59 0. 1 under oil lubrication. Download White Paper. 8 g. Thus, UHMWPE has a wider. 40. % UHMWPE in polyester resin brought down the value of μ to nearly half to that of polyester resin and 1/3rd of cotton polyester. 0 mil UHMW polyethylene backing, rubber adhesive, paper liner, temperature use range -30 degrees F to 225 degrees F. After friction and vibration tests, it was found that WS 2 reduced the coefficient of friction of TPU matrix with its excellent lubricating properties, and after adding UHMWPE, the coefficient of friction continued to drop to 0. This grade is often. The high molecular weight is what gives UHMW-PE a unique combination of high impact strength efficient of friction and abrasion resistance that outwears carbon steel 10 to 1 making it more suitable for applications where lower molecular weight grades fail. Ultra-high molecular weight polyethylene All existing data on UHMWPE indicate that for (UHMWPE) is a unique polymer with outstanding very elderly patients,. Table 3: Tyre Dragging Tests – Coefficients of Friction Coefficient of Friction Site No Grass Surface Dry Wet 1 2 4 5 White Clover Rye-grass (long) Browntop Agridark 0. Concrete (Dry) Rubber. 1 2. 1-0. 1 to 0. Most material orientation cases have a static coefficient range of 0. COEFFICIENT of FRICTION (DRY) against self - static: 40 psi : 0. 1 to 0. Under laboratory conditions, however, it. UHMWPE has no odor, no taste, and is harmless. The silicone free requirement is of the negative effect that silicone. Reduces maintenance and downtime in high-precision applications. 20 static, . coefficients UHMW Solid Lubricant E 500E 1000E 1200M-S COEFFICIENT OF FRICTION (AVERAGE) E 500E. Extremely high abrasion resistance. In comparison with other polyethylene, UHMWPE has lower coefficient of friction [5] [6] [7], higher mechanical strength [8,9] and abrasion resistance [10][11][12]. 8 shows the variation of friction coefficient of pure UHMWPE, MC- modified, AF-modified and AF/MC-modified composites at 0. Manufacturer of UHMW Sheets & Rods - UHMW Sheet, UHMWPE Rod, UHMWPE Sheet and Uhmwpe Plastic Sheets offered by Rajdeep Associates, Bengaluru, Karnataka. 5 Coefficient of friction (dynamic) 0. 03. There is a need for UHMW-PE with low friction properties and electrical conductivity in the automobile production industry. With TIVAR® Oil Filled, conveyors operate more. 20 on steel Dynamic . Reprinted with permission from [88]. 8 1 PA 6/6 PA ‐ 6 POM H ‐ C PET ‐ The coefficient of friction is an important tribological property of polymer materials. It has all of the properties of high-density polyethylene (HDPE), the ability to withstand intense acids and alkalis, and a variety of organic solvents. The operating temperature of UHMWPE is from -150°C to +90°C. Sort plastic materials: Click the down or up arrows or column headings to sort plastic materials or material properties. Materials: Virgin UHMW PE. 77 5 Wet Rubber 37. 5 – 0. 14. Thick caliper for extreme wear, durable abrasion resistant backing, long wear life,. High impact resistance. Figure 6 shows that the time-varying curves of the swing and composite motion friction coefficient of CoCrMo/UHMWPE contact pair in 25% bovine serum. The average price for HDPE is roughly $1. It could be seen that the friction coefficient of UHMWPE under dry sliding is about 0. 0: in/in/°F x 10-5: Melting Point (Crystaline Peak) 279-289 °F: Volume Resistivity >10 15: ohm-cm: Surface Resistivity >10 15: ohm-cm: Water. Introduction. 0 - 4. 07-0. Differences: There are so many differences between the products that a list is the best way to explain: PTFE is substantially much more expensive than UHMW. 02–0. UHMW PE, Unfilled. Reprocessed UHMW – Polystone® M Reprocessed offers an economical UHMW solution with a low friction coefficient and superior wear resistance, perfect for applications demanding high durability and smooth performance. In their reciprocating friction test, the friction coefficient was increased from 0. Ultra High Molecular Weight Polyethylene (UHMWPE) and High-Density Polyethylene (HDPE) are both extremely tough plastics with high abrasion and wear resistance. 51, and 0. 060 represents, in our experience, skis with below average gliding properties and would therefore have potential for improvements. 5 MPa • UHMWPE sterilized – Irradiated at 2. Keywords: UHMWPE, Dynamic friction coefficient, Reciprocating sliding. 15-. 0 MPa, and two. It is categorized as an engineering material, and offers a unique combination of wear and corrosion resistance, a low-friction surface, and high impact strength. When loading 10% MCF, the friction coefficient initially significantly increased from 0. Coefficient of Friction (Dry vs Steel) Static: PTM 55007: 0. The coefficient of friction between UHMW to UHMW/Steel surface is considered 0. Low Coefficient of Friction and Good Abrasion Resistance 3M™ UHMW Film Tape 3965 is often used in general industrial applications to help control squeaks and rattles due to vibration or wear of metal and plastic materials. The uhmw u channel stock guide rail has strong abrasion resistance, and its abrasion resistance is 5 times that of nylon 66 and 7 times that of carbon steel. 43. UHMW (Ultra High Molecular Weight Polyethylene) UHMW is used around the world in 1000's of applications from packaging, marine and aircraft industries. UHMW-PE has a recommended service temperature of about 180°F. The coefficient of friction of UHMWPE has intermediate values. 15-0. UHMW-PE based products offer a host of exceptional attributes that include high abrasion resistance, low coefficient of friction and one of the highest impact strength ratings of any thermoplastic. The second is the friction coefficient (Table 1). 0% untreated CNFs. 19: 0. Exceptionally High Wear0. Environment and disposal technology. They have values of friction coefficient for HDPE and UHMWPE . 1445 respectively where as the minimum coefficients of friction for UHMWPE-1 and UHMWPE-2 are 0. In particular, experimental wear tests showed that friction coefficient in HoS couples decreases with the contact pressure [14] and in-vivo measurements by means of instrumented hip implants. 09-0. 46 with increasing depth, but the static friction coefficient increases only from ∼0. 115 respectively. TIVAR® 1000 Virgin UHMW-PE components are often favored as solutions for bearings, bushings, chain guides, sprockets, gears, rollers, paddles, and scrapers. 2. Blanchet et al. Vertical lines, loads corresponding to. Because of its low coefficient of friction, UHMW-PE is self-lubricating; it replaces unwanted grease and oil in many applications such as bearings and conveyors. The initial friction coefficient of UHMWPE/Al 2 O 3 friction pair in dry friction, saline and distilled water lubrication conditions is higher and quite identical, and in plasma lubrication condition, the initial friction coefficient is the lowest. 7 0. The material is resistant to chemical corrosion and moisture absorption, and retains key physical properties to -200°C. Low coefficients of friction, wear resistant plastic materials – e. 2. 59 0. 28 vs . coefficient of friction, making it an excellent protection for surfaces or bearings that experience heavy wear. 2 approximately in the whole wear process, was higher than that of non-aged UHMWPE, and the friction coefficient of non-aged UHMWPE sample almost oscillated from 0. 2 Plastic polymers. 20 . 5 – 0. Fig. Colors: White, Green and Customized. The tension of transmission chain is calculated by dividing the transmitted power (indicated as kW or horsepower) by the chain speed and multiplying. Nolu-S has a better thermal conduc - tivity compared to standard UHMW. 2 /kg, and the cost for UHMW can be anything between $2– and –$6 /kg. 1 million or higher. Alternative Materials to HDPE and. 1. Steady-state coefficient of friction (COF) for CoCrMo or Ti6Al4V pin-like specimens against UHMWPE flat surfaces in Ringer’s solution at 37 °C (Fn = 30 N, L = 4 mm, frequency = 1 Hz and time = 3600 s). Thanks. Low friction. UHMW-PE with low coefficient of friction, electrical conductivity and silicone free. TIVAR 88-2 Ultra High Molecular Weight Polyethylene UHMW-PE UV stabilized shapes offer the lowest coefficient of friction of all TIVAR 88 grades. Good agreement with reported values of friction coefficient was obtained [6,16-18]. In this work, values for the coefficient of friction of a polyamide (nylon 6,6)/polymethyl methacrylate (PMMA. 2. Stocked as sheets, rods, tubes and profiles, it can be machined for your specific application. Translucent, 10. The relationship between initial coefficient of friction, μ i and surface energy (or attractive force) for ultra-high molecular weight polyethylene (UHMWPE) film is modeled and experimentally measured at low normal loads (15–75. 10 - 0. 15-. Superior sliding performance and high limiting pressure velocity. 28 Coefficient of Friction, Plastics to Plastic Static 0. N = normal force between the surfaces (N, lb) Friction coefficient curve is of sinusoid shape, whereat the opposite directions are marked with + and - sign, denoting coefficient of friction in two different directions of sample moving. It was found that physical properties increased rapidly as lower molecular weight values increased and then leveled off at this value. 