Hot selling pure polyester powder coatings

Properties of hot selling pure polyester powder coatings

1： Physical properties of powder

---Specific gravity: 1.4 ~ 1.8g/cm3 (varies with formula color)

---Particle size distribution: the average particle size of the standard type is 35 ~ 40 μ m, less than 10 μ m powder less than 0.5% powder larger than 100 μ M.

Coating performance: 0.8mm thick degreasing derusting cold rolled steel sheet with film thickness of 50-80 μ m was used in all tests.

2： Mechanical properties:

Pencil hardness GB / T 6739-1996 h-2h

Adhesion (cross cut method) GB / T 9286-1998 grade 0

Bending test GB / T 6742-1986 ≤ 2mm

Impact test GB / T 1732-1993 ≥ 50 kg.cm

Cupping test GB / T 9753-1988 ≥ 7mm

3： Corrosion resistance:

Moreover, the salt spray width is more than 1.772 mm in 1991.

There was no change in damp heat test (GB / T 1740-1979) for more than 1000 hours.

The temperature resistance is 100 ℃ / 48 hours (white sample) with excellent light retention.

Color retention △ e ≤ 0.5.

Accelerated light aging test quv-b313.

(240h, 8h / 60 ℃ illumination, 4H / 50 ℃ condensation).

GB / T 14522-1993 light retention ≥ 80%

The above performance indexes may decrease slightly with the decrease of gloss.