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MATERIAL SELECTION - PACKED LUNCH CONTAINER

V. Ryan 2013

 

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1. Name two materials which would be suitable for packed lunch container.

Give a reason for each material chosen.
 
 
MATERIAL 1: POLYPROPYLENE
 
REASON:
Polypropylene is a thermoplastic polymer, ideal for the manufacture of reusable containers, such as packed lunch containers. It cis an hygienic material as it can be washed easily and resists stains. It is tough, flexible and durable, withstanding every day drops and knocks. it is supplied in a range of colours. Polypropylene offers good resistance to fatigue.
 
 
 
MATERIAL 2: POLYETHYLENE TEREPHTHALATE, PET, PETE
 
REASON:
PET / PETE is a thermosetting polymer and has good physical properties of strength , ductility, stiffness and hardness. PET / PETE is 100% recyclable. It is light weight and can be crushed / compressed, making it easy to transport to recycling plants. Most supermarkets have collection points. It is supplied in a range of colours.
 
2. Name a substitute material that could be used, that is biodegradable.
 
MATERIAL 1: POLYLACTIDE
 
REASON:
Polymers / plastics have a reputation of being environmentally unfriendly. They take years and in some cases centuries to decay. However, plastic bags made from Polylactide (PLA) take only five years to decompose. Containers such as drinking bottles and food containers manufactured from PLA, take slightly longer to decay, as they are manufactured from thinker material.

Polylactide is referred to as a ‘bioplastic’ because of its environmentally friendly nature.
 
 
 
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