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Textile coatings face a balancing act: the fabric surface must stay matte under light, the coating must not stiffen the hand, and no white specks can appear on dark fabrics. The matting agent grade decides all three.
1. Why a dedicated textile grade?
General-purpose matting agents optimize extinction in thick paint films. Textile coatings are thin and flexible, so the grade must disperse fast and keep a tight particle size distribution — coarse particles read as specks on dark fabric, fines raise viscosity without adding extinction.
2. What FINE SIL 7300F delivers
IOTA FINE SIL 7300F is a precipitated silica matting agent engineered for textile finishes and textile coatings:
3. Specification (typical values)
|
Test |
Value |
|
Particle size (μm) |
3.2–4.2 |
|
SiO2 (dried), % |
≥98 |
|
Oil absorption (cm³/g) |
3.0–3.3 |
|
pH value (5% suspension) |
6–8 |
|
Moisture, % |
≤5 |
|
Loss on ignition, % |
≤6 |
|
Pore volume (ml/g) |
1.8 |
|
Surface treatment |
organic |
4. How to evaluate it in your system
Dispersion quality first: check the film under raking light on a black substrate — no specks, no haze. Then measure gloss before and after flexing; a textile coating must keep its matte level after repeated deformation, not just on day one.
FAQ
Q: Is 7300F suitable for dark-colored fabrics? A: Yes — the uniform particle size distribution is exactly what prevents visible white specks on dark grounds.
Q: Organic treatment — why? A: It improves compatibility with the binder system, keeping the silica wetted and dispersed, which protects both hiding power and hand feel.
Product page: https://www.iotasilica.com/product-matting-agent-for-textile-coating-.html
