|
HS Code |
377195 |
| Product Name | HIFULL HL-90 Hydrophilic Fumed Silica |
| Bet Surface Area | 100 m²/g |
| Appearance | White, amorphous powder |
| Primary Particle Size | 7-16 nm |
| Ph Value | 3.6-4.5 (in 4% aqueous dispersion) |
| Loss On Drying | <1.5% (at 105°C, 2 hrs) |
| Sio2 Content | ≥99.8% |
| Bulk Density | 30-60 g/L |
| Silanol Group Content | High |
| Specific Gravity | 2.2 g/cm³ |
| Refractive Index | 1.46 |
As an accredited HIFULL HL-90 Hydrophilic Fumed Silica (BET=100㎡/g) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HIFULL HL-90 Hydrophilic Fumed Silica (BET=100㎡/g) is packaged in 10kg double-layer kraft paper bags with inner plastic lining. |
| Container Loading (20′ FCL) | 20′ FCL can load approximately 3,000 kg of HIFULL HL-90 Hydrophilic Fumed Silica (BET=100㎡/g) in 10kg bags. |
| Shipping | **Shipping Description:** HIFULL HL-90 Hydrophilic Fumed Silica (BET=100㎡/g) is shipped in 10 kg or 20 kg net weight bags, securely sealed and palletized to prevent moisture absorption and contamination. Store and transport in a cool, dry place. Handle gently to avoid dust formation. Complies with standard chemical shipping regulations. |
| Storage | **HIFULL HL-90 Hydrophilic Fumed Silica (BET=100㎡/g)** should be stored in a cool, dry, and well-ventilated area, away from moisture and incompatible substances. Keep the container tightly closed to prevent contamination and absorption of atmospheric moisture. Avoid sources of ignition and direct sunlight. Use appropriate personal protective equipment when handling to minimize dust generation and inhalation. |
| Shelf Life | HIFULL HL-90 Hydrophilic Fumed Silica has a shelf life of 2 years if stored in a dry, unopened container. |
Applications of HIFULL HL-90 Hydrophilic Fumed Silica (BET=100㎡/g) in Industrial ManufacturingAs an industrial manufacturer, we supply HL-90 hydrophilic fumed silica to meet the technical requirements of advanced downstream industries. Our product supports performance and production consistency in key sectors that rely on tight formulation controls and regulated processes. Below we detail real-world application scenarios with specific compliance, process, ratio, and product information for each downstream field. 1. Silicone Sealant FormulationLeading producers of silicone sealant require consistent rheology control and anti-sag properties in one-component and two-component systems. HL-90 hydrophilic fumed silica serves as a reinforcing agent, improving thixotropy and viscosity stability even under temperature fluctuations. The fine particle size distribution ensures homogeneous dispersion in polydimethylsiloxane matrices, supporting formulation workability and storage stability in construction and automotive seals. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
2. Industrial Coatings and PaintsCoating manufacturers use hydrophilic fumed silica as an essential rheology modifier to prevent pigment settling, control flow, and inhibit sagging on vertical surfaces. HL-90’s specific surface area supports uniform suspension in water-borne and solvent-borne formulations. Its effectiveness allows formulators to engineer anti-settling behavior in automotive refinish, industrial floor coatings, and protective primers without impacting gloss or film transparency. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
3. Adhesives and Hot Melt SystemsTechnical adhesive and hot melt manufacturers integrate HL-90 to modify tack, enhance dispersion stability, and prevent caking during storage. Its high surface area also assists in controlling melt flow for precise slot-die or bead application. Hydrophilic fumed silica supports non-slump and adjustable open time in construction adhesives, lamination glues, and pressure-sensitive systems exposed to varying humidity profiles. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
4. Industrial Rubber CompoundsRubber compounders utilize HL-90 for reinforcement in technical rubber products, especially where low moisture pickup and reinforcing action are critical. The material interacts with elastomer chains, increasing modulus, abrasion resistance, and dimensional stability. This enhances physical durability and dynamic properties in dynamic and static seals, hoses, rolls, and general fabrication gaskets exposed to cyclic stress and weathering. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
5. Battery and Electronics EncapsulationManufacturers of battery slurries and electronic encapsulation compounds rely on fumed silica to impart thixotropic properties, prevent sedimentation of conductive particles, and maintain insulation stability. HL-90 enables producers to optimize separator coatings, interface layers, and casting pastes for controlled application and defect reduction. Its performance is especially critical in lithium-ion, nickel-metal hydride, and energy storage module production lines. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
6. Toothpaste and Oral Care GelsMajor personal care formulators use HL-90 hydrophilic fumed silica as a mild abrasivity agent and thickener in toothpaste, dental gels, and oral suspensions. Its fine particle grade allows stable viscosity without gritty mouthfeel, ensuring comfortable texture for daily brushing and medical-grade toothpaste variants. Producers select HL-90 for its compatibility with sodium fluoride, herbal extracts, and flavor oils that demand strict control over water content and sedimentation. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
|
Competitive HIFULL HL-90 Hydrophilic Fumed Silica (BET=100㎡/g) prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615651039172 or mail to sales9@bouling-chem.com.
