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Filler (Silica) Component – Rubber and Plastic Product Manufacturing

Component Specifications

Definition

Fumed or precipitated silica used as a reinforcing filler in powder silicone resin formulations to improve mechanical strength, thixotropy, and anti-caking properties. It is a high-purity amorphous silicon dioxide with controlled particle size and surface treatment.

Working Principle

Silica particles disperse in the resin matrix, forming hydrogen bonds with polymer chains, increasing viscosity and providing structural reinforcement. Surface silanol groups interact with resin functional groups, enhancing crosslinking density.

Materials

Amorphous silicon dioxide (SiO2), fumed or precipitated, with specific surface area 150-400 m²/g, primary particle size 7-40 nm, and surface treatment (e.g., hydrophobic with silanes).

Technical Parameters

SiO2 Content ≥ 99.8%
Loss on Drying ≤ 1.5%
Tapped Density 50-80 g/L
pH (5% slurry) 3.5-4.5
Specific Surface Area (BET) 200 ± 25 m²/g

Standards

ISO 3262-20, ASTM D6738

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Filler (Silica).

Parent Products

This component is used in the following industrial products

Powder Silicone Resin

A solid, powdered form of silicone resin used as a high-performance coating, adhesive, or additive material.

View Product Details

Engineering Analysis

Risks & Mitigation

Respiratory irritation if inhaled as dust
Potential for agglomeration if not properly dispersed

FMEA Triads

Trigger: Insufficient dispersion
Failure: Poor mechanical properties and surface defects
Mitigation: Use high-shear mixing and optimize mixing time

Trigger: Moisture absorption
Failure: Reduced reinforcement and caking
Mitigation: Store in sealed containers with desiccant

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±5% on specific surface area

Test Method

BET nitrogen adsorption (ISO 9277)

Buyer Feedback

★★★★☆ 4.8 / 5.0 (22 reviews)

"Testing the Filler (Silica) now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Rubber and Plastic Product Manufacturing sector, I confirm this Filler (Silica) meets all ISO standards."

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Frequently Asked Questions

What is the typical loading of silica filler in silicone resin?

Typically 5-30% by weight, depending on desired viscosity and mechanical properties.

Can hydrophobic silica be used in water-based systems?

No, hydrophobic silica is designed for non-polar systems; hydrophilic silica is used in water-based formulations.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Filler (Silica)