Overview of Fumed Silica

Fumed silica, also known as pyrogenic silica, is an ultra-fine, high-purity amorphous silicon dioxide (SiO2) produced via the combustion of silicon tetrachloride in an oxygen-hydrogen flame. It appears as a fluffy white powder and is valued for its ability to thicken, stabilize, and reinforce materials.

Features of Fumed Silica

• High Surface Area: Typically ranges from 50 to 380 m²/g, providing excellent thickening and reinforcing properties.
• Hydrophilic or Hydrophobic Variants: Available in both forms depending on surface treatment, allowing for tailored applications.
• Excellent Thixotropy: Increases viscosity and improves flow properties of liquids and pastes.
• Chemical Inertness: Resistant to most chemicals, making it suitable for a wide range of industrial uses.

•  Enhances free-flowing properties and stability.

(Silicon dioxide fumed silica for silicone rubber)

Specification of Silicon dioxide fumed silica for silicone rubber

Silicon dioxide fumed silica acts as a crucial additive in silicone rubber manufacturing. It boosts mechanical toughness and boosts performance. The material is a great white powder made by vaporizing silicon tetrachloride in a flame. This process develops fragments with high area and low thickness. The primary role of fumed silica in silicone rubber is reinforcement. It improves tear resistance, tensile toughness, and longevity. The item functions by developing a network within the rubber matrix, boosting architectural stability.

Fumed silica for silicone rubber normally has an area between 100 and 400 m ²/ g. Higher surface area qualities supply stronger support but may thicken the rubber more. Particle dimension ranges from 5 to 50 nanometers. Smaller sized bits improve dispersion but require cautious blending to prevent clumping. The material is offered in hydrophilic and hydrophobic forms. Hydrophilic fumed silica takes in dampness, making it ideal for general-purpose applications. Hydrophobic types are surface-treated to repel water, appropriate for rubber revealed to moist problems.

Purity levels surpass 99.8%, making certain minimal contamination. Trace steels like iron or aluminum are maintained below 50 ppm. This avoids staining or early aging in the end product. The pH of hydrophilic fumed silica is neutral, around 3.7 to 4.3. Hydrophobic variants might have a little greater pH due to surface therapy. Mass thickness varies from 30 to 60 g/L, impacting handling and storage space. Reduced mass thickness calls for larger containers however streamlines mixing right into rubber.

Fumed silica enhances silicone rubber’s thermal security. It aids the material withstand temperatures from -50 ° C to 250 ° C. Electric insulation properties remain unaffected, making it ideal for wires or seals. The additive likewise enhances resistance to oils, chemicals, and UV radiation. Properly dispersed fumed silica stops sagging or contortion in uncured rubber. This ensures regular processing during molding or extrusion. Makers readjust fumed silica content based on wanted hardness and adaptability. Regular usage varieties from 5% to 20% by weight. Overloading might cause brittleness or handling difficulties.

Storage space referrals consist of maintaining the powder dry and sealed. Dampness absorption reduces performance in hydrophilic qualities. Handling needs dust control measures because of great bit size. Workers should make use of masks to stay clear of breathing. Packaging options include multi-layer paper bags or mass containers. Shelf life goes beyond two years when saved correctly.

(Silicon dioxide fumed silica for silicone rubber)

Applications of Silicon dioxide fumed silica for silicone rubber

Silicon dioxide fumed silica is a vital additive in silicone rubber production. It boosts performance across industries. The material improves stamina and adaptability in silicone items. This makes silicone rubber last much longer under tension. Fumed silica works by creating a network within the rubber matrix. This framework withstands tearing and extending.

Fumed silica regulates the flow of silicone throughout processing. It avoids the rubber from coming to be as well drippy before healing. This is critical for applications requiring accurate shaping. Suppliers utilize it in mold and mildews for seals, gaskets, and insulation components. The additive ensures details remain sharp throughout production.

