Write advantages and disadvantages of plastic as a material for container and state its type.

Write advantages and disadvantages of plastic as a material for container and state its type.
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1 Answer

Answer :

Advantages:

1. Light in weight and can be handled easily.

2. Poor conductor of heat.

3. Sufficient mechanical strength.

4. Transported easily.

5. Unbreakable.

6. Available in various shapes and sizes.

7. Good protection power.

8. No formation of flakes.

Disadvantages: 

1. Permeable to water vapour and atmospheric gases.

2. Cannot withstand heat without softening or distortion.

3. May interact with certain chemical to cause softening or distortion.

4. May absorb chemicals such as preservatives.

5. Relatively expensive.

6. Special type of gum or adhesive required for labeling.

 Types  

A) Thermosetting type:

Ex: Phenol formaldehyde resin and. Urea formaldehyde resin.

 B) Thermoplastic type:

Ex:Polyethylene terephthalate (PET or PETE)

High-density polyethylene (HDPE)

Polyvinyl chloride (PVC)

Low-density polyethylene (LDPE)

Polypropylene (PP)

Polystyrene (PS)

Polyester (PES) etc.
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