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Discover the diverse world of plastics, including thermosetting and thermoplastic varieties. Explore main types like Acetate, Polypropylene, HIPS, and PVC, each with unique characteristics and uses. Delve into modelling plastics like corrugated sheet, Styrofoam, and machining foam for creative projects.
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There are two main types of plastic... • Thermosetting Plastics • Thermoplastics
Thermoplastics • Thermoplastics – • Can be moulded into shape • Can be re-moulded if you heat them again. • There are four main types: • Acetate • Polypropylene • High Impact Polystyrene (HIPS) • Polyvinyl Chloride (PVC)
Acetate – • Flexible • Hard • Shiny • transparent or translucent. • It is easy to print on. I – See - Tate Used for packaging where the product needs to be seen
Polypropylene – • Strong • Tough • Flexible • Can be made with a ‘living hinge’. Proper – Strong – Plastic Used to make Tupperware, lunch boxes, Used to make chairs
Polyvinyl Chloride (PVC) – • Cheap • durable, but quite brittle • It easy to print on Cat Women - blisters on her feet She’s electric Used for Blister packs Used for insulation for electrical wiring
High Impact Polystyrene (HIPS) • Rigid • Comes in variety of colours Comes in variety of thicknesses Shake your HIPS when you vacuum Used for making boxes for products Used for vacuum forming
Other types of plastic... • Acrylic – • Door signs, • Shop signs • Key rings
Plastic can also be used for modelling... • There are three main types of modelling plastic • Corrugated plastic sheet • Styrofoam • Machining foam
Corrugated plastic sheet – • Lightweight • Rigid • Weather proof • can be bent into shapes Good for modelling objects with large flat areas. Used to make outdoor signage – estate agent signs • Styrofoam – • Light weight • Dense / Solid Very good for making 3D models
Machining foam – • More compact than Styrofoam. More dense / solid. • Can work on it with machine tools without it crumbling. • Can make detailed pieces that can be painted.