Name: Low Density High Strength Ultra-Fine Hollow Glass Microspheres and Glass Microbubbles for Adhesives Sealants Coatings Composites Rubber Plastics
Brand: Shanxi Hainuo Technology Co.Ltd.
SKU: HN32HS Hollow Glass Microspheres
Price: Negotiable USD
Availability: InStock

Home > products > Glass Microbubbles >

Low Density High Strength Ultra-Fine Hollow Glass Microspheres and Glass Microbubbles for Adhesives Sealants Coatings Composites Rubber Plastics

Low Density Hollow Glass Microspheres

High Strength Glass Microbubbles

Ultra-Fine Hollow Glass Spheres

Place of Origin:

China

Brand Name:

Hainuo

Model Number:

HN32HS Hollow Glass Microspheres

Request A Quote

Low Density High Strength Ultra-Fine Hollow Glass Microspheres and Glass Microbubbles for Adhesives Sealants Coatings Composites Rubber Plastics

Product Details

Payment & Shipping Terms

Minimum Order Quantity

25 kg (1 bag)

Packaging Details

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

Supply Ability

In production

Hainuo HN15T Hollow Glass Microspheres

Get Best Price

10 to 100 Microns Glass Microbubbles with Dielectric Constant 1.2 to 2.2 Synthesized From Silica Precursors

Get Best Price

Glass Microbubbles with Low Moisture Absorption and Lightweight Fillers for Thermal Conductivity 0.2 W/m·K

Get Best Price

Low Moisture Absorption Glass Microbubbles with 10-100 Micron Diameter Range and 0.2 Thermal Conductivity

Get Best Price

+86 13640331534

JaneZhou@sxhainuo.com

86-180-1912-5865

Contact Now

Product Description

Ultra-fine high-strength low-density grade

This grade belongs to the Hainuo Low-Density series (true density 0.30–0.50 g/cm³). Produced from soda-lime borosilicate glass, it consists of micron-scale hollow spheres offering light weight with high strength, thermal insulation, chemical resistance and a low dielectric constant — a key functional filler in the advanced composites value chain.

0.30–0.34Density g/cm³

28Strength MPa

4,000Strength psi

≤20D50 µm

NO1 Highlights

Product highlights

Best balance of density, strength and particle size — the widest application coverage
Markedly reduces system density and consumption of resin and other raw materials
Spherical shape distributes stress; improves impact resistance and reduces cracking and shrinkage
Low thermal conductivity and low dielectric constant, serving both insulation and electrical needs
Free-flowing and easy to disperse on conventional plastics and coatings equipment
Stable domestic supply; a drop-in alternative to comparable imported grades

Product description

The low-density series covers automotive SMC/BMC, electronic potting, 5G low-dielectric materials, oil-well cementing and drilling, and industrial insulating and anti-corrosion coatings. Within a density tier, HS = high strength, HL = economy light weighting, and -1/-2 = sub-grades.

HN32HS in one sentence: Hainuo HN32HS: true density 0.30–0.34 g/cm³, compressive strength 28 MPa(4,000 psi), D50 ≤20 µm — Ultra-fine high-strength low-density grade.

NO2 Technical data

Physical & mechanical properties

Property	Typical value / spec	Notes
True density	0.30–0.34 g/cm³	Density of the solid shell material, excluding inter-particle voids
Bulk density	0.15–0.18 g/cm³	Density in loose-packed state; used for packaging and dosing calculations
Compressive strength	28 MPa	Crush rate ≤35% at 28 MPa static pressure
Compressive strength (imperial)	4,000 psi	Industry-standard unit, widely used in cementing and buoyancy material selection
Crush rate	≤ 35 %	Upper limit of fractured fraction at the nominal pressure
Survival rate	≥ 65 %	100% − crush rate; indicates microsphere integrity
Float rate	≥ 95 %	Fraction that floats in water; indicates the proportion of sealed spheres

Compressive strength is a nominal value: the crush rate at the stated static pressure does not exceed the value in the table above.

Particle size distribution

Property	Typical value / spec	Notes
D10	≤ 10 µm	Particle size at 10% of the cumulative distribution
D50 (median)	≤ 20 µm	Particle size at 50% of the cumulative distribution; affects packing and surface finish
D90	≤ 40 µm	Particle size at 90% of the cumulative distribution
Shape	Thin-walled hollow sphere	Thin-walled, sealed, high sphericity

Particle sizes are upper limits (≤); measured reports are supplied with each batch COA.

Material & appearance

Property	Typical value / spec	Notes
Composition	Soda-lime borosilicate glass	Soda-lime borosilicate glass
Appearance	White, free-flowing hollow spherical powder	Visual inspection
Colour	White	Individual spheres are transparent hollow spheres; bulk form is a white powder
pH value	8.0–9.0	Aqueous dispersion
Moisture	≤ 0.3 %	Factory release control item
Dielectric properties	Measured data on request	For low-dielectric applications (5G / high frequency) please request data for your frequency band

Packaging & supply

Property	Typical value / spec	Notes
Material code	HGM-32HS	Reference for orders and contracts
Standard package	25 kg / bag (paper-plastic composite bag)	Paper-plastic composite bag with moisture barrier liner
Optional packaging	25 kg paper-plastic composite bag (standard) / 10 kg small pack / 500 kg tonne bag / Custom packaging	Small trial packs and bulk tonne bags both available
Availability	In production	Standard grades kept in stock
Minimum order	25 kg (1 bag)	Contact sales for samples and trial packs

