Description

Buy Silica for composites (SFJ-CL) – Filler for High-Performance Composites

SFJ-CL: Enhanced Compatibility for High-Performance Composites

SFJ-CL is a high-purity crystalline silica for composites that has been surface-treated with a proprietary coating agent. This advanced treatment transforms the silica from hydrophilic to hydrophobic, dramatically improving its dispersion, wetting, and interfacial bonding within polymer and resin systems. The result is a high-performance reinforcing filler that enhances mechanical properties, improves processing, and increases the durability of the final composite. SFJ-CL is the ideal solution for applications demanding superior strength, environmental resistance, and low resin uptake.

Key Features & Benefits

• Enhanced Polymer Compatibility: The surface coating promotes excellent adhesion between the silica and the resin matrix (e.g., epoxy, polyurethane, polyester), leading to superior mechanical strength.
• Hydrophobic & Low Moisture Absorption: Repels water, which is critical for improving electrical insulation properties, reducing blistering in coatings, and enhancing long-term durability in humid environments.
• Improved Mechanical Properties: Increases the tensile strength, flexural modulus, and impact resistance of composites by ensuring a stronger filler-matrix bond.
• Significantly Lower Resin Demand: The hydrophobic surface allows for easier wetting and dispersion, leading to lower viscosity at high loading levels and reducing the overall consumption of expensive resins.
• Uniform Particle Size: Carefully graded aggregate ensures consistent performance, predictable packing density, and uniform appearance in decorative applications.
• Exceptional Hardness & Purity: Retains the inherent 7 Mohs hardness and high SiO₂ purity of the base mineral, guaranteeing excellent scratch, abrasion, and chemical resistance.

Primary Applications

• Polymer Composites: An ideal reinforcing filler for epoxy, polyester, and polyurethane systems to enhance mechanical strength and durability.
• Industrial & Decorative Flooring: Used in broadcast systems and trowel-down epoxy/PU mortars to create highly durable, anti-slip, and decorative surfaces.
• Engineered & Artificial Stone: The primary aggregate in the production of quartz countertops and surfaces, providing hardness, aesthetics, and low resin demand.
• High-Performance Grouts & Mortars: Improves the strength, chemical resistance, and workability of specialty construction chemicals.
• Potting & Encapsulation Compounds: Enhances thermal conductivity and electrical insulation properties in electronic potting applications.

Packaging

SFJ-CL is supplied in moisture-resistant packaging to protect the integrity of the surface treatment:

• 25 kg multi-layer paper or poly-woven bags
• 1-ton (1000 kg) lined bulk bags / FIBCs