The clothes that we wear are made up of fibres, which obtained from natural or artificial sources. So there are basically two types of fibres-
a) Natural fibres which are obtained from animals and plants. Ex: cotton, wool, silk,
b) Synthetic fibres which are made by human beings. Ex: nylon, rayon, etc.
WHAT ARE SYNTHETIC FIBRES?
Synthetic fibre is a chain of small units joined together. Each small unit is actually a chemical substance. Many small units combine to form one large unit called as polymer.
TYPES OF SYNTHETIC FIBRES
A) RAYON
B) NYLON
C) POLYESTER
D) ACRYLIC
CHARACTERISTIC OF SYNTHETIC FIBRES
PLASTICS
CHARACTERISTIC PROPERTY OF PLASTICS
1) Plastic is non reactive
Plastic do not react with water or air. They do not corrode easily. That is why they are used to store various kind of material, including many chemicals.
2) Plastic is light, strong and durable
It can be moulded into various shape and sizes, it used for various purposes.
3) Plastics are poor conductors
They are poor conductors of heat and electricity. So they are used to make the covering of electricity wires and handles of tools.
PLASTIC AND THE ENVIRONMENT
Biodegradable- a material which get decomposed by natural process such as action of bacteria, is called biodegradable material.
Non biodegradable - a material which cannot be easily decomposed easily by the natural process is known as non biodegradable material.
Disposal of plastic is a major problem. let us see how-
Plastics are non-biodegradable and do not decompose over several of years. when they are burned they release lots of toxic and poisonous fumes into the atmosphere causing air pollution.
Some solutions to this problem -