The Complete Guide to Hainuo Hollow Glass Microspheres: Choose the Right Grade by Density & Strength
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shanxi Hainuo Technology Co., Ltd. — China’s first homegrown high-performance hollow glass microsphere (HGM) manufacturer, with 15,000 tonnes of annual capacity.
Why This Guide?
From deep-sea oil & gas to 5G base stations, from aerospace structures to lightweight automotive composites — hollow glass microspheres (HGM) deliver light weighting, higher strength, thermal insulation and low dielectric performance across a wide range of demanding applications.
Hainuo offers 31 commercial grades spanning ultra-light, low-, medium- and high-density ranges. Selecting the correct grade is the difference between an optimized part and a formulation that underperforms. This guide, based on the latest Hainuo product specification sheet (Sep 2026), helps you match the right model to your pressure, weight and particle-size requirements at a glance.
How to Read the Model Numbers
All Hainuo grades are prefixed HN. The number broadly corresponds to the true-density tier (value * 0.01 g/cm³): for example, HN60 has a true density of 0.58–0.62 g/cm³, while HN140 reaches 1.30–1.50 g/cm³. Within each family, suffixes tell you the design intent:
Suffix
Meaning
HS
High-Strength series — higher compressive strength within the same density tier
HL
Lightweight / Economy series
-1 / -2
Sub-grades of the same family
K
High-strength custom grade (e.g. IN16K, 0.44–0.48 g/cm³, 110 MPa / 16,000 psi)
The Four Series at a Glance
1. Ultra-Light Series — True density ≤ 0.30 g/cm³
The ultimate choice for maximum light weighting and thermal insulation.
Model
True Density (g/cm³)
Strength (MPa / psi)
Crush ≤ %
Float ≥ %
Bulk Density (g/cm³)
D10/D50/D90 (μm)
HN15T
0.11–0.13
1.72 / 250
15
98
0.060–0.080
≤30 / ≤90 / ≤120
HN15-1
0.13–0.17
2.06 / 300
25
98
0.065–0.095
≤30 / ≤90 / ≤150
HN15-2
0.13–0.15
2.06 / 300
25
98
0.065–0.095
≤30 / ≤90 / ≤150
HN15HS
0.13–0.17
4.14 / 600
45
98
0.065–0.095
— / ≤40 / —
HN20
0.18–0.22
3.44 / 500
30
98
0.10–0.12
≤25 / ≤70 / ≤105
HN20HS
0.18–0.22
3.44 / 500
10
98
0.10–0.12
≤25 / ≤70 / ≤105
HN22HS
0.21–0.24
8.27 / 1,200
—
95
0.11–0.13
≤20 / ≤40 / ≤70
HN25
0.23–0.27
3.44 / 500
30
95
0.13–0.16
≤25 / ≤70 / ≤105
HN28HS
0.26–0.30
13.79 / 2,000
30
98
0.14–0.17
≤15 / ≤40 / ≤75
HN30
0.28–0.32
10 / 1,450
25
95
0.15–0.18
≤20 / ≤45 / ≤80
Typical uses: solid buoyancy materials (submersibles, ROV/AUV, USVs), reflective insulating coatings, lightweight concrete and boards, insulating mortars and putties, NVH damping and structural foams, 3D-printing light weighting, and civil blasting.
2. Low-Density Series — True density 0.30–0.50 g/cm³
The best-balanced workhorses, covering the widest range of applications.
Model
True Density (g/cm³)
Strength (MPa / psi)
Crush ≤ %
Float ≥ %
Bulk Density (g/cm³)
D10/D50/D90 (μm)
HN32
0.30–0.34
13.79 / 2,000
20
98
0.15–0.18
≤20 / ≤45 / ≤80
HN32HS
0.30–0.34
28 / 4,000
35
95
0.15–0.18
≤10 / ≤20 / ≤40
HN38
0.36–0.40
28 / 4,000
20
98
0.18–0.20
≤20 / ≤40 / ≤65
HN38HS
0.36–0.40
42 / 6,000
20
98
0.18–0.20
≤20 / ≤40 / ≤65
HN38HL
0.36–0.40
28 / 4,000
45
98
0.18–0.20
≤20 / ≤40 / ≤65
HN40-1
0.38–0.42
28 / 4,000
25
95
0.20–0.23
≤20 / ≤40 / ≤75
HN40-2
0.38–0.42
28 / 4,000
30
95
0.20–0.23
≤20 / ≤40 / ≤75
HN40HS
0.38–0.42
42 / 6,000
30
98
0.20–0.23
≤20 / ≤40 / ≤75
HN42HL
0.40–0.44
20 / 2,900
25
95
0.20–0.23
≤20 / ≤40 / ≤75
HN46
0.44–0.48
42 / 6,000
30
95
0.23–0.26
≤20 / ≤40 / ≤75
HN46HS
0.44–0.48
69 / 10,000
30
98
0.23–0.26
≤20 / ≤40 / ≤75
HN46HL
0.44–0.48
20 / 2,900
25
95
0.23–0.26
≤20 / ≤40 / ≤75
IN16K
0.44–0.48
110 / 16,000
35
98
0.23–0.26
≤10 / ≤25 / ≤40
HN50
0.48–0.52
55 / 8,000
20
95
0.25–0.27
≤15 / ≤35 / ≤60
Typical uses: automotive SMC/BMC/RIM composites and PP/PA/PBT injection parts, low-dielectric fillers for 5G (base stations, radomes, mmWave), electronic potting and CCL, oil-well cementing and drilling, industrial insulation and anti-corrosion coatings, appliance insulation plastics, rubber seals and footwear.
