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The flame retardant grades of PBT are generally divided into three levels: UL94V-2, UL94V-1 and UL94V-0. UL94 V-2 is the lowest flame retardant grade, indicating that the plastic will self-extinguish when burning and will not continue to burn, but there will be a dripping phenomenon. UL94V1 is a medium flame retardant grade, indicating that the plastic will self-extinguish when burning and will not drip. UL94V0 is the highest flame retardant grade, indicating that the plastic will self-extinguish when burning, without dripping, and the burning time is very short, basically not burning.
The flame retardancy grade of PBT plastic products is closely related to the type and addition amount of flame retardants. Commonly used PBT flame retardants include brominated flame retardants, phosphorus-based flame retardants and ammonia-based flame retardants, etc. Brominated flame retardants usually have good flame-retardant effects, but they have the disadvantages of high volatility and significant environmental impact. Phosphorus-based flame retardants have the advantages of good flame retardant effect and low volatility, and are currently relatively ideal flame retardants for PBT. Nitrogen-based flame retardants are environmentally friendly, but their flame-retardant effects are relatively poor.
Advantages:
1. Excellent flame retardant performance: Flame-retardant PBT materials can pass high flame retardant grades such as UL94 V-0, have self-extinguishing properties, and can effectively prevent the spread of fire.
2. High strength and heat resistance: It features excellent mechanical strength and high-temperature resistance (with a long-term service temperature of over 120°C), making it suitable for harsh environments.
3. Excellent electrical insulation: High dielectric strength and arc resistance make it widely used in electronic and electrical insulation components.
4. Chemical resistance and moisture resistance: It has strong resistance to oil stains, solvents and humid environments, and excellent dimensional stability.
5. Easy to process and environmentally friendly: The injection molding efficiency is high, and some halogen-free flame-retardant models comply with environmental protection regulations (such as ROHS), meeting the demands of modern industry.
Application:
1. Electronics and Electrical: Flame-retardant PBT is widely used in connectors, relays, switches and other electronic components to ensure safe and reliable insulation and flame-retardant performance.
2. Automotive industry: Applied to sensor housings, wire harness terminals, vehicle lamp assemblies, etc., meeting the requirements of high-temperature resistance and fire resistance.
3. Household appliances: Commonly found in components such as electric irons, coffee machines, and sockets, they are both flame-retardant and durable.
4. Industrial equipment: Used for motor housings, circuit breakers, and industrial control components, it is suitable for harsh environments and mechanical loads.
5. Lighting field: LED lamp holders, lampshades, etc. adopt flame-retardant PBT to ensure safe use at high temperatures.
The flame retardant grades of PBT are generally divided into three levels: UL94V-2, UL94V-1 and UL94V-0. UL94 V-2 is the lowest flame retardant grade, indicating that the plastic will self-extinguish when burning and will not continue to burn, but there will be a dripping phenomenon. UL94V1 is a medium flame retardant grade, indicating that the plastic will self-extinguish when burning and will not drip. UL94V0 is the highest flame retardant grade, indicating that the plastic will self-extinguish when burning, without dripping, and the burning time is very short, basically not burning.
The flame retardancy grade of PBT plastic products is closely related to the type and addition amount of flame retardants. Commonly used PBT flame retardants include brominated flame retardants, phosphorus-based flame retardants and ammonia-based flame retardants, etc. Brominated flame retardants usually have good flame-retardant effects, but they have the disadvantages of high volatility and significant environmental impact. Phosphorus-based flame retardants have the advantages of good flame retardant effect and low volatility, and are currently relatively ideal flame retardants for PBT. Nitrogen-based flame retardants are environmentally friendly, but their flame-retardant effects are relatively poor.
Advantages:
1. Excellent flame retardant performance: Flame-retardant PBT materials can pass high flame retardant grades such as UL94 V-0, have self-extinguishing properties, and can effectively prevent the spread of fire.
2. High strength and heat resistance: It features excellent mechanical strength and high-temperature resistance (with a long-term service temperature of over 120°C), making it suitable for harsh environments.
3. Excellent electrical insulation: High dielectric strength and arc resistance make it widely used in electronic and electrical insulation components.
4. Chemical resistance and moisture resistance: It has strong resistance to oil stains, solvents and humid environments, and excellent dimensional stability.
5. Easy to process and environmentally friendly: The injection molding efficiency is high, and some halogen-free flame-retardant models comply with environmental protection regulations (such as ROHS), meeting the demands of modern industry.
Application:
1. Electronics and Electrical: Flame-retardant PBT is widely used in connectors, relays, switches and other electronic components to ensure safe and reliable insulation and flame-retardant performance.
2. Automotive industry: Applied to sensor housings, wire harness terminals, vehicle lamp assemblies, etc., meeting the requirements of high-temperature resistance and fire resistance.
3. Household appliances: Commonly found in components such as electric irons, coffee machines, and sockets, they are both flame-retardant and durable.
4. Industrial equipment: Used for motor housings, circuit breakers, and industrial control components, it is suitable for harsh environments and mechanical loads.
5. Lighting field: LED lamp holders, lampshades, etc. adopt flame-retardant PBT to ensure safe use at high temperatures.
