So how to reduce the impact of the protective film white spot on the product, you can pay attention to the following points:
1, different batches of ink to increase particle size detection indicators, strictly controlled, especially the full end ink varieties, particle size and particle size distribution outside the standard range is not adopted; select good and stable suppliers. The protective film is based on the bottom mold overlying a layer of oily glue, the protective film industry belongs to the high-end product protection film, which mainly used for advanced batteries, lens panel products packaging, especially some with water and air, sunshine insulation products, electronic protection they become the preferred packaging film. White spots appear on the phenomenon and a lot of protective film, some reasons on the production process, there is cause after production is not properly maintained, in white spots, causing great losses to the product itself, so how to eliminate these spots, the producers and manufacturers are required to have the knowledge to say. So how to reduce the effect of flaking on protective film products? Can pay attention to the following points: 1, different batches of ink particle size increase detection index, strict control, especially the full bottom ink varieties of particle size and particle size distribution in the standard outside the scope of the;
2. Use special adhesive for electronic protective film. The surface adhesive force of the special adhesive for electronic protective film is lower, and the spreading effect on the surface of the adhesive layer is better than that of the general adhesive. Using glue glue will be very easy to control the flow of liquid, there is a better coating state. From the adhesive coating state, the use of electronic glue can eliminate the possibility of white spots.
3, the viscosity of the gum and the number of roller lines have a certain matching relationship, beyond the matching interval too much damage to the coating state of glue, resulting in “white spots” of the cause of concern. 4. Adopt electronic protective coating. The coating process is commonly used in printing film (ink surface) coating, here is the special coating method, to avoid the penetration of ethyl ester on the ink layer of the uneven problem, avoid the penetration of ethyl ester on the ink layer of the uneven problem, at the same time, the adhesive coating can fully cover the surface of the adhesive layer that can be eliminated white spots. But this process has its significant limitations, first of all, only the VMPET composite, and other electronic protective film heated in the oven in effect under the action of the tension will be tensile deformation; secondly, the peeling strength of the sacrifice.
5, soft packaging enterprises must adhere to the coating roller regular cleaning system, master the correct coating roller cleaning method. In the production of full white or light background printing film, pay attention to two points, first of all, before production, scraper, coating roll, flattening roll and so thoroughly cleaned.
6, should be done thoroughly drying adhesive. Because the barrier aluminum is better, such as in the composite film adhesive is not completely dry, then the composite membrane in curing room, a large number of solvent residues to quickly release in the electronic protective film barrier, will form a bubble. There will even be no white spots when the machine is down, and the white spots appear after ripening.