3. Medium-Density Series — True density 0.50–0.70 g/cm³
The high-strength ceiling for demanding pressure environments.
Model
True Density (g/cm³)
Strength (MPa / psi)
Crush ≤ %
Float ≥ %
Bulk Density (g/cm³)
D10/D50/D90 (μm)
HN60
0.58–0.62
55 / 8,000
18
95
0.30–0.34
≤15 / ≤35 / ≤70
HN60HS-1
0.58–0.62
83 / 12,000
25
95
0.30–0.34
≤15 / ≤35 / ≤70
HN60HS-2
0.58–0.62
110 / 16,000
25
95
0.30–0.34
≤15 / ≤35 / ≤70
HN60HS-3
0.58–0.62
124 / 18,000
25
95
0.30–0.34
≤15 / ≤35 / ≤70
HN60HL
0.58–0.62
—
—
85
—
—
Typical uses: high-strength oil-well cementing (12,000–18,000 psi class), lightweight drilling fluids, 5G copper-clad laminates, aircraft composite structures and sandwich cores, radomes, automotive thermoplastics, engineered stone. Highlight: HN60HS-3 reaches 124 MPa / 18,000 psi at just 0.58–0.62 g/cm³.
4. High-Density Series — True density ≥ 0.90 g/cm³
The pressure-rated choice for deep, high-pressure wells.
Model
True Density (g/cm³)
Strength (MPa / psi)
Crush ≤ %
Float ≥ %
Bulk Density (g/cm³)
D10/D50/D90 (μm)
HN100
0.90–1.10
55 / 8,000
35
—
—
≤15 / ≤35 / ≤60
HN140
1.30–1.50
90 / 13,050
45
—
—
≥35 / — / —
Typical uses: lightweight drilling-fluid / mud additives (pressure-depleted zones, weak formations, lost-circulation drilling) and well-cementing slurry additives.
Applications by Industry
Industry
Key Applications
Representative Grades
Oil & Gas / Energy
Drilling, cementing, offshore
HN60, HN100, HN140, HN46, HN40-2, HN40HS, HN20, HN20HS, HN15HS
Automotive & Transportation
SMC/BMC/RIM, thermoplastics, NVH
IN16K, HN60HS-2/3, HN60, HN38, HN38HS, HN32, HN32HS, HN40HS, HN28HS, HN25, HN22HS, HN20
Electronics & 5G
High-frequency materials, potting
IN16K, HN60HS-2, HN60, HN32, HN22HS
Aerospace & Defense
Lightweight composites, radomes
HN60HS-2/3, HN60, IN16K, HN38HS, HN38, HN22HS, HN15T
Industrial Coatings
Insulation, anti-corrosion
HN50, HN46, HN46HS, HN38, HN38HS, HN38HL, HN40HS, HN30, HN15-1, HN15-2, HN42HL
Marine Engineering
Buoyancy, hull composites
HN20, HN20HS, HN22HS, HN15HS, HN38, HN32, HN32HS
Construction
Insulation, lightweight boards, concrete
HN15T, HN15-1, HN15-2, HN20, HN25, HN38HL, HN40HS, HN60HL
Adhesives & Sealants
Structural and industrial adhesives
HN38, HN38HS, HN38HL, HN30, HN25, HN20
Rubber & Footwear
Foamed midsoles, seals, rollers
HN50, HN46, HN46HS, HN38
Consumer & General Industrial
Appliances, FRP, sports, 3D printing
HN50, HN46, HN46HL, HN40-1, HN25, HN22HS, HN20, HN15T
Other Specialty
Civil blasting, engineered stone
HN20, HN20HS, HN25, HN15T, HN60HL, HN38, HN40HS
Three Steps to the Right Grade
1. Define the pressure envelope first. Select a strength range based on your process or service pressure — for example, 8,000–18,000 psi for well cementing, or a lower envelope for coatings and adhesives.
2. Set the light-weighting target. Within the pressure range, the lower the density, the less dosage you need and the greater the weight saving.
3. Verify particle size and crush rate. D50/D90 affect packing and surface finish; crush rate affects long-term system stability. Confirm these item by item for specialty applications.
Why Hainuo?
Shanxi Hainuo Technology Co., Ltd. is China’s first company to achieve independent R&D and industrialized mass production of high-performance hollow glass microspheres, with an annual capacity of 15,000 tonnes. Its core invention patent has won the China Patent Excellence Award, and its products have been deployed at scale in national key projects such as deep-sea oil & gas — helping replace imported critical materials with reliable domestic supply.
Contact Us
· Website: www.sxhainuo.com
· Email: xinshu.li909@sxhainuo.com
· Tel: +86 189 3972 3227 / +86 199 3569 6137
· Plant: Macun Park, Gaoping Economic Development Zone, Shanxi, China
Looking for a grade tailored to your formulation? Send us your density, strength and particle-size targets — our technical team will recommend the optimal Hainuo model.
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