| HS Code | 662820 |
| Material | soda-lime borosilicate glass |
| Shape | spherical |
| Average Particle Size | 5-1000 microns |
| Color | transparent or white |
| Density | 2.4–2.6 g/cm³ |
| Refractive Index | 1.50–1.52 |
| Crushing Strength | 35,000–70,000 psi |
| Chemical Resistance | high (alkalis, acids, water) |
| Thermal Conductivity | 1.0 W/m·K |
| Melting Point | around 1400°C |
| Bulk Density | 0.7–1.2 g/cm³ |
| Surface Area | very low (smooth surfaces) |
| Moisture Absorption | negligible |
| Solubility | insoluble in water |
| Electrical Conductivity | non-conductive |
As an accredited Solid Glass Microspheres factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 25kg bag |
| Container Loading (20′ FCL) | 20′ FCL loads 12 metric tons of Solid Glass Microspheres, packed in 25kg bags on pallets, ensuring safe, contamination-free transport. |
| Shipping | Shipping Description: Solid Glass Microspheres are packed in sealed, durable containers to prevent breakage and contamination. Packages are cushioned with protective padding and clearly labeled. Classified as non-hazardous, they are shipped via standard ground or air freight, following all applicable transport regulations to ensure safe and efficient delivery. |
| Storage | Solid Glass Microspheres should be stored in a cool, dry, and well-ventilated area, away from moisture and incompatible substances. Keep the container tightly sealed to prevent contamination. Store away from strong acids, alkalis, and hydrofluoric acid. Use original packaging or appropriate, clearly labeled containers. Avoid generating dust and ensure storage facilities are equipped for easy spill containment and cleanup. |
| Shelf Life | Solid Glass Microspheres generally have an unlimited shelf life if stored in a dry, contaminant-free environment, away from excessive moisture. |
As a dedicated manufacturer of solid glass microspheres for technical and industrial fields, we deliver materials engineered for the evolving requirements of advanced manufacturing. The following application scenarios highlight the verified downstream uses where our microspheres contribute measurable value, demonstrating the integration of our raw materials in key industrial sectors.
Automotive OEMs and Tier 1 suppliers have increased microsphere incorporation into polymer composites to address vehicle mass reduction targets alongside mechanical performance. These additives serve to decrease finished part weight, modify density, and improve dimensional stability in injection-molded and cast components, supporting regulatory-driven targets for fuel efficiency and emission reduction. Our microspheres are engineered for high packing efficiency and uniform dispersion, ensuring consistent outcomes across varying resin systems and filler loadings. Engineering teams leverage their properties to lower cycle time and improve part surface finish in complex geometries, especially for interior trim and concealed structural parts.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Transport infrastructure coatings utilize glass microspheres as drop-on and intermix additives to enhance night-time reflectivity and visibility of traffic paint markings. Our controlled-diameter spheres deliver consistent retroreflection across multilane applications and climatic environments. Paint manufacturers incorporate our material to meet photometric and durability thresholds for road-use certification. Batch-to-batch uniformity allows line striping contractors and signage printers to maintain film build and workability using automated and manual dispensing processes over concrete and bituminous substrates.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Solid glass microspheres serve as an engineered density modifier in oil well cement slurries and drilling muds where precise control over hydrostatic pressure is required to mitigate formation fracture risk. These materials maintain structural performance under differential wellbore loading and thermal cycling. Compliance with field standards ensures compatibility within heterogeneous slurries, and the inert glass chemistry resists progressive chemical degradation under long-term exposure. Operators select key size grades to synchronize with pump and separator specifications, actively reducing slurry density without large increases in viscosity or settlement rate.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Construction and refrigeration board manufacturers introduce glass microspheres to improve insulation value in rigid foam sheets and panels. These spheres boost closed-cell structure, lower panel density, and raise compressive creep resistance for long-term building envelope integrity. Leading manufacturers implement rigorous incoming QC to verify particle size distribution and glass purity, ensuring batch uniformity and minimizing VOC potential compared to some organic fillers. Downstream production lines utilize gravimetric feeders and inline dispersers for batch and continuous foam extrusion. Finished board characteristics consistently achieve regulatory performance benchmarks on fire safety, moisture resistance, and thermal conductance.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Equipment and parts manufacturers use solid glass microspheres as media for controlled abrasive blasting and shot peening processes. Their spherical geometry and uniform size distribution deliver consistent surface texturing, deburring, and micro-cleaning for metal components, including turbine blades, medical implants, and aerospace structures. Used under validated pressure and exposure protocols, the microspheres support residual stress improvement with low material removal, extending fatigue life without altering base material composition. Process parameters require strict alignment to End-User QA and international maintenance standards, especially in regulated aerospace and medical industries.
Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
Serial Number | Sieve Size(Mesh) | 90%BEADS BETWEEN MICRONS | %PASSING | SURFACE AREAm2/cc | MEDIAN DIAMETER (MICRONS) |
10 | 20-30 | 864-535 | 90-100 | NA | NA |
9 | 30-40 | 535-381 | 90-100 | NA | NA |
8 | 40-60 | 381-221 | 90-100 | NA | NA |
7 | 60-80 | 221-173 | 90-100 | NA | NA |
6 | 80-100 | 173-140 | 90-100 | NA | NA |
5 | 100-120 | 140-117 | 90-100 | NA | 120-140 |
4 | 120-150 | 117-104 | 85-100 | NA | 100-120 |
3 | 150-180 | 104-84 | 85-100 | 0.09-0.40 | 80-100 |
2 | 180-250 | 84-61 | 80-100 | 0.4-0.8 | 65-80 |
1 | 250-300 | 61-46 | 80-100 | 1.05-1.75 | 50-60 |
0 | ≤300 | <46 | 85-100 | 1.75-3.30 | 10-40 |
Competitive Solid Glass Microspheres prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Flexible payment, competitive price, premium service - Inquire now!
In our years manufacturing solid glass microspheres, we’ve seen steady growth in both interest and technical demands from a range of industries. These products aren’t new on the scene, but their roles have certainly evolved. A closer examination can show how a simple-sounding raw material plays a supporting role in everything from road safety to modern plastics and specialty coatings.
No two production runs should ever look quite the same if quality is the focus. From batch to batch, we monitor ingredients, furnace temperatures, glass viscosity, and cooling rates. Inconsistent temperatures or humidity can change the sphericity and density of the microspheres, so every step involves real-time adjustments. It takes more than dumping glass preforms in a flame and hoping for the best. Our technicians go back to basics on every shift: measure viscosity, dial in grain size, and keep careful records to spot shifts in air or furnace flow that might throw off the roundness or introduce invisible flaws.
Dense, clean, and uniform spheres weigh heavily in downstream applications. One batch meant for road marking beads needs less than 1% broken spheres; aerospace applications demand even tighter tolerances. We’ve spent years tightening our process so our SGM-30, SGM-52, and SGM-80 lines meet specific bulk density and particle size ranges, and our team often works with customers to tune special runs for new product lines. Laboratories have confirmed that a predictable particle size distribution is what sets a premium microsphere apart from simply crushed or milled glass fillers. Our production metrics focus on that reality every day, not on marketing taglines.
It’s easy to get lost in the differences between similar types of glass additives. Many new customers call us with confusion: “How are your solid glass microspheres different from cheaper fillers on the market?” Hollow glass microspheres, for example, weigh much less and crush under lower pressures. They suit low-density foams, floating buoyancy aids, or applications where strength gets traded for weight savings. Crushed glass abrasives work for blasting or as fillers when high roundness isn’t needed.
Solid spheres, on the other hand, handle higher loads and survive processes like compounding and injection molding without breaking down. Their consistent diameter and sphericity create a ball-bearing effect in many polymers, improving flow and processing without sacrificing impact strength. We’ve seen how they reinforce paints, add brightness and reflectivity to coatings, and boost durability in road marking beads. Solid microspheres remain stable in hot-melt systems and don’t absorb water the way porous or hollow fillers do. That keeps them from swelling or pulling away from the matrix, critical in infrastructure and automotive uses. It’s clearer why price differences exist once you’ve seen how much a crushed filler can compromise the performance of an engineered system.
