The effect of the hot laminating machine directly affects the quality of the printed matter and directly affects the interests of customers.
 In the pre-coating film laminating machine, the glue is melted by heating, and then the film is adhered to the printed matter by pressurization. The single-sided film curling of the small pre-coating type thermal laminating machine has always been a headache. What is the reason for the single-sided film curling of the film machine?
 After many times using small pre-coating hot laminating machines, after experimenting with printing materials of various materials, we found that the single-sided laminating film curled generally showed curling in the direction of the film, which could not be kept flat and wrinkled. If the mark is serious, it will automatically curl into a cylindrical shape, which will affect the effect of subsequent processes. The main reasons for single-sided film curling:
 1. The coated paper is too thin; although the current laminating machine is suitable for laminating paper prints of various materials, the thinner the paper, the easier it is to deform and curl
 2. The paper has much water content and high humidity; the paper is loose and flat. Laminating machine should also pay attention to the direction of the paper strands, especially thick paper, to reduce the phenomenon of paper curling caused by rolling and stretching.
 3. The pressure of the hot laminating machine is high, the temperature is too high, and the time is too long. The current working temperature and working speed of the hot laminating machine can be adjusted freely. For the lamination of various printed products, the selection and setting should be based on different materials. Set temperature and speed.
 Product quality standard of hot laminating machine: the surface is clean, flat, no blur, good finish, no wrinkle, no foam, no paper-plastic separation, no powder foil marks. The degree of drying is appropriate, and there is no phenomenon of sticking the surface film or paper. Handle the relationship between the temperature, pressure and time when the paper and plastic film pass through the hot pressing mechanism during the laminating process. Pay attention to adjusting the temperature, mechanical pressure and mechanical speed of the heat roller to avoid blistering and paper during laminating Problems such as poor plastic adhesion.