How to solve after printing sticky pages?-Iota

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Service > How to solve after printing sticky pages?

How to solve after printing sticky pages?

Screen printed in the accumulation process, will cause adhesion failure between the sheets, also known as sticky page faults. Adhesion phenomenon causes print quality problems, and even scrapped. The main reason for the occurrence of sticking two phenomena are the following:
① After printing, the printing ink drying is not sufficient. When the ink is not dry, it will be printed stacked pile, resulting in dirty and sticky adhesion phenomenon.
② screen printing ink composition of the material of choice is the cause of the improper adhesion between prints. When the softening point of the synthetic resin film of the ink substance or ink is relatively low volatility is not good, the adhesion phenomenon occurs. Typically evaporative drying type ink used was a thermoplastic resin, the resin has poor heat resistance. If the solvent remains in the printing ink film, the ink film will soften, resulting in a print adhesion. Especially in the summer, due to relatively high temperatures can easily cause adhesion phenomenon between the printed matter.
③ printing ink to the substrate has a certain dissolution, it will also cause adhesions between print. The solvent used in the printing, some of the solvent solubility of the substrate greatly. After printing, the ink on the substrate surface dissolves a certain amount, then although the ink surface has been dried, but the contact with the substrate portion of the ink is still wet, sticky both phenomena occur under gravity stacked. The substrate is a soft vinyl material, the material was printed vinyl plasticizer film transfer portion to the ink, causing ink film to soften, will lead to the occurrence of the adhesion phenomenon.
④ To prevent adhesion phenomenon, we must first choose suitable ink printing materials, solvents. Second, the choice of ink dry faster, pay attention to fully dry. Operate strictly according to process requirements. Generally prone glossy ink adhesion, pay attention.
⑤ scraper blades become worn, the Ministry of cylindrical-shaped knife, scrape cited resulting ink film thickness, or printing pressure is too large, the ink film thickness, will lead to adhesion failure.
The answer Source: China Screen Printing Special Indian network

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