We produce a spectrum of size grades in our main models. Our SGM-30 range works between 20μm and 38μm, usually chosen for precision coatings and abrasive tools. SGM-52 spans 40μm to 63μm, often the go-to size for reflective paints and highway line marking. SGM-80 offers the widest grain, 63μm to 106μm, suited for high-build applications where flow is a concern. The key is uniformity within those bands. Our quality control labs run laser diffraction, microscope image analyses, and batch sampling to guarantee minimal fine or oversized particles show up in a shipped drum.
Each batch leaves the plant with a density between 2.4 and 2.5 g/cm³. We use soda-lime glass chemistry, as it resists most chemicals used in paints and plastics, and withstands exposure in outdoor and automotive environments. We’ve rejected cheaper glass frits and bottle cullet for their contaminants and unpredictable behavior in the furnace.
Microspheres go unseen by most end users, but the people who specify performance coatings or build sheet-molding compounds quickly notice when the quality isn’t there. For highway departments, the retroreflection of road markings helps drivers see lines at night and during rain. This only works with clean, spherical beads embedded on the surface. Broken spheres scatter light instead of reflecting it back, compromising safety. Over the years, we’ve tweaked our annealing cycle to reduce internal stress and spent long nights running test stripes with city maintenance crews to track which batches endure plow scraping or deicing brine.
In plastics, our solid glass microspheres do more than bulk out a compound. They improve scratch resistance in molded parts – something carmakers appreciate on dashboards and door handles. We’ve worked with customers who once used chalk or talc, only to find those alternatives dulled their surfaces or made painting difficult. Microspheres also lower shrinkage in epoxies and polyurethanes. Molded objects come out with more predictable dimensions, which means fewer scrap and less wasted effort downstream.
If someone asks about paint reinforcement, we bring up our experience with exterior wall paints prepared for subtropical humid climates. The glass spheres don’t absorb water or change color, so paint lasts longer in sun and rain. We ran accelerated aging tests with local builders to fine-tune loading ratios. They told us where cheap fillers failed, and we watched our beads stay put while the competition’s settled out or formed cracks.
Not every country demands the same sizing, packaging, or performance. We’ve learned from exporting to five continents that moisture control can make or break a shipment. If microspheres absorb humidity on the dock or at sea, agglomeration sets in. Our packing line includes moisture-scanning sensors and tamper-evident seals for this reason. We document everything, from drying times to delivery conditions, as even a 1% shift in moisture can mess with flow rates in automated dosing systems.
Some customers blend spheres directly into resin in-line, while others premix in bulk hoppers. Over the years, we’ve supplied reflow glass spheres for electronics solder pastes and large-diameter spheres for valve grinding compounds. In each case, it isn’t enough to just offer a high-quality product. We work out protocols for dust control, bulk transfer, and dosing. Many first-time users get caught by simple mistakes, like using too narrow a screw feeder, which cracks spheres and creates dust. We’ve visited customer plants, watched their process lines, and gone back to the drawing board with them to smooth out these real-world challenges.
Global manufacturers like us can’t ignore the growing push for products with low environmental burdens. We recycle scrap glass where possible, rerouting off-spec spheres into abrasive or filler streams. We’ve reworked our melting furnaces to use less energy, adopting recuperative burners and upgrading to low-emission filters. We track heavy metal content in every raw material batch, ensuring compliance with REACH and RoHS directives. These steps add cost, but skipping them would put long-term customers – and our reputation – at risk.
Low-dust spheres cut airborne particulates in production sites, protecting worker health. Minimizing heavy metals like lead, arsenic, and antimony keeps our product line ready for export into strict markets. Customers crafting medical or food-contact plastics ask for certificates on soluble ions and chemical leaching; we carry out third-party testing on sample lots and share those results directly.
One overlooked environmental challenge is microplastic pollution. Glass, as a mineral-based material, doesn’t persist like polymer microspheres if released into the environment. Our customers are shifting away from polymeric beads for abrasives and fillers, citing regulatory crackdowns, and solid glass offers a stable, safer choice for most applications.
We often answer questions about why glass microspheres cost more than mineral fillers or fly ash. Many buyers see only the delivered ton price. They learn the difference after a few production cycles when they weigh factors like improved part yield, lower tool abrasion, or better weather resistance. We’ve logged comparison studies showing how our high-purity spheres reduce machine downtime, prevent filter clogging, and lower scrap rates over months of production.
