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| THERMOPLASTICS
(continued)
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| Previous Thermoplastics | Thermosets |
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| Styrene Acrylonitrile (SAN) & Acrylonitrile Styrene Acrylate (ASA) |
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| Properties: |
Rigid, transparent, tough, resistant to grease, stress cracking and crazing, easily processed, resistant to food stains. |
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| Applications: |
Drinking tumblers, hi-fi covers, lenses, water jugs and toothbrush handles, kitchen and picnic ware, radio dials, TV set screens, washing machine trims. |
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Ethylene Vinyl Acetate (EVA) |
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| Properties: |
Flexible (rubbery), transparent, good low temperature flexibility (-70'C), good chemical resistance, high friction coefficient. |
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| Applications: |
Teats, handle grips, flexible tubing, record turntable mats, beer tubing, vacuum, cleaner hosing. |
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Fluoroplastics (PTFE – FEP) |
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| Properties: |
Semi-rigid, translucent, exceptional low frictioin characteristics, superior chemical resistance, impervious to fungi or bacteria, high temperature stablilty (260'C), low temperature toughness (-160'C), good weathering resistance and electrical properties. |
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| Applications: |
Non-stick coating, gaskets, packings, bearings, high and low temperature electrical and medical applications, laboratory equipment, pump parts, thread seal tape. |
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Polyacetals (POM) |
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| Properties: |
Rigid, translucent, tough, spring-like qualities, good stress relaxation resistance, good wear and electrical properties, resistant to creep and organic solvents. |
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| Applications: |
Business m/c parts, small pressure vessels, aerosol valves, coil formers, clock and watch parts, nuclear engineering components, plumbing systems, shoe components. |
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Polyethylene (High Density - HDPE) |
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| Properties: |
Flexible, translucent / waxy, weatherproof, good low temperature toughness (to -60'C), easy to process by most methods, low cost, good chemical resistance. |
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| Applications: |
Chemical drums, jerricans, carboys, toys, picnic ware, household and kitchenware, cable insulation, carrier bags, food wrapping material. |
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Polyethylene (Low Density LDPE, LLDPE) |
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| Properties: |
Semi-rigid, translucent, very tough, weatherproof, good chemical resistance, low water absorption, easily processed by most methods, low cost. |
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| Applications: |
Squeeze bottles, toys, carrier bags, high frequency insulation, chemical tank linings, heavy-duty sacks, general packaging, gas and water pipes. |
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Polymeth-ylpentene (PMP)
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| Properties: |
Rigid, tough, lightweight (density 0.83 gm/cm), chemical resistant, additives are required for outdoor use, highly permeable to gases, transparent crystalline material. |
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| Applications: |
Medical ware, syringes, lamp covers, (good heat resistance), radar applications, encapsulation, microwave food packaging. |
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Poly-phenylene Oxide (PPO)
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| Properties: |
Rigid, opaque, good dimensional stability at high temperature and humidity conditions, difficult to process (blended to ease injection moulding), tough. |
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| Applications: |
Coffee pot and washing m/c parts (where high temperature and moisture are critical), replacement for die castings, drink vending machines, microwave components. |
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Polystyrene (General Purpose - GPPS)
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| Properties: |
Brittle, rigid, transparent, low shrinkage, low cost, excellent X-ray resistance, free from odour and taste, easy to process
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| Applications: |
Toys and novelties, rigid packaging, refrigerator trays and boxes, cosmetic packs and costume jewellery , lighting diffusers, audiocassette and CD cases. |
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Polystyrene (High Impact - HIPS) |
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| Properties: |
Hard, rigid, translucent, impact strength up to 7 x GPPS, other properties similar. |
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| Applications: |
Yoghurt pots, refrigerator linings, vending cups, bathroom cabinets, toilet seats and tanks, closures, instrument control knobs. |
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