Dry film is widely used in printing and packaging industry because of its environmental protection, energy saving and easy operation. However, in actual production, some companies do not pay attention to or ignore the precautions of dry lamination: they may not know which prints are suitable for dry lamination, and which are not suitable for dry lamination. Passiveness even causes irreparable losses. So what should we pay attention to in the face of dry lamination? Put the BOPP film (roll) coated with hot sol on the support of the laminating machine, and then lead it to the electrochromic roller through the guide roller. Start the main motor and slowly turn the electrothermal roller to face the color of the printed product to be coated. On the top, position the baffle close to the side to realize paper feeding under the action of the conveyor belt. The printed product and the BOPP film are passed through two electric heating rollers. The glue on the BOPP film is melted by heat and pressed by the two hot rollers at the same time. The film is attached to the printed product. For the purpose of laminating the waste film, it is firm, smooth and smooth Finally, the whole process of laminating is completed by the pressure roller shaping. In view of the characteristics of dry lamination, we must pay attention to the following points during operation: 1. Check whether the BOPP film is evenly glued before starting the machine. The glued surface of the film (after passing through the heat roller) during installation should be consistent with the color surface of the printed product; 2. The rollers must be kept clean and parallel, the gap between the two ends is the same, and the rotation is flexible; 3. The paper gap of each roller depends on the paper thickness adjustment; 4. The pressure of the pressure roller should not be lower than 0.2Kpa; 5. The temperature of the electric heating roller should be controlled between 100-125 ℃, preferably stable at 120 ± 2 ℃; 6. The side positioning baffle depends on the width of the product film; 7. Paper feeding should be continuous, but the overlap of printed products should not exceed 0.2cm; 8. Be sure to use a duster to clean the dust before laminating the printed products; 9. The printed product is solid bottom printing or the amount of ink is large, dry film should not be used; 10. The paper weight is less than 60g / m2, and dry film should not be used if it exceeds 380g / m2 11. It is forbidden to use if the film is uneven or the tension at both ends is inconsistent; 12. Films with wet ink are strictly prohibited to be covered with film; 13. The laminating speed depends on the temperature of the heating roller and the paper feeding speed, and it is best to be stabilized at 150 sheets / minute; 14. The printed product with the laminating film should be cooled and set before putting it into the next process; 15. The laminating workshop The humidity should not exceed 60%. If the above factors are neglected, it will result in difficulties such as laminating of printed products, poor adhesion, blistering, peeling, creping, smearing, dullness, etc., and even directly bring difficulties and troubles to the subsequent processes. Handrail System,Handrail Systems With Chrome Tube,Crossbar Holder for Handrail,Rotary Connector For Handrail System JOKER UNO LIMITED , https://www.jokeruno.com
Several problems that should be paid attention to in dry film