Zero Wax — Clean Film Chemistry
Leather finishing chemistry tolerates no compromises. HMMAT 100 Series is the untreated silica choice — no organic wax, no surface modifier — delivering a pure silica-to-binder interface in ultra-thin finish films of 5–15 µm. Wax-treated grades that perform acceptably in thicker industrial films cause tacky feel, delamination risk, and topcoat adhesion failures at these extreme film thicknesses.
High Transparency at 5–15 µm DFT
Leather grain and colour must remain fully visible through the finish. HMMAT 100 offers a broad d50 range from 3 to 18 µm, enabling precise particle-size-to-DFT matching. In the 5–12 µm thin-film window, sub-grades with d50 3–6 µm scatter light below the human perception threshold — reducing gloss to the target level while keeping the leather substrate visually brilliant and colour-accurate.
Silky Dry Hand That Endures
The micro-texture created by HMMAT 100 particles at the film surface — without any migrating wax boundary layer — produces the characteristic dry, silky hand demanded by premium footwear, handbag, and automotive leather OEM brands. This tactile effect is chemically stable and resistant to flexing, moisture, and repeated abrasion throughout the product lifecycle.
OEM Volume Supply for Leather Finish Lines
Leather finishing plants running continuous roll-coat or spray lines consume silica matting agents in quantities that demand FCL economics and specification consistency. SEMITECH supplies HMMAT 100 in 20 MT FCL with locked d50 and BET surface area windows, private-label bags, and multi-port FOB — supporting your line speed, not constraining it.
OEM Supply Capabilities
- Private-Label Packaging: 25 kg multi-wall paper bags, custom brand print, product codes and language
- Minimum Order: 1 FCL (20 MT), scaling to multi-FCL contracts
- Certifications: ISO 9001 + REACH + SVHC Declaration + leather industry CoA format (d50, BET, pH, oil absorption)
- Lead Time: 25–35 days first run, 15–20 days repeat orders
- Multi-Port: Shanghai, Ningbo, Tianjin FOB
Grade Selector for Leather Coatings
Sub-grade selection within HMMAT 100 is guided by film thickness and target matte depth.
| Grade | d50 / Treatment | DFT Range | Application Fit |
|---|---|---|---|
| HMMAT 140 | 3–4 µm / untreated | 5–10 µm | Ultra-thin topcoat, maximum transparency |
| HMMAT 155 | 5–6 µm / untreated | 8–15 µm | Standard PU leather finish, silky hand |
| HMMAT 100 (mid) | 8–10 µm / untreated | 12–25 µm | Thicker leather coatings, deep matte |
| HMMAT 100 (coarse) | 14–18 µm / untreated | 20–40 µm | Structured texture leather applications |
Technical FAQ
Leather coating formulation challenges and HMMAT 100 performance answers.
+Why must leather coating matting agents be wax-free?
In ultra-thin leather finish films (5–15 µm), wax-treated silica particles can migrate to the surface and create a greasy or tacky feel that disrupts the silky hand leather buyers demand. Wax can also interfere with subsequent topcoat adhesion and cause delamination in flexed leather applications. HMMAT 100 Series is untreated, guaranteeing zero wax contamination and a clean silica-to-binder interface at any film thickness.
+How does HMMAT 100 achieve high transparency in thin leather films?
HMMAT 100 Series offers d50 options from 3 to 18 µm, allowing formulators to precisely match particle size to DFT. In thin leather films (5–15 µm), finer sub-grades with d50 3–6 µm scatter light at a scale below the human perception threshold, delivering effective gloss reduction while maintaining maximum transparency and colour clarity of the leather substrate below.
+What binder systems is HMMAT 100 compatible with for leather finishes?
HMMAT 100 untreated silica is compatible with polyurethane (PU) dispersion topcoats, acrylic emulsion systems, nitrocellulose lacquers, and solvent-borne PU systems widely used in leather finishing. Its neutral surface chemistry does not interfere with crosslinker packages (aziridine, carbodiimide, isocyanate) used in high-performance PU leather topcoats.
+How does HMMAT 100 contribute to the silky tactile feel demanded by luxury leather brands?
The controlled surface roughness created by HMMAT 100 particles — without any waxy boundary layer — produces a dry, smooth micro-texture at the film surface. This micro-texture reduces static friction and gives the characteristic silky-dry hand of premium leather finishes. The absence of wax migration ensures the tactile effect is durable and consistent throughout the product lifecycle.
+What is the minimum FCL order for HMMAT 100 and what private-label options are available?
Minimum order for HMMAT 100 Series is 1 FCL (20 MT). Private-label packaging is available in 25 kg multi-wall paper bags with custom printing of your brand name, product code, and language. Documentation includes CoA (particle size, BET surface area, oil absorption, pH), SDS/MSDS, REACH compliance letter, and batch traceability record.
Recommended Leather Coating Solution
For ultra-thin leather finish films requiring zero wax contamination, high transparency, and silky tactile performance, we recommend the HMMAT 100 Series.
SEMITECH matrix · co-purchase