PE thermoplastic blend for electrostatic and electrokinetic spray coating

General Features

Polisint® thermoplastic powder is based on a modified polyethylene and is specially developed to provide long-term, protective surface layer of iron, galvanized steel and aluminum both for the interior and the exterior applications.

Polisint® is resistant to mechanical damage, stress cracking, adverse weather conditions, detergents, chemicals, acids, solutions, salts and air pollutants in the air. The surface has excellent adhesion to metal. The resulting surface also provides very good abrasion and impact resistance.

Product specification sheet KPE 20

Powder coverage5,23 m2/kg at 200 µm
Particle size90% less than 200 µm
Density0,93 g/cm3
MFI 190 ºC, 2,16 kg4 - 8 g/10´
Fluiditylow
Melting point109 ºC

Typical coating characteristics

Cured film thickness120-250 micron
Impact force (ASTM D 2794-93)˃ 10 J
Adhesion (ASTM D 3359-93A)A1
Abrasion resistance Taber CS10 500g 500c4 mg
Salt bath - 1000 hours - cut with steel loss of film adhesion less than 10 mm from the cut

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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:

Applying with electrostatic (KORONA) gun requires negative polarity. Powder can be also sprayed with electrokinetic (TRIBO) guns. Recommended setting is 30-50 kV or 10-20 µA. After coating, the product must be heated up in oven at 190-220° C for 10-20 minutes depending on the thickness of the applied powder. Recommended thickness 250-300 microns.

Cured film properties

Recommended film thickness300 - 1000 µm
GlossISO 281370
Neutral Salt Spray testISO 7253after 1000 hours
cross-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

Application Method

Polyethylene powder designed for metal coating by electrostatic or electrokinetic spraying.

The recommended spray guns are electrostatic (Korona) or electrokinetic (Tribo).

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