Plastic Flashcards
(22 cards)
The three thermo plastics are
Acrylic
PVC
rigid polystyrene
Acrylic properties
Hard wearing
Shiny
Comes in range of colours
PVC properties
Strong
Light weight
Durable
Rigid polystyrene whats good abt it
Light
Strong
Acrylic uses
Display signs
Baths
Machine guards
PVC uses
Air and water pipes
Shoe soles
Rigid polystyrene uses
Vacuum forming
School project work
What is the 3 thermo setting plastics
Melamine
Epoxy resin
Uses formaldehyde
Melamine properties
Heat resistant
Hard
Scratch resistant
Melamine uses
Tableware
Worktops
Epoxy resin properties
Resistant to chemicals
Heat resistant
Strong
Exopxy resin uses
Circut boards
Glue
Urea formaldehyde properties
Strong durable
Urea formaldehyde uses
Electrical switches
Handles
Plastic advantages
Comes in lots of colours
Can be shaped easily
Non toxic material
Low cost
Plastic disadvantages
Not good for the environment
Why are plastics used in schools
Range of colours
Easy to form and reshape as both thermoplastics
They can be easily cut using a coping saw
They can be finished to a high standard (they can be polished to make them really shiny)
First step when working with plastic
Mark on plastic with steel ruler and pen
Second step
When we cut plastic into desired shape we use a coping saw This is used to make cut curves in thin pieces of plastics
Third step when working with plastic
We finish the edges of the plastic with a file this tool removes stratcges on the plastic edge -cross filing-draw filing
4th step when working with plastic
We use wet and dry paper which is like sand paper and it takes away any saw marks
5th step when working with plastic
Finally we finish plastic yo make it shiny and smooth using the polisher
