coating layer, a color development layer, a protection layer, the pre-coating layer, the color development layer and the protection layer are sequentially formed on the base paper layer; the pre-coating comprises a plastic filler and a first adhesive; the color development layer comprises a first filler, a color developing agent dispersion liquid, a sensitizer dispersion liquid, a dye dispersion liquid, a second adhesive and a first lubricant, wherein thecolor developing agent dispersion liquid, the sensitizer dispersion liquid and the dye dispersion liquid respectively contain a color developing agent, a sensitizer and a dye with the size of 1.0-2.0microns, and the heat-sensitive paper has good high-temperature resistance and printing performance at the same time.

Description

Technical field [0001] The invention relates to the technical field of papermaking, in particular to a thermal paper and a preparation method thereof. Background technique [0002] Thermal paper is a printing paper specially used for thermal printers and thermal fax machines. It has been widely used in communications, medical, logistics, and supermarkets. [0003] The thermal paper currently used can basically meet people's needs. However, the inventor of the present application discovered during the research and development process that most of the thermal papers currently used will be colored at high temperatures, which causes the original printed barcodes and texts to be difficult to recognize, causing troubles in use, and some of the high temperature resistance performance is relatively high. Good paper usually has the problem of difficult identification of bar codes and graphics when printing at low energy and high speed. Summary of the invention [0004] The technical proble...

Claims

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Application Information

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IPC IPC(8): D21H19/82
CPCD21H19/828
Inventor 胡晓春陈汉彬李娟
Owner GOLD HUASHENG PAPER SUZHOU IND PARK