The PET blowing equipment itself has very high requirements for the wavelength accuracy, color temperature, and heating efficiency of the infrared heating tube.The wavelength should be 0.8 – 1.5 µm.

The substance only absorbs the infrared radiation that can meet the high and low energy level transitions of its molecules, and the infrared radiation whose frequency cannot meet the conditions is not absorbed and passes through. Only when the wavelength of the infrared heating tube is accurate enough, can it match the wavelength of the material to be heated, and the radiant heat energy it generates can be absorbed by the molecules of the material. In this process, it is not blocked by the surface layer of the material, and the heating rate is extremely fast. To put it simply, the matching wavelength of the heated material itself is fixed. We only have to adjust the wavelength of the infrared heating tube to match it. The higher the accuracy of the wavelength of our heating tube, the matching between you and the heated material The higher the degree, the more the heat generated can be absorbed, so as to achieve efficient heating.

For PET bottle blowing equipment, short-wave infrared heating tubes are mainly used, which can penetrate the surface of the material to ensure uniform heating and are used in the preheating and forming stage of PET preforms. The reaction time of the short-wave infrared heating tube is extremely fast, and the full power output can be achieved in just one second, which quickly reaches the temperature requirements required by the customer; on the basis of achieving precise wavelengths, the radiation produced by the short-wave infrared heating tube is comparable to PET The absorption characteristics of the material are precisely matched, and it can be quickly converted into heat energy on the PET bottle, and almost no excess heat energy will be dissipated to the surroundings. Then, the PET bottle can quickly enter the next production process after radiant heating, which greatly saves time. Reduce heat loss and save energy.