Plastic products have a lot of life. Many manufacturers of plastic products may need screen printing and then come out with better-looking plastic products. The problem that will be encountered is what preparations need to be made before printing plastic products. How to deal with them?
Maishi experts tell you that you need to pay attention to the degreasing treatment, dust removal treatment, and improve the printability of plastic products.
1. Improve the printability of plastic products. Appropriate surface treatment methods should be selected according to different plastics and process requirements: For example, PE, PP non-polar plastics can be treated by flame or corona; polyester plastics contain benzene rings, which have high optical activity and can be treated with ultraviolet light. Nylon can be treated with phosphoric acid to improve the printability of screen printing of plastic products.
2. Dust removal treatment. The presence of dust affects both the adhesion of the ink on the plastic product and the effect of screen printing. Surfactant washing can remove dust and static electricity, but there is the possibility of dust during drying.
3. Degreasing treatment. The surface of the plastic product is stained with oil, which will affect the adhesion of the ink. It can be passed through an alkaline aqueous solution, a surfactant, and a solvent.
Wash and sandpaper to achieve the purpose of surface cleaning and degreasing.
The advice given by maishi technical experts is the above. Plastic products must remember the surface treatment before screen printing. If not processed, it will affect the final product.