1. 150m/min high speed has already reached the international most advanced level.
2. Rewind and unwind both adopt double position and equip with semi-automatic to connect paper device, The machine can change the rolls of base material nonstop， It will reduce the waste.
3. When the double sides adhesive tape coat twice, it will effect the quality of products, but the technology of double sides coating meanwhile will solve the questions.
Characteristics of several coating methods -
This size coating is typically applied by two roll transfer. By adjusting the gap between the upper rubber roller and the coating roller, the amount of coating can be adjusted. The structure of the entire coating head portion is relatively complicated, and the processing precision and assembly precision of the rubber roller, the coating roller, the traction roller and the scraper are required, and the cost is relatively high. Since the coating machine mainly uses a high-precision optical roller for sizing coating, the coating effect is good, and the coating amount is adjusted by the gap between the sizing roller and the coating roller, and can also be coated. The micro-motion adjustment of the scraper is flexibly controlled, and the coating precision is high. It is currently the most widely used on coated composite equipment.
This coating apparatus mainly uses a textured (concave-eye) coating roll for sizing coating. The coating is uniform and the coating amount is relatively accurate (but the coating amount is difficult to adjust). When coated with an anilox roll, the amount of coating is mainly related to the depth of the concave surface of the anilox roll and the accuracy of the type of glue. The deeper the depth of the concave surface of the anilox roll, the greater the amount of glue transferred from the concave eye to the substrate; conversely, the shallower the depth of the concave surface of the anilox roll, the amount of transfer to the substrate is correspondingly reduced. It also has a lot to do with viscosity. Too much viscosity and too small a glue is not conducive to the normal transfer of glue. Glue viscosity is easy to transfer, too thin is easy to flow, so that the glue is not uniform, easy to produce vertical or horizontal flow pattern. Therefore, once the type of the coated anilox roll and the glue are fixed, it is difficult to adjust the coating amount, which is also the main reason for the limitation of the application of the textured coating roller.
Micro gravure coating advantages:
1. A very thin coating can be applied to very thin materials. Since there is no back pressure roller, there are no defects such as offset printing and wrinkles on the coated surface.
2. Since there is no back pressure roller, the edge of the film can be coated with glue without worrying that the glue is applied to the back pressure roller to affect the coating.
3. Due to the light contact of the doctor blade with the anilox roller, the scraper and the web roller are very worn.
4. The micro-concave roller has small diameter and light weight, and different coating amounts are applied, and it is convenient to replace the micro-concave roller. 5. Reverse coating can obtain relatively flat coating, and the coating amount is evenly distributed.
Miniature gravure coating disadvantages:
1. The micro gravure coated glue storage tank needs to remain full when the coating liquid is applied, and the micro concave roller is only in contact with the overflowed liquid phase, so that the glue in the plastic storage tank cannot be fully utilized, and It can't be recycled, so it causes a certain amount of waste, and the amount of glue waste is about 10KG.
2. If the micro-concave roller is not clean after use, it will easily cause the micro-concave roller to rust and it is difficult to remove rust.
3. Since the glue in the glue storage tank is exposed to the air during coating, dust and particles in the air are easily dropped into the glue storage tank during coating, which has a certain influence on the quality of the coating.
4. The micro gravure coating system is more complicated, and it is difficult to clean and disassemble. It often takes 1-2 hours.
Zhengzhou EAST IMPORT AND EXPORT co., ltd . ( a goulian group of company) a manufacturer and exporter for all kind of packaging machinery , like bopp tape coating machines, bopp tape slitting machines. Bopp tape core cutter, bopp tape core loader etc