Preheating method for heat shrinkable film label

1 heating plate preheating: the plastic on a power, gas or steam heating to the specified temperature and can be horizontal rotation of the metal plate for preheating, can also be used to press the lower press plate to preheat the vacancy.

2: preheat the oven oven device with forced air circulation and accurate temperature control, general electric heating resistance wires, using resistance heating wire heating air, then the hot air will be heated to a predetermined temperature of plastic, and the fan forced air circulation.

3 infrared preheating: the use of infrared radiation to the surface of the plastic into heat energy, heat conduction to the inner layer of plastic. The equipment is equipped with infrared lamp box, the inner wall of the box painted with white paint or chrome plated, external use of asbestos board insulation. The preheating temperature is controlled by adjusting the wattage of the lamp, the number of the plastic, the distance between the plastic surface and the lamp and the irradiation time. Heat shrinkable film label