Classification of plastic is determined by two variants :
Thermoplastics: Plastics that are repeatedly molded and re shaped.
By application of heating and cooling cycle under pressure.
example:polypropylene,polyethylene,polyvinyl chloride.
out of total plastics 85 % of plastics are Thermoplastics other 10-15% is Thermoset plastics.
Below fig shows Thermo plastics
Thermoset plastics
Plastics ones shaped by application of heat and pressure.
Do not have versatility of repeat process ability.
Example : Phenol formaldehyde.
Plastic materials:
Polypropylene:
common general plastics excellent flex resistance integral in product such as cases,powder boxes,Tiffin boxes.
Polyethylene:
- LDPE: carry bags,milk packets,shampoo sachets.
- HDPE: Plastic crates,petrol cans,Jerry cans,pipes,fuel tanks.
- POLY VINYL CHLORIDE:Good electrical properties,good out door weather resistance.
Polystyrene:
- GPPS : Highly transparent low cost case of molding,crystal clear,coloured.
- HIPS:High impact strength of good toughness compared to GDPS.
Example: Bath Room cabinets.
ABS{Acrylonitrile Butadiene styrene}
- High impact strength.
- High surface gloss unlimited color ability.
- Computer monitor,Telephone body,AC,Mixer,Washing machine.
