Thermal Insulation Hollow Glass Bubbles HN32HS Architectural Coating Filler Low Conductivity 0.108 W/mK

HAINUO HN32HS Hollow Glass Bubbles are engineered microspheres specifically developed as high-performance functional fillers for architectural coating systems. Composed primarily of SiO2, Na2O, CaO, MgO, and Al2O3, these advanced hollow glass microspheres deliver exceptional thermal insulation properties that make them ideal for energy-efficient building envelope applications. With an ultra-low thermal conductivity of just 0.108 W/m·K and a true density ranging from 0.44 to 0.48 g/cm³, HN32HS Hollow Glass Bubbles provide architects, coating formulators, and construction material manufacturers with a proven solution to significantly reduce heat transfer through wall and roof coatings. In cold climate regions such as Russia and Northern Europe, where heating costs represent a substantial portion of building operational expenses, incorporating HN32HS Hollow Glass Bubbles into architectural coatings creates an effective thermal barrier that helps maintain indoor temperatures while reducing energy consumption by up to 30 percent. The unique hollow structure of each microsphere traps air within a thin glass shell, creating millions of microscopic insulating voids throughout the coating matrix that dramatically impede conductive and convective heat flow. This mechanism transforms ordinary architectural paints and coatings into high-performance thermal insulation systems without adding excessive weight or compromising the mechanical integrity of the applied finish.

Beyond their outstanding thermal insulation capabilities, HN32HS Hollow Glass Bubbles serve as lightweight functional fillers that reduce the overall density of coating formulations by 20 to 40 percent compared to conventional mineral fillers such as calcium carbonate or talc. This weight reduction translates directly into practical benefits for contractors and applicators, including easier mixing, smoother application, reduced sagging on vertical surfaces, and lower transportation costs for premixed coating products. The spherical morphology of Hollow Glass Bubbles improves the rheological properties of coating systems, enhancing flow and leveling characteristics while minimizing the need for additional rheology modifiers. With a compressive strength rating of up to 100 MPa, HN32HS microspheres maintain their structural integrity during high-shear mixing, pumping, and spray application processes commonly used in the construction industry. This robustness ensures that the thermal insulation performance designed into the formulation is preserved throughout the entire application workflow, from factory mixing to on-site installation on building facades, interior walls, and roofing systems.

HAINUO HN32HS Hollow Glass Bubbles exhibit exceptionally low thermal expansion characteristics, ensuring dimensional stability across the wide temperature fluctuations experienced by building envelopes in continental climates. Products that incorporate these microspheres maintain their shape and structural integrity far better than those made with conventional mineral fillers, leading to increased coating durability and extended service life. The chemical inertness and high chemical resistance of the borosilicate glass composition make HN32HS Hollow Glass Bubbles compatible with a broad range of coating binders including acrylic, styrene-acrylic, polyurethane, epoxy, and silicone-based systems. This versatility allows formulators to develop tailored thermal insulation coating solutions for diverse architectural applications ranging from interior decorative finishes to high-performance exterior insulation finishing systems (EIFS). The low moisture content of less than 0.5 percent further enhances compatibility with moisture-sensitive binder systems and prevents hydrolysis-related degradation during long-term service in humid environments.

• Superior Thermal Insulation: Ultra-low thermal conductivity of 0.108 W/m·K creates an effective thermal barrier that reduces heat transfer through architectural coatings, contributing to significant energy savings in both heating and cooling seasons.
• Lightweight Filler Technology: With a true density of 0.44 to 0.48 g/cm³ and bulk density of 0.15 to 0.30 g/cm³, HN32HS Hollow Glass Bubbles reduce coating weight by 20 to 40 percent compared to conventional fillers while maintaining excellent coverage and hiding power.
• High Compressive Strength: Rated at up to 100 MPa, these microspheres withstand the mechanical stresses of high-shear mixing, pumping, and spray application without rupture, preserving consistent thermal performance throughout the applied coating.
• Low Thermal Expansion: Exceptional dimensional stability under temperature cycling prevents coating cracking, delamination, and surface defects caused by differential thermal expansion between the coating and substrate materials.
• Excellent Chemical Resistance: The borosilicate glass composition provides outstanding resistance to acids, alkalis, and organic solvents commonly encountered in construction environments, ensuring long-term coating integrity and performance retention.
• Moisture Resistance: With moisture content below 0.5 percent, HN32HS Hollow Glass Bubbles prevent water-related degradation issues including blistering, efflorescence, and freeze-thaw damage in exterior coating applications.
• Improved Application Properties: The spherical particle morphology enhances coating rheology, providing smoother flow, better leveling, reduced roller drag, and easier spray atomization for faster and more uniform application on both horizontal and vertical surfaces.

HAINUO HN32HS Hollow Glass Bubbles are specifically formulated for architectural coating systems where thermal insulation performance and lightweight properties are critical requirements. In exterior wall coatings, these microspheres create a continuous thermal break that significantly reduces heat loss through building envelopes, making them particularly valuable for energy-efficient construction in cold climate regions such as Russia, Scandinavia, and Northern China. For interior wall paints and decorative finishes, HN32HS Hollow Glass Bubbles provide an additional layer of thermal comfort while improving coverage and reducing material consumption per square meter. They are equally effective in roof coatings and waterproofing membranes, where the combination of thermal insulation, low density, and moisture resistance delivers measurable improvements in building energy performance ratings. The microspheres integrate seamlessly into texture coatings, elastomeric wall coatings, and thermal insulating renders, offering formulators the flexibility to develop differentiated products for the growing green building and energy retrofit markets. Additionally, HN32HS Hollow Glass Bubbles find application in fire-resistant coatings, where their inorganic composition and thermal stability contribute to enhanced passive fire protection in commercial and residential structures.

HAINUO HN32HS Hollow Glass Bubbles are packaged in moisture-resistant multilayer paper bags with inner polyethylene liners at a standard net weight of 10 kg per bag, or in 500 kg bulk supersacks for high-volume industrial users. Custom packaging configurations are available upon request to meet specific customer logistics and handling requirements. Every production batch undergoes rigorous quality control testing including particle size distribution analysis via laser diffraction, true density measurement by helium pycnometry, compressive strength evaluation through isostatic pressure testing, and thermal conductivity verification using guarded hot plate methodology. A Certificate of Analysis (COA) is provided with each shipment, documenting key specifications and lot traceability. HAINUO maintains ISO 9001 certified quality management systems across all manufacturing facilities, ensuring consistent product quality and reliable supply for long-term coating formulation projects. Technical support specialists are available to provide formulation guidance, compatibility testing, and application optimization recommendations to help customers achieve the best possible performance from HN32HS Hollow Glass Bubbles in their architectural coating systems.