HMMAT 205 — High-Porosity Precipitated Silica for Inkjet Paper Coatings
HMMAT 205 is a high-surface-area precipitated silica engineered specifically for inkjet paper and specialty media coatings. Its controlled mesoporous structure delivers rapid dye absorption, sharp dot gain control, and high optical density in water-based inkjet coating formulations. The product is manufactured under tight particle-size and pore-distribution control to ensure consistent print quality across high-speed inkjet production lines.
HMMAT 205 is suitable for both cast-coated and blade-coated inkjet media, providing the absorptive capacity required for pigment-based and dye-based inkjet inks while maintaining good dispersibility in standard coating kitchen equipment.
Technical Specifications
| Properties and Test Methods | Unit | Typical Value | Standardization |
|---|---|---|---|
| BET specific surface area | m²/g | 120–160 | GB/T 10722 |
| Oil absorption | mL/100g | 250–320 | GB/T 5211.15 |
| pH (5% aqueous dispersion) | — | 6.0–8.0 | GB/T 1717 |
| Loss on drying (105°C, 2h) | Wt% | ≤6.0 | — |
| SiO₂ content (dry basis) | Wt% | ≥97.0 | — |
| Median particle size d50 | μm | 5–10 | — |
| Sieve residue (45 μm wet sieve) | % | ≤0.5 | — |
Application Suggestions
Inkjet Paper and Specialty Media Coating
HMMAT 205 is designed as the primary functional filler in water-based inkjet coating formulations applied to base papers and specialty polyester or PET media. The high BET surface area (120–160 m²/g) and elevated oil absorption (250–320 mL/100g) create the pore volume needed for rapid ink absorption and dye fixation, resulting in sharp dot definition and high optical density. Typical coating weight is 5–15 g/m² depending on the substrate and target print resolution.
Specialty Packaging Matte Coating
In matte-finish packaging applications, HMMAT 205 contributes both gloss reduction and micro-porosity that supports water-based ink acceptance in digital printing workflows. The controlled d50 of 5–10 μm prevents visible graininess while maintaining the absorptive capacity needed for print quality.
High-Resolution Printing Substrates
For premium photographic inkjet papers and fine-art printing media, HMMAT 205 can be combined with colloidal silica or alumina to build multilayer coating structures. Its narrow particle-size distribution ensures a smooth, defect-free coating surface at high coat weights.
Technical Support & FAQ: HMMAT 205 Precipitated Silica
+Q1: What distinguishes HMMAT 205 from standard matting-agent precipitated silica grades?
HMMAT 205 is optimized for pore volume and dye absorption rather than scattering efficiency. Its higher BET (120–160 m²/g) and oil absorption (250–320 mL/100g) values significantly exceed those of conventional matting grades (typically 40–70 m²/g), making it specifically suited to inkjet absorptive layers rather than surface gloss reduction.
+Q2: How does HMMAT 205 compare to Evonik Sipernat 360 DS or PQ Gasil HP 39?
HMMAT 205 is positioned as a cost-effective equivalent to Sipernat 360 DS (Evonik) and Gasil HP 39 (PQ Corporation) — both high-porosity precipitated silicas used in inkjet coating applications. HMMAT 205 targets the same BET and oil absorption range and offers equivalent ink-absorption performance at a competitive price point from direct Chinese manufacture, with full CoA including BET, oil absorption, pH, loss on drying, and particle-size data.
+Q3: What factors affect pricing for HMMAT 205?
Pricing depends on order volume (FCL pricing significantly below LCL), packaging specification (25 kg multi-wall bags vs. bulk jumbo bags), and destination port. Contact info@semitechnm.com for a FOB Shanghai quotation.
+Q4: What are typical lead times and payment terms?
Standard lead time is 7–14 days from order confirmation for stocked grades. Payment terms: T/T, L/C, D/P. Free samples of 200g–1kg are available for formulation trials on request.
Packing & Storage Information
20′ FCL Container Approximately 18–20 MT of HMMAT 205 in 25 kg multi-wall kraft bags (800 bags per FCL). Palletized or floor-loaded options available.
40′ HQ Container Approximately 20–22 MT in 25 kg bags or bulk 500 kg jumbo bags. Bulk packaging reduces per-kg packing cost and is preferred for high-volume coating operations.
Storage Conditions Store in a cool, dry warehouse away from moisture sources. HMMAT 205 is hygroscopic — opened bags should be resealed and consumed promptly. Recommended storage temperature: below 35°C. Shelf life is 24 months in original sealed packaging.