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Thermal paper manufacturing method capable of preventing mechanical pulp/ chemical mechanical pulp thermal paper from fading

A manufacturing method and technology of thermal paper, applied in paper, papermaking, paper coating, etc., can solve the problems of thermal image fading and acceleration

Inactive Publication Date: 2012-05-02
HENAN JIANGHE PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, it is not excluded that these complex functional groups in the mechanical pulp have a negative effect on the cleaved lactone ring in the dye
The re

Method used

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  • Thermal paper manufacturing method capable of preventing mechanical pulp/ chemical mechanical pulp thermal paper from fading
  • Thermal paper manufacturing method capable of preventing mechanical pulp/ chemical mechanical pulp thermal paper from fading
  • Thermal paper manufacturing method capable of preventing mechanical pulp/ chemical mechanical pulp thermal paper from fading

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 : A manufacturing method of thermal paper capable of preventing thermal paper containing mechanical pulp / chemical mechanical pulp from fading, using 2,4-bis(benzenesulfonyl)phenol as a color developer, and adopting a factory to produce wood pulp containing CTMP 30 %, 50g / ㎡ base paper made of 70% chemical wood pulp.

[0017] The formula and preparation method of pre-coating:

[0018] components number of copies Calcined kaolin 55 Organic hollow pigment 25 Carboxylated styrene-butadiene latex 7 Oxidized starch 7 Auxiliary 6

[0019] Among them, the auxiliary agent is a dispersant, etc., add water to the above components to prepare a coating dispersion with a solid content of 40%, and use a scraper for mixing and stirring to coat the base paper at a coating amount of 5-6g / ㎡, dry it with hot air, press Light spare.

[0020] The preparation of heat-sensitive paint: Amix: Bmix: Cmix=1:2:5.

[0021] Among them, Amix ...

Embodiment 2

[0031] Example 2: A method for manufacturing heat-sensitive paper capable of preventing heat-sensitive paper containing mechanical pulp / chemical-mechanical pulp from fading, using 2,4-bisphenol S as a color developer.

[0032] Except that 2,4-bis(benzenesulfonyl)phenol in Bmix was replaced with 2,4-bisphenol S as the developer, the rest were prepared according to Example 1 to prepare thermal paper for testing.

Embodiment 3

[0033] Example 3: A method for manufacturing heat-sensitive paper capable of preventing fading of heat-sensitive paper containing mechanical pulp / chemical-mechanical pulp, using 3,3-diallyl 4,4'-dihydroxyphenyl sulfone as a color developer.

[0034] Except that the 2,4-bis(benzenesulfonyl)phenol in Bmix was replaced with 3,3-diallyl 4,4`-dihydroxyphenyl sulfone as the color developer, the rest were prepared according to Example 1. Thermal paper, to be tested.

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Abstract

The invention discloses a thermal paper manufacturing method capable of preventing mechanical pulp/ chemical mechanical pulp thermal paper from fading. A phenolic compound of a phenyl sulfonyl or diphenyl sulfone structure is used as the thermal sensitive color development agent. Deep exploratory researches discover that the phenolic compound of the phenyl sulfonyl or diphenyl sulfone structure general formula has excellent function of preventing the mechanical pulp/ chemical mechanical pulp thermal paper from fading; and by using the phenolic compound of the phenyl sulfonyl or diphenyl sulfone structure general formula as the color development agent of a thermal sensitive recording layer, the purpose of preventing the thermal paper from fading can be fulfilled.

Description

technical field [0001] The invention belongs to the technical field of heat-sensitive paper, and in particular relates to a method for manufacturing heat-sensitive paper capable of preventing heat-sensitive paper containing mechanical pulp / chemical-mechanical pulp from fading. Background technique [0002] Since the industrialization of thermal paper in the 1970s, it has been greatly developed and widely used. Its fields cover commercial paper, office automation, communication fax, medical equipment, labels and lottery tickets. [0003] The basic composition of thermal paper is that the base paper is coated with a pre-coating layer and a thermal recording layer, and some high-end varieties must be top-coated. Its color development mechanism is that the phenolic acidic substance (chromogenic agent) as the electron acceptor and the leuco dye with the lactone ring structure as the electron donor, under the action of heat, the chromogenic agent changes from the leuco dye to ...

Claims

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Application Information

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IPC IPC(8): D21H19/82D21H21/28D21H19/46
Inventor 姜丰伟王文辉曾云
Owner HENAN JIANGHE PAPER
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