Term
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Definition
| Naturally opaque/white and very tough Gears, bearings, taps & aerosol valves |
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Term
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Definition
| Transparent, brittle Lenses, car light housings and reflectors |
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Term
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Definition
| Natural, opaque and very tough Telephone handsets, vacuum cleaner housings |
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Term
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Definition
| Almost opaque or white and very tough Bushes, bearings, curtain runners |
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Term
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Definition
| Transparent, very tough Safety shields and helmets. Car headlights, DVD |
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Term
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Definition
| Natural waxy appearance, flexible Kitchenware, sealing lids & closures |
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Term
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Definition
| Natural waxy appearance, tough & stiff Milk crates |
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Term
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Definition
| Natural waxy appearance, tough & stiff Beer crates, automotive battery housings |
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Term
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Definition
| Transparent & brittle CD Jewel cases |
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Term
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Definition
| Natural translucent & tough Toys |
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Term
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Definition
| Transparent to opaque, tough & rigid Window frames, plumbing fittings |
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Term
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Definition
| Transparent to opaque, tough & flexible Shoe soles, inflatables |
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Term
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Definition
| Transparent & brittle Kitchenware, instrument housings |
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Term
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Definition
Vectra: glass filled, liquid crystal polymer with low shrinkage and warp as well as fast cycle times; a good material for small thin walled parts such as connectors and high temperature assembly applications
Valox: a PBT with low shrinkage, but slightly higher than vectra; a good material for small parts such as connectors and low temperature assembly applications
Questra: a blend of polystyrene and nylon with similar shrinkage as valox; used for valve covers, electronic housings, and automotive connectors |
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Term
| Give two examples of materials that must be dried before use and explain what could happen if not fully dried |
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Definition
Any two materials from the following:
Nylon, Polycarbonate, ABS, Acrylic, PBT, PET, PPO
Any two effects from the following:
Froth/bubbling, poor surface finish, Material degradation, strength of molding reduced |
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