Glass microsphere plays a very important role in production and life. Glass microsphere not only has the advantages of light weight, low thermal conductivity, high strength and good chemical stability, but also has hydrophilic and hydrophobic properties on the surface, which is easy to disperse in organic material system. What are the main characteristics of glass beads?
Main characteristics of glass bead
1. It can scatter light in the visible spectrum. The glass material is actually colorless and transparent, but because the glass bead has a scattering effect on the light in the full visible spectrum, it looks white. However, when it is added to colored materials, it also scatters the light of material color, so it can be widely used in any material with requirements for appearance color without affecting the original material color.
2. Low density. The density of glass bead is about one tenth of that of traditional filler particles. After filling, the base weight of the product can be greatly reduced. The larger volume makes it replace a large number of other raw materials, reducing the product cost.
3. It is lipophilic. Hollow glass beads are easy to wet and disperse, and can be filled in most thermosetting thermoplastic resins, such as polyester, epoxy resin, polyurethane, etc.
4. High dispersion and good liquidity. Because the glass bead is a tiny ball, it has better fluidity in liquid resin than the filler in sheet, needle or irregular shape, so it has excellent filling performance. More importantly, this kind of small bead is isotropic, so it will not produce the disadvantage of inconsistent shrinkage in different parts due to its orientation, which ensures the dimensional stability of the product and will not warp.
5. Low water absorption. The inside of glass bead is thin gas, so it has the characteristics of sound insulation and heat insulation, and is an excellent filler for various heat insulation and sound insulation products. The thermal insulation characteristics of glass beads can also be used to protect products from thermal shock caused by alternate changes between hot and cold conditions. Its high specific resistance and extremely low water absorption make it widely used for processing and producing cable insulation materials.
6. Low oil absorption. The particle size of the sphere determines that it has the smallest specific surface area and low oil absorption. The amount of resin can be greatly reduced in the use process, and the viscosity will not increase much even under the premise of high addition, which greatly improves the production and operation conditions, and can increase the production efficiency by 10%~20%.
ARTICLE SOURCE: haixumoliao
