1.6 Flashcards
Polymers (thermoforming):
What are the properties of ‘Acrylic’? (PMMA)
Hard
Excellent optical qualities
Good resistance to weathering
Scratches easily
Brittle if thin
Polymers (thermoforming):
What are common uses of ‘Acrylic’? (PMMA)
Spun into threads and woven - to mimic wool
Car lights
Polymers (thermoforming):
What are the properties of ‘High Impact Polystyrene’? (HIPS)
Shatterproof
Good insulator
Flexible
Easily mouldable
Lightweight
Good gloss finnish
Impact resistant
Polymers (thermoforming):
What are the common uses of ‘High Impact Polystyrene’? (HIPS)
Children’s toys
Yoghurt pots
Refrigerator liners
Polymers (thermoforming):
What are the properties of ‘Hight Density Polyehelene’? (HDPE)
Hard and Stiff
Excelent chemical/cracking and rip resistance
Lightweight
Stiff
Polymers (thermoforming):
What are the common uses of ‘Hight Density Polyehelene’? (HDPE)
Bins
Polymers (thermoforming):
What are the properties of ‘Polyppropylene’? (PP)
Versatike
Low density
Ductile
Chemically resistant
Easily cleaned
Polymers (thermoforming):
What are the common uses of ‘Polyppropylene’? (PP)
Toys
DVD and blu-ray cases
Food
Packing film
Bottle caps
Medical equipment
Polymers (thermoforming):
What are the properties of ‘Polyvinyl Chloride’? (PVC)
Hard and tough
Good chemical and weather resistant
Low cost
Can be rigid or flexible
Easily extruded
Polymers (thermoforming):
What are the common uses of ‘Polyvinyl Chloride’? (PVC)
Packing
Pipes
Outwear
Electrical tapes
Children’s toys
Polymers (thermoforming):
What are the properties of ‘Polyethylene Terephthalate’? (PET)
Lightweight
Chemically resistant
Stable
Easily blow moulded
Recyclable
Polymers (thermoforming):
What are the common uses of ‘Polyethylene Terephthalate’? (PET)
Drinks bottles
Food packaging
(single use plastics)
General properties of ‘Thermoforming Polymers’
Good surface finnish
Can be repeatedly heated and moulded
Recyclable
Not suitable for use in areas of heat/UV sensitivity
Polymers (thermosetting):
What are the properties of ‘Epoxy Resin’?
(Supplied as 2 liquids - a resin and a hardner which acts as a catalyst to set the resin)
Good strength to weight ratio
Adheres well to fibreglass and carbon fibre (to reinforce it)
Incredibly strong adhesive
Toxic fumes
Polymers (thermosetting):
What are the common uses of ‘Epoxy Resin’?
As adhesives
Polymers (thermosetting):
What are the properties of ‘Polyester Resin’?
(Viscose, pale polyester solution)
Stiff, hard and strong
Excelent resistance to heat, scratching and staining
High abrasion resistance
Can be casted and painted
Polymers (thermosetting):
What are the common uses of ‘Polyester Resin’?
Flooring
Object embedding
Clear sculpture casting
Jewellery making
Resin replicas (anatomical models)
Polymers (thermosetting):
What are the properties of ‘Phenol Formaldehyde’?
Very rigid and hard
Polymers (thermosetting):
What are the common uses of ‘Phenol Formaldehyde’?
Electrical components
Household items (radios/clocks)
Polymers (thermosetting):
What are the properties of ‘Melamine Formaldehyde’?
Brittle but becomes tough when laminated with glass fibre
Hard and rigid
Resistant to UV
Heavy
Heat and chemical resistant
Prone to chipping
Polymers (thermosetting):
What are the common uses of ‘Melamine Formaldehyde’?
Picnic wear = lots of differnt colours
A laminate for kitchen surfaces
Polymers (thermosetting):
What are the properties of ‘Urea Formaldehyde’?
Hard and rigid
Good electrical insulator
Heat resistant
Polymers (thermosetting):
What are the common uses of ‘Urea Formaldehyde’?
Plug sockets and plufgs
Treating fabric - anti-wrinckling (crease resistance)
Binding to MDF boards
General properties of ‘Thermosetting Polymers’
Cannot be reformed/remoulded once set into shape
Can withstand high temperatures
Waterproof when solid - ideal for adhesives
Non-recyclable
Good electrical insulators
Papers and Boards:
What are the properties of ‘Tracing paper’?
Thin
Transparent
Papers and Boards:
What is ‘Tracing paper’ used for?
