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  • 3M™ Glass Bubbles K42HS
  • 3M™ Glass Bubbles K42HS

    3M Product Number K42HS
    • Reduces thermal expansion and may contribute to cost savings
    • Reduces noise and vibration for improved acoustics
    • Improved dimensional stability through improved mold filling
    • Broad applications in diverse markets for versatile use
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    Typical Properties
    Attribute Name
    Value
    Brand
    3M™
    Capabilities
    Chemical Resistance, Increased Production Throughput, Lightweighting, Temperature Resistance
    Color
    White
    Color (unaided eye)
    White, powdery
    Composition
    Soda-lime-borosilicate glass
    Crush Strength
    7,500
    Density (g/cc)
    0.42
    Industries
    Compounding, Paints and Coatings, Rubber and Plastic, Transportation
    Manufacturing Segment
    Exterior, Glass, Interior
    Median Particle Diameter
    22
    Net Weight (Imperial)
    100 lb, 680 lb, 700 lb
    Strength (MPa)
    51.7
    Details
    • Reduces thermal expansion and may contribute to cost savings
    • Reduces noise and vibration for improved acoustics
    • Improved dimensional stability through improved mold filling
    • Broad applications in diverse markets for versatile use
    • Improves processing throughput for increased, and more, efficient production
    • Reduces final part weight without compromising mechanical integrity of the finished product

    3M™ Glass Bubbles K42HS have a density of 0.42 g/cc and an isostatic crush strength of 7,500 psi. The K42HS glass bubble is a versatile product used in a number of industries – wherever low density additives with intermediate crush strength are required. These glass bubbles can help compounders and design engineers with applications requiring reduced part weight.

    3M™ Glass Bubbles K42HS
    Improved dimensional stability through improved mold filling
    3M™ Glass Bubbles K42HS is a high-strength polymer additive made from a water-resistant and chemically stable soda-lime borosilicate glass. Our hollow glass microspheres can be used as a low-density filler material and are ideal for plastic and rubber parts created from injection molding, extrusion processes and other vigorous processing equipment. Injection molding is the most common method of producing parts out of plastic material. The process involves injecting molten plastic at high pressure into a part-shaped mold shaped in the form of a part. Once this plastic cools and solidifies, the mold opens and the part is ejected. 3M™ Glass Bubbles K42HS (PDF, 107.92 Kb) can be used in a number of other applications and markets including: automotive, construction, electronics, marine, paints and coatings — anywhere a strong additive is needed to reduce part weight without compromising strength.

    Streamlining and Improving Injection Molding
    Importantly, glass bubbles improve the injection molding process because they allow the plastic to fill the mold better than with other additives. The glass bubbles do not shrink, so users can make materials that fit the mold dimensions more precisely, thereby improving dimensional stability. Lastly, manufactures may observe warpage prevention because 3M™ Glass Bubbles K42HS help create an isotropic filling of the resin. Here's how it works: because the glass bubble is spherical, it has an aspect ratio of 1 meaning it does not align in the flow direction. Unlike other fillers, it doesn't cause anti-isotropy and shrinkage in one direction and filling in the other, which causes warpage. As we see, 3M glass bubbles K42HS deliver a number of benefits — dimensional stability, reduced warpage, increased cycle time and, most importantly, weight reduction in finished parts.

    Applications
    • Automotive
    • Construction materials
    • Compounding
    • Electronics
    • Marine
    • Paints
    • Coatings

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