Types Of Plastic

GCSE DT revision

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  • Created by: ellie
  • Created on: 02-05-12 09:56

Thermoplastics

Can be moulded by heating and can be

 re-molded if heated again

(http://www.whatisplastic.com/wp-content/uploads/thermoplastic-process-300x225.jpg)

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Acetate (Cellulose acetate)

  • Flexible, hard, shiny and transparent/translucent
  • Thin sheets for overhead projectors and for packaging where the product must be seen
  • Easy to print on
  • Made mostly from wood= more sustainable

(http://www.hostgator.co.in/files/writeable/uploads/hostgator20719/image/frontpage.jpg)

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Polypropylene

  • Tough, strong and flexible
  • Can be made with a 'living hinge' (therefore all one piece)
  • Lunch boxes, chairs, textiles and car parts

(http://duraweld.co.za/images/picture%20gallery/polypropylene/picspolyprop.gif)

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High Impact Polystyrene

  • rigid, varied colours and thicknesses
  • boxes for products
  • vacuum forming
  • fairly cheap

(http://www.linpac.com/Global/Press%20releases/Tomato-tray-900px.jpg)

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Polyvinyl Chloride (PVC)

  • Cheap and durable
  • easy to print on
  • quite brittle
  • Used for blister packaging (pills)
  • vinyl records, insulation, or electrical wires etc.

(http://www.best-b2b.com/userimg/545/588-1/pvc-insulation-tape-548.jpg)

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Plastics For Modelling Materials

These next few plastics are not very strong but are easy to cut and shape. That makes them good modelling materials- to see ideas in 3d.

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Corrugated Plastic Sheet

  • Lightweight, rigid and weather proof
  • Made from polypropylene
  • stiff but can be bent in to shapes- good for flat surfaces & square edges
  • estate agent signs or student folders for example.

(http://www.tts-group.co.uk/_rmvirtual/media/tts/images/legacy/TCORR-3.jpg)

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Expanded Polystyrene foam (STYROFOAM)

  • Lightweight
  • Can be shaped with a knife
  • Can be quite crumbly
  • Dense structure (styrofoam)
  • Good for models but need to be filled in order to paint.

(http://wccny.org/wp-content/uploads/2011/03/styrofoam1.jpg)

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Machining Foam

  • more compact than expanded polystyrene- can be worked on using machine tools
  • Make detailed pieces which can be painted
  • Used for architectual models
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Acrylic

  • Stiff and brittle
  • Used to make signs and small 2D and 3D forms

(http://image.made-in-china.com/2f0j00LBMEtcIshdba/Acrylic-Color-Box.jpg)

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Cellophane

  • Tough, hard, stiff
  • lightweight
  • transparent
  • Non-flammable
  • Wrapping around products=protection

(http://www.eatyourdessertfirst.com/i/Cello/cello_bags_candy_cookie.jpg)

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Polythene

  • Hard, stiff
  • able to be sterilised
  • used for bottles and shrink wrapping

(http://www.justhygiene.co.uk/system/cache/polythene-gloves_cms_site_products_images_231-1-570_500_500_False.jpg)

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Acrylonitrile butadiene styrene (ABS)

  • Strong, hard, lightweight and durable
  • Good finish
  • resistant to chemicals
  • makes tubes and structures. Also can be corrugated.

(http://inipunyaku.do.am/ABS.jpg)

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Comments

Kate Westall

This is really helpful. Thank you :)

SwallowTailsBiggestFan

dONT LIE KATE

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