Polystyrene: PS This plastic is clear, hard,brittle ansd resisitant to acid and base. It is a rather poor barrier to oxygen and water vapor. Polystyrene is used electrically and electronic material and office equipment. SAN (styrene-acrylonitrile) This plastic is optically transparent and is used to produce the material ,electric equipment, auto parts.
ABS (acrylonitrile-butadiene-styrene) The property of this plastis is similar polystyrene but it is more resistant-chemical,more sticky,transparent . It is used to produce bowl and tray. Polyvinylchloride: PVC It is a rather poor barrier to oxygen and water vapor but can prevent lipid. It is transparent that is used to produce oil bottle, alcohol bottle such as vine beer ,plastic packaging to wrap butter, laminated inner-layer of plastic pack. Nylon. This plastic is very stocky,excenllent heat-resistant. It is used to produce Laminate