Ultra-Low Density HN15 Hollow Glass Bubbles 0.08-0.15 g/cm³ Thermal Insulation Filler for Energy Efficient Coatings

HAINUO HN15 Hollow Glass Bubbles represent the lightest grade in our comprehensive microsphere portfolio, delivering an ultra-low bulk density range of 0.08 to 0.15 g/cm³ while maintaining sufficient mechanical integrity for a broad range of thermal insulation and weight-reduction applications. These borosilicate glass microspheres are manufactured using a proprietary high-temperature expansion process that creates exceptionally thin-walled hollow structures with wall thickness as low as 0.5 microns. The resulting product achieves a true density of merely 0.15 to 0.22 g/cm³, making HN15 one of the most effective lightweight fillers available for manufacturers seeking maximum density reduction. Despite their ultra-light construction, HN15 bubbles deliver reliable compressive strength of 10 MPa (1500 psi), ensuring they survive standard mixing, pumping, and application processes without rupture. This unique combination of extreme lightness and adequate robustness makes HN15 an indispensable material for energy-efficient building coatings, aerospace thermal barrier systems, and high-performance buoyancy applications where every gram of weight reduction translates directly into improved energy performance and operational efficiency.

• Ultra-Low Bulk Density: At only 0.08-0.15 g/cm³, HN15 achieves the lowest density in the Hainuo glass bubble product line, enabling maximum weight reduction in filled systems without exceeding practical volume loading limits.
• Superior Thermal Insulation: With thermal conductivity as low as 0.05 W/m·K and a hollow structure that traps insulating air, HN15 dramatically reduces heat transfer through coating films and composite layers, improving building energy efficiency ratings.
• High Porosity Advantage: The thin-walled hollow structure provides a high void fraction that scatters thermal radiation and disrupts conductive heat pathways, delivering insulation performance superior to solid fillers at equivalent loading levels.
• Low Thermal Expansion: Minimal dimensional change across wide temperature ranges ensures coating integrity and crack resistance during thermal cycling, a critical requirement for exterior building envelope applications exposed to seasonal temperature extremes.
• Chemical Inertness: Borosilicate glass composition is inherently resistant to degradation from alkaline cementitious environments, acidic atmospheric pollutants, and common coating solvents, ensuring decades of stable performance in architectural applications.
• Low Refractive Index: With a refractive index of approximately 1.1, HN15 enhances the opacity and hiding power of white and light-colored thermal insulation coatings while reducing the required pigment loading for equivalent coverage.

HN15 Hollow Glass Bubbles excel in applications where maximum weight reduction and thermal insulation are the primary performance drivers. In architectural and construction coatings, HN15 serves as a functional filler in exterior thermal insulation paint systems, reflective roof coatings, and energy-saving wall renderings where the bubbles reduce thermal transmittance through building envelopes while contributing negligible additional weight. The product is equally effective in aerospace thermal protection systems, where its ultra-low density and thermal barrier properties protect sensitive components from extreme temperature gradients during atmospheric reentry and high-speed flight conditions. Marine buoyancy applications such as syntactic foams for deep-sea submersibles and offshore platform flotation modules benefit from HN15's combination of low density, high hydrostatic pressure resistance relative to its weight, and long-term water resistance. Additional applications include lightweight spackling compounds, low-density adhesives for composite panel manufacturing, and thermal insulating grouts for geothermal and district heating pipeline systems where installation weight constraints demand the lightest possible filler solution.

HAINUO HN15 Hollow Glass Bubbles are supplied in moisture-resistant cartons and durable ton bags with protective inner liners to prevent humidity absorption during storage and transit. Custom packaging configurations are available to accommodate specific handling equipment and production line integration requirements. Every production batch undergoes comprehensive quality verification including laser diffraction particle sizing, helium pycnometry true density measurement, isostatic crush strength testing, and Karl Fischer moisture analysis. Our ISO 9001 certified manufacturing facility maintains full batch traceability and provides certificates of analysis with each shipment. Standard delivery lead time is 7-15 working days with a monthly production capacity of 5000 kg. Comprehensive technical support including formulation guidance, compatibility testing, and application optimization is available to assist customers in achieving maximum performance from HN15 in their specific end-use applications.