2. 6 mm diametre) surface with the aim of providing wear resistant coating on this soft and tribologically poor metal. 6 g and 3. 09 and also showed an excellent wear life of 250,000 cycles at a load of 7 N and a speed of 0. DuraSurf™ STS is an ideal solution for many applications in the package handling industry: chute linings, slider beds, slides, spirals and numerous other areas where packages can get lodged or damaged. UHMW Reprocessed is also self-lubricating with an extremely low coefficient of friction. The initial friction coefficient of α-T/UHMWPE-F was the highest in all the α-tocopherol stabilized UHMWPE specimens, which is due to the scratches and furrows on the surface of α-T/UHMWPE-F after the effect of force and degradation, and the surface was very coarse (Fig. To further strengthen these properties, different types of micro/nanofillers such as carbon nanotubes, nanoclay,. UHMW (excluding reprocessed UHMW) has been approved by the Food and Drug. Concrete (Wet) Rubber. Can someone tell me the coefficient of friction between abs and delrin? I want something low. 1. The coefficient of friction of aged UHMWPE specimens for different aging periods is shown in Figure 4. The coefficient of friction is not a function of mass or volume. O. 87 and 0. Although, reliable sources (mentioned at the reference section) has been used for compiling the above COF table but still the values shown are approximate only. Furthermore, TIVAR 88-2 UHMW-PE liners are available. Higher wear resistant then Delrin and about the same coefficient of friction as Teflon. 1. Ultra High Molecular Weight polyethylene (UHMW-PE) is an engineering thermoplastic with a molecular weight of greater than 3. 8. 5 mil industrial grade film tape that provides an abrasion resistant surface with a low coefficient of friction. There are so many differences between products that they are best described in the list. The coefficient of friction is a term that measures the ratio of the force of friction when two surfaces interact with a numerical value. 07-0. Its coefficient of friction is comparable to that of PTFE (Polytetrafluoroethylene) but it has. 10 -1. Dynamic friction coefficient curves exhibited HDPE vs UHMW Friction. Not only does Ultra High Molecular Weight not wear down and decompose (like metals), it has the lowest coefficient of friction for plastic. The thickness of our UHMW-PE sliding fenders is usually 2 mm to 400 mm, and the size ranges from 1,000 x 1,000 mm to 2000 mm x 6000 mm. First, the bulk material is biocompatible. UHMW (ultra-high molecular weight polyethylene) has extremely high abrasion resistance, even exceeding that of steel. 03. 05 N/mm2, v= 0. However, contact zone was obviously different with a friction coefficient ratio of 1 comparing to that with a friction of coefficient ratio of 1. 8 g. In addition to enhancing the wear resistance of the material, the incorporated and evenly dispersed oil gives this material a considerably lower coefficient of friction than standard UHMW-PE products. By means of systematic studies, correlations between friction temperature, coefficient of friction, wear and process parameters are examined. 25 Wear Resistance Sand Slurry - 130 . 20 . Concrete (Wet) Rubber. UHMW is an odorless, tasteless, and non-toxic material. The mean coefficient of friction of the UHMWPE-on-PEEK and UHMWPE-on-cobalt chrome bearing couples with respect to increasing protein concentration is shown in Fig. The friction coefficients of UHMWPE/PMF-2. Outstanding impact strength, even at low temperatures. 4–0. Ultra-High molecular weight polyethylene (UHMW-PE) coatings have been gaining ground in various tribological applications because of their ease of deposition, outstanding wear resistance and low coefficient of friction. This characteristic was also found in total hip replacement by Wang et al. UHMW and Delrin are both thermoplastic materials with high strength and low friction properties. Redco™. The material must be slippery (coefficient of friction) 5. Static and dynamic coecients of friction are signicantly lower than steel and most plastic materials (Table 1). 64 – $ 5,251. UHMW's low coefficient of friction enhances efficiency and productivity in automotive, railroad, medical, printing and packaging industries as well as for material handling and food processing applications. Table features and directions: View plastic materials found under a specific property group: Click on the tab of a specific property group. While it remains true that the coefficient of friction between PTFE. UHMW (excluding reprocessed UHMW) has been approved by the Food and Drug. 5 wt. However, the material also needs to have a silicone free. The average friction coefficient of the untreated skis of 0. 