闃荤噧PBT B4406G4|宸存柉澶珅鍔犵簴20%
闃荤噧PBT B4406G4|宸存柉澶珅鍔犵簴20%
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Injection molding problem poly (butylene terephthalate)(PBT) is a general engineering plastic. The melting point of PBT is 225 ~ 235 掳C, and the crystallinity of PBT is up to 40% . The viscosity of PBT MELT is less affected by temperature than shear stress, so the effect of injection pressure on the melt fluidity of PBT is obvious in injection molding. PBT has good fluidity and low viscosity in the melting state, which is next to nylon. Anisotropy of PBT molded parts. POLYBUTYLENE terephthalate (PBT) is easily degraded under high temperature in water. When choosing screw injection molding machine for injection molding machine. The following points should be considered. 1 the material consumption of the product should be controlled at 30% ~ 80% of the rated injection quantity of the injection molding machine. It is not suitable to produce small products with large injection molding machine. The three-stage progressive screw should be used, the ratio of length to diameter is 15 ~ 20, and the compression ratio is 2.5 ~ 3.0. Self-locking nozzle shall be used with a heating and temperature control device. When molding flame-retardant PBT, the relevant parts of injection molding machine should be treated with anticorrosion.
