like cotton, silk are made of yarns and yarns are made of
Types of Fibers:
Fibers: Cotton, jute [plant], silk [cocoon of
silkworm], wool [sheep, goats, rabbits, yak, camels hair]
are made of fibers of plants and animals.
is a polymer of cellulose, which is made up of large
number of glucose units.
wool is obtained from angora goats of J&K. Wool of
Kashmiri goat is used to make pashmina shawls. Llama and
alpaca of South America also yield wool.
– Rearing of silkworms to obtain silk.
Properties of Natural fibers:
1. Cotton: Obtained from fruits [bolls] of the
plant. Grown in black soil and warm places.
during flowering stage.
Grown during rainy
Stem are immersed in water and they rot. Then fibers are
Flax: A natural fiber from plants.
fibers burn easily and stick to the body of person.
Synthetic fibers are all made from petrochemicals.
is artificial silk it’s made by chemical treatment of wood
is a fully synthetic fiber made up of coal, water and air.
A string of nylon is stronger than string of steel so it’s
used in making parachutes and ropes.
is used for wrinkle free clothes.
is polyester. PET is polyester used for making bottles,
utensils, wires etc
is artificial wool.
are Polymers. Some bend on heating and are called thermoplastics
[PVC, Polythene]. Some molded once don’t change
their shape called thermosetting plastics.
is used in non stick cookware. Melamine is
used on coat of firemen so it makes them flame resistant.
– is manufactured from rubber latex which is a
colloidal dispersion of rubber in water. It’s a linear
polymer of isoprene called cis 1, 4 isoprene. Since
natural rubber is brittle at low temperatures and soft at
high temperatures it is treated with Sulfur in a process
– Raj, Punjab
bushair – UP, HP
Raj, Punjab, Haryana
pathanwadi – Gujarat
Table 1: Sheep breeds of India
is a blood disease common among wool sorters.
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