Used for tracing images
Papers and Boards:
What are the properties of ‘Bleedproof paper’?
Smooth
Prevents markers from bleeding
Papers and Boards:
What is ‘Bleedproof paper’ used for?
Used with marker pens
Papers and Boards:
What are the properties of ‘Grid paper’?
White paper printed with grid lines e.g. isometric
Papers and Boards:
What is ‘Grid paper’ used for?
Ued for accurate drawings
Papers and Boards:
What are the properties of ‘Cartridge paper’?
Good quality thick white paper
Often has a slight texture
Papers and Boards:
What is ‘Cartridge paper’ used for?
Used for drawing
Papers and Boards:
What are the properties of ‘Layout paper’?
Translucent
Lightweight
Smooth finnish
Papers and Boards:
What is ‘Layout paper’ used for?
Used for sketching
Papers and Boards:
What are the properties of ‘Duplex card’?
Thin
One layer suitable for printing
Papers and Boards:
What is ‘Duplex card’ used for?
Breakfast cereal boxes
Papers and Boards:
What are the properties of ‘Corrugated card’?
Strong
Lightweight
2+ layers with fluted middle
Good insuators
Papers and Boards:
What is ‘Corrugated card’ used for?
Takeawat boxes
Papers and Boards:
What are the properties of ‘Foam core board’?
Two peices of board with a foam core
Thick but very light
Smooth surface
Papers and Boards:
What is ‘Foam core board’ used for?
Used for displays
Papers and Boards:
What are the properties of ‘Foil lined board’?
Board laminated on inside with aluminium foil
Good insulators
Stiff
Papers and Boards:
What is ‘Foil lined board’ used for?
Takeaway hot food container
Papers and Boards:
What are the properties of ‘Ink jet card’?
Brilliant white trated card to create a smooth finnish
Papers and Boards:
What is ‘Ink jet card’ used for?
Used for printing
Papers and Boards:
What are the properties of ‘Solid white board’?
Good quality cradboard
Smooth finnish on both sides
Brilliant white finnish
Easily cut/creased
Papers and Boards:
What is ‘Solid white board’ used for?
Greetings card
State two reasons why corrugated cardboard is used as packaging for cooked pizza. (2 marks)
it is strong and lghtweight
Natural timbers:
Name 3 ‘Soft woods’ (cost effective and readily sourced)
Larch
Pine
Spruce
Natural timbers:
What are the properties of ‘Larch’?
Tough
Easy to work with
Naturally resistant to rot
Natural timbers:
What are the properties of ‘Pine’?
Soft
Easy to work with
Can be quite knotty
Natural timbers:
What are the properties of ‘Spruce’?
Lightweight
Easy to work with
Good resonant properties
Natural timbers:
Name 5 ‘Hard woods’ (decidous - loose leaves)
Balso
Oak
Mahogany
Ash
Beech
Natural timbers:
What are the properties of ‘Balso’?
Soft
Lightweight
Fast growing
Strong
Natural timbers:
What are the properties of ‘Oak’?
Tough
Hard
Durable
Natural timbers:
What are the properties of ‘Mahogany’?
Strong
Durable
Available in wide planks
Natural timbers:
What are the properties of ‘Ash’?
Tough
Flexible
Finnishes well
Natural timbers:
What are the properties of ‘Beech’?
Hard
Tough
Strong
Manufactured timbers:
What are manufactured boards commonly made from?
Woods fibres, chips, blocks or sheets bonded with resin
Manufactured timbers:
What are the general properties of Manufactured boards?
Available in large sheets
Susceptible to moisture
Stable - less likely to waro/twist/shrink/bow
Smooth, flat surface
Can be made from sawmill scraps, reycled wood, low grade timbers and even sawdust
Manufactured timbers:
What are the properties of ‘Medium density fibreboard’? (MDF)
Relatively cheap
Flat, smooth surface
Manufactured timbers:
What are the common uses of ‘Medium density fibreboard’? (MDF)
Flat pack furniture
Shop interiors
Manufactured timbers:
What are the properties of ‘Plywood’?
Very strong
Flat, smooth finnish
Manufactured timbers:
What are the common uses of ‘Plywood’?
Laminated flooring and roofing
Furniture
Manufactured timbers:
What are the properties of ‘Chip board’?
Least expensive - really cheap
Good compressive strength
Edges chip easily
Manufactured timbers:
What are the common uses of ‘Chip board’?
Worktops
Cupboards
Flooring
