Hi Guest! Login
 
Study Materials:
CBSE NOTES ⇒ Class 8th ⇒ Science ⇒ Chapter 3. Synthethic Fibres and Plastics

Chapter 3. Synthethic Fibres and Plastics

Fibres And its Types


Chapter 3. Synthethic Fibres and Plastics


Fibre: A thread or filament like structure which is obtained from vegetable tissues or chemical substance is called fibre.

All fabrics are made up of yan which small unit is fibre.

Fabric ⇒ Yan ⇒ Fibre 

‚Äč

Types of fibres: 

(i) Synthetic fibres: The fibres which are made by the human beings is called synthetic fibres.

Example: Rayon, Nylon, polyester and Acrylic.

(ii) Natural fibres: The fibres which are obtained from plants and animal resources are called natural fibres. 

Example: Cotton, Wool and Silk.

Polymers: The small units of fibres which is actually a chemical substance, such many small units combine to form a large single units is called a polymer.

Ex. Cellulose, Nylon, polyester etc.

bead units and paper click here form a long chain just like polymers. 

Polymers are also two types: 

(I) Natural polymers : Cellulose (cotton) is a natural polymer. 

(ii) Synthetic Polymers : Nylon and polyster etc. 

Cellulose : Cellulose is a special kind of carbohydrates (glucose molecules) which naturally obtained from plants. 

History of silk: Silk is a natural fibre which obtained from silkworm and It was discovered in China many many years ago. Chinese kept discovery of silk as a closely guarded secret for a long time. Later silk reached all over the world through China. 

Features of Silk: 

(i) Fabric obtained from silk fibre was very costly.

(ii) Its beautiful texture fascinated everybody.

(iii) It is very soft fibres but very strong. 

(iv) It is also a natural fibre which obtained from silkworm. 

Types of Synthetic Fibres: 

(A) Rayon:

(B) Nylon:

(c) Polyster and Acrylic 

Other Pages of this Chapter:

Select Your CBSE Classes

Important Study materials for classes 06, 07, 08,09,10, 11 and 12. Like CBSE Notes, Notes for Science, Notes for maths, Notes for Social Science, Notes for Accountancy, Notes for Economics, Notes for political Science, Noes for History, Notes For Bussiness Study, Physical Educations, Sample Papers, Test Papers, Mock Test Papers, Support Materials and Books.