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PBT plastics process features 说明
PBT plastics process features 说明
PBT polybutylene terephthalate (PBT) | technology 文章 | Daoqin plastics raw materials
本文 will detailed introductionpolybutylene terephthalate (PBT) （PBT）material property can features, application areas and processing process, is material selection and product design provide 参考.
detailed introduction
PBT plastics full 称叫做 polybutylene terephthalate (PBT), it is thermoplastic polyester, it advantages is strong/high degree relatively high, and fatigue resistance can excellent 良. it is types white pellets material, can can very more for/regarding this type plastics 都不太熟悉, is in active in 我们常常看不 to it application, it usually in industrial in by a large amount of use, therefore 今天我们一起 看看PBT plastics process features, for large has 帮助.
currently PBT plastics main/primary used for automotive upper, if 我们 发动 machine hot also has internal parts 我们都 need use to PBT plastics, also has electronics machine, versus machine parts 我们也会 use to PBT plastics, it in industrial and production in is application plastics 之一, is it function is can substitute/replace.
if need use PBT plastics 话, need in it injection molding front in 一百一十 degree to 一百二十 degree between drying small 时, this can ensure it in injection molding can more good molding and stability. injection molding is will plastics in high temperature lower melt 化, rear hot will it to mold in, formed 一定 形状.
usually lower, PBT plastics molding temperature degree is 二百五十摄氏 degree 至二百七十摄氏 degree between, mold temperature control in 六十摄氏 degree can, this type of melt PBT一旦遇 to mold 就会迅 speed 凝结, therefore made as time is relatively short, is nozzle temperature degree need control 当. if low 话就会 in runner cold 凝, if high also easy 引起材 material separation understanding 变脆, cooling time long, therefore nozzle temperature degree is non important.
[材 material basic parameters ]
| density | 1.30~1.38 g/cm³ |
| melting point | 223~228°C |
| heat deflection temperature (HDT) | 60~210°C（ reinforcement rear can 达210°C） |
| tensile strength | 50~60 MPa（ reinforcement rear 120+MPa） |
| flexural modulus | 2400~2900 MPa |
| notched impact strength | 50~70 J/m |
| molding shrinkage | 1.5~2.5% |
| water absorption | 0.08~0.15% |
core advantages
- excellent chemical resistance: for large more has machine solvent agent, type and chemical product has good resistant can force
- good electrical insulation property: volume resistivity high, suitable for high pressure insulation application
- fast speed crystallization: cooling speed degree fast, molding cycle short, production efficiency high
- low water absorption: in wet ring in dimensions and property can small
- excellent creep resistance: in long negative lower deformation small
- reinforcement rear property can 突出: glass fiber reinforced PBT heat deflection temperature (HDT) can 达210°C above
application areas
connectors, electrical appliances, 开关, electrical container outer housing/shell, ring framework
点火 system parts, device housing/shell 体, 门锁, rear 视镜支架
electrical 熨斗底 sheet/plate, machine parts, machine housing/shell
泵体, 阀门, gears, bearings
light sleeve/set, light connectors
injection molding processing process
- drying 处理: 120°C drying 4-6 small 时, moisture content ≤0.03%
- material temperature degree: 230~270°C
- mold temperature degree: 40~80°C（ low mold temperature can shrink short molding cycle ）
- injection pressure: 60~100 MPa
- injection speed degree: fast speed （ utilizing PBT fast speed crystallization features ）
- precautions: PBT for hydrolysis 敏感, processing front must separation drying
above inner 容由Daoqin plastics raw materials has companytechnology 部整理 editor | 如需 understanding more more PBT polybutylene terephthalate (PBT) material 信息, electrical inquiry
联系 electrical 话: 19279864570（ micro 信同号）
