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.

(Hydrophilic and Hydrophobic Fumed Silica 99% Sio2 Content Fine White Fumed Precipitated Silica Powder for Rubber)

Specification of Hydrophilic and Hydrophobic Fumed Silica 99% Sio2 Content Fine White Fumed Precipitated Silica Powder for Rubber

This fine white powder is fumed silica. It has 99% silicon dioxide content. This high purity matters. The product comes in two main types. One type is hydrophilic. The other type is hydrophobic. Both types are used heavily in rubber manufacturing.

Hydrophilic fumed silica attracts water. It has many surface hydroxyl groups. This makes it very reactive. In rubber compounds, it acts as a strong reinforcing filler. It improves tensile strength significantly. It also boosts tear resistance. The powder is very fine. This gives a large surface area. Large surface area means better interaction with rubber molecules. This interaction improves mechanical properties. It helps control viscosity during processing too. The powder is amorphous. This structure is key for its performance.

Hydrophobic fumed silica is different. Its surface is treated. This treatment reduces water attraction. It repels moisture instead. This surface modification changes how it behaves in rubber. Hydrophobic silica disperses more easily in rubber. It reduces compound viscosity. Lower viscosity makes processing smoother. It also absorbs less moisture from the air. Low moisture absorption is critical for some applications. It prevents bubbles during high-temperature curing. Electrical insulation properties can be better too. The hydrophobic surface improves compatibility with certain polymers.

The particle size is extremely small. Typical particle diameters are nanometers. The powder looks like a fluffy white dust. Its bulk density is low. Both hydrophilic and hydrophobic grades are available. Choosing the right type depends on the rubber application. Hydrophilic silica gives maximum reinforcement. Hydrophobic silica offers easier processing and moisture resistance. Both types enhance key rubber properties. They improve durability and performance. This silica powder is a vital additive for quality rubber products.

(Hydrophilic and Hydrophobic Fumed Silica 99% Sio2 Content Fine White Fumed Precipitated Silica Powder for Rubber)

Applications of Hydrophilic and Hydrophobic Fumed Silica 99% Sio2 Content Fine White Fumed Precipitated Silica Powder for Rubber

Hydrophilic and hydrophobic fumed silica powder is 99% pure silicon dioxide. It looks like a fine white powder. This material is very important for making rubber products better. It works in different ways depending on its surface treatment.

Hydrophilic fumed silica loves water. It has many OH groups on its surface. This type is great for reinforcing many rubber compounds. It makes the rubber much stronger. The rubber gets better tear resistance. It also improves abrasion resistance. This means rubber parts last longer. Hydrophilic silica thickens liquid rubber systems well. It stops settling of fillers. This keeps mixtures stable. It is a common choice for mechanical rubber goods. Think of seals and gaskets. Think of hoses and belts. It helps these products handle stress. It improves their durability.

Hydrophobic fumed silica hates water. Its surface is treated with special agents. This coating makes it repel water. This property is key for silicone rubber. Hydrophobic silica mixes easily into silicone. It prevents the silicone from becoming sticky. It gives silicone rubber excellent reinforcement. The rubber stays strong and flexible. Hydrophobic silica also helps in special situations. It works well in rubber exposed to water or high humidity. It keeps properties stable. It is vital for high-performance seals. It is vital for cable insulation needing water resistance. This silica improves processing. It makes extrusion and molding easier. It reduces problems with air bubbles. It gives a smoother surface finish.

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 Hydrophilic and Hydrophobic Fumed Silica 99% Sio2 Content Fine White Fumed Precipitated Silica Powder for Rubber

Here are common questions about our Hydrophilic and Hydrophobic Fumed Silica 99% SiO2 for Rubber:

What is this silica powder?
This is a very fine white powder. It contains 99% silicon dioxide (SiO2). We offer two types: hydrophilic (water-attracting) and hydrophobic (water-repelling). Both are made using advanced processes.

Why use this silica in rubber?
This silica greatly improves rubber properties. It makes rubber stronger and more tear-resistant. It helps rubber last longer. It controls how thick the rubber mix is during processing. It makes the final rubber product better.

What’s the difference between hydrophilic and hydrophobic silica?
Hydrophilic silica works well with water or polar materials. Hydrophobic silica resists water. It bonds better with rubber that doesn’t like water. Choose hydrophilic for general use. Choose hydrophobic when water resistance is critical, like in seals or outdoor products.

How much silica should I add?
The amount varies. It depends on the rubber type and the properties you need. Typical use is between 5% and 30% of the rubber mix weight. Start with a lower amount. Test it. Adjust based on your results. We can help suggest starting points.

Is it safe to handle?
Handle it carefully. It is a very fine powder. Avoid breathing the dust. Use good ventilation. Wear a dust mask and safety glasses. Follow standard industrial hygiene practices for fine powders. Check the Safety Data Sheet (SDS) for full details.

(Hydrophilic and Hydrophobic Fumed Silica 99% Sio2 Content Fine White Fumed Precipitated Silica Powder for Rubber)