Hollow Glass Microspheres

Q: How do Hollow Glass Microspheres reduce material weight?

They use a hollow microstructure to lower system density while maintaining useful compressive performance. In typical engineering applications, they can support 10–35% system weight reduction compared with solid fillers.

Q: What density range is available?

Typical true density ranges from 0.15–0.60 g/cm³. The right density should be selected according to target weight reduction, compressive strength, processing method, and final application.

Q: What particle size should I choose?

Typical D50 particle size is 30–60 μm and D90 is 50–100 μm. Smaller or more controlled particle size can improve dispersion, surface finish, and processing stability.

Q: Can Hollow Glass Microspheres be used in plastics and composites?

Yes. They can be used in PP, PA, SMC, PMMA, and other composite systems to reduce density, support dimensional stability, and maintain balanced mechanical performance when properly dispersed.

Q: Are Hollow Glass Microspheres suitable for coatings and adhesives?

Yes. In coatings and adhesives, Hollow Glass Microspheres can reduce density, improve flowability, lower shrinkage, and support thermal insulation or reflective performance, depending on the formulation.

Q: What should be tested before bulk production?

Before bulk production, buyers should test density reduction, compressive strength, dispersion, resin compatibility, processing shear, addition ratio, water absorption, and long-term stability under the target application conditions.

Q: Can Ocean Elite support custom Hollow Glass Microspheres?

Yes. Ocean Elite can support grade selection based on density, particle size distribution, compressive strength, surface treatment, resin compatibility, packaging format, and application requirements.

Lightweight Low-Density Fillers for Advanced Material Systems

Ocean Elite Hollow Glass Microspheres are micron-scale lightweight inorganic fillers designedto reduce system density, improve processing flowability, and support stable performance incomposites, coatings, adhesives, sealants, plastics, rubber, and low-density oilfield cementingapplications.

Low Density

High Strength

Good Flowability

Controlled Particle Size

Composite Compatibility

Multiple HGM Grades

Common and high-strength series available for different density and pressure requirements.

Application-Based Selection

Suitable for composites, coatings, adhesives, sealants, plastics, rubber, and oilfield cementing.

Engineering Parameter Support

Density, compressive strength, particle size, and thermal conductivity data support material evaluation.

Custom Selection Support

Grade recommendation can be adjusted according to target density, processing method, and application environment.

Batch Testing Focus

Pilot-scale validation is recommended before bulk production to reduce formulation and processing risk.

High-Performance Hollow Glass Microspheres from Ocean Elite

Ocean Elite Hollow Glass Microspheres are lightweight, high-strength micron-scale hollow inorganic fillers used to reduce material density while maintaining useful compressive performance. Their hollow spherical structure helps improve lightweighting efficiency, processing flowability, dimensional stability, and formulation flexibility in advanced material systems.

Compared with traditional solid fillers, Hollow Glass Microspheres can help reduce the final product weight while supporting balanced mechanical performance and better processing behavior. They are widely used in lightweight composite materials, adhesives, sealants, coatings, rubber systems, engineering plastics, and low-density oilfield cementing formulations.

For engineering use, buyers should select Hollow Glass Microspheres based on true density, compressive strength, particle size distribution, thermal conductivity, matrix compatibility, addition ratio, and processing conditions. A suitable grade helps reduce breakage during mixing, molding, pumping, or coating application.

Low density for lightweight formulation
Controlled particle size for stable dispersion
Compressive strength for processing reliability
Good flowability for easier material handling
Suitable for coatings, adhesives, plastics, rubber, and cementing systems
Custom grade selection based on application requirements

Hollow Glass Microspheres Series TDS Parameters

Ocean Elite Hollow Glass Microspheres are available in common density grades and high-strength grades to support different lightweighting, compressive strength, thermal insulation, and processing requirements. Engineers can compare test pressure, tap density, true density, thermal conductivity, and particle size distribution before selecting the most suitable grade.

