Posts tagged ‘hollow glass bubbles’

Hollow glass beads are small, lightweight, and spherical particles made of glass. They are commonly used in various industrial applications such as coatings, plastics, and composites due to their unique properties such as low thermal conductivity, low density, and good insulation.

The production process of hollow glass beads typically involves the following steps:

  1. Glass melting: Raw materials such as silica sand, soda ash, and limestone are melted in a furnace at high temperatures (around 1500°C) to form a glass melt.
  2. Glass refining: The glass melt is refined to remove impurities and homogenize the composition.
  3. Glass blowing: The glass melt is fed into a blowing machine that blows the molten glass into small hollow bubbles using compressed air. The size of the bubbles can be controlled by adjusting the air pressure.
  4. Cooling and solidification: The hollow glass bubbles are then cooled and solidified in a cooling chamber. The cooling process is critical to ensure the beads have a uniform size and shape.
  5. Separation and classification: The cooled glass beads are separated from the cooling medium and classified based on their size and density.
  6. Surface treatment: The surface of the hollow glass beads can be treated with various coatings or surface modifiers to improve their properties such as adhesion, hydrophobicity, and compatibility with different matrices.
  7. Packaging and shipping: The final product is packaged in bags, drums, or bulk containers and shipped to customers.

Overall, the production of hollow glass beads is a complex process that requires precise control of various parameters such as temperature, pressure, and cooling rate to ensure consistent quality and performance.

Single From a cost perspective, if the hollow glass bubbles per unit mass of the same price, you should use the lowest possible density of hollow glass microspheres, so low unit cost.If just from a performance standpoint, because the larger the lower the density of the hollow glass microspheres diameter, large diameter also reduces the conductivity between the zinc coating, which reduces the resistance to salt spray paint, and therefore should be chosen particle size as small as hollow glass microspheres.There are on the one hand I must mention that, due to the formulation of other fillers such as zinc and iron phosphate high density, when the coating solution is stirred crashed hollow glass microspheres, and in the spray when a low intensity hollow glass microspheres are easily broken failure. Therefore, the density of the microspheres can not be selected too large, the particle size can not be too large, and the strength is sufficient.

Proposal to add the following methods:
In order to take full advantage of the characteristics of the hollow microspheres, recommended adding a last resort, that is added to the beads into the final as low speed mixing equipment dispersed using low shear force, because the spherical beads mobility well, between the friction is not large, so it is easy to disperse. You can complete a short wet, slightly extended mixing time to achieve uniform dispersion.
Beads chemically inert, non-toxic. However, because of a very light, so they need special attention added.Recommended stepwise addition method, which is the amount for each remaining 1/2 beads gradually added, this can be good to avoid beads float into the air and dispersed more complete.

Sinosteel Maanshan New Material Technology Co., Ltd.