How to use the dry laminator more flexibly
How to use dry laminating equipment skillfully
Choosing a suitable drying temperature that is too high or too low will affect the adhesion of the composite film. When the coated substrate is dried under too high a temperature or subjected to high temperature cooking, the surface layer of the adhesive is carbonized, thereby destroying the adhesive ability of the adhesive. If the drying temperature is too low, the adhesive will not cure completely. The adhesive has poor adhesion and the composite is not strong. After a period of time, bubbles are easily formed in the composite film, which destroys the composite quality of the product.
Of course, we can choose a digital printer with high temperature resistance and good retort resistance to adapt to higher temperature drying, such as polyurethane adhesive.
Increasing the amount of glue applied, too little glue applied or a part of the surface of the substrate is not coated with an adhesive, which may make the two substrates difficult to fit during compounding.
We can use a deeper anilox roll or increase the amount of glue applied to the surface of the substrate by increasing the pressure of the rubber roll and reducing the contact pressure with the anilox roll.
For some plastic film substrates, corona treatment can be carried out before coating to make the surface pilling HP, thereby improving the ability of the substrate to adsorb the adhesive and increasing the amount of glue on the surface.
Appropriately increase the composite pressure, the composite pressure is too large or the pressure at both ends of the composite roll is uneven, which will cause the surface of the composite film to wrinkle. After the composite, the wrinkles form an empty tunnel, which affects the bond fastness of the finished product. Properly increasing the composite pressure is beneficial to improve the composite bonding force.
In addition, in order to improve the bonding effect and quality of the composite film, the PUR hot melt adhesive laminating machine should avoid foreign matter, dust and other impurities from adhering to the adhesive or the composite surface of the substrate. At the end of the operation, we must carefully observe the various problems and failures that occur during the production process, and use the above methods to troubleshoot.
When there are multiple problems or failures, it may not be possible to take a single approach. In this case, we should re-package the machinery, focus on solving the key problems, and then use other methods to solve the secondary problems one by one.
Marshmallow Candy,Marshmallow Gummies,Easter Marshmallow Candy,Cotton Candy Marshmallow
Montreal Shantou Food Co., Ltd , https://www.montrealsnack.com