Series	Grade	Test Pressure MPa / Psi	Tap Density g/cm³	True Density g/cm³	Thermal Conductivity W/m·K	D10 μm	D50 μm	D90 μm
Common Series	HGM15	3.4 / 500	0.10	0.15	0.040	28	57	102
Common Series	HGM20	5.2 / 750	0.12	0.20	0.048	23	43	73
Common Series	HGM25	6.9 / 1000	0.15	0.25	0.050	23	43	73
Common Series	HGM30	13.8 / 2000	0.18	0.30	0.056	21	41	72
Common Series	HGM38	37.9 / 5500	0.22	0.38	0.065	18	37	66
Common Series	HGM46	55.2 / 8000	0.28	0.46	0.078	18	35	62
Common Series	HGM50	68.9 / 10000	0.30	0.50	0.082	14	32	52
Common Series	HGM60	110 / 16000	0.36	0.60	0.093	13	28	51
High-Strength Series	HGM25HS	13.8 / 2000	0.15	0.25	0.051	23	43	73
High-Strength Series	HGM30HS	27.6 / 4000	0.18	0.30	0.056	19	38	65
High-Strength Series	HGM38HS	55.2 / 8000	0.22	0.38	0.065	18	37	66
High-Strength Series	HGM46HS	110 / 16000	0.28	0.46	0.078	16	35	62
High-Strength Series	HGM60HS	124 / 18000	0.36	0.60	0.093	13	28	51

Selection Note:
Lower-density grades are suitable when weight reduction and thermal insulation are the main targets. High-strength grades are more suitable for injection molding, high-pressure processing, SMC composites, oilfield cementing, and applications where microsphere breakage risk must be controlled.

Hollow Glass Microspheres Grades & Selection Guide

Different HGM grades are not selected by density alone. A reliable selection should consider target weight reduction, compressive strength requirement, processing shear force, particle size distribution, thermal conductivity, and compatibility with the matrix system.

Grade Direction	Main Feature	Suitable Applications	Selection Note
Low-Density Grades such as HGM15 / HGM20	Low thermal conductivity and strong weight-reduction efficiency	Reflective thermal insulation coatings, adhesive systems, lightweight formulations	Suitable when density reduction is the main target and compressive strength requirements are moderate.
Medium-to-High Density Grades such as HGM38 / HGM46	Balanced lightweighting and molding stability	Coatings, primers, construction materials, oilfield cement slurry systems	Suitable when both weight reduction and processing stability are required.
High-Density High-Strength Grades such as HGM46HS / HGM60HS	Higher compressive strength for demanding processing conditions	Engineering plastics, SMC composites, high-pressure forming, deep-sea buoyancy-related materials	Suitable for injection molding, pressure conditions, and applications requiring stronger particle integrity.
Surface-Treated / Custom HGM	Improved dispersion and interfacial bonding	Resin systems, coatings, adhesives, composite formulations	Suitable when matrix compatibility and dispersion performance are important.

Note：Final grade selection should be confirmed according to density target, compressive strength requirement, matrix compatibility, processing method, and application environment.

How to Choose the Right Hollow Glass Microspheres Grade?

Select the right grade based on density target, compressive strength, particle size distribution, matrix compatibility, processing conditions, and final product performance requirements. A suitable grade helps reduce weight while keeping the material stable during mixing, molding, coating, or field application.

Lower Density Requirement

Higher Strength Requirement

Smaller Particle Size

High Temperature Application

Key Selection Factors for Hollow Glass Microspheres

True Density

True density controls the final lightweighting effect of the material system. Lower density helps reduce product weight, but it should be balanced with compressive strength and processing requirements.

Compressive Strength

Compressive strength shows whether the microspheres can withstand mixing, compounding, pumping, or molding without excessive breakage. Higher strength grades are better for high-pressure or high-shear applications.

Particle Size Distribution

Particle size affects dispersion, surface finish, flowability, equipment stability, and clogging risk. Controlled D50 and D90 values help improve processing consistency in advanced material systems.

Recommended Addition Ratio

The recommended addition ratio is commonly adjusted from 3–20 wt% according to target density and processing performance. Higher loading should be tested first because it may increase breakage risk during mixing.

Matrix Compatibility

Compatibility with PP, PA, epoxy, polyurethane, coatings, adhesives, and other systems affects dispersion and bonding. Surface treatment or coupling agents may help improve material performance.

Hollow Glass Microspheres Applications by Industry

Composite Plastic Systems

Hollow Glass Microspheres help reduce composite density while supporting stable strength and dimensional performance. Recommended addition is generally 5–25 wt%, depending on resin type and processing conditions.

Best-fit use: PP, PA, SMC, PMMA, lightweight plastic parts, and composite components.

Adhesives and Sealants

In adhesives and sealants, Hollow Glass Microspheres help reduce weight, improve flowability, and lower shrinkage. Recommended addition is generally 3–10 wt% for better workability and formulation balance.

Best-fit use: Lightweight adhesives, sealants, filling compounds, and bonding systems.

Low-Density Oilfield Cementing

Hollow Glass Microspheres help reduce cement slurry density and support low-density oilfield cementing systems. Recommended addition is generally 5–20 wt%, with pressure performance verified before field use.

