Y11 PPE 1 Revision Flashcards
What is ‘Design for disassembly’?
Where a new product is designed so it can be easily taken apart at the end of its lifetime - so it parts and materials can be reused or recycled.
What is planned obsolescene?
Where the product is designed to have a short lifespan and become useless quickly.
Why can the continuous development of new products be bad?
Because it can encourage consumers to replace existing products with new ones, which causes a carbon footprint.
The new products and packaging being eventually disposed of can result in the increased usage of finite resources and environmental damage.
What are the 6R’s?
Repair
Re-use
Recycle
Rethink
Reduce
Refuse
What is the weight of paper and board measured in?
gsm - (grams per square metre)
What does solid white board have?
A high quality bleached surface, which allows for printing.
What is corrugated card made up of?
A fluted inner core that is ideal for printing, and adds strength and rigity.
What does duplex board have?
A different colour and texture on each side, where one side is smooth for printing.
Where do softwoods grow?
Colder climates and are fast growing - makes them cheap and readily accessible.
Where do hardwoods grow?
Warm climates and are slow growing - more expensive than softwood.
What do ferrous metals contain?
Iron
What is often applied to ferrous metals to prevent rusting?
Protective coatings such as paint.
Do non-ferrous metals rust?
No
What are the two types of plastics (polymers)?
Thermoforming and thermosetting plastics.
What are properties of thermoforming plastics?
-Don’t resist heat well; easily formed into different shapes by heating, melting and remoulding.
-Easy to recycle.
What are the properties of acrylic?
-Hard, stiff and shiny.
-Weather resistant
-Used to make signs (Fire exit signs)
What are the properties and uses of high density polyethylene?
-Stiff,strong but lightweight.
-Used for baskets, folding chairs.
What are properties of thermosetting plastics?
-Resistant to heat and fire
-When moulded, become permanently hard and rigid.
-Non recyclable
What do smart materials do?
Change their properties in response to stimuli.
What are shape memory alloys?
Alloys that remember their original shape. (Can be returned to original shape when heated above a certain temperature).
What do photochromic pigments do?
Change colour reversibly in response to light.
What are thermochromic pigments and inks used in?
Colour changing products - They react to temperature. (Baby feeding spoons, mugs - denisdaily)
When the temperature changes the product changes colour, then changes back when the object returns to it’s original temperature.
Why should card based food packaging be printable on?
So the customer can see the advertising and nutritional information for what they are buying.
Why does corrugated card have to be waterproof and airtight?
To prevent the food inside from going bad.
