The Complete Guide to Hainuo Hollow Glass Microspheres: Choose the Right Grade by Density & Strength

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:

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.

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.

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.

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.

Typical uses: lightweight drilling-fluid / mud additives (pressure-depleted zones, weak formations, lost-circulation drilling) and well-cementing slurry additives.

Applications by Industry

Three Steps to the Right Grade

1. 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. 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. 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

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.