Thermofix is typically used in a Fluid Bed Powder Coating process, which involves dipping preheated metal parts into a fine powder suspended in an air chamber. Fluid Bed process is used when uniform and drip-less coating of 300 – 600 microns is required. This method is very efficient and low cost.
Major advantage of the fluid bed method is a waste-free 100% usage of the powder, which is either melted onto the product or remains in a bath. The ability to coat several products at once by immersion in a fluid bath makes this method very efficient. Truly low-tech technology that does not require a lot of interventions or adjustments.
Thermofix KPE 03
Polyolefin composition blend for coating battery boxes.
Thermoplastic powder Thermofix has been specifically developed to ensure the protection of the steel surface. Properties have been achieved thanks to the special composition based on modified polyolefins. Thermofix has excellent mechanical strength, resistance to chemicals, salt and pollution in the air. Thermofix has excellent adhesion to metal. It provides a high degree of electrical insulation, abrasion resistance and impact resistance.
Thermofix is typically used in a Fluid Bed Powder Coating process, which involves dipping preheated metal parts into a fine powder suspended in an air chamber. Fluid Bed process is used when uniform and drip-less coating is required. This method is very efficient and low cost.
How to Use
The steel surface must be cleaned of grease and other impurities with technical petrol. For better adhesion of the material is recommended to slightly roughen the surface.
It is recommended to preheat the metal to a temperature of 280-350° C. Because the preheated metal cools after removing from the oven, it is important to minimize the distance oven - fluid bath. The hot metal is immersed in the powder for 8-10 seconds. Extending the time will not improve the coverage.
For thin layer applications it is suggested to second heat the product after the powder application to temperature of 170-180° C.
The recommended temperatures might need adjustment for specific products, however, the adhesion of the powder is ensured only at temperatures above 150° C. Overheated material can cause color instability.
The whole production process is carried out under strict quality control standard per ISO 9001:2000.
Product specification sheet KPE 03
3 m2/kg at 350 µm
95% less than 300 µm
Cured film properties
Recommended film thickness
loss of film adhesion less than 10 mm from the cut
corrosion under layer of 2-3 mm
cross-sectioned surface (X)
Neutral Salt Spray test
300 - 1000 µm
after 1000 hours
no adhesion loss
no signs of corrosion
- acids and alkali
- salts /except peroxid/
- solutions 60 ºC
MFI 190 ºC, 2,16 kg
4 - 8 g/10´