44 0. P PBT UHMW PTFE ABS PC PPO PSU PEI PEEK PPS PAI PI HDPE PP PVC Coefficient of Friction (Lower has less friction) 0 2 4 6 8 10 12 14 16 PA 6/6 PA 6 POM H ‐ C PET ‐ P PBT UHMW PTFE ABS PC PPO PSU PEI PEEK PPS PAI PI HDPE PP PVC Impact Strength (Ft. FMorin (Mechanical) (OP) 12 Feb 05 13:57. 61-Brake (Composite) Cast Iron. TIVAR® Oil-Filled UHMW-PE is an ultra high molecular weight polyethylene material that truly lives up to the self-lubricating description. It is odorless, tasteless, and nontoxic. 0. Call Us: +86-23-67148190 | [email protected] of Different Sterilization of UHMWPE on its Wear Rate • Pin-on-disk experiment • UHMWPE on Co-Cr femoral heads, 22 mm diameter • Roughness: ball = 0. 121 and 0. (SCF) improved the wear resistance and also reduced the coefficient of friction up to an optimum concentration of 20 vol. More economical that PTFE tapes. 30 Dynamic 0. InTIVAR® 88 is a low coefficient of friction UHMW-PE plastic that offers superior release and non-stick performance properties over traditional UHMW-PE materials. It is odorless, tasteless, and nontoxic. Research Acetal material properties, uses and specs at Curbell Plastics, get a quote, or ask a plastics expert. What are the different grades of UHMW plastic? UHMW plastics come in various grades, each designed for specific applications with varying properties. This paper studies the effect of contact stress on friction and wear of ultra-high molecular weight polyethylene (UHMWPE) acetabular cups by means of friction and wear joint simulator testing. 5 µm • Test condition: – 1x106 cycles, 15 cm/s, Max Hertzian pressure = 12. 15 - . (c) Friction coefficient of UHMWPE-SiO 2 coated PPTA fiber as a function of initial indentation depth ranging from 300 nm to 1500 nm. UHMWPE. 11 to 0. Compare plastic materials: Select two or more materials and then click "Compare. Reduces coefficient of friction in finished components by up to 80%. Wear coefficient of UHMWPE as function of pv for friction pairs with steels of different grades: 45 steel (⚪); 18X2H4MA steel. Coefficient of friction against hardened and ground steel P= 0. will deliver for you. UHMW is chemically inert, absorbs virtually no moisture, and can be machined very easily. 1 Coefficient of Friction. In addition, it is abrasion, impact, and corrosion resistant and is self-lubricating. 4 The Test Duration 5. GAR-DUR® UHMW plasticwasassignedan abrasionratingof10; results for the other materials tested are shown in relation to thisbaseline. This tape line is designed for mechanical applications where high abrasion resistance and a low coefficient of friction is required. 5. TIVAR® 88 has a lower coefficient. 6 0. 2 and 3. Recommend testing. 30: Aluminum-Bronze Alloy : Steel. The friction in a spherical plain bearing or rod end depends primarily on the sliding contact surface combination, the load and the sliding velocity. The coefficient of friction (CoF) is a measurement of the resistance generated when sliding the surface of one material over another. UHMW-PE based products offer a host of exceptional attributes that include high abrasion resistance, low coefficient of friction and one of the highest impact strength ratings of any thermoplastic. It was shown that the PEEK (pin)-on-UHMWPE (disk) tribological pair is well compatible, characterized by a low coefficient of friction (f = 0. UHMW’s host of exceptional attributes such as high abrasion resistance, low coefficient of friction and unparalleled impact resistance, even in cryogenic environments, make it a favorite. 75. Easily. 77*10 ⁻⁶ mm ³ /Nm and the coefficient of friction (COF) to 0. 76 3 Wet Rubber 38. UHMW, also known as UHMW-PE (Ultra High Molecular Weight Polyethylene), is a semi-crystalline thermoplastic material, with a continuous use temperature range of up to 180° F (82° C). 8 0. Polyethylene PE500-1000 (UHMWPE) Sheet to solve friction, wear and material flow problems in many areas of industry. Request a Quote. UHMW. 2 (b) demonstrated that the friction coefficient of aged UHMWPE varied from 0. 