Laminating is a commonly used production process for packaging and printing products. After the printed product passes through the film, it can achieve waterproof, antifouling, heat resistance, light resistance, and abrasion resistance, increase or decrease the brightness of the product surface, so that the product can adapt to the requirements of different situations. Laminated products generally need to be trimmed or die-cut before they become products. Therefore, this requires that the coated product should not deform and have good flatness, so as to ensure the quality of the finished product.

However, due to inadequate production operations and technical measures, it is easy to cause deformation or even curling of the coated product. Our factory has a FM600B film laminator. Due to the lack of production experience of the operator, during the film lamination process, due to the deformation, curling and wrinkling of the product, the temperature of the machine, the pressure between the rollers, and the guide After repeated adjustment of rollers and the like, as a result, not only did the above-mentioned failure phenomena not completely eliminated, but the more and more chaotic adjustment, the failure phenomenon became more severe. Later, after careful analysis and observation, it was finally found that there was a certain amount of "wild rubber" phenomenon on the surface of the original rubber roller. It was this "wild rubber" that was doing the trick, causing the deformation of the printed film. The operator passed the After the laminating adhesive on the rubber roller is cleaned, the deformation of the laminating film on the printed matter is eliminated immediately.

It turned out that the laminating glue accumulated on the rubber roller was transferred and adhered from the "void" part of the film (that is, the part where the film did not cover the printed sheet) when the transfer of the paper was inaccurate, which caused it to stick over time. The amount of film accumulated on the rubber roller gradually increases, and the viscosity increases accordingly. In this way, to a certain extent, during the laminating process, the laminating glue accumulated on the rubber roller produces a certain strength of the adhesive force on the printed sheet. This "pull" is just the opposite of the "paper feeding" direction of the laminated sheet. Then, at the moment when the laminated printed sheet is rolled under high-speed conditions, due to the local adhesion and tensile force of the laminated glue on the rubber roller to the printed sheet, it causes local tensile deformation of the laminated printed sheet. This deformation is mainly manifested as the appearance of the paper surface. Obvious unevenness, even curling phenomenon, resulting in inaccurate trimming or die cutting specifications. Therefore, in order to prevent this kind of unfavorable situation from happening, every shift personnel should scrub the laminating glue accumulated on the rubber roller with thinner during the production process to avoid undesirable situation and affect the normal production and quality.

The appearance and elimination of the above quality faults give the author a great inspiration: in the production process, only strictly implement the production operation rules, do the production operations carefully, and pay attention to keeping the roller surface clean and clean, not only can be better To ensure product quality, and can effectively avoid or reduce the chance of various failures, improve production efficiency.

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