Some misconceptions remain stubborn. For example, we hear claims that smaller spheres always provide better performance. In reality, using too fine a mesh can raise dust levels, cause clumping, or require major changes in wetting and mixing chemistries. We’ve worked on numerous pilot runs, showing customers that matching the sphere size to the resin viscosity and process temperature yields better handling and higher final strengths.
Other questions focus on chemical compatibility. Soda-lime glass resists most acids, bases, and solvents, but not all. Some aggressive fluorinated compounds attack glass surfaces, and we advise customers to bench-test in these rare cases. We never oversell – published compatibility tables can mislead, so we maintain our own database built from years of in-house and customer feedback. In an industry where reputation matters, honesty gains more business than sweeping claims.
A constant theme in our business involves custom development. Some of our customers request surface treatments for enhanced dispersal or better adhesion in specialty polymers. We’ve trialed silane and titanate coupling systems on our regular production lines, carefully monitoring for dust-off rates and shelf-life changes. Others push for tighter tolerances on bead diameter, prompted by high-performance composites where every micron shift changes final product quality.
One area we’ve explored is colored microspheres for anti-counterfeiting inks and branding. Adding stable ceramic pigments in the glass batch can provide a non-fade signature in high-value documents and packaging. Demand also grows for ultraviolet-marked microspheres that appear only under specific detection lights, used in crime scene investigation and covert marking of assets.
Collaborations with universities and research labs have led us to experiment with doped glass chemistries for photonic devices and biosensors. Here, absolute clarity and fluorescence under narrow band lighting becomes essential, which means our operators must achieve surface cleanliness and batch purity levels far exceeding those of commodity beads. These projects often start as short-run, high-difficulty orders but spin into longer partnerships as their end-uses evolve.
We don’t approach the manufacturing of glass microspheres as a detached or hands-off process. It’s a craft learned by experience – knowing when to recalibrate a feeder, when a chemical signature hints at batch contamination, or when a change in grain color foretells a furnace issue. Training our operators means more than telling them which buttons to press. They get hands-on with microscopy, lab tests, and troubleshooting. Many of our best shift leads came up from plant floor jobs, learning by touch and by eye what works.
Every year brings new supply chain wrinkles or demands for performance documentation. In some years, energy price spikes force us to rethink melting schedules; in others, supply shortages for high-quality sand call for close supplier collaboration. Our customers want confidence, not cheap talk, so we regularly document our batch results, production interruptions, and responses to quality retreat issues. Transparency has built relationships that last through economic cycles.
Interest in additive manufacturing, lightweight composites, and functional coatings continues to push our sector. Architects want paints that self-clean; auto part suppliers hope for improved vibration dampening and lighter parts; infrastructure specifiers demand longer service life between maintenance cycles. We respond by tweaking our formulae, updating our equipment, and, sometimes, changing our entire approach to batch logistics to deliver what’s needed.
Experienced manufacturers keep an ear open to feedback from the field. When a batch underperforms, we work through the technical data with the customer, sending lab teams on site to check handling or migration issues. Many failures trace back to small shifts in storage conditions, hopper feed rates, or unexpected local temperatures. We believe that investing in after-sales technical support pays off in fewer returns and boosts innovation on both sides of the partnership.
Glass microspheres have gone from commodity filler to a critical lever in modern industrial design. We’ve watched as requirements for purity, size tolerance, and batch repeatability grew. Meeting these standards takes real expertise, not just standard machinery.
Our role as manufacturers isn’t limited to putting product on a truck and wishing it well. Every decision – from which sand to buy, to how tightly to set cut points on sieves, to how we talk with customers – shapes the outcome. Years of experience have taught us what questions to ask, what tests to run, and when to invest in new process control hardware.
Quality doesn’t come from slogans, but from decisions made shift by shift. By focusing on clear, honest feedback and never cutting corners for cost savings alone, we keep raising the standard for glass microspheres. In the end, what sets us apart isn’t just the glass but the care, know-how, and time we put into every batch we ship.
