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Product Description
Characteristics
HJSIL® 300 is a hydrophilic fumed silica with a specific surface area of 300 m2/g.
High surface area fumed silica can effectively improve the transparency of silicone rubber, making it especially suitable for applications that require high transparency, such as medical devices and baby bottle nipples. It enhances the material's clarity and transparency by reducing light scattering.
High surface area fumed silica can enhance the mechanical properties of silicone rubber, including tensile strength, tear resistance, and wear resistance. It provides a stronger framework for silicone rubber, improving its strength and durability, making it suitable for applications that require high mechanical strength.
Fumed silica has good thermal stability. High surface area fumed silica can improve the stability of silicone rubber in high-temperature environments, ensuring that the material retains its properties even under high-temperature conditions, making it ideal for high-temperature sealing, electronic components, and other applications.
High surface area fumed silica can improve the aging resistance of silicone rubber. It effectively resists the effects of UV rays, oxidation, and other environmental factors, extending the material's lifespan while maintaining the rubber's flexibility and performance, especially suitable for outdoor and demanding applications.
High surface area fumed silica can significantly enhance the electrical insulation properties of silicone rubber, playing an important role in the electrical and electronics fields. It improves the insulation performance of silicone rubber, widely used in cables, electronic encapsulations, and other electrical products.
The use of modified fumed silica in liquid silicone rubber can effectively improve flowability, enhance dispersion, reduce viscosity, and optimize rheological properties. Through surface modification, fumed silica can enhance the mechanical properties of the material while maintaining its flowability, ensuring better flow and processability during manufacturing.
When HJSIL is added to a system, it significantly enhances the viscosity, helping the product reach a specific thickness to ensure performance, while typically not altering other properties of the system. In coatings and adhesives, thickening can prevent material sagging or dripping during application.
HJSIL 300 has excellent thixotropic properties, which are especially useful in applications that require easy operation during use (where viscosity decreases under shear, making it easy to apply) but need to maintain stability after standing (where viscosity increases, preventing sagging). For example, in coatings and gels, thixotropy prevents dripping or sagging during application while allowing smooth application and uniform coverage.
High surface area fumed silica like HJSIL 300 significantly improves the transparency of silicone rubber, making it ideal for applications that demand high clarity, such as medical devices and baby bottle nipples. It increases the material's transparency by minimizing light scattering.
Characteristic physico-chemical data
Properties and test methods | Unit | Typical Value | Standardization |
Specific surface area (BET) | m²/g | 300 ± 25 | GB/T10722 |
pH value (in 4% dispersion) | 3.6 ~ 4.5 | GB/T1717 | |
Loss on drying (2 hours at 105°C) | Wt% | ≤ 1.5 | GB/T5211.3 |
Loss on ignition |
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Sieve residue (45 μm) | % | ≤ 0.05 | GB/T5211.14 |
Silica content (based on ignited material) | Wt% | ≥ 99.8 | GB/T20020 |
Tamped density (based on material dried for 2 hours at 105°C) | g/L | 40 ~ 60 | GB/T5211.4 |
Carbon content (based on material dried for 2 hours at 105°C) | Wt% | ≤ 0.2 | GB/T20020 |
HTV and RTV silicone rubber
Adhesives and sealants
Paints and coatings
Cosmetics
Packaging and storage
HJSIL® 300 is supplied in 10kg kraft paper bags. We recommend to store the product in closed containers under dry conditions and to protect the material from volatile substances.
1. How can I place an order?
Placing an order is straightforward—simply send us an inquiry, and our professional sales team will offer a customized solution within 24 hours.
2. What are your payment terms?
Our main payment methods include T/T, L/C, and D/P. For specific payment details, please confirm with our sales team when placing your order.
3. What is the annual capacity for silicon dioxide?
Henan Minmetals East Silicon Industry Co., Ltd. is a professional manufacturer with expertise in research, development, production, and marketing of high-end silica products. With a strong technological base and a well-integrated industrial supply chain, the company has an annual production capacity of 8,000 tons of fumed silica and 30,000 tons of precipitated silica, positioning itself as one of China’s largest silica suppliers.
4. What is the lead time?
We aim to arrange deliveries promptly based on our manufacturing schedule. However, factors such as shipping schedules may affect delivery times. For precise information, please check with our sales team when placing your order.
