Development prospects and trends of hollow glass beads

Update time:12-09-2020

Hollow glass beads are hollow glass spheres with tiny s […]

Hollow glass beads are hollow glass spheres with tiny sizes, which are inorganic non-metallic materials. The typical particle size range is 10-180 microns, and the bulk density is 0.1-0.25 g/cm3. It has the advantages of light weight, low thermal conductivity, sound insulation, high dispersion, good electrical insulation and thermal stability. It is a kind of developed since 2008 A new lightweight material with a wide range of uses and excellent performance.

The color is pure white, and it can be widely used in any products that have requirements for appearance color.

Light weight and large volume. The density of hollow glass beads is about one tenth of the density of traditional filler particles. After filling, it can greatly reduce the basis weight of the product, replace and save more production resins, and reduce product costs.

It has an organically modified (lipophilic) surface. Hollow glass beads are easy to wet and disperse, and can be filled in most thermosetting thermoplastic resins, such as polyester, epoxy, polyurethane, etc.

High dispersion and good liquidity. Since hollow glass beads are tiny spheres, they have better fluidity in liquid resin than flake, needle or irregular shape fillers, so they have excellent mold filling performance. What's more important is that the small microbeads are isotropic, so there is no inconsistency in the shrinkage rate of different parts caused by the orientation, and the dimensional stability of the product is ensured without warping.

Heat insulation, sound insulation, insulation, low water absorption rate. The inside of the hollow glass beads is a thin gas, so it has the characteristics of sound insulation and heat insulation, and is an excellent filler for various heat preservation and sound insulation products. The thermal insulation properties of hollow glass microspheres can also be used to protect the product from the thermal shock caused by the alternation between rapid heating and rapid cooling conditions. High specific resistance and extremely low water absorption make it widely used in the processing and production of cable insulation materials.

Low oil absorption. The particles of the sphere determine that it has the smallest specific surface area and low oil absorption. During use, the amount of resin can be greatly reduced. Even under the premise of high addition, the viscosity will not increase much, which greatly improves the production and operating conditions. Increase production efficiency by 10% to 20%.

According to statistics from the World Patent Database, in the past 30 years, there have been more than 50 inventions involving hollow glass beads at home and abroad, half of which are preparations and the other half are applications. In the past fifteen years, less than one-third of the patents related to the preparation of hollow glass microspheres have been used, and the remaining two-thirds are applications. It can be seen that hollow glass microspheres have entered the application development stage.