1. 3M Products

3M™ Glass Bubbles iM30K

  • Reduce part weight
  • Improve dimensional stability
  • Differentiate resin formulations
  • Chemical stability and inertness
All Models
Product Details
  • Reduce part weight
  • Improve dimensional stability
  • Differentiate resin formulations
  • Chemical stability and inertness
  • Reduced dielectric constant
  • Thermal conductivity reduction
  • Temperature resistance

3M™ Glass Bubbles iM30K will change the way you think about plastic parts. This product has a density of 0.60 g/cm3 and an excellent isostatic crush strength of 27,000 psi / 1861 bar, providing an additive with a superior strength-to-density ratio for use in injection molding extrusion and sheet molding compounds. They can reduce final part weight by 15% or more without compromising mechanical integrity.

Don’t Wait, Reduce Part WeightFrom start to finish, 3M™ Glass Bubbles iM30K are about helping the production process and the quality of finished parts. Toward that end, weight reduction of 15% or more can be achieved in injection molded parts. These substantial weight reductions don’t come at the expense of quality. In fact, parts maintain strength, surface aesthetics and mechanical integrity with the use of 3M glass bubbles iM30K. Improving ThroughputReduce cycle time by 15-25% or more without compromising critical mechanical properties of finished parts. The secret? Faster cooling. Typically, cooling takes up most of a mold cycle. By using glass bubbles to reduce thermal mass, parts cool faster from the melt and cycle times can be considerably shortened. Fillers like talc and calcium carbonate may cost less but can actually increase part weight. Glass bubbles allow customers to make more parts per minute, per hour, per day and per year. Do More for SustainabilityImportantly, our 3M glass bubbles iM30K contribute to environmental sustainability. With a high strength-to-weight ratio, glass bubbles are ideal for lightweighting materials like plastics and composites. According to a single-site carbon footprint study conducted by 3M on one class of glass bubble popular for use in plastic manufacturing, the addition of 3M™ Glass Bubbles to injection molded parts had a neutral impact on the carbon footprint of the finished part. Additionally, lightweighting has known advantages such as improved fuel economy, easier handling of hand-held plastic parts and reduced shipping costs. Automotive Injection Molded Plastics3M glass bubbles iM30K can be used for many automotive injection molded parts. A typical automobile has 300 kg of plastic parts that contribute to vehicle weight. Using our glass bubbles can reduce the weight of these parts by up to 15%, which can help improve fuel economy. What are 3M™ Glass Bubbles?Our 3M glass bubbles are engineered hollow glass microspheres

Chemical Resistance, Increased Production Throughput, Lightweighting, Temperature Resistance
Color (unaided eye)
White, powdery
Soda-lime-borosilicate glass
Density (g/cc)
Density Range (g/cm3)
0.60 - 0.69
Rubber and Plastic, Transportation
Particle Size (D50 Micron)
Particle Size Range (D50 Micron)
10 - 19, 10 - 19, 10 - 19
Hollow spheres with thin walls
Strength (MPa)
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