1. The product has wrinkles
(1) The pressure of the rubber roller is too high, resulting in membrane deformation, so the pressure should be reduced appropriately.
(2) The rubber roller surface is damaged and uneven. Replace the rubber roller.
(3) The pressure imbalance between the rubber roller and the heating roller shall be properly adjusted.
(4) If the tension on both sides of the film is inconsistent, or the edge is corrugated, the film material shall be replaced.
2. Snowflakes appear on the product
(1) The pressure of the rubber roller is insufficient, so the pressure should be increased appropriately.
(2) The incomplete melting of glue on the pre coating can be solved by the following methods.
① Properly increase the paint film temperature.
② Increase the contact area between the film and the heating roller, and increase the heating and melting degree of the adhesive on the film at the same speed.
③ Reduce the coating speed.
(3) Dust and impurities on the pre coated adhesive surface shall be removed in time.
3. The adhesion is not strong and the film is peeled off
(1) If the shelf life of the pre coating exceeds the shelf life, please replace it with a new one.
(2) If the ink layer of the printed matter is not dry, the drying time of the printed matter should be extended, especially when laminating special printed matter.
(3) Low lamination pressure, high speed and low temperature. The lamination pressure can be appropriately increased, the lamination speed can be reduced, and the lamination temperature can be increased.
4. Curl the product after cutting
(1) If the tension of the film is too large, it will lead to stretching and deformation of the film. Adjust the tension screw of the film.
(2) If the winding tension is large, resulting in the deformation of film and paper at the same time, the winding tensioning mechanism should be adjusted.
(3) The environmental humidity is high, and the humidity of the production workshop should be controlled at about 60%.
(4) If the drying time is short, the drying time should be extended appropriately. After the coated product is completely dried and cooled on the winding roller, the film is cut and cut.
