Coating Roller Cleaning Method And Cleaning Agent

The coating roller used for dry compounding is usually cleaned with the glue tank and circulation pump after the daily work. (Except for 24-hour operation). It is difficult to completely remove the glue with ethyl acetate. A small amount of glue remains on the coating roller, and the plate will be blocked after a long time. When the operation is performed in the case of plugging, the amount of glue applied is reduced, which will lead to quality complaints such as poor appearance (foaming) and low peeling temperature.

In order to prevent the occurrence of such quality complaints, we should periodically use stripping (plate washing solution) to clean the coating roller to obtain a stable amount of coated cloth.

Steps:
1. The glue tank and coating roller are cleaned with ethyl acetate.

2. Place 3-4 films OPP, PET, CPP, LLDPE, etc. in the glue tank.)

3. While rotating the coating roller at a slow speed, apply the wash solution to the surface with a paint brush, and then leave it for 5-10 minutes.

4. Scrub the surface of the roller 2-3 times with a metal brush.

5. Wash the unwashed areas again with a brush.

6. Use 2-3L of ethyl acetate with a fine copper wire brush to remove the wash solution.

7. Remove one piece of ethyl acetate film from the bath containing the plate washing solution.

8. Then add about 10L of ethyl acetate in the tank to contact with the coating roller, and slowly rotate the coating roller, while washing with a metal brush and a wire cloth until clean.

9. Repeat operation 7 again.

10. Repeat the operation of 8 and 9 again (in order to completely remove the foreign matter.)

11. Prepare 3-5L of ethyl acetate, scrub it from the top of the coating roller, and scrub it with a wire.　

12. Scrub the coating roller with a clean dry return.

13. Take out the ethyl acetate in the tank and place the film on the pad.

14. The cleaning cycle should be determined according to the appearance of the product. Generally, cleaning once a week or 2 weeks is better.

Precautions:
1. Plate washing solution SP-751 is a strong acid solution. Rubber gloves, protective glasses and masks must be worn during operation.

2. The ethyl acetate used in steps 5-11 in the operating steps can still be used in steps 6-8 if it is restored to a state free of foreign matter.

3. The plate washer has a corrosive effect on metals. If the coating roller coated with the plate washing liquid is left for more than 1 hour, the chrome-plated coating roller may peel off, and the cleaning must be completed within 1 hour.