Poly-Texx HPVT
Poly-Texx HPVT is a new self-lubricating Bearing Grade Composite containing PTFE Teflon as a solid lubricant. Typical applications include sleeve and flanged bearings for railroad safety appliances and service vehicles. Bushings and slide plates for the chemical and timber handling industry, and knuckle and pivot bearings for mining and off-road vehicle applications.
Its main attribute is a PV rating of 40,000. Its compressive strength (P) exceeds 40,000 PSI, and is capable of a low-load velocity (V) of over 50 SFM. The combination of excellent bearing properties, self-lubrication and low cost makes Poly-Texx HPVT a great choice for many demanding applications.
| Specification | Test | Value | Units |
| Specific Gravity, 73°F | D792 | .053 | Lb/in.3 |
| Tensile Strength @ Yield, 73°F | D638 | psi | |
| Tensile Modulus of Elasticity, 73°F | D638 | psi | |
| Tensile Elongation (at break), 73°F | D638 | % | |
| Flexural Strength, 73°F | D790 | 22,000 | psi |
| Flexural Modulus of Elasticity | D790 | psi | |
| Shear Strength, 73°F | D732 | 11,000 | psi |
| Compressive Strength – Ultimate | 40,000 | psi | |
| Compressive Strength at 2% Deformation | D695 | 40,000 | psi |
| Compressive Strength at 10% Deformation | D695 | 40,000 | psi |
| Deformation Under Load | < 1.0 | % | |
| Compressive Modulus of Elasticity, 73°F | D695 | .053 | |
| Compressive Strength ⊥ to Laminate (Modulus) | psi | ||
| Compressive Strength ⊥ to Laminate (Yield) | 20,000 | psi | |
| Compressive Strength ⊥ to Laminate (Ultimate) | 20,000 | psi | |
| Hardness, Durometer (Shore “D” scale) | D2240 | ||
| Hardness, Rockwell (Scale as noted) | D785 | 100 | Rockwell M |
| Izod Impact, Notched @ 73°F | D256 Type A | 2.3 | ft.lbs/in. of notch |
| Coefficient of Friction (Dry vs Steel) Static | PTM 55007 | 0.14 | |
| Coefficient of Friction (Dry vs Steel) Dynamic | PTM 55007 | 0.1 | |
| Maximum Static Bearing Load (P) | PTM 55007 | 34,000 | psi |
| Maximum Unlubricated No Load Bearing Velocity (V) | PTM 55007 | 50 | ft/minute |
| Maximum Limiting PV (Unlubricated) | PTM 55007 | 40,000 | psi x ft/min. |
| Wear Factor “K” x 10-10 | PTM 55010 | 3.9 | Cubic in.-min/ft.lbs.hr |
| Sand Wheel Wear/Abrasion Test | 80 | UHMW=100 | |
| Minimum Mating Surface Hardness | Rockwell (Brinnell) | ||
| Coefficient of Linear Thermal Expansion | E-831 (TMA) | 5 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion // to Laminates | E-831 (TMA) | 5 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion I to Laminates | E-831 (TMA) | 5 | in/in/°F x 10-5 |
| Softening Point | °F | ||
| Heat Deflection Temperature 264 psi | D648 | °F | |
| Embrittlement Temperature | Cryogenic | °F Min. | |
| Continuous Service Temperature in Air | 275 | °F Max. | |
| Short Term Service Temperature | 430 | °F Max. | |
| Tg-Glass Transition (Amorphous) | D3418 | °F | |
| Melting Point (Crystalline) Peak | D3418 | °F | |
| Thermal Conductivity | F433 | BTU-in/(hr/ft2°F) | |
| Dielectric Strength Short Term | D149 | 200 | Volts/mil |
| Volume Resistivity | D257 | ohm/cm | |
| Surface Resistivity | D257 | ohm/cm | |
| Dielectric Constant, 106 Hz | D150 | ||
| Dissipation Factor, 106 Hz | D150 | ||
| Flammability @ 3.1mm(1/8 in.) UL94 | UL94 | ||
| Arc Resistance | seconds | ||
| Water Absorption, Immersion 24 Hours | D570 (2) | 0.5 | % |
| Water Absorption, Immersion Saturation | D570 (2) | 1.3 | % |
| Machinability Rating | 3 | 1=easy, 10=difficult | |
| Tubing Diameter Availability (Off the Shelf) | .50 | 60 | inches |
| Sheet Thickness Availability (Off the Shelf) | .030 | 6.0 | inches |
| Characteristics / Attributes | High Load Capability / High PV Rating / Self Lubricating |
