Name: Biodegradable and Non-biodegradable Materials
Uploaded: 2019-07-19
Duration: 3 min 39 s
Description: Biodegradable materials get decomposed through natural processes into simple compounds. Materials that are not easily decomposed by natural processes are cal...

Question

A plastic container used for storing food or water usually has a number I, 2, 3, 4, 5, 6, or 7 printed on it. What is the significance of these numbers?

Accepted Answer

1) The plastic container having number 1 is PET (Polyethylene terephthalate), which is usually used in soft drinks and water bottles.
2) The plastic container having number 2 is HDPE (High-density polyethylene), which is used in general packaging.
3) The plastic container having number 3 is PVC (Polyvinyl chloride), which is used in flooring pipes, sheets, etc.
4) The plastic container having number 4 is LDPE (Low-density polyethylene) and is used to make carry bags.

5) The plastic container having number 5 is PP (polypropylene), which is used to make food containers, such as Tupperware.
6) The plastic container having number 6 is PS (polystyrene), which is used to make throw cups.
7) The plastic container having number 7 is all those that do not fall in the category from number 1 to 6, but the most common is polycarbonate, which is used to make baby bottles.

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