How to use dry laminating machine cleverly

　　1. To choose a suitable drying temperature that is too high or too low will affect the bonding fastness of the composite film. When the coated substrate is dried, the heating temperature is too high or after high temperature baking, the surface of the adhesive will be carbonized, thereby destroying the bonding ability of the adhesive. If the drying temperature is too low, the adhesive will not be cured completely, the adhesive will have poor viscosity, and the composite will not be strong. After a period of time, bubbles will easily form in the composite film, which will damage the composite quality of the product. Of course, we can choose adhesives with high temperature resistance and good baking properties to adapt to higher temperature drying, such as polyurethane adhesives.

　　2. Increase the amount of glue applied. If the amount of glue is too small or part of the surface of the substrate is not coated with adhesive, it will be difficult for the two substrates to fit together during compounding. We can choose an anilox roller with a deeper cell, or increase the rubber roller pressure and reduce the contact pressure between the doctor blade and the anilox roller to increase the amount of glue on the substrate surface. For some plastic film substrates, corona treatment can be performed before coating to improve the ability of the substrate to absorb the adhesive and increase the amount of glue on the surface.

　　3. Appropriately increase the composite pressure. Excessive composite pressure or uneven pressure at both ends of the composite roller will cause wrinkles on the surface of the composite film, and empty tunnels will be formed at the wrinkles after composite, which will affect the bonding fastness of the finished product. Appropriately increasing the compound pressure is beneficial to improve the bonding force of the compound. In addition, in order to improve the bonding effect of the composite film and the quality of dairy packaging, it is necessary to avoid foreign matter, dust and other debris sticking to the adhesive or the composite surface of the substrate. Concluding remarks When operating, carefully observe various problems and failures in the production process, and use the above methods to eliminate the failures. When there are multiple problems or failures, a single method may not be able to take care of it. At this time, packaging machinery should be avoided, focusing on solving key problems, and then choosing other methods to solve minor problems one by one.

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