thermal paper printing principle and characteristics
August 25th, 2009 by lostsky123451 thermal paper structure
Thermal paper is in general the glazed printing paper surface coating layer coating, thermal colorless thermal coated by couplers, mainly colour-display reagent and thickening agent of feeling. Used for thermal paper researches, general condition is colorless or light stability powder, under certain conditions (heat) hair color. Thermal chromogenic reagents function in response to couplers and overses ester ring into resonance SeJi hair, requirement in water solubility, melting, and are good biocompatibility. Containing hydroxyl acid is generally. Sensitized agent while itself does not participate in the chromogenic reaction, but one with a solvent such as control function.
2) thermal paper printing principle and characteristics
When printing paper with summing the print head in a series, avoids the constantly changing hot spots, under the action of thermal papers are hot parts are not hot black, no color. Thus forming words or bar code, printing purposes. Thermal paper is divided into layer and layer in thermal protection, two layer above, the purpose of which is to protect heat-sensitive layer corrosion-resistant, prevent pollution, and protect the print head tags. Relative to the heat transfer paper, thermal paper strengths will be without the ribbon of variable information to print documents surfaces. Due to thermal heat transfer paper paper itself low prices, print and not to use the ribbon printing costs, relatively cheap. Thermal coating can be set to activate different temperatures and color, in order to adapt to the needs of different properties of printer. The paper in print information to thermal stability and reversible, namely, the temperature and humidity in print to thermal paper information will become blurred. In addition, light, chemical corrosion in the environment and a stain on the thermal paper fuzzy information will become even some heat-sensitive material surface protective coating is printed thermal paper label, also had better not be stored for its more than six months. Another due to thermal paper printing paper with the print head when direct contact with the print head, to wear to heat transfer in high-speed printers, paper particularly on this phenomenon.