25 kg / bag (paper-plastic composite bag)；Optional packaging：25 kg paper-plastic composite bag (standard) / 10 kg small pack / 500 kg tonne bag / Custom packaging
Ultra-Light True density ≤ 0.30 g/cm³In productionCompositesOther
Hainuo HN15HS Hollow Glass Microspheres
High-strength ultra-light flagship — the workhorse buoyancy grade
HN15HS is Hainuo's ultra-light high-strength grade for deep-sea equipment and subsea oil and gas. True density is 0.13–0.17 g/cm³, compressive strength 4.14 MPa (600 psi) and D50 ≤ 40 μm. The spheres are made from water-resistant, chemically stable soda-lime borosilicate glass with a sealed inert-gas-filled cavity, delivering extreme weight reduction together with a reliable survival rate under pressure.
0.13–0.17Density g/cm³
4.14Strength MPa
600Strength psi
≤40D50 μm
Ultra-Light · True density ≤ 0.30 g/cm³
The first choice for maximum light weighting and thermal insulation: the lowest density and lowest thermal conductivity across the range, for buoyancy materials, reflective insulating coatings and lightweight construction — any application where every gram counts.
Selection tip: Confirm the service pressure first: the ultra-light series generally ranges from 2 to 14 MPa and suits atmospheric to medium-low pressure systems. Where higher strength is required, choose an HS-suffixed grade within the same density tier.
Highlights
Product highlights
True density as low as 0.15 g/cm³ — the flagship grade combining ultra-low weight with high strength
Compressive strength 4.14 MPa (600 psi) with crush rate controlled to ≤45%, for stable long-term buoyancy
Maintains stable buoyancy of solid buoyancy materials under complex conditions and varying operating environments
Reduces structural volume for the same buoyancy, saving deck and loading space and cutting transport losses
Significantly lowers equipment dead weight, supporting low-carbon, high-efficiency operations
HN15HS is Hainuo's ultra-light high-strength grade for deep-sea equipment and subsea oil and gas. True density is 0.13–0.17 g/cm³, compressive strength 4.14 MPa (600 psi) and D50 ≤ 40 μm. The spheres are made from water-resistant, chemically stable soda-lime borosilicate glass with a sealed inert-gas-filled cavity, delivering extreme weight reduction together with a reliable survival rate under pressure.
In solid buoyancy systems, HN15HS compresses structural volume and increases payload while maintaining net buoyancy. In subsea pipe insulation and deep-water oil and gas it reduces buoyant-body weight and increases payload. It has been validated in volume production for submersibles, underwater robots, buoys and subsea pipe insulation layers.
HN15HS in one sentence: Hainuo HN15HS: true density 0.13–0.17 g/cm³, compressive strength 4.14 MPa(600 psi), D50 ≤40 μm — High-strength ultra-light flagship — the workhorse buoyancy grade.
Technical data
Physical & mechanical properties
Property
Typical value / spec
Notes
True density
0.13–0.17 g/cm³
Density of the solid shell material, excluding inter-particle voids
Bulk density
0.065–0.095 g/cm³
Density in loose-packed state; used for packaging and dosing calculations
Compressive strength
4.14 MPa
Crush rate ≤45% at 4.14 MPa static pressure
Compressive strength (imperial)
600 psi
Industry-standard unit, widely used in cementing and buoyancy material selection
Crush rate
≤ 45 %
Upper limit of fractured fraction at the nominal pressure
Sensitises the matrix, provides hot spots, lowers density
Sensitising and density reduction | Mining
Filter media / insulation core0.15–0.40 g/cm³
Creates porosity for filtration and thermal insulation
Pore formation, filtration, insulation | Environmental / Building materials
The application breakdown follows the Hainuo Industry Segmentation (10 Nov 2026). Grades are matched to each application by true-density window; applications marked "high strength" additionally require the strength threshold to be met.
Use low-shear, low-speed dispersion; avoid prolonged high-speed operation of the disperser disc
Add late: complete dispersion of other components in the resin/base first, then add microspheres at low speed
Keep processing temperature below 120 °C and avoid conditions approaching the glass softening point (approx. 620 °C)
For extrusion and injection moulding, prefer screws with a low compression ratio and wider clearances to reduce shear breakage
Packaging
Standard package
25 kg / bag (paper-plastic composite bag)
Optional packaging
25 kg paper-plastic composite bag (standard),10 kg small pack,500 kg tonne bag,Custom packaging
Package marking
Grade / batch no. / net weight / production date / shelf life
Storage & transport
Storage
Store in a dry, cool, well-ventilated place; protect from moisture and heavy stacking. Reseal opened bags and use as soon as possible.
Shelf life
24 months in original, unopened packaging under dry storage
Transport
Ship as general cargo; protect from rain, heavy stacking and package damage. Handle with care.
Safety & handling
Non-toxic, odourless and non-flammable. Wear a dust mask and safety glasses during handling and avoid raising dust.
FAQs
Frequently asked questions
HN15HS is the high-strength variant at 4.14 MPa (600 psi), twice the strength of HN15-1/-2 (2.06 MPa), and suits deep-sea equipment where buoyancy stability and pressure resistance matter. HN15-1/-2 are more economical and suit atmospheric insulation and light weighting.
The specification states 45%, i.e. no more than 45% fracture at 4.14 MPa static pressure. The value observed in service also depends on processing shear, matrix viscosity and temperature, so please verify with a lab trial.
Standard packaging is a 25 kg paper-plastic composite bag. 10 kg small packs, 500 kg tonne bags and customised packaging are also available.
It is the pressure at which the crush rate does not exceed the stated value (for example ≤30%). HN46 is rated 42 MPa (6,000 psi) with a crush rate ≤30%, meaning no more than 30% of the spheres fracture at 42 MPa static pressure.
Survival rate = 100% − crush rate. The published crush rate is an upper limit; the value actually observed after processing is also affected by shear, temperature and the matrix.
Float rate is the proportion of spheres that float in water. It reflects sphere integrity and sealing: a higher float rate means fewer broken or open spheres, and therefore more stable buoyancy and insulation.
Standard grades are kept in stock with a minimum order of 25 kg (1 bag). Please contact sales for bulk lead times and custom grade development.
Yes. Send us your target true density, compressive strength and particle size distribution; our technical team will assess feasibility and arrange trial validation.
Contact us
Sales hotline
153 1785 8060
Company tel.
+86 356-3233299
Email
xinshu.li909@sxhainuo.com
Website
www.sxhainuo.com
Plant
Macun Industrial Park, Gaoping Economic Development Zone, Shanxi, China
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