Synthetic fibres and plastics Worksheet-5
(a) Saucepan handles, (b) Electric plugs/switches/plug boards.
It is resistant to chemicals i.e. it is not attacked by strong acids or strong bases.
It burns slowly with a blue flame having a yellow tip and gives off an odour of paraffin.
The material continues on removal of the flame source and produces a drip.
(1) Plastic is inert i.e. it does not react with the materials stored in the container.
(2) They do not get corroded like metal containers.
(3) They are durable and versatile. Transparent plastic containers help in viewing the contents.
(b). Electric plugs/switches/plug boards are made up of thermosetting plastics because they do not conduct electricity and they also do not melt on heating. Thermoplastics are also bad conductors of electricity but they melt on heating.
It is shiny and lustrous and resembles silk in appearance.
It is durable, less expensive and easy to maintain.
It is a strongest fibre hence is used for making ropes and parachutes.
It has high resistance to insects, fungi and animals, moulds, and many chemicals.
Nylon is used for making bath sponges. These are also called bath puffs or boofpoofs.
All waterproof clothes like rain coats, hats, leggings are made up of nylon.
Articles like socks, ropes, tents, toothbrushes, car seat belts, sleeping bags, curtains are also made from Nylon.
Nylon is also used for making parachutes and ropes for rock climbing.
Nylon is widely used in making tyres and military supplies.
Strong, light weight, and have good elasticity.
Resist wrinkling and springs back into shape when creased.
Can be washed and dried easily and quickly.
Warm, soft, light and flexible.
Resistant to moths and chemicals.
Cheap and available in variety of colours.
Most fabrics made from synthetic fibres require careful ironing as they melt very easily.
Most of the fabrics made from synthetic fibres absorb very little moisture. They become sticky when the body sweats, which makes them uncomfortable to wear in hot weather.
Most of the fabrics made from synthetic fibres catch fire very easily. Synthetic fibres melt on heating so the fabric melts and sticks to the body of the person wearing it. Therefore, one should not wear synthetic clothes while working in the kitchen or in a laboratory.
They dry up quickly
They are durable
Easy to maintain
Easy to wash