We will respond to you as soon as possible.
Tel: +8615651039172
Email: sales9@bouling-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Over the past two decades of producing high-purity silica, we’ve seen the fumed silica industry move beyond bulk performance and zero in on the subtle differences that drive product quality, ease of handling, and formulation stability. Our HIFULL HL-90 Hydrophilic Fumed Silica (BET surface area: 100㎡/g) stands as a direct result of this mindset. We’ve relied on furnace technology and careful post-treatment, focusing on clean, reproducible silanol groups on the surface, supporting strong hydrogen bonding and predictable rheology behavior.
We manufacture HL-90 in a closed environment using high-grade silicon tetrachloride, introducing water vapor at a controlled rate and temperature. That process gives HL-90 its fine aggregate structure, maintaining an average particle size of roughly the primary particle scale, typically a few dozen nanometers. Each batch falls within a tight range for surface area and moisture content, thanks to our automated feeding and blending system with integrated analytics. Bagging and sealing lines protect from ambient moisture, important for hydrophilic grades which quickly interact with water vapor in air.
Hydrophilicity in fumed silica isn’t a marketing claim; it comes from the high concentration of surface hydroxyl (silanol) groups. On our line, we calibrate those surface silanols through careful furnace humidity and precursor feeding. HL-90’s surface area of 100㎡/g falls in a range that straddles optimal flow modification and dispersion improvement in a wide array of matrices. Coatings, adhesives, sealants, unsaturated polyester resins, and even silicone elastomers all draw on fumed silica to control rheology, prevent sag, and suppress sedimentation. For liquid and semi-solid systems, the difference between stable viscosity and hard settling often depends on the right silica.
We’ve had formulators walk into our pilot lab asking why the same loading of HL-90 gives a thixotropic, clean finish where a cheaper silica leaves streaks or clumping. It isn’t just about the BET number. The degree of aggregation, purity profile, least detectable metal contaminant, and the absence of organic residue all play into it. On our HL-90 line, we sieve and analyze for everything from iron to zinc, since metal traces can poison catalysts or yellow resins. After drying, every drum leaves the plant with below-ppm levels of heavy metals. We skip any organic post-treatments, so chemists can know exactly what they’ve got: unadulterated hydrophilic silica.
One challenge with fumed silica is dust control and clumping during mixing. Our team built HL-90 with a density and aggregate strength that stays manageable during pneumatic or screw-feeder transfers. We hear from adhesive makers that they can run HL-90 for longer between filter cleaning because finer, softer dust doesn’t overload their dust collectors. Once in a solvent or resin, HL-90’s aggregate structure breaks down swiftly under high shear; you see fast wetting and a creamy dispersion, not a dust cloud or stubborn lumps. The real test comes in epoxy or PU systems where dispersant addition is tricky—HL-90 allows strong network formation at relatively low loadings, so batch-to-batch consistency stays high.
During development, we spent months trialing HL-90 with regional sealant makers who see tough climates and field failures. They reported back that pastes stayed workable and color-stable after months under sunlight, with none of the syneresis or separation they used to see with commodity silica or silica of lower purity. Those practical results pushed us to standardize our air classification method to maintain a balance between aggregate size and pourability, so drums arrive easy to handle, never caked or fused.
