PBT keyboard raw plastic material

Product Item : 893
Category： PBT Resin
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PBT materials have excellent toughness and fatigue resistance, good heat and weather resistance, excellent electrical properties, low water absorption, comprehensive performance, and wide applications. Strengthening and flame retardant modification can significantly improve its heat resistance, modulus, dimensional stability, and flame retardancy. PBT materials are widely used in industries such as automobiles and electronics, and have excellent mechanical properties, especially high rigidity and hardness. They have good heat resistance, and can reach a thermal deformation temperature of over 180C. They have good surface gloss properties, especially suitable for fast crystallization speed and good flowability of spray free electronic and electrical products, Excellent formability and good thermal stability, especially with low thermal expansion rate and size shrinkage rate. It is resistant to chemicals, solvents, weather, high dielectric strength, good electrical performance, low moisture absorption, and has minimal impact on electrical and dimensional stability.

Common modification methods for PBT materials:

1. Enhanced modification: By adding glass fiber to PBT, the bonding force between glass fiber and PBT resin is good. Adding a certain amount of glass fiber to PBT resin can not only maintain its original advantages such as chemical resistance and processability, but also significantly improve its mechanical properties and overcome the sensitivity of PBT resin to notches.

2. Flame retardant modification: PBT is a crystalline aromatic polymer. If no flame retardant is added, its flame retardancy belongs to UL94HB level. Only after adding flame retardant can it reach UL94V0 level. Commonly used flame retardants include halogenated flame retardants such as compounds, S203, phosphides, and nitrides.

3. Blended alloy modification. The main purpose of blending PBT with other polymers is to improve notch impact strength, improve warping deformation caused by molding shrinkage, and improve heat resistance. Blending is widely used domestically and internationally to modify it. The polymers used for blending modification of PBT mainly include PC, PET, etc. This type of product is mainly used in automobiles, electronics, and electric tools, and the proportion of fiberglass applications varies in different fields.


Physical Properties	Metric	English	Comments
Density	1.32 - 1.48 g/cc	0.0477 - 0.0535 lb/in³	Average value: 1.43 g/cc Grade Count:5
Water Absorption	0.0500 %	0.0500 %	Average value: 0.0500 % Grade Count:3
Linear Mold Shrinkage	0.00400 - 0.0150 cm/cm	0.00400 - 0.0150 in/in	Average value: 0.0101 cm/cm Grade Count:4
Linear Mold Shrinkage, Transverse	0.0120 - 0.0130 cm/cm	0.0120 - 0.0130 in/in	Average value: 0.0123 cm/cm Grade Count:3

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell M	90.0 - 95.0	90.0 - 95.0	Average value: 91.7 Grade Count:3
Tensile Strength, Ultimate	45.0 - 84.0 MPa	6530 - 12200 psi	Average value: 57.3 MPa Grade Count:4
Elongation at Break	3.00 - 3.70 %	3.00 - 3.70 %	Average value: 3.30 % Grade Count:3
Flexural Yield Strength	70.0 - 123 MPa	10200 - 17800 psi	Average value: 89.4 MPa Grade Count:5
Flexural Modulus	3.40 - 5.20 GPa	493 - 754 ksi	Average value: 4.22 GPa Grade Count:4
Compressive Yield Strength	54.0 - 93.0 MPa	7830 - 13500 psi	Average value: 68.7 MPa Grade Count:3
Izod Impact, Notched	0.700 - 1.10 J/cm	1.31 - 2.06 ft-lb/in	Average value: 0.833 J/cm Grade Count:3
Izod Impact, Notched (ISO)	3.50 - 3.50 kJ/m² @Temperature -30.0 - -30.0 °C	1.67 - 1.67 ft-lb/in² @Temperature -22.0 - -22.0 °F	Average value: 3.50 kJ/m² Grade Count:1
Charpy Impact, Notched	0.350 - 0.350 J/cm² @Temperature -30.0 - -30.0 °C	1.67 - 1.67 ft-lb/in² @Temperature -22.0 - -22.0 °F	Average value: 0.350 J/cm² Grade Count:2
Taber Abrasion, mg/1000 Cycles	15.0 - 28.0	15.0 - 28.0	Average value: 20.3 Grade Count:3

Electrical Properties	Metric	English	Comments
Electrical Resistivity	1.00e+15 - 1.00e+16 ohm-cm	1.00e+15 - 1.00e+16 ohm-cm	Average value: 8.20e+15 ohm-cm Grade Count:5
Dielectric Strength	24.0 - 25.0 kV/mm	610 - 635 kV/in	Average value: 24.3 kV/mm Grade Count:3
Arc Resistance	80.0 - 130 sec	80.0 - 130 sec	Average value: 112 sec Grade Count:3
Comparative Tracking Index	210 - 255 V	210 - 255 V	Average value: 238 V Grade Count:3

Thermal Properties	Metric	English	Comments
Melting Point	223 - 255 °C	433 - 491 °F	Average value: 251 °C Grade Count:4
Deflection Temperature at 0.46 MPa (66 psi)	120 - 220 °C	248 - 428 °F	Average value: 186 °C Grade Count:5
Deflection Temperature at 1.8 MPa (264 psi)	90.0 - 195 °C	194 - 383 °F	Average value: 130 °C Grade Count:4
Flammability, UL94	HB - V-0	HB - V-0	Grade Count:4