HYDEX® 4101 & 4101L PBT-P (POLYBUTYLENE TERAPHALATE POLYESTER)
Material Information
Hydex® 4101 and 4101L are PBT polyesters (PolyButylene Teraphalate Polyester), which are semi-crystaline thermoplastics that offer outstanding machinability. Hydex® 4101L is an internally lubricated grade that is designed for use in higher wear resistance, PV range, and lower coefficient of friction applications. Hydex® 4101 and 4101L have excellent mechanical properties, no center line porosity, and a low coefficient of friction and wear. Their excellent chemical resistance is an improvement over acetals and will not crack or craze in chlorine. They also have a very low moisture absorption rate, as much as 15 times less than nylon. They outperform UHMW because they are able to withstand steam cleaning temperatures. Overall, Hydex® 4101 and 4101L make good replacements for brass, aluminum, steel, UHMW, and acetal. Hydex® 4101 and 4101L are tough materials that are less brittle than PET so they will not chip or contaminate food products. This makes them FDA, USDA, and 3A Dairy compliant in a natural white color. Hydex® 4101 and 4101L are also available in a black color and come in the forms of rod and sheet.
Application
- Food piston pumps
- Valves and valve bodies
- Feeder blocks
- Timing screws
- Gears
- Cams
- Bushings and bearings
- Wear strips
- Fuel pump components
- Fuel system connectors and rotors
Properties
- No center line porosity
- Superior chemical resistance
- Outstanding machinability
- Excellent wear properties
- Very low moisture absorption
- Low coefficient of friction
- Good impact strength and ductility
- Hard and durable surface
- FDA, USDA, and 3A Dairy compliant (natural)
Typical Properties of Hydex 4101 (PBT-P) |
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Physical |
Astm Test Method |
Hydex® 4101 |
| Density (lb/in^3) | D792 | 0.047 |
| Specific Gravity | D792 | 1.31 |
| Water Absorption @ 24 hours (%) | D570 | 0.07 |
Mechanical |
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| Tensile Strength (PSI) | D638 | 9,400 |
| Tensile Modulus (PSI) | D638 | 425,000 |
| Tensile Elongation at Break (%) | D638 | 50 |
| Flexural Strength (PSI) | D790 | 11,600 |
| Flexural Modulus (PSI) | D790 | 420,000 |
| Compressive Strength (PSI) | D695 | 11,000 |
| Compressive Modulus (PSI) | D695 | – |
| Izod Impact (Notched), ft-lb/in | D256 | 0.7 |
| Rockwell Hardness | D785 | R120 |
Thermal |
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| Coefficient of Thermal Expansion, 10^-5/°F |
D696 | 4.5 |
| Heat Deflection Temperature 264 psi, ºF | D648 | 200 |
| Melting Point, °F | D3418 | 420 |
| Continous Service Temp (Operating), °F | – | 221 |
| Thermal Conductivity, BTU-in/hr-ft² °F | C177 | – |
| Flammability Rating | UL94 | HB |
Electrical |
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| Dielectric Strength, Short Term, (Volts/Mil) @ .125″ Thick |
D149 | 410 |
| Volume Resistivity (ohm-cm) @ 50% RH | D257 | 4.50 x 10^16 |
| Dielectric Constant at 60 Hz | D150 | 3.3 |
| Dissipation Factor at 60 Hz | D150 | 0.002 |
Typical Properties of Hydex 4101L (PBT-P) |
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Physical |
Astm Test Method |
Hydex® 4101L |
| Density (lb/in^3) | D792 | 0.049 |
| Specific Gravity |
D792 | 1.36 |
| Water Absorption @ 24 hours (%) | D570 | 0.07 |
Mechanical |
||
| Tensile Strength (PSI) | D638 | 7,200 |
| Tensile Modulus (PSI) | D638 | 380,000 |
| Tensile Elongation at Break (%) | D638 | 40 |
| Flexural Strength (PSI) | D790 | 10,600 |
| Flexural Modulus (PSI) | D790 | 390,000 |
| Compressive Strength (PSI) | D695 | 11,000 |
| Compressive Modulus (PSI) | D695 | – |
| Izod Impact (Notched), ft-lb/in | D256 | 0.7 |
| Rockwell Hardness | D785 | R110 |
Thermal |
||
| Coefficient of Thermal Expansion, 10^-5/°F |
D696 | 5 |
| Heat Deflection Temperature 264 psi, ºF | D648 | 195 |
| Melting Point, °F | D3418 | 420 |
| Continous Service Temp (Operating), °F | – | 221 |
| Thermal Conductivity, BTU-in/hr-ft² °F | C177 | – |
| Flammability Rating | UL94 | HB |
Electrical |
||
| Dielectric Strength, Short Term, (Volts/Mil) @ .125″ Thick |
D149 | – |
| Volume Resistivity (ohm-cm) @ 50% RH | D257 | – |
| Dielectric Constant at 60 Hz | D150 | – |
| Dissipation Factor at 60 Hz | D150 | – |
NOTE:
The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.