HYDEX® 4101 & 4101L PBT-P (POLYBUTYLENE TERAPHALATE POLYESTER)

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)

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

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

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

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)

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.