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High weather resistance (HDPE) polyester coil coating

Because ordinary polyester resin can only meet the requirements of 3-5 years of weather resistance, and the use of fluorocarbon resin coating, raw material cost is too high, according to the needs of the market, our company specially developed a high weather resistance polyester coil coating, after aging resistance test, its weather resistance can reach 5-8 years.

The polyester resin used in the coating has a special chemical structure, the resin is linear structure, completely using no hydrocarbon (C=H) double bond monomer polymerization, has excellent yellowing resistance, good light preservation; The coating can be single or double coating, coating adaptability is good, coating has excellent gloss, hardness, chemical resistance.

Coating performance test index

Test item

Inspection standard

An instrument or method of inspection

Coating appearance

Coating surface should be flat, no bubbles, shrinkage and other undesirable phenomena

Eye   measuring

fineness

Brightness: Matte 20-25um below 10μm

Fineness plate

viscosity

110-130" 25 ℃ /

FD4# Viscosity Cup

Wet film specific gravity

1.2-1.4

100ml specific gravity cup

Solid composition

White: 55-56%

105℃×3Hr

luster

According to the actual requirements of customers

Glossometer Angle 60°

adhesion

1mm×1mm×100/100

Hundred grid method

hardness

≥2H

Mitsubishi pencil

impact

No cracks at 1/2φ×1000g×50cm

Impact meter

bend

Finish paint ≤2T

Bending meter

Solvent resistance

≥100 times (1kg force)

MEK

Boiling water resistance

99±1℃2Hr no bubbles, paint and other abnormal phenomena

Thermostatic water bath

Weather resistance

1500HR No foaming, no peeling, no crack

Weather testing machine


High weather resistance (HDPE) polyester coil coating technology

Two coatings and two baking processes are commonly used

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