Manufacturing process of intermittent coating release paper

A manufacturing process of intermittent coating release paper, comprising steps of:

• a) undercoating, wherein an undercoat layer is coated on two sides of an unrolled base material;
• b) primary drying in a drying oven, wherein drying the base material after the undercoating in a first drying oven;
• c) printing optical marks, wherein the base material passes between symmetrical upper and lower printing rollers, printing the optical marks at equal intervals, and wherein the optical marks are symmetrically distributed on both sides of the base material in the width direction;
• d) coating silicone oil in a section, wherein enabling optical mark tracking, after identifying optical mark, waiting for a duration time t1, and coating the silicone oil to a surface of base material for a duration time t2, and stopping coating silicone oil for a duration time t3 until the next identification to the optical mark, wherein t1=t3;
• e) accurately coating heat-sealing material on front and back sides of the base material in a section, wherein enabling the optical mark tracking, upon identifying the optical mark, the action of coating heat-sealing material to the front and back sides of base material is performed for a duration time t1, then stopping the application of the heat-sealing material for a duration time t2, and the next action of coating the heat-sealing material on the front and back sides is performed for a duration time t3;
• f) secondary drying, wherein the base material after coating heat-sealing material enters into a second drying oven, and is dried in a non-contact manner and then rolled up.