Make a table of man made plastics with the following heading a) Recycling code b) Name of polymer c) Common applications d) Safe for alimentary use e) Reusable

Answer:

Explanation:

Plastic Type General Properties Common Household Uses

Polyethylene

Terepthalate

Good gas & moisture barrier properties Mineral Water, fizzy drink and beer bottles

High heat resistance Pre-prepared food trays and roasting bags

Clear Boil in the bag food pouches

Hard Soft drink and water bottles

Tough Fibre for clothing and carpets

Microwave transparency Strapping

Solvent resistant Some shampoo and mouthwash bottles

High Density

Polyethylene

Excellent moisture barrier properties Detergent, bleach and fabric conditioner bottles

Excellent chemical resistance Snack food boxes and cereal box liners

Hard to semi-flexible and strong Milk and non-carbonated drinks bottles

Soft waxy surface Toys, buckets, rigid pipes, crates, plant pots

Permeable to gas Plastic wood, garden furniture

HDPE films crinkle to the touch Wheeled refuse bins, compost containers

Pigmented bottles stress resistant

Polyvinyl

Chloride

Excellent transparency Credit cards

Hard, rigid (flexible when plasticised) Carpet backing and other floor covering

Good chemical resistance Window and door frames, guttering

Long term stability Pipes and fittings, wire and cable sheathing

Good weathering ability Synthetic leather products

Stable electrical properties

Low gas permeability

Low Density

Polyethylene

Tough and flexible Films, fertiliser bags, refuse sacks

Waxy surface Packaging films, bubble wrap

Soft – scratches easily Flexible bottles

Good transparency Irrigation pipes

Low melting point Thick shopping bags (clothes and produce)

Stable electrical properties Wire and cable applications

Good moisture barrier properties Some bottle tops

Polypropylene

Excellent chemical resistance Most bottle tops

High melting point Ketchup and syrup bottles

Hard, but flexible Yoghurt and some margarine containers

Waxy surface Potato crisp bags, biscuit wrappers

Translucent Crates, plant pots, drinking straws

Strong Hinged lunch boxes, refrigerated containers

Fabric/ carpet fibres, heavy duty bags/tarpaulins

Polystyrene

Clear to opaque Yoghurt containers, egg boxes

Glassy surface Fast food trays

Rigid or foamed Video cases

Hard Vending cups and disposable cutlery

Brittle Seed trays

High clarity Coat hangers

Affected by fats and solvents Low cost brittle toys

There are other polymers that have a

wide range of uses, particularly in

engineering sectors. They are identified

with the number 7 and OTHER (or a

triangle with numbers from 7 to 19).

Nylon (PA)

Acrylonitrile butadiene styrene (ABS)

Polycarbonate (PC)

Layered or multi-material mixed polymers