PBT is the latest and fastest-growing variety of general engineering plastics. The reason why it has become a rising star of engineering plastics is that it has excellent comprehensive performance, good molding processability and cost performance. PBT has excellent mechanical properties, high mechanical strength, good fatigue resistance and dimensional stability, and small creep. These properties also rarely change under high temperature conditions and are very suitable for manufacturing gearboxes in automotive parts. The gearbox has high requirements on the chemical resistance, dimensional stability and temperature resistance of the materials . Generally, oil- and temperature-resistant PBT is selected to add special flat glass fiber to ensure dimensional stability. PBT has excellent electrical properties, high volume resistivity and dielectric strength, excellent arc resistance, and extremely low hygroscopicity. It can also maintain stable electrical performance in humid and high temperature environments, making it an ideal material for manufacturing electronic and electrical parts.

        Model: Pocan B3233 HR Manufacturer: LANXESS

 

        Category: PBT + 33% GF Application: Automobile / Gearbox

(2) Basic requirements

 

       1. Mechanical characteristics-high modulus

 

       2. Chemical stability-lubricating oil

 

       3. Hydrolysis resistance-high temperature and high humidity test

 

       4. Low warpage and dimensional stability

 

       5. Good mobility, suitable for complex structural design

 

       6. Injection molding

 

(3) Material characteristics
 

       1. Add 33% GF to PBT base material, flexural modulus reaches 9100Mpa, tensile modulus (23 ° C): 9600Mpa

 

       2. PBT base material has good stability to engine oil, gasoline, lubricating oil, coolant, cleaning agent, cleaning agent

 

       3. Hydrolytic stability

 

       4. Good dimensional stability, small warpage rate

 

       5. PBT base material is a crystalline material with a melt volume index of 15cm3 / 10min

 

  6. Molding temperature: 250 ~ 270 ° C

2. VALOX ™ 420SE0

(1) Introduction

           Model: Valox 420SE0 Manufacturer: SABIC / SABIC

 

           Category: PBT + 30% GF Use: Electrical industry 

 

 

(2) Basic characteristics

 

        1. Fire and flame retardant: UL94 V-0 & 5VA

 

        2. Superior mechanical characteristics-high modulus needs to bear the load of the whole machine

 

        3. Good dimensional stability

 

        4. Good electrical characteristics-insulation and leakage index

 

        5. Require good resistance to UV and weathering stability

 

        6. Injection molding

 

(3) Material characteristics
 

        1. Fire retardant level: 0.71mmV-0, 2mm5VA UL 94 certification standard

 

        2. PBT added 30% GF reinforcement, bending modulus: 9400Mpa, tensile modulus: 11500Mpa

 

        3. PBT is reinforced by adding 30% GF, the mold shrinkage rate is 0.5 ~ 0.8%, and the size is stable compared to non-reinforced PBT

 

        4. Volume resistivity: 3.4E + 16 Ohm-cm ASTM D 257, leakage index: 3PLC UL 746A

 

        5.The substrate is PBT crystalline material, UV resistance level: F2, good weather stability

 

        6. Injection molding temperature: 255 ~ 275 ° C