NO3 Applications

Typical applications

Adhesives & Sealants4

Weld-seam adhesive0.20–0.35 g/cm³

Lowers adhesive density, compensates cure shrinkage, seals and damps vibration

Body seam sealing and spot-weld adhesives　|　Automotive OEM
Primer adhesive0.20–0.35 g/cm³

Lowers density, resists sagging, improves application and sanding

Automotive and construction primers　|　Automotive / Construction
Sealant0.20–0.40 g/cm³

Lowers density, insulates against heat and sound, compensates shrinkage

PU, silicone and polysulphide sealants　|　Construction / Automotive
Potting compound0.20–0.40 g/cm³

Lowers density and dielectric constant, buffers stress, protects components

Potting of electronic components and power supplies, EMC encapsulation　|　Electrical & electronics

Coatings4

Insulating coating0.20–0.40 g/cm³

Sealed hollow spheres create low-conductivity insulating cells

Exterior walls and roofs, equipment insulation　|　Advanced building materials
Reflective heat-blocking coating0.20–0.40 g/cm³

High solar reflectance, low conductivity, lower surface temperature

Tanks, pipes, roofs and grain silos　|　Advanced building materials
Heavy-duty anti-corrosion coating0.30–0.45 g/cm³

Lowers density, resists sagging in thick films, adds insulation

Marine, offshore and steel structures　|　Industrial anti-corrosion
Repair putty0.20–0.40 g/cm³

Lowers density, easy sanding, resists shrinkage cracking

Automotive, panel-beating and FRP repair　|　Automotive aftermarket

Composites3

Syntactic buoyancy material0.15–0.30 g/cm³

Lowers density and increases buoyancy

Deep-sea buoyancy blocks and syntactic foam　|　Offshore engineering / Deep-sea equipment
Engineered stone / sanitaryware0.20–0.40 g/cm³

Lowers density, improves thermal insulation

Engineered stone and sanitaryware　|　Home & building materials
FRP (glass-reinforced plastic)0.30–0.50 g/cm³

Lowers density, light and strong, insulating

Hand lay-up, vacuum infusion and pultruded FRP　|　Composites

Rubber & Elastomers2

Footwear sole0.30–0.50 g/cm³

Lowers density, reduces weight, improves rebound cushioning

EVA / PU / rubber foam light weighting　|　Sports & leisure
TPE pillow / memory foam0.30–0.40 g/cm³

Lowers density, reduces weight, slow rebound

Weight reduction and rebound tuning　|　Household

Plastics1

3D printing material0.20–0.50 g/cm³

Lowers density, light weighting

Lightweight filaments and powders　|　Additive manufacturing

Other1

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.

Other typical uses within this series

Automotive SMC / BMC / RIM composites
PP / PA / PBT injection-moulded parts
Low-dielectric 5G fillers (base stations, radomes, mmWave)
Electronic potting compounds and copper-clad laminates
Oil-well cementing and drilling fluids
Industrial insulating and anti-corrosion coatings
Appliance insulating plastics
Rubber seals and footwear

NO4 Processing & logistics

Processing guidance

Use low-shear, low-speed dispersion; keep disperser tip speed at or below 8 m/s
Add late: add the microspheres last, at low speed
Keep processing temperature below 120 °C; the glass softening point is approx. 620 °C
Use the full bag once opened, or reseal and store in a dry place

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.

NO5 FAQs

Frequently asked questions

What do the HS / HL / -1 / -2 suffixes mean?

HS = high-strength variant within the same density tier; HL = economy lightweight variant (wider crush-rate tolerance, better cost); -1/-2 = sub-grades of the same family, differing mainly in crush rate and particle size distribution.

How do I determine the loading?

It depends on the target density and performance required. Typical levels are 5%–20% for coatings and adhesives, 10%–30% for composites and 10%–40% for cement dry blends. Always validate with a lab trial first.

How is "compressive strength" defined?

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.

What is the relationship between crush rate and survival rate?

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.

What does float rate mean?

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.

What are the minimum order quantity and lead time?

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.

Can you customise a grade to a specific density or strength?

Yes. Send us your target true density, compressive strength and particle size distribution; our technical team will assess feasibility and arrange trial validation.

Tags：

Low Density High Strength Ultra-Fine Hollow Glass Microspheres and Glass Microbubbles for Adhesives Sealants Coatings Composites Rubber Plastics

Low Density Hollow Glass Microspheres

High Strength Glass Microbubbles

Ultra-Fine Hollow Glass Spheres

Hainuo HN15T Hollow Glass Microspheres

10 to 100 Microns Glass Microbubbles with Dielectric Constant 1.2 to 2.2 Synthesized From Silica Precursors

Glass Microbubbles with Low Moisture Absorption and Lightweight Fillers for Thermal Conductivity 0.2 W/m·K

Low Moisture Absorption Glass Microbubbles with 10-100 Micron Diameter Range and 0.2 Thermal Conductivity

Adhesives & Sealants4

Coatings4

Composites3

Rubber & Elastomers2

Plastics1

Other1

glass micro spheres

micro glass bubbles

glass microballoons