The thermal paper coating machine line is a type of production line used to producing thermal paperjumbo roll .  Thermal paper is a special type of paper that is coated with a chemical that changes color when exposed to heat.  This chemical coating is usually made up of bisphenol A (BPA) or bisphenol S (BPS), and a developer that reacts with the BPA or BPS(BPA free) to produce the color change. 

The thermal paper coating machine line is a complicated manufacturing process that involves multiple stages.  The process typically begins with the production of the paper base, then coated with the thermal chemical coating.  The coating process includes the application of a thermal layer of chemical onto the surface of the base paper, followed by drying and curing to ensure that the coating is properly bonded to the paper. 

The thermal paper coating machine line is typically made up of several pieces of equipment, including the paper unwinding machine, coating unit,  drying oven, cylinder, calendar and a rewinding machine.  The paper unwinding machine feeds the paper base into the coating station, where the thermal coating is applied.  The coated paper then passes through the drying oven to remove residual moisture, and is then rewind onto a roll for storage and shipping. 

Thermal paper is used in a variety of applications, including cash registers, credit card machines(pos machine）, and other types of point-of-sale systems. 

Thereforethe thermal paper coating machine line is an important component of many manufacturing operations that produce thermal paper products.