1. Introduction to Clear Halogen IR Infrared Heat Lamp Heating Elements for PET Blowing Machines
- What are halogen infrared heat lamps?
- Halogen infrared heat lamps are a type of heat source that uses a tungsten filament encased in a quartz envelope filled with a halogen gas (usually iodine or bromine). The halogen gas serves to redeposit evaporated tungsten back onto the filament, which significantly extends the filament’s life compared to a standard incandescent bulb without halogen.
- They emit infrared radiation in a wide range of wavelengths, with a significant portion falling in the medium – to – long – wave infrared region. This infrared radiation is highly effective for heating applications as it can be absorbed by many materials and converted into heat energy.
- Importance in PET Blowing Machines
- In PET (Polyethylene Terephthalate) blowing machines, precise and efficient heating is crucial. PET is a thermoplastic material, and during the blowing process, it needs to be heated to a specific temperature range to ensure proper moldability and bottle quality. The clear halogen IR infrared heat lamps provide a focused and intense heat source that can quickly heat the PET pre – forms to the desired temperature for the blowing operation.
2. Working Principle in the Context of PET Blowing
- Infrared Radiation Absorption by PET
- PET has a good absorption rate for infrared radiation in the wavelengths emitted by halogen IR lamps. When the infrared rays from the lamps strike the PET pre – form, the molecules of PET absorb the energy. This causes the polymer chains to gain kinetic energy and vibrate more vigorously. As a result, the temperature of the PET pre – form rises.
- The absorption characteristics of PET in the infrared range allow for efficient energy transfer from the lamps to the material, minimizing energy waste and ensuring a relatively fast heating process.
