Group E(Sasank,Justin, Chia Wei,Jia Tong)
1.Plastics are classified according to the Plactic Identification Code.
What are the types of plastic represented by different codes?
Plastic #1: Polyethylene Terephthalate (PET or PETE)
Plastic #2: High Density Polyethylene (HDPE)
Plastic #3: Polyvinyl Chloride (PVC)
Plastic #4: Low Density Polyethylene (LDPE)
Plastic #5: Polypropylene (PP)
Plastic #6: Polystyrene (PS)
Plastic #7: Other (O)
2.What characteristics of plastic make them popular?
-Resistant to corrosion and chemicals
-Low electrical and thermal conductivity
-Resistant to water and have low toxicity.
-Resistant to shock
3.What environmental problems are caused by the
prevalent use of plastics?
-Hazardous to wildlife(Choking hazard)
-Depletion of ozone layer
4. How does technology help solve these
-Technology for recycling plastic is available. However,
the market for recycling certain plastics is very small and
Polyethylene terephthalate also known as PET or PETE.
Application:The vast majority of Disposable soda and Water bottles.
-Excellent wear resistance
-Low coefficient of friction
-Superior dimensional stabilty
High-density polyethylene or PE-HD.
Application:Milk jugs, Detergent bottles, Juice bottles, Butter tubs, and
-Resistant to chemicals and moisture
-Permeable to gas
-Ease of processing and forming
● It is a polymer made by catalytic polymerization of
● Properties:strong, difficult to burn, strong acid and
bases resistance comparing to other chemical and
● Common Application:Plastic pipes, outdoor feature,
shrink wrap, water bottle, salad dressing,
04-PE-LD A.K.A Polyethylene low-density
● It is made from monomer ethylene.
● Properties: relatively low tensile
strength at yield and surface hardness,
high viscosity, soft to rigid, sensitive to
tension cracks, water repellent
Application: Dry cleaning bags, produce
bags, trash can liners, food storage
Polypropylene or polypropene.
-Resistant to many chemicals
Application: Trays, pails, bottles and funnel.
Polystyrene or more commonly known as Styrofoam.
-Bad conductor of heat
Applications: trays, containers, disposable eating utensils,
foamed cups, plates, and bowls.
● (Other) is the category which covers all the
other plastic materials other than the 6 listed.
Or the other things that are made with plastic
resin, or has multiple types of plastic resins
in it(MIX) For example: BPA, polycarbonate
● The properties depends on the resin or the
combination of resins used in the plastic
● It can be applied in bottles