Rubber Roll "Wild Rubber" and Film Deformation

Lamination is a common production process for packaging and printing products. After the printing product is covered with a film, it can be waterproof, antifouling, heat-resistant, light-resistant, abrasion-resistant, increase or decrease the brightness of the surface of the product, so that the product can adapt to the requirements of different situations. Film-coated products generally have to be trimmed or die-cut before they become products. Therefore, this requires the film products should not be deformed, and has a good flatness, so that we can ensure the quality of finished products.

However, due to the incomplete implementation of production operations and technical measures, it is very easy to cause deformation or even curling of the film products. The factory has an FM600B laminating machine. Due to the lack of production experience of the operator, in the process of a film coating production, the temperature, the pressure between rollers, and the orientation of the machine have been successively changed due to the deformation, curling, and wrinkling of the product. Repeated adjustment of the roller, etc., results not only does not completely eliminate the above-mentioned failure phenomenon, but more and more disorderly, the phenomenon of failure becomes even more severe. Later, after careful analysis and observation, it was finally found that there was a certain amount of "rubber" phenomenon on the surface of the original rubber roller, and it was precisely this "wild rubber" that caused the deformation of the printed film and the operator passed it. After the rubber coating on the rubber roller is cleaned, the film deformation of the printed product is instantly eliminated.

Originally, these plastic films accumulated on the rubber roller were transferred from the "gap" portion of the film (i.e., the portion where the partial film did not cover the printed sheet) in the case of inconsistent delivery of the paper, and were allowed to adhere over time. The amount of coating accumulated on the rubber roller gradually increases and the viscosity increases. In this way, to a certain degree, during the film coating process, the film adhesive accumulated on the rubber roller produces a certain strength of the adhesive force on the printed sheet, and this “pulling force” is just opposite to the direction of “paper moving” of the filmed printed sheet. Then, the film-covered sheet is subjected to high-speed rolling moments due to the local adhesive force of the film glue on the rubber sheet, resulting in partial tensile deformation of the film sheet, which is mainly manifested as paper surface appearance. Obvious unevenness, even curling, resulting in inaccurate trimming or die cutting specifications. Therefore, in order to prevent this kind of unfavorable situation from happening, every class personnel should scrub the plastic film that accumulates on the rubber roll in the production process with the diluent, in order to avoid producing the bad situation, affects the normal production and the quality.

The appearance and elimination of the above-mentioned quality faults give the author a great inspiration: In the production process, only the right strictly enforces the production operating procedures, conscientiously do a good job of production operations, and pay attention to keep the roller surface clean and clean, not only can be better To ensure the quality of products, but also can effectively avoid or reduce the chances of various failures and increase production efficiency.