Best-fit use: Low-density cement slurry, oilfield cementing, drilling systems, and pressure-resistant filler applications.

Coatings and Industrial Coatings

Hollow Glass Microspheres help reduce coating density, improve insulation performance, and support better application flow. Recommended addition is generally 5–10 wt%, depending on coating type and dispersion requirements.

Best-fit use: Thermal insulation coatings, anti-corrosion coatings, reflective coatings, and industrial surface protection.

Engineering Plastics & SMC Components

High-strength HGM grades help reduce weight while improving processing stability in demanding plastic and SMC applications. Grade selection should focus on compressive strength, particle size, and resin compatibility.

Best-fit use: Engineering plastics, SMC parts, high-pressure molding, and structural composite components.

Hollow Glass Microspheres Sourcing Do’s and Don’ts

Recommended Sourcing Practices

✅ Define the target density, compressive strength, flowability, and shrinkage requirements before grade selection.
✅ Select grades by both density and compressive strength, not by density alone.
✅ Test addition ratio and processing window through small-scale samples before bulk use.
✅ Check compatibility with PP, PA, epoxy, polyurethane, coating, adhesive, or cementing systems.
✅ Request TDS data, particle size information, and application guidance before final selection.

Common Sourcing Mistakes

❌ Using high loading ratios without testing microsphere breakage during mixing.
❌ Ignoring particle size distribution when surface finish or processing stability matters.
❌ Selecting low-density grades for high-pressure applications without strength verification.
❌ Overlooking surface treatment or coupling agents in resin-based systems.
❌ Choosing grades only by price or density instead of final application performance.

Customization & Technical Support

Ocean Elite can support buyers and engineers with application-based Hollow Glass Microspheres grade selection. The goal is to help match the right density, compressive strength, particle size, and compatibility requirements before bulk production.

Particle size distribution adjustment
Density range selection
Compressive strength grade matching
Surface treatment for resin compatibility
Coupling agent recommendation
Application-based sample support
Technical documentation and test data support
Packaging format customization

Quality-Controlled Hollow Glass Microspheres with Testing Documentation

Ocean Elite focuses on stable Hollow Glass Microspheres performance for engineering material applications. Key quality control points include true density, particle size distribution, compressive strength, moisture control, appearance, flowability, packaging condition, and batch consistency.

For engineers and technical buyers, stable quality helps reduce formulation risk, processing problems, and unexpected performance changes from sample testing to mass production.

Testing and Documentation Items:

Incoming raw material inspection
True density and particle size testing
Compressive strength evaluation
Moisture and appearance control
Batch traceability and stability assurance
Application-specific technical data support
Packaging inspection before delivery

Recommendation:
Before placing a bulk order, buyers should confirm the target formulation, processing method, testing standard, and expected application environment. This helps prevent mismatch between laboratory samples and real production conditions.

Frequently Asked Questions

1. What are Hollow Glass Microspheres used for?
Hollow Glass Microspheres are used as lightweight low-density fillers in composite plastics, adhesives, sealants, coatings, rubber systems, engineering plastics, and low-density oilfield cementing applications.

2. How do Hollow Glass Microspheres reduce material weight?
They use a hollow spherical structure to lower the overall density of the material system. Compared with solid fillers, they can help reduce system weight while maintaining practical compressive and processing performance.

3.What density range is available?
Typical true density ranges from 0.15 to 0.60 g/cm³, depending on grade. Lower-density grades are better for lightweighting and insulation, while higher-density grades generally offer stronger compressive performance.

4.What particle size should I choose?
Particle size should be selected according to dispersion, surface finish, processing equipment, and application requirements. Controlled D50 and D90 values help improve processing stability and reduce clogging or surface defects.

5.Can Hollow Glass Microspheres be used in plastics and composites?
Yes. They are commonly used in PP, PA, SMC, PMMA, engineering plastics, and composite systems to reduce density, improve dimensional stability, and support lightweight design.

6.Are Hollow Glass Microspheres suitable for coatings and adhesives?
Yes. In coatings, they help reduce coating density and improve thermal insulation or reflective performance. In adhesives and sealants, they help reduce weight, improve flowability, and lower shrinkage.

7.What should be tested before bulk production?
Buyers should test true density, compressive strength, particle size distribution, addition ratio, dispersion behavior, compatibility with the matrix system, and breakage rate under real processing conditions.

8.Can Ocean Elite support custom Hollow Glass Microspheres selection?
Yes. Ocean Elite can support grade recommendation based on target density, compressive strength, particle size, matrix compatibility, processing conditions, and final application requirements.