Polyolefin composition blend for fluidized coating wire program

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. UV stabilization for outdoor use is optional.

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.

Product specification sheet PS 02

Powder coverage3 m2/kg at 350 µm
Particle size90% less than 300 µm
Density0,93 g/cm3
MFI 190 ºC, 2,16 kg24 - 32 g/10´
Fluidityhigh
Melting point105 ºC

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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.

Cured film properties

Recommended film thickness300 - 1000 µm
GlossISO 281370
Neutral Salt Spray testcross-sectioned surface (X)loss of film adhesion less than 10 mm from the cut

corrosion under layer of 2-3 mm
undamaged surfaceno adhesion loss
no signs of corrosion
Chemical resistance- acids and alkali
- salts /except peroxid/
- solutions 60 ºC		good
good
good
Adhesionexcellent

Quality guarantee:

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

Application Method

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.

Thermofix® PS 02 was formulated especially for coating of wire-based products, such as wire baskets and shelves for domestic or industrial use, like for refrigerators and freezers:

– excellent coverage in problem areas like corners, joints, sharp edges

– lower powder and energy consumption. In many cases, customers notice up to 20% less material consumption with Micromill powder than with their original powder.

– attractive looking surface that provides long-term protection

– certification for contact with the food

– surface does not crack peel

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.

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