Knowledge of thermal cash register paper

February 28, 2025

1. Thermal paper concept

Thermal paper, also known as thermal recording paper, thermal copy paper, and thermal fax paper, was first developed by American 3M (MinesotaMiningInkCharacter) in 1951. Colorless dye two-component thermal paper is processed paper coated with a special coating. It is a carrier made of paper and the like. The recessive colorless dye, developer, sensitizer, adhesive, etc. are used as heat. Information paper for heat-sensitive recording effect of heat-induced color development composed of sensitive color-developing coating.

2. Use of thermal paper

The use of thermal paper mainly includes the following aspects: fax machines, communications, medical treatment, recording systems such as electrocardiographs, thermal instruments, computer network terminal printing, trademarks, signing (POS), etc., among which the use of fax machines most. With the rapid development of information technology, bill printer technology and bar code technology are widely used. Due to its unique performance, the advantages of rapid image generation and convenient bar code labels, thermal paper has grown rapidly in the field of bar code recording information and bill printing.

3. Classification of thermal paper

From the function, thermal paper can be divided into ordinary thermal paper and three-proof thermal paper. The three-proof thermal paper is coated with a protective layer on the heat-sensitive color developing layer to give the three-proof thermal paper better waterproof, oil-proof and anti-friction properties. It is mainly used in the high-end market.

From the structure, thermal paper is mainly divided into two categories. One is the physical thermal paper that uses heat to make the colored pigment physically form a recording effect. This type of thermal paper is further divided into melt transparent type, melt transfer and Sublimation type, etc., the representative of which is the molten transparent thermal paper, which is widely used in medical electrocardiograms and electroencephalograms; the other is to use a chemical reaction under the action of heat to achieve color development The chemical type thermal paper is the product with the largest amount on the market at present. This type of thermal paper is further divided into two-component metal compound chromogenic thermal paper and leuco dye two-component thermal paper.

4. Principle of thermal paper color development

The principle of color development of molten transparent thermal paper is to coat a layer of opaque wax on the black base paper as the surface layer. After the action of the thermal pen, the opaque wax-like material is melted and transparent, and the bottom layer of the base paper is exposed. image. The principle of color development of thermal paper developed by metal compounds is based on the combination of heavy metal salts of fatty acids and reducing agents. The temperature is increased by heating to melt the fatty acid salts and react with the reducing agents to reduce the heavy metals to free color. The color developing principle of leuco dye-type thermal paper is based on the mixing of leuco dyes containing internal alicyclic ring and the color developing agent. Under the action of heat, the color developing agent and the colorless dye react with heat to develop color.

Author:

Ms. Nicole Zhang

E-mail:

jhtm@gzjh.com.cn

Phone/WhatsApp:

+86 15920151471

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Guangzhou Jiuheng Barcode Co., Ltd. is a national technology enterprise with core competitiveness in variable barcode production, data processing, RFID, and drug regulatory code printing. It integrates variable barcode printing, color printing, table printing, anti-counterfeiting printing, bill processing, sticker printing, barcode consumables and equipment sales. The company was established in 2002 with a registered capital of 40 million yuan and more than 1000 employees. The company is headquartered in Panyu, Guangzhou, with a factory area of 30000 square meters and a construction area of over 50000 square meters. The company has subsidiaries including Guangzhou Jiuheng New Energy Co., Ltd., Guangzhou Hengjinbao Network Technology Co., Ltd., Shanghai Jiuheng Digital Technology Co., Ltd., Tianjin Hengjin Packaging Materials Co., Ltd., Hong Kong Jiuheng Digital Technology Co., Ltd., and Jianghua Jiuheng Digital Technology Co., Ltd. The company's annual sales revenue exceeds 1 billion yuan and is a leading enterprise in the domestic variable barcode printing industry. The company has successively passed ISO9001 quality management system certification and ISO14001 environmental...

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