Wholesale Lightweight Glass Bubbles Microballoons Filler Cenosphere Floating Beads/Hollow Glass Microspheres

Appearance: White, free-flowing powder

Microscopic appearance: Transparent, hollow, perfectly spherical

True density: 0.12~1.0 g/cm3

Bulk density: 0.10~0.62 g/cm3

Particle size: 2~130 um

Thermal conductivity: 0.038~0.085 W/m-K

Maximum compressive strength: 30000 psi

pH: 8~9.5

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Hollow Glass Microspheres

Hollow glass microspheres are micron-sized, smooth-surfaced hollow glass microspheres, primarily composed of soda-lime borosilicate glass. Under a microscope, they appear as hollow, transparent spheres. Hollow glass microspheres possess a variety of properties, including low density, high strength, low thermal conductivity, high wave transmittance, electrical insulation, high temperature resistance, and acid and alkali resistance. They also exhibit good flowability and chemical stability, making them a multifunctional, cutting-edge new material applicable across various fields. The application of hollow glass microspheres is significant for upgrading and optimizing the performance of various materials, and is crucial for lightweighting materials and energy conservation and emission reduction strategies.

Hollow Glass Microspheres Specification

Hollow Glass Sphere XL Series
Type	True Density (g/cm²)	Bulk Density (g/cm)	Compressive Strength (psi)	D50 (μm)	D90 (μm)	Application
XL15	0.13-0.17	0.08-0.09	500	80	≤120	Epoxy Tooling Board、Buoyancy Materials、Emulsion Explosive、..
XL20	0.18-0.22	0.10-0.12	500	65	≤110	Epoxy Tooling Board、Buoyancy Materials、Emulsion Explosive、..
XL25	0.23-0.27	0.13-0.15	750	65	≤100	Thermal Insulation Coating、Sealants、Buoyancy Materials
XL30	0.28-0.32	0.15-0.18	1500	55	≤85	Thermal lnsulation Coating、Buoyancy Materials
XL32	0.30-0.34	0.17-0.19	2000	45	≤80	Paints、SMC/BMC、Sealants、Putty
XL35	0.33-0.37	0.18-0.21	3000	40	≤70	Oifield Cement Slurry、Low-Density Drilling Fluid
XL38	0.36-0.40	0.19-0.22	5500	40	≤65	Paints、SMC/BMC、PVC Plastisols、Buoyancy Mateials
XL40	0.38-0.42	0.19-0.23	4000	40	≤70	Oifield Cement Slurry、Low-Density Drilling Fluid、Thermal...
XL42	0.40-0.44	0.21-0.24	8000	40	≤60	Oifield Cement Slurry、Low-Density Drilling Fluid
XL46	0.44-0.48	0.23-0.26	6000	40	≤70	Oilfield Cement Slurry、Low-Density Drilling Fluid、SMC/BMC
XL50	0.48-0.52	0.25-0.27	8000	40	≤70	Oifield Cement Slurry、Low-Density Drilling Fluid
XL60	0.58-0.62	0.29-0.34	12000	40	≤70	Oilfield Cement Slurry、Low-Density Drilling Fluid
XL60S	0.58-0.63	0.30-0.34	18000	35	≤55	Oifield Cement Slurry、Modified Plastics

Hollow Glass Sphere XS Series
Type	True Density (g/cm²)	Bulk Density (g/cm²)	Compressive Strength (psi)	D50 (μm)	D90 (μm)	Application
XS20	0.18-0.22	0.10-0.12	1000	60	85±5	Epoxy Tooling Board、Buoyancy Materials、Emulsion Explosive、..
XS22	0.20-0.24	0.11-0.13	1200	45	70±5	Epoxy Tooling Board、Buoyancy Materials、Sealants、Car Repair.
XS28	0.26-0.30	0.15-0.17	4000	45	55±5	Epoxy Tooling Board、Buoyancy Materials、Sealants、Car Repair.
XS38	0.36-0.40	0.19-0.22	5500	30	50±5	Composite Circuit Board、SMC、Sealants
XS42	0.40-0.44	0.21-0.24	8000	25	40±3	Rubber,Shoe Material,Sealants and Adhesives,SMC,Cementing..
XS60	0.58-0.62	0.29-0.33	28000	16	25±2	5G Plastics、Engineering Plastics
XS65	0.63-0.67	0.30-0.33	30000	13	20±2	5G Plastics、Engineering Plastics
XS70	0.75-0.80	0.33-0.35	30000	10	15±2	5G Plastics、Engineering Plastics

Advantages of Hollow Glass Microspheres

1.Lightweight & high volume: Hollow glass microspheres have a true density about 1/10 of traditional fillers, significantly reducing product specific gravity after filling.

2.Excellent dispersion & flowability: Their spherical shape ensures smooth flow in resins, better molding performance than irregular fillers. Being isotropic, they prevent orientation issues, reduce uneven shrinkage, improve dimensional stability, and minimize warping.

3.Thermal, acoustic & electrical insulation, low water absorption: Internal rarefied gas provides strong insulation and thermal shock resistance. Widely used in thermal materials and cable insulation due to high resistivity and low moisture uptake.

4.Low oil absorption: Spherical particles have low surface area, reducing resin demand. Even at high loading, viscosity increases slightly, improving processing and boosting efficiency by 10%-20%.

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Hollow Glass Microspheres Applications

Hollow Glass Microspheres are lightweight, hollow spherical particles widely used in many industries due to their low density, thermal insulation, and high compressive strength properties.

They are commonly used as lightweight fillers in paints, coatings, plastics, rubber, epoxy resins, adhesives, and composite materials. By adding hollow glass microspheres, manufacturers can reduce product weight, improve thermal insulation, enhance dimensional stability, and lower material consumption.

In the oil and gas industry, hollow glass microspheres are used in oil well cementing to reduce slurry density and improve performance. In aerospace and marine applications, they are used in syntactic foams and buoyancy materials because of their excellent strength-to-weight ratio.

Hollow glass microspheres are also widely applied in construction materials, automotive coatings, putty powder, and thermal insulating products. Their smooth spherical shape can improve flowability, reduce shrinkage, and enhance surface finish quality.