14 : Sand Wheel Wear/Abrasion Test: 95: UHMW=100: Coefficient of Linear Thermal Expansion: 11. UHMW PE is processed by compression molding or ram extrusion into sheets, plates or rods. The Food and Drug Administration has approved natural virgin UHMW for use in the food. . Under water sliding condition, the friction coefficient of the UHMWPE composite decreased significantly. Applied normal loads were 203 N; *applied normal load was 122 N. Superior sliding performance and high limiting pressure velocity. It has extremely low moisture absorption and a very low coefficient of friction. 2The friction and wear behavior of ultra-high molecular weight polyethylene (UHMWPE) sliding against GCr15 steel and electroless Ni-P alloy coating under the lubrication of seawater was investigated and compared with that under dry sliding and lubrication of pure water and 3. Why industrial engineers prefer Polystone ® M: • low coefficient of friction • excellent abrasion. The low friction coefficient and high abrasion resistance of UHMW-PE provides an ultra smooth surface for the vessel to slide easily along the face of the fenders. UHMW Mechanical Properties Comparison of dynamic coefficient of friction on polished steel PROPERTYThere are a few standout tests that have lower friction coefficients and seem to increase with pressure (the off-axis cases involving a short 45°- bottom uncoated strip on a 45° or. PTFE is more slippery than UHMW (despite both having a low coefficient of friction) UHMW has far better wear properties than PTFE. Coefficient of friction against hardened and ground steel P= 0. 6m/s 0. In all test groups, the friction coefficient of TPU with 60 and 70 A hardness was relatively stable. This Ultra High Molecular Weight (UHMW) Polyethylene will outwear all other materials, including metals, nylons, urethanes, and fluoroplastics. The weight loss of CNT-reinforced UHMWP was found to decrease with the increasing amount of. For smooth steel and PE, the dynamic COF is below 0. Testsamples arespunforatotalof7 hoursat1,750rpmina water-sandmixture. 2 to 1. 76 0. Other properties that make UHMW attractive is its. More economical that PTFE tapes. This property allows it to be used as containers and pipelines for reactive chemicals. 3 Measurement of the Surface Temperature 5. According to research, the co-efficient of dynamic friction of ultra high density polyethylene under dry conditions is around 0. Acetal (brand name Delrin) does pretty good In all these categories. Test prove that NanoSlick Lubricants are able to achieve an amazing 0. Coefficient of Friction 73°F on Steel--static 0. While polytetrafluoroethylene (PTFE, Teflon) is normally regarded as having a lower coefficient of friction versus UHMW, IPX UHMW has a comparable coefficient at . Redco™ DEADPLATE Absorbs energy to eliminate bounce back and vibration. Virgin UHMW sheets have very low moisture-absorbing characteristics. Friction coefficient was mostly influenced by axial load; its increase led to a decrease in friction. 9% lower than that of TPU with 60 A. UHMW PE, LubX® C. 45 – 0. The curves of the composite motion and the swing friction coefficient have the characteristics of going up first and dropping after and finally stabilizing. 5 10-4: UHMW Electrical Properties. Search Search. 1. Min Order: 1000 kilograms. HighLine is now able to offer a line of white color UHMW-PE sheets with ESD (ElectroStatic Discharge) properties. The coefficient of friction of UHMWPE primarily depends on surface texture of harder material surfaces. Exceptionally high abrasion & impact. 12 to 0. Thanks. 32 to ∼0. 2 (but can vary with surface finish and speed). 6 – 0. Stellit balls or ZrO2 balls Figures - available via license: Creative Commons Attribution 3. Table 1. 10-. 85. For pipe sizes of 1. UHMW: Cost. 08 – 0. Coefficient of linear thermal expansion (-40 to 150 °C) (-40 to 300°F) ASTM E-831 (TMA). Aug 19, 2022; Replies 9 Views 693. PTFE can only handle about 1/5 the load of UHMW. 42, respectively, which were all lower than that of UHMWPE. The magnitude of the frictional force has two forms: one for static situations (static friction), the other for when there is motion (kinetic friction). 2302 uhmw tape low coefficient of friction, Saint-Gobain CHR 2302 UHMW Tape Properties, polyolefin film coated with acrylic adhesive UHMW Tape, uhmw tape for chutes and conveyors, uhmw tape for guide rails to reduce. The extraordinary durability and versatility of UHMW-PE is used by designers and engineers in many industries worldwide. The following table gives an indication of the abrasion resistance of Redco™ UHMW polymer. Product Information. Therefore, it is certain that UHMWPE is a good engineering. PTFE and PE Wax show a low initial coefficient which quickly increases. The friction coefficient for double Fermat's spiral is noticeably lower than the others. They have values of friction coefficient for HDPE and UHMWPE . 