Polystyrene (PS) is classified into 3 groups. General Purpose Polystyrene (GPPS), Expanded Polystyrene (EPS) and High Impact Polystyrene (HIPS) is a versatile plastic that can be rigid or foamed.
GPPS is clear, hard and brittle. Its clarity allows it to be used in occasions when see-through ability is important – as in medical and food packaging, in laboratory ware, and in certain electronic uses.
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HIPS is cloudy and comes in a slightly off-white tone. It is as hard as GPPS but not as brittle as.
All PS materials carries the recycle logo no. 6
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Expanded Polystyrene (EPS) is one of 3 major groups of Polystyrene materials – the others being GPPS and HIPS.
There are many applications for this material and its usage ranges from packaging to disposable items, as well as for insulation purpose.
This material is commonly extruded into sheets for thermoforming process. It is used for making trays for meats, fruits, as well as into containers such as egg crates.
EPS can also be directly formed into cups, plates and bowls for use as disposable wares in parties. It can be molded into complex shapes for use as packaging component and as protection for fragile products like TVs, DVD players, porcelain, glass, etc. – during transportation.
Both foamed sheet and molded tubs are used extensively for take-away food packaging due to their lightweight, stiffness and excellent thermal insulation.
This material is also commonly known as Styrofoam.
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