The POF heat shrinkable film manufacturer tells you how to i
First, the temperature is not enough. The working principle of the shrinking machine is relatively simple, that is, the speed and temperature match. When the temperature is low, the surface of the product will wrinkle. And if the temperature is high, the film will be blanching. Generally, the POF film can be used at about 130 degrees, while the PE film can generally use about 170 degrees of temperature.
Two. The size of the furnace lane is not suitable. The size of the furnace is not suitable for two situations. One is the oversize of the furnace and the other is that the furnace is too small. The occurrence of the assembly of the furnace road is that the temperature of the product is less, most of the heat is three, so it is necessary to increase the heat shrinkable packer to a very high temperature to shrink better. When the furnace is too small, the film will be placed on the inner wall of the furnace, so that it will be damaged.
Three. There is no spiny hole in the heat shrinkable membrane. This situation is mainly aimed at the full package of POF film, when the user's product needs full package, the surface of the shrink film must be piercing some small holes, so that the gas in the film can be sent out through the small hole when the film is contracted. Otherwise, the gas in the membrane will appear in the membrane.
Four, the speed does not match. The product is different, the length of the furnace is different, the furnace temperature is different, the speed of the transportation is different. There is no standard value for reference. The main is that the customer needs to test in the use, after several tests, the basic results will be better. The longer the furnace is, the higher the temperature and the faster the speed. This requires customers to be aware of their needs.
Five, the quality of the film is too poor, or the width of the selected film is not suitable. The shrinkage film applied by the shrink machine needs to meet certain requirements. If the quality of the shrinkable film is too poor, the effect of shrinkage must be not good, or there is folds, or it will break.
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