filter element powder Coating
We are a manufacturer based in China, specializing in high-quality filter element powder Coating for industrial clients worldwide. Technical support and custom formulation available.
Category：powder Coating | Brand：MT
Factory Direct
7-30 Days Lead Time
MOQ: 100KG
Global Export
Introduction
Filter element powder coating is tuned for automotive filter housings and end-caps: flexible enough not to burst when the edge is sealed, and breathable enough not to trap bubbles under the seal. It is named after the industry it serves, with materials and process adjusted to match filter production rather than a one-fits-all general powder.
Product Features
Specific gravity 1.2–1.8 g/cm³. Good flexibility — no powder burst after edge sealing; good air release — no bubbles after edge sealing.
Physical Properties
| Test | Standard | Result |
|---|---|---|
| Bending | ASTM D522 | Pass, 5 mm curvature |
| GB/T 1731 | Pass, 1 mm curvature | |
| Dry adhesion | ASTM D3359 | 5B |
| ISO 2409 / GB/T 9286 | Grade 0 | |
| GB/T 9286 | Grade 0 | |
| Cupping | ISO 1520 / GB/T 9753 | Pass 5 mm, no cracking or peeling |
| GB/T 9753 | Pass 5 mm, no cracking or peeling | |
| Impact (forward) | ASTM D2794 | ≥ 50 kg·cm |
| GB/T 9753 | 50 kg·cm | |
| Pencil hardness | ASTM D3363 | ≥ H |
| GB/T 6739 | ≥ H |
Process
- Pretreatment: degrease all metal substrates; phosphate iron/zinc for ferrous metals, chromate for aluminium, to improve corrosion resistance.
- Application: manual or automatic spray; automatic equipment recommended for consistent coverage. Recycle overspray through a suitable system. Atomising air ≈ 0.5 bar, primary air ≈ 0.5 bar, spray voltage 40–90 kV.
- Cure: 200°C × 12 min or 180°C × 15 min (object surface temperature).
- Touch-up: grind and blow clean, then recoat at reduced voltage.
- Storage: 12 months below 30°C; retest after expiry and reuse only if still within spec.
Practical note: for a filter end-cap, the joint is the whole job. A brittle film cracks when the cap is pressed onto the pleat media, and an over-built or under-flattened film leaves trapped bubbles that later blow out under oil-pressure and vibration — so cure to object temperature, keep film build even, and confirm the edge-seal flexibility on your actual cap geometry. Recycle ratio and gun voltage on small intricate housings matter more than on flat panels; too high a voltage causes back-ionisation and orange peel around the end-caps. Always run a trial batch on the real housing before full production.
Inquiry
We'll reply within 24 hours
Or contact us directly:
