Home | | Science 7th Std | Animal products used as clothing or Animal Fibres

Animals in Daily Life | Term 3 Unit 5 | 7th Science - Animal products used as clothing or Animal Fibres | 7th Science : Term 3 Unit 5 : Animals in Daily Life

Chapter: 7th Science : Term 3 Unit 5 : Animals in Daily Life

Animal products used as clothing or Animal Fibres

Animal hair has a great demand. The hair from goat and sheep is used for manufacturing woollen clothes, shawls and blankets, mufflers and socks. Similarly horse hair is used as bristles in small painting brushes.

Animal products used as clothing

Animal hair has a great demand. The hair from goat and sheep is used for manufacturing woollen clothes, shawls and blankets, muers and socks. Similarly horse hair is used as bristles in small painting brushes. Even fur of animals including the skin is used to make warm and modern style clothes.

 

Animal Fibres

Some fabric fibres such as cotton, jute, silk are called natural fibres. Cotton and jute are examples of plant fibres. Wool and silk fibres are examples of animal fibres. Wool is obtained from the fleece of sheep or goat. It is also obtained from the hair of rabbit, yak and camel. Silk fibre is obtained from the cocoon of silkworm.

 

1. Wool

What  type  of clothes are being used by people of snow capped region? Why such kind of clothing is preferred by them?


Wool is the fibre derived from the fur of animals of the Caprinae family principally sheep. The hair of other mammals like goat, yak, alpaca and rabbit may also be called wool. Mostly, wool is produced from the outer coat of sheep. The processing of wool involves five major steps. They are as follows Shearing, Grading (or) Sorting, