HMWPE & UHMWPE are a range of High Density Polyethylene’s with a very high level of polymerisation.
As the molecular weight of polyethylene increases, higher values are obtained for a number of technically important properties:
- WEAR RESISTANCE
- NOTCHED IMPACT STRENGTH
- STRESS CRACKING RESISTANCE
- HEAT DISTORTION RESISTANCE
- ENERGY ABSORPTION CAPACITY AT HIGHER STRESS RATES
- ULTIMATE TENSILE STRENGTH AT ELEVATED TEMPERATURES
This combination of technical properties clarifies the PTP range as ENGINEERING PLASTICS.
THE RANGE
PTP1000A NATURAL – Virgin Grade Ultra High Molecular Weight Polyethylene with a molecular weight of approx. 4.5 million. Manufactured from top quality materials without any additives. Gives optimum properties. Meets all food hygiene requirements.
PTP1000T BLACK / GREEN – A blend of virgin and regenerated Ultra High Molecular Weight Polyethylene with a molecular weight of approx. 4.5 million. Processed using selected fine milled regenerated materials. Offers excellent mechanical properties including high abrasion resistance and very low coefficient of friction at a lower cost than virgin grades. Slightly reduced impact strengths. Used extensively in the Mechanical Engineering, Bottling, Canning and Conveying Industries.
PTP1000DF BLACK – Regenerated Ultra High Molecular Weight Polyethylene with a molecular weight of approx. 4.5 million. Processed using regenerated materials. Contains Ultra Violet stabilisers for outdoor use. Developed for use as dock fendering. Good impact strength and low coefficient of friction. Unaffected by sea water and low temperatures.
PTP8000S YELLOW – Virgin Grade Ultra High Molecular Weight Polyethylene with a molecular weight of approx. 7.5 million with the addition of special additives to further reduce the coefficient of friction. Increased abrasion resistance offers up to 25% increase in life over conventional virgin grades. The new generation of Engineering Materials.
PTP8000G GREEN – Glass Filled Virgin Grade Ultra High Molecular Weight Polyethylene with a molecular weight of approx. 6 million. The addition of glass powder greatly increases the wear resistance and reduces the coefficient of friction. Used where conventional UHMWPE is prone to failure due to abrasive wear.
PTP500A NATURAL / COLOURS – Virgin Grade Ultra High Molecular Weight Polyethylene with a molecular weight of approx. 500,000. Used in the Food industry. Meets all food hygiene requirements. Coloured boards are used to avoid cross contamination of foods.
APPLICATIONS
CHEMICAL INDUSTRY
REASONS: Excellent Chemical Resistance and Toughness, Machinability.
APPLICATIONS: Pump Housings, Seals, Gaskets, Stopcocks, Valves, Electroplating Barrels, Filter Press Plates.
PAPER INDUSTRY
REASONS: Low Coefficient of Friction, High Wear Resistance.
APPLICATIONS: Suction Box Covers and Bars, Foils, Guide Blades, Slide Deckles, Rollers.
MINING INDUSTRY
REASONS: Good Impact Strength, High Wear Resistance and Low Friction Properties.
APPLICATIONS: Linings for Bunkers, Chutes and Railway Wagons, Conveyor Rollers, Scraper Blades, Impact Bars.
BREWERY, BOTTLING AND CANNING
REASONS: High Wear Resistance, Low Friction, Good Impact Strengths, Food Approved.
APPLICATIONS: Wear Strips, Chain Guides, Starwheels, Can Guides, Chain Tensioners, Dead Plates, Feed worms, Bearings, Rollers.
TEXTILE INDUSTRY
REASONS: High Impact Strengths, Excellent Wear Resistance.
APPLICATIONS: Loom Pickers, Lug Straps, Picker Sticks, Buffers, Rollers.
FILTRATION INDUSTRY
REASONS: Excellent Chemical Resistance, Low Friction, High Wear Resistance.
APPLICATIONS: Filter Plates, Vacuum Seal Strips, Support Rollers, Belt Slide Plates, Cloth Guides, Belt Guide Rollers, Belt and Cloth Tensioners.
PORT, DOCK INSTALLATIONS, SHIP BUILDING
REASONS: Good Impact Strengths, Low Friction, UV. Resistance.
APPLICATIONS: Dock Fenders, Buffer Strips, Cable Guides, Weir Plates, Lock Gates.
FOOD AND PREPARATION
REASONS: F.D.A. Approval, Non – Stick, Good Impact Strengths.
APPLICATIONS: Food Preparation Tables, Cutting Boards, Stirring Paddles, Mincer Rammers, Rolling Pins, Knife Holders, Butchers Blocks.
LEISURE AND SPORTS INDUSTRIES
REASONS: Good Impact Strengths, High Wear Resistance, Low Friction, Colour Availability.
APPLICATIONS: Ice Skating Surfaces, Kick boards and Handrails, Swimming Pool Channel Grating, Benches, Playpens.
ABRASION RESISTANCE CHART
| MATERIAL | DENSITY g/cm3 | RELATIVE ABRASION |
|---|---|---|
| PTP2000GV | 0.96 | 78 |
| PTP2000S | 0.93 | 80 |
| PTP1000A | 0.94 | 100 |
| PTP1000T/DF | 0.94 | 110 |
| NYLON 6 | 1.14 | 150 |
| NYLON 6.6 | 1.13 | 160 |
| CARBON STEEL | 7.45 | 160 |
| PTP500A | 0.95 | 250 |
| STAINLESS STEEL | 7.85 | 550 |
| L.D.P.E. | 0.92 | 600 |
| POLYPROPYLENE | 0.89 | 600 |
| ACETAL CO – POL | 1.42 | 700 |
| P.V.C. | 1.33 | 820 |
| PERSPEX | 1.31 | 1800 |
| BEECHWOOD | 0.83 | 2700 |
The values were obtained by the sand / water slurry test.
The higher the figure the greater the abrasive wear.
PTP1000A was set at 100 for comparison purposes.