Warmth resistance is an additional significant advantage. Silicone rubber with fumed silica takes care of extreme temperature levels without breaking down. This suits auto and aerospace components. Engine parts, exhaust systems, and thermal shields often count on this security. Electronic devices also profit. The material secures circuits and sensing units from overheating.

Fumed silica improves electric insulation in silicone rubber. It prevents current leak in high-voltage environments. Power line, ports, and shielding finishes utilize this attribute. The additive lowers fire threats by resisting triggers and brief circuits.

Chemical resistance is enhanced with fumed silica. Silicone rubber becomes more long lasting versus oils, acids, and solvents. Clinical devices like tubing and seals utilize this high quality. The material holds up against repeated sterilization without breaking down.

Transparency issues in optical and lighting applications. Fumed silica maintains silicone rubber clear while adding toughness. LED covers and lens coatings preserve illumination and durability.

Processing performance raises with fumed silica. It aids silicone mix uniformly and release air bubbles. This reduces defects in final products. Manufacturers save time and products during manufacturing.

Fumed silica adapts to diverse industry requirements. It balances solidity and flexibility in silicone rubber. Footwear soles, commercial rollers, and shock absorbers use this balance. The additive makes sure items perform reliably under everyday wear.

Weather condition resistance is an additional benefit. Silicone rubber with fumed silica withstands UV light, rainfall, and temperature level swings. Outdoor cable televisions, roof covering seals, and photovoltaic panel coatings depend on this security.

The great particles of fumed silica produce a smooth surface area finish. This is vital for medical implants and food-grade silicone. The material satisfies rigorous safety and security and health requirements.

Company Introduction

Welcome to HiphopGalaxy, a trusted global supplier of high-quality silicon dioxide (SiO2) powder, renowned for its exceptional purity and performance. Established with a vision to deliver cutting-edge materials that meet the diverse needs of modern industries, we have positioned ourselves as a leading player in the international market.

Our SiO2 powders find applications across multiple sectors, including adhesives, coatings, pharmaceuticals, cosmetics, polymers, and electronics. Each application benefits from the unique properties of our products—high surface area, excellent thixotropy, chemical inertness, and superior reinforcement capabilities. Whether you need hydrophilic or hydrophobic variants, we offer tailored solutions to meet your specific requirements.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of Silicon dioxide fumed silica for silicone rubber

What is fumed silica in silicone rubber?
Fumed silica is a fine powder made from silicon dioxide. It is produced by burning silicon tetrachloride in a hydrogen-oxygen flame. The process creates tiny particles with high surface area. These particles act as a reinforcing filler in silicone rubber. They improve the material’s strength and durability.

Why is fumed silica added to silicone rubber?
Fumed silica boosts the mechanical properties of silicone rubber. It makes the rubber harder to tear or stretch. The powder also thickens the rubber. This stops the rubber from sagging or deforming before curing. Fumed silica helps silicone rubber handle heat and chemicals better. This makes the material suitable for harsh environments.

How much fumed silica is used in silicone rubber?
The typical amount ranges between 5% and 15% by weight. The exact percentage depends on the rubber’s intended use. Higher amounts improve strength but may make the rubber harder to process. Lower amounts keep the rubber flexible. Testing helps find the right balance for specific applications.

Does fumed silica affect the rubber’s transparency?
Yes. Large amounts of fumed silica can make silicone rubber look cloudy. The particles scatter light as it passes through. For clear rubber products, manufacturers use treated fumed silica or lower concentrations. Surface treatments reduce light scattering. This maintains transparency while keeping the benefits of the additive.

Is fumed silica safe in silicone rubber products?
Fumed silica is safe once mixed into silicone rubber. The particles bond tightly with the rubber matrix. They do not leak out during normal use. Handling pure fumed silica powder requires care. Inhaling the dust can irritate the lungs. Workers use masks and gloves when handling the raw powder. Finished silicone rubber products pose no health risks.

(Silicon dioxide fumed silica for silicone rubber)