Page 7 - Infrared for plastics EN

Twin tube emitters achieve a particularly high radiation strength.
According to their material properties, plastics absorb some of the infrared radiation, relect some at the surface and allow some of the radiation to pass through. By carefully selecting emitters to match their spectra to the material being processed, the majority of the radiation is absorbed and converted to heat creating an eficient operation.
Non-dazzle IR emitters – for safety reasons with some applications it makes sense to ilter out intense light radiation. This is achieved by applying an antiglare coating.
Emitter shapes – As a producer of quartz material,Heraeus also offers twin and round tube emitters in curved forms. Consequently, the heating method can be matched exactly to different manufacturing processes.
Infrared emitters and their characteristics
NIR InfraLight halogen emitters are cost-effective emit-
ters produced to standard commercial dimensions used in many infrared systems. Heraeus gold relectors increase the eficiency of the halogen infrared emitters. This short wave, high light component emitter is used to heat thick sheets and solid plastic materials.
Short wave, twin tube emitters are comparable in spectrum to halogen emitters. They are used in processes where rapid heating is important. Because of their stable construction, twin tube emitters can be supplied in larger lengths. They offer virtually double the life compared to halogen emitters because of their stronger heating elements.
Fast response, medium wave emitters are twin tube emit- ters with a spectrum between short wave and standard medium wave emitters. These emitters can be supplied in lengths up to 6.4 m so they are ideally suited to be used in large modules. They achieve a signiicantly higher area heating power than standard medium wave emitters.
Carbon infrared emitters CIR® are a recent development. These emitters use a carbon ribbon as the heating ele- ment. They have very fast heating times (1–2 sec) which means they are especially suitable for processes where the heat must be switched on and off quickly. The spectrum is the same as medium wave emitters so carbon emitters are eficient for heating plastics and for drying processes. They are produced in lengths up to 3 m.
Medium wave emitters distinguish themselves by being highly eficient and stable while having a long operating life. The medium wave emitter spectrum is well suited for heating processes with most materials and the emitters are available in lengths up to 6 m.
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Carbon Twin
Medium Wave