Many fumed silicas on the market cluster around three performance levels: high-surface-area types above 200㎡/g, mid-range types such as HL-90 at 100㎡/g, and engineered low-activity types below 50㎡/g. The high-activity products (above 200㎡/g) turn up in applications such as thickening precious metal slurries or controlling microvoids in advanced composites, but these require more energy to disperse and tend to spike viscosity at low addition rates. In practice, these sometimes lock up the formulation’s flow before achieving the networking needed for stability, especially in high-solids, high-build paints.
Sub-50㎡/g grades, produced intentionally with low silanol density, behave more like fillers than true rheology modifiers. HL-90 avoids the brittleness and hardness of these lower-surface grades. That matters for users seeking balance—thixotropy without excessive hardness, storage-stable flow, and high film-build in coatings. HL-90’s performance lands squarely in the sweet spot needed across industrial adhesives, construction sealants, and technical textile coatings—materials intended to last, with little tolerance for batch inconsistency or downstream failure.
Pharmaceutical and food-grade silicas use a different path, with elevated controls, tailored particle size distributions, and rigorous documentation needed for direct contact or ingestion. HL-90 is a technical-industrial grade and draws on raw materials we qualify for maximum purity, but we do not run it through processes meant for strict pharma or food application. That line clarity lets application chemists select the right tool with knowledge of both capabilities and limitations.
Some purchasers still ask why hydrophilic is preferable over hydrophobic fumed silica. Hydrophilic silica brings strong polarity, creating hydrogen bonding within organic and inorganic matrices. This encourages shear-thinning—for instance, making a paint easy to brush but stable in storage. Hydrophobic grades, modified with organosilanes, favor water resistance or sequestering in oily phases, such as in personal care creams or defoamers. Manufacturing HL-90 with zero hydrophobic surface groups allows it to interact maximally with polar and hydrogen-bonding solvents.
Hydrophilic fumed silica like HL-90 loves to absorb atmospheric humidity if left exposed. On-site, we train customers to re-seal bags immediately after opening and store drums off slab floors. We ship with moisture scavenging packets as insurance for long-distance transport, and every lot undergoes pre-shipment Karl Fischer titration to ensure water pickup stays in check. Fresh material blends into resins and oil-based matrices with no adverse gelling, but left in open air for hours, powder can clump or cake. Good handling practices save headaches downstream.
During HL-90’s pilot development, our chemists spent long days running real-world paint, adhesive, and sealant recipes. Our feedback loop ran straight from customer plant trials back into process optimization. We found that blending HL-90 typically doesn’t demand amphiphilic auxiliaries or elaborate pre-wetting. A good Cowles dissolver or high-shear rotor/stator usually brings the silica into full action in under fifteen minutes, even at moderate loading levels. Where customers once used pre-blending or staged silica addition, HL-90 allowed simpler, more reliable batch make-up.
One frequent question we receive concerns long-term sag resistance. HL-90 creates a house-of-cards network by hydrogen bonding between silanol groups and matrix components. This network rebuilds as soon as shear leaves the system. We’ve monitored three-year-old cured joints with no sign of sag re-emergence or migration, even after exposure to freeze-thaw or high-heat cycling.
Epoxy floor and wall coatings demand transparency, color stability, and resistance to settling of heavy pigments. HL-90 proved its capability in these demanding lines, where pure mineral fillers would settle or dull the topcoat. In unsaturated polyester, especially for composite panel resins, HL-90 increases viscosity without killing pot life. That balance lets processors inject high-solids pastes without promoting stratified gels or hard lumps.
Our technical team has run HL-90 through pigment dispersions, thickened alkyd varnishes, alcohol-based sealers, moisture-cured polyurethanes, and a host of modified acrylics. We’ve found that starting doses of 0.5-1.5 weight percent handle resin thickening chores in most systems; past 2 percent, rheology control approaches diminishing returns. This performance band reflects HL-90’s ability to physically bond the matrix without overwhelming it.
