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The first choice is the correct choice of shrinkage furnace and temperature setting.
The setting of temperature depends on the shrinkage furnace itself, so it is very important to choose the shrinkage furnace. Different materials of shrink film can choose different functions of the shrink furnace. POF environmental protection heat shrinkable film, the best choice of the furnace blast circulation of constant temperature shrinkable furnace, to avoid the shrinkage of the film due to uneven heat, and affect the shrinkage effect. If the temperature is set high in the process of shrinkage, the shrinkage film will be burned out in the process of product shrinkage; If the temperature is set too low, the surface of the contracted film will be wrinkled and uneven.
Secondly, the thickness of POF shrink film should be considered.
Generally 0.015mm(1.5 wire) below the POF shrinkage film optimal shrinkage temperature at about 150 degrees Celsius, the greater the thickness of the shrinkage temperature is higher, 0.02mm (2 wire) above the shrinkage film shrinkage temperature at about 170 degrees Celsius. The specific size depends on the actual shrinkage.
Finally, there is the seasonal factor.
The temperature of the heat shrinkable machine has different adjustment in different seasons. When the weather is cold, the shrinkage temperature should be properly increased, and vice versa. There are different manufacturers of shrinkage machine heating parts are not the same, the actual heating effect is not the same, some may not reach the specified temperature, the actual shrinkage should be paid attention to.
In addition to temperature, other factors affecting the shrinkage effect of plastic film.
The matching of the conveying speed and temperature of the shrinkage furnace is also very important, as well as the horizontal loading when packing, and the two corners should be parallel. Finally, it explodes because the temperature is too high, and the shrinkage is not good because the temperature is too low, or it has a certain relationship with the number of exhaust holes.
These are several reasons why the shrinkage effect of POF shrink film is affected by temperature.
