Standard Durable Polyester
Practical TGIC Polyester for Standard Exterior Durability
This category maps to PT0 polyester-TGIC powders in smooth and textured finishes for general exterior metalwork with standard weathering requirements.
The mapped TDS references 500-800 hours of accelerated weathering with gloss retention of at least 50%, with typical durability guidance of about 3-8 years depending on exposure, pretreatment, film thickness and curing.
Typical applications include outdoor furniture, railings, lighting equipment, equipment housings, energy-storage cabinets, automotive parts and general machinery. More demanding projects should evaluate the high durable or super durable ranges.
Selected Product of this range
Standard Durable Polyester FAQ
Can this product series be used in the European market?
PT0S and PT0F both use TGIC curing systems and are currently positioned for relevant markets outside Europe.
Before export, product suitability should be confirmed against the regulations of the target country or region.
TGIC (triglycidyl isocyanurate) curing agents have been listed as substances of very high concern (SVHC) under EU REACH regulations, with the following main risks:
Health risk:
skin sensitization that may cause contact dermatitis.
Environmental risk:
harmful to aquatic organisms and difficult to biodegrade.
Regulatory trend:
several European countries have restricted or prohibited the use of TGIC in outdoor powder coatings.
Why are impact and bending performance marked as "excluding low-gloss products"?
Low-gloss products contain matting agents, which reduce coating toughness, so their impact and bending performance is weaker than that of conventional products.
Where high mechanical performance is required, medium- or high-gloss products are recommended, or film thickness may be increased for compensation.
How should particle size and film thickness be matched for a sand-textured finish?
For PT0F sand-textured products, D₅₀ is 30–45 μm.
Fine textures are recommended toward the lower end of the range and coarse textures toward the upper end.
At 70–90 μm film thickness, the texture is clear; above 120 μm, the texture may build up and become less distinct, so spray validation is required.
Why are powder-coating curing conditions based on "workpiece temperature" rather than oven temperature?
Oven temperature only represents the air temperature inside the oven.
Because workpieces differ in material, thickness, and shape, their heating rate and actual temperature can differ significantly from the oven setting.
Only when the workpiece surface reaches the specified temperature can the resin and curing agent fully crosslink and form a dense coating film.
Using workpiece temperature as the basis helps ensure:
Consistent curing between batches and different workpieces.
Reduced performance variation caused by different heating profiles.
Accurate control of crosslink density to maintain mechanical and weathering performance.
Why should spray-gun voltage be reduced when applying metallic-effect powder coatings?
To prevent oxidation, discoloration, and performance degradation of metallic pigments.
Metallic pigments such as aluminum and bronze powders are highly conductive.
At high voltage, tip-discharge effects can create excessive local current density.
This may cause two problems:
- breakdown of the oxide film on aluminum powder, darkening the metallic appearance
- and oxidation of bronze powder at high temperature, causing green corrosion and color shift.
High voltage can also overcharge metallic particles, disturb their trajectories in the electric field, and cause uneven pigment distribution, mottling, or orientation differences.
Reducing the voltage to about 40 kV allows gentler charging, helping maintain metallic gloss and color stability while supporting transfer efficiency and coating uniformity.
Lower voltage also reduces the Faraday-cage effect and can improve coverage on complex edges and recesses.