Poly-Texx® HPV
Poly-Texx® HPV is a self-lubricating Bearing Grade Composite used in high load/low speed service. Typical applications include sleeve and flanged bearings for railroad safety appliance and rail service equipment. Bushings and slide plates for railroad service vehicle, and timber handling industry. Also proven to be successful as knuckle and pivot bearings for mining and off-road vehicle applications.
Poly-Texx® HPV is an unfilled version with an outstanding ability to handle high loads under vibration. Its ultimate compressive strength (P) exceeds 40,000 PSI. Poly-Texx HPV is capable of a low-load velocity (V) of up to 15 SFM. Its overall PV rating is 20,000. The combination of excellent bearing and wear properties, self-lubrication and low cost makes Poly-Texx® HPV a great choice for many demanding high load and vibration type applications.
| Specification | Test | Value | Units |
| Specific Gravity, 73°F | D792 | 1.33 | — |
| Tensile Strength @ Yield, 73°F | D638 | 13,000 | psi |
| Tensile Modulus of Elasticity, 73°F | D638 | psi | |
| Tensile Elongation (at break), 73°F | D638 | % | |
| Flexural Strength, 73°F | D790 | 20,000 | psi |
| Flexural Modulus of Elasticity | D790 | psi | |
| Shear Strength, 73°F | D732 | 10,000 | psi |
| Compressive Strength – Ultimate | 40,000 | psi | |
| Compressive Strength at 2% Deformation | D695 | N/A | psi |
| Compressive Strength at 10% Deformation | D695 | N/A | psi |
| Deformation Under Load | < 1 | % | |
| Compressive Modulus of Elasticity, 73°F | D695 | ||
| Compressive Strength ⊥ to Laminate (Modulus) | psi | ||
| Compressive Strength ⊥ to Laminate (Yield) | 40,000 | psi | |
| Compressive Strength ⊥ to Laminate (Ultimate) | 40,000 | 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 | 15 | ft/minute |
| Maximum Limiting PV (Unlubricated) | PTM 55007 | 20,000 | 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 | 20 | Rockwell (Brinnell) | |
| Coefficient of Linear Thermal Expansion (Tube Stock / Diametric) 1/8″ wall / 1/4″ wall | PTM | .3 / .8 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion (Sheet Stock) parallel to Laminates (Cross Directional Average) | PTM | 1.0 | in/in/°F x 10-5 |
| Coefficient of Thermal Expansion (Sheet Stock)perpendicular to Laminates (Thickness) | PTM | 3.0 | 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 | 257 | °F Max. | |
| Short Term Service Temperature | 350 | °F Max. | |
| Tg-Glass Transition (Amorphous) | D3418 | °F | |
| Melting Point (Crystalline) Peak | D3418 | °F | |
| Thermal Conductivity | F433 | 1.17 | 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) | 2.2 | % |
| Machinability Rating | 3 | 1=easy, 10=difficult | |
| Tubing Diameter Availability (Made to Order) | .50 | 60 | inches |
| Sheet Thickness Availability (Made to Order) | .030 | 6.0 | inches |
| Characteristics / Attributes | Very High Load / Self Lubricating / Vibration Resistant |
