0010010 nbsp; 0010010 nbsp; 0010010 nbsp; YifangAluminum foil adhesiveThe probability of outages will increase dramatically. Once the material is cut off, re-feeding is much more difficult than the two-feed or short-path feed, and it is more troublesome than the one-feed film.

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; An additional cleaning workload will be required during job conversion. No user will use the aluminum foil / film composite during the running time, and always switch between other composite structures, and generally the time and frequency of aluminum foil / film composite use is relatively small. In order to reduce the damage of the aluminum foil, in addition to the above concerns, the operator needs to clean the rollers on the first release and the channel before each aluminum foil / film composite; and these cleaning requirements are higher when performing other composites This naturally increases the workload and difficulty of the operator. 0010010 nbsp;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; The compounding of aluminum foil adhesive and printed film does not mean that it can improve the compounding condition, and may be even worse.

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; For PET light film / aluminum foil composite, the reason for putting aluminum foil adhesive is not sufficient. Because the two unwinding or short path aluminum foil unwinding has been used for many years, it can meet the production requirements.

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; For PET printing film / aluminum foil compound, a single aluminum foil adhesive does not mean that the compound quality can be improved. Here, we must soberly realize that the uniform coating thickness before compounding is not equal to the uniform bonding layer after compounding. Under normal equipment and operation conditions, the thickness of the adhesive layer on the surface of the aluminum foil after coating is quite uniform, but after compounding with the PET printing film, the distribution of the adhesive layer changes because the compound pressure will change the The interlayer is distributed, and is mainly affected by the layout and graphics. When the height difference of the ink layer of the layout increases, the probability of white spots or bubbles will also increase, especially for the layout with gravure color blocks. We must bear in mind that the thickness of the general coating is only {{{{5}}}} ~ 2 µm, and the thickness of the ink layer on the surface of the gravure printing plate can reach {{5}} ~ 5 µm or even {{{{5}}}} 0µm. Whether a thin coating can cover a thick ink layer is a big question. The specific gravity of gravure is a characteristic of China's flexible packaging printing market.

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Present demonstrations are all flexo printing, surface printing or optical film, which cannot effectively reflect the real needs of China ’s flexible packaging market.

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; The selection and use of the front and back sides of aluminum foil during some demonstrations also deviated from the actual demand. So far, in most of the similar demonstrations, suppliers have used aluminum foil front (glossy) and PET composite. In actual production, most users will choose to compound the reverse side (matte side) of aluminum foil with PET. Relatively speaking, the difficulty of smooth compounding of aluminum foil glue is less. What's more, the conditions required for a few minutes of demonstration and several hours or even days of continuous production are different!

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; In general, the release of aluminum foil glue interferes more, the operation is more strict, the material is cut off more frequently, and the scrap rate is higher. Therefore, we believe that this idea has its limitations that are not easily overcome, and is not the correct technical path to solve the problem.