Reasons for poor shrinkage of POF shrink film and treatment methods

Pof shrink film is widely used in the market. The market has developed well and has many advantages. However, some manufacturers may produce products with poor product shrinkage. What is the reason and how to solve it?　　 One, the temperature is not enough. The working principle of the shrinking machine is actually relatively simple, that is, the matching of speed and temperature. When the temperature is low, the surface of the product will appear wrinkles. And if the temperature is high, the film will be scalded again. Generally, POF shrink film can be used at a temperature of about 150-180 degrees.　　 Second, the furnace size is inappropriate. There are two situations in which furnace dimensions are not suitable. One is that the furnace is too large, and the other is naturally that the furnace is too small. The situation that the furnace is too large is that the temperature of the POF film is relatively small, and most of the heat is difficult to concentrate, so the shrink packaging machine needs to be increased to a high temperature to shrink better. If the furnace is too small, the film will stick to the inner wall of the furnace, which will be burned.　　 3. The shrink film has no punctures. This situation is mainly aimed at the automatic packaging of pof shrink film. When the user’s product needs to be fully packaged, some small holes must be pierced on the surface of the shrink film, so that the gas in the film can be emitted through the small holes when shrinking, otherwise If the gas is in the membrane, the membrane will bulge up.　　 Fourth, the speed does not match. The user shrinks different products, the length of the furnace is different, the temperature of the furnace is different, and the required conveying speed is also different. There is no standard value for this speed for reference. The main reason is that the customer needs to test during use. Generally, after several tests , Basically there will be better results. The longer the furnace, the higher the temperature and the faster the speed, which needs to be decided by the customer according to their needs. 5. The quality of the film is too poor, or the width of the selected film is not appropriate, the POF shrink film applied to the shrink machine needs to meet certain requirements. If the quality of the shrink film is too poor, the shrinking effect must be bad. Either there are wrinkles or they will break. Pof shrink film has been widely valued by developed countries in the world, and has basically replaced PVC heat shrink packaging film as the mainstream product in heat shrink packaging materials. Therefore, in the production process, we must pay attention to the quality of the product. Standard operation to avoid unnecessary trouble. Previous: The secret of pof shrink film without deformation for a long time