Label machine printing paper The manufacturing of thermal paper generally includes the following steps:
Label machine printing paper Base paper selection
Select high-quality paper as the base material, usually made of wood pulp paper or recycled paper fiber, which is required to have high flatness, strength, smoothness and low air permeability, and no pinholes, to ensure the printing effect and performance of thermal paper.
Label machine printing paper Coating preparation
Label machine printing paper Prepare raw materials: Prepare the raw materials for thermal coating, the main components include colorless dyes (such as fluorane compounds, etc.), color developers (such as bisphenol A, parabens, etc.), sensitizers (such as benzenesulfonic acid amide compounds), fillers (such as calcium carbonate particles), adhesives (such as polyvinyl acetate), stabilizers (such as diphenyl terephthalate) and lubricants, etc.
Mixing and stirring: These raw materials are accurately weighed according to specific formulas and proportions, and then put into the stirring equipment for thorough mixing and stirring to form a uniform thermal coating.
Label machine printing paper Coating coating
Label machine printing paper The prepared thermal coating is evenly coated on the surface of the base paper by roller coating, spraying or blade coating. During the coating process, the thickness and uniformity of the coating need to be precisely controlled. Generally, the coating thickness ranges from a few microns to tens of microns.
Label machine printing paper Drying and curing
Drying treatment: After coating, the paper enters the drying stage. It can be dried naturally, dried in an oven or dried with hot air to remove moisture from the paper, so that the chemical substances in the thermal coating can be better combined with the paper, and the solvent in the coating can be volatilized to cure the coating.
White label printing thermal paper Curing reaction: While drying, the chemical substances in the coating will undergo a certain curing reaction, further improving the stability and performance of the coating, so that the thermal paper can achieve the best printing effect.
White label printing thermal paper Inspection and packaging
White label printing thermal paper Quality inspection: A comprehensive quality inspection is carried out on the manufactured thermal paper, including checking whether the appearance of the paper has defects, whether the coating is uniform, whether the thermal performance is good, etc., and also checking the clarity of the handwriting after printing, preservation performance and other indicators.
White label printing thermal paper Cutting and packaging: The qualified thermal paper is cut into rolls or sheets according to the required size and specifications using cutting equipment. Finally, the cut thermal paper is packaged in paper boxes, plastic bags, etc. for storage and transportation.
