Poly Ethylene
Polyethylene or polythene is the most commonly produced plastic. It is a polymer, primarily used for packaging(plastic bags, plastic films, geomembranes and containers including bottels, etc.
Poly Styrene
Polystyrene (PS) is a polymer made from the monomer styrene, a liquid hydrocarbon that is commercially manufactured from petroleum. At room temperature, PS is normally a solid thermoplastic but can be melted at higher temperature for molding or extrusion, then resolidified.