We work with textile coaters needing precisely rheology-tuned backings—HL-90 lets them tune flow for knife-over-roll or screen-coating steps. Similarly, in construction sealants, selecting HL-90 makes the difference between gun-grade and self-levelling properties. We’ve stood by operators running triple-shift campaigns, and their feedback shapes every production campaign.I
The benefit of HL-90 in industrial lubricants and greases also surfaces—lithium-based thickeners and calcium soaps benefit from the colloidal network HL-90 can build, improving oil retention during service. We have chain lubricant compounders in industrial machinery praise the clear separation resistance HL-90 brings, which was hard to replicate with other grades. That real-world voice means more to us than catalogue claims.
HL-90, as a pyrogenic (flame hydrolysis-derived) silica, carries no crystalline silica (quartz) hazard; our SiO₂ exists solely in the amorphous phase. That distinction matters: regulatory frameworks in North America, the European Union, and most of Asia restrict use of respirable crystalline silica but do not flag amorphous grades produced via flame methods. Our team runs constant X-ray diffraction screening to verify crystalline content never appears during production anomalies.
On-site, dust minimization remains best practice, and our customers invest in ventilation, sealed feeders, and vacuum ground cleaning. HL-90’s fine particle size makes it necessary to monitor airborne exposure through regular industrial hygiene checks. At loading and mixing, full PPE (nitrile gloves, N95 masks, hooded coveralls) meets the recommendations laid out by global occupational health agencies. As regulatory focus on ultrafine particles grows, we adjust our guidance and packaging accordingly—for instance, our new antistatic-lined bags have seen strong demand among multinational buyers meeting updated EU directives.
Increasingly, end users ask about recycled content, carbon emissions, and “green chemistry.” Our HL-90 plant has incorporated two-stage acid scrubbing and closed water loops to cut waste streams. We also use process heat recovery from the flame stage, so our overall carbon emissions per kilo of finished product have dropped versus previous generations. While silica itself neither leaches nor emits hazardous substances, minimizing production waste speaks to the long view our clients take on sustainable formulations.
End users benefit from clarity about what HL-90 can and cannot do. Where ultra-high surface area silica (BET >200㎡/g) proves hard to disperse and often surges viscosity too early, HL-90 serves as the go-to for mid-range thickening, stable suspension, and ease of pumping. It runs in lines that value reliable, medium-level thixotropy and don’t require extensive dispersant packages or anti-settle strategies. We steer customers who want water repellency or use in harsh aqueous conditions toward our hydrophobic lines; HL-90 doesn’t carry surface silylation, so direct use in water-rich media creates strong, stable gels but not water repellency.
Lower surface area grades have a role as well. Rubber compounding or commodity adhesive manufacturers sometimes prefer a coarser silica if high loadings without excessive thickening matter most. Our HL-90 often steps in where paste viscosity needs a bump but must not stiffen past the processing window during application.
The dividing line comes down to how much structure, flow control, and clarity a customer requests. We have seen customers try cheaper, generic fumed silicas, only to return as HL-90 yielded fewer defects, smoother textures, and more predictable finished part properties. Many of our resin and sealant users report reduced lot-to-lot troubleshooting and less rework, thanks to HL-90’s clean trace element profile and tight particle size control.
The most valuable feedback for us comes from line operators, R&D chemists, and plant managers who blend HL-90 every week. They tell us which grades lead to pump issues, which clump during silo transfers, or when a new application challenges standard approaches. We take what we hear—good and bad—back to our R&D, process, and operations teams. Improvements in packaging, in-line filtering, and quality control emerge from those direct connections.
As an upstream manufacturer, we focus on process transparency, including open test protocols and pilot batch supply for large-scale trials. HL-90’s specifications aren’t an afterthought—they result from dozens of formulation trials, scale-up campaigns, and troubleshooting sessions with real users facing real deadlines. By engaging directly, rather than relying on resellers or brokers, we respond to field realities rather than catalogue theorizing.
HL-90 Hydrophilic Fumed Silica draws upon years of applied experience, operator stories from the field, and focused manufacturing controls. The product reflects our efforts to put practical formulation needs at the center—delivering robust, batch-stable viscosity modification, clean dispersibility, and reproducible consistency in tough, process-intense environments. We built HL-90 as a partner for the industry, not just as another commodity silica. Partnership with users in coatings, adhesives, sealants, resins, and specialty fluids ensures the product continues to adapt and deliver, campaign after campaign.
