What are the quality control points in the production of heat-sensitive label paper?

The quality control points in the production of heat-sensitive label paper mainly include the following aspects:

First, raw material quality control

1.Thermal coating material selection: the selection of high-quality colorless dyes and appropriate adhesives to ensure that the thermal paper can quickly and clearly develop color after heating, and has good three anti-performance (waterproof, oil-proof, alcohol-proof).

2.Base paper quality: Base paper as the base of the thermal coating, its smoothness, air permeability, wet strength and other properties directly affect the quality of the final product. Therefore, it is necessary to select a base paper that meets the requirements to ensure the uniformity and adhesion of the coating.

Second, production process control

1.Coating process: Precise control of the amount of coating thermal sensitive coating, to avoid too much or too little resulting in uneven color or three protection performance decline. At the same time, pay attention to the uniformity and stability of the coating process.

2.Dry curing: After coating, the coating needs to be properly dried and cured to ensure that the coating is tightly bound to the base paper, while avoiding solvent residues in the coating to affect the quality of the product.

3.Slitting and packaging: In the slitting process, ensure that the size is accurate and the edge is neat; Packaging should avoid scratches, contamination and other problems to ensure the final appearance of the product quality.

Third, equipment maintenance and management

1.Production equipment: Regular maintenance of production equipment to ensure the normal operation and accuracy of the equipment. Especially the key equipment such as coating machine and dryer, the stability of its performance is directly related to the production quality of the product.

2.Environmental control: The production workshop should maintain appropriate temperature, humidity and cleanliness to reduce the impact of environmental factors on product quality.

Fourth, quality inspection and control

1.Online detection: Through the installation of online detection equipment, real-time monitoring of the production process parameters, such as coating thickness, drying temperature, etc., timely detection and correction of deviations.

2.Finished product inspection: strict quality inspection of the finished product, including color rendering effect, three defense performance, dimensional accuracy, appearance quality and so on. Sampling inspection shall follow certain sampling rules and be conducted in strict accordance with the standards.

3.Feedback and improvement: Establish a quality feedback mechanism, collect and deal with customer feedback in a timely manner, analyze the causes of problems found and take corresponding measures to improve them.

Fifth, personnel training and operation specifications

1.Personnel training: Regular training of production operators to improve their understanding and ability of production process, equipment operation, quality testing, etc.

2.Operation specifications: Formulate detailed production operation procedures and quality inspection standards, requiring operators to operate and inspect in strict accordance with the procedures and standards to ensure the stability and consistency of product quality.

In summary, the quality control points in the production of heat-sensitive label paper involve raw material selection, production process control, equipment maintenance and management, quality testing and control, as well as personnel training and operation specifications. Only by comprehensively controlling these points can we produce high-quality heat-sensitive label paper products.