12Acetal plastic has a low coefficient of friction, high strength and excellent wear properties. Surface Condition Force Applied Coefficient of Friction 1 Wet Rubber 37. Considering the porosity, mechanical properties, and friction coefficient, the optimal process parameters of the UHMWPE porous material were as follows: The sintering temperature was 180 °C or 190 °C, and the charging amount was between 3. Very Good abrasion and wear resistance. UHMW PE, Static Control. All of these grades hold many different properties which make PE a highly sought after material for a variety of applications. The low friction coefficient and high abrasion resistance of UHMW-PE provide an ultra-smooth surface for the vessel to berth easily along. The total wear volume of TPU with 70 A hardness was 45. High impact resistance. UHMW is unbreakable even at extremely low temperatures, and is FDA and USDA compliant. While it remains true that the coefficient of friction between PTFE and polished stainless steel is the lowest between two known solids (0. This self-lubricating polymer has excellent chemical resistance and a broad temperature. Friction coefficients in dry sliding as a function of wear track position for one cycle of the chirp, double Fermat's spiral, and the Archimedes spiral. Select options; Tivar® H. LubX® C is known for its high impact strength and is also light in weight, resistant to staining, and has a low moisture absorption rate. 30-. 20 . The coefficients of friction of UHMWPE against Si 3 N 4 ball in eight-figure sliding track under plasma lubrication locate at the range of 0. N = normal force exerted on the body by the plane due to the force of gravity i. Thermal Expansion Coefficient: 2. Coefficient of Friction, Plastics to Steel Static 0. 75-. Its biological stability, high rates of strength, wear, and creep resistance, and low friction coefficient all contribute to it being used [ 116 ]. 13 to ∼0. The fracture toughness, low friction coefficient, high impact strength, and low density of UHMWPE have made it a popular choice as the articulating surfaces of joint replacements, such as hip, knee, ankle, and shoulder. The table below shows an average static Coeffcient of Friction for most material on material, with and without lubrication. Blanchet et al. UHMW-PE with low coefficient of friction and electrical conductivity. 3 is it clear that for pv ≈ 0. The mean coefficient of friction of the UHMWPE-on-PEEK and UHMWPE-on-cobalt chrome bearing couples with respect to increasing protein concentration is shown in Fig. 15 - 0. The coefficient of friction (COF) was increased up to 65. More than 20 vol. It has a slightly higher coefficient of friction than Teflon. 29 - - Ball indentation hardness 35 MPa 2039 -1 Shore hardness D 64 - 868 Thermal Properties Value Unit DIN/EN/ISO. Recommend testing. There are so many differences between the products that a list is the best way to explain: PTFE is substantially much more expensive than UHMW. Full Sheet: 48"x120" (. mg cos θ. from publication: DETC2009-86365 Numerical Investigations of Mechanical Responses,. T. 4 MPa m/s and pv ≈ 1. 25 : 0. 07, 0. 17 : Coefficient of Friction (Dry vs Steel) Dynamic. It is one of the most wear-resistant plastics, and has toughness and impact resistance even at low temperatures. e. [35]. Date：2021-01-11. Some nylons can be a real bitch to machine and Nylatron can be a little brittle so be careful not to machine too aggressively in the wrong spots. 010 and 0. 4, which was. Friction coefficients increase as amplitude of angles increase. 4. 1. UHMW possesses a unique combination of physical and mechanical properties which enable it to perform well under the most rigorous conditions. 13 to ∼0. 1–1 N) and three values of sliding speed (4 - 12 mm/s). Protect small parts with these slippery UHMW rings, discs, and squares. From Fig. Dynamic Coefficient of Friction (-) ISO 7148-2 (18) 0. and stand pipes. [10] studied the effect of surface texturing of UHMWPE, acting as a bearing material lubricated with distilled water, on the coefficient of friction, µ, under high applied loads, L, and low sliding-rolling ratios, SRR; however, such conditions, did not correspond to those of the walking cycle for a commercial model of knee prosthesis. After the steady state of friction, the friction coefficient in dry sliding is the highest, that. 21 0. 05 to 0. 125 Uhmw Black Round Uhmw Strip Uhmw 1/2 Uhmw Plastic Polyethylene Sheet Uhmw Black Uhmw Polyethylene Uhmw Tube Uhmw 48. Lowest Friction Available.