APET
(Amorphous Polyethylene Terephthalate)
Properties
- Excellent transparency and gloss
- Excellent gas, water, and chemical barrier properties
- Non toxic
- High impact resistance
- Excellent deep forming
Applications
- Vacuum forming
- Food packaging
- Folding boxes
- Stationary
PS
(Polystyrene)
Properties
- Hard
- Limited flexibility
- Can be recycled
- Inexpensive
- Ubiquitous in everyday lives
Applications
- Foam packaging
- Insulation
- Computers
- Toys
Static Electricity
- Stationary charges of electricity (voltage)
- Generated by sliding or rubbing
- Potential up to 40,000 volts
- Remains in localized contact area (for plastics)
Electrostatic Discharge (ESD)
- “Quick” voltage reduction
- Caused by Arc or spark
- Possible result
Micro circuit damage
Painful shock
Surface Resistivity
- Resistance to electricity on a material surface (ohm/cm)
- Higher-More Insulative (Most Plastic)
- Lower-More Conductive (Most Metal)