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.

General Features

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 

Pretreatment:

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.

Coating:

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.

Quality guarantee:

The whole production process is carried out under strict quality control standard per ISO 9001:2000.

Application Method

Product specification sheet KPE 03

Powder coverage

Particle size

Density

Fluidity

Melting point

3 m2/kg at 350 µm

95% less than 300 µm

0,93 g/cm3

low

105 ºC

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)

Gloss

Neutral Salt Spray test

Chemical resistance

Adhesion

300 - 1000 µm

70

after 1000 hours

no adhesion loss

no signs of corrosion

good

good

good

excellent

ISO 2813

ISO 7253

undamaged surface

- acids and alkali

- salts /except peroxid/

- solutions 60 ºC

MFI 190 ºC, 2,16 kg

4 - 8 g/10´

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