Product Design (Small Miracles of Technology)

- Polyethylene Tetraphalate a co-polymer

- 330ml contents

- Weighs10gms

- Wall 0.2mm thick

- Withstands a pressure of 4 bar up to 10 bar

- Virtually indestructible

- Safer/less accidents

- 1.5 billion thrown away annually

Advantages -

- Ribbed cap for greater strength

- Slots release gas gradually – cap does not fly off

- Very high tensile strength

- High impact resistance

- Non permeable

- Made by injection blow moulding

- Recyclable

- Petaloid base does not blow out

- Aluminium comes from bauxite

- Weighs 12gms

- Takes as much energy to make 1 can as it does to use a 100w bulb for 6 hours

- Scrap value of 1p

- Wall thickness 0.1mm

- Can support weight of 115 kgs

- Opening tab cannot be removed from can - less litter

- Inverted dome base does not balloon out

- Top is thicker than the sides

- To reduce materials the top is a smaller

- Made by drawing & ironing method – pressed into a shallow dish first the using deeper dies

- Recyclable

- A lot of material - Thick glass

- More difficult to manufacture

- Raw materials more expensive

- Therefore more expensive

- Heavy

- More expensive to recycle –high melting point

- Therefore less likely to be recycled

- Breakable

- Less versatile

- Product less appealing to customers

- Can be recycled

- Can be reused

- Can be washed

- Can be shaped by blow moulding

- Coloured glass can be used

- Glass can be embossed

- Has a good quality feel

- More rigid than polymers

- Less affected by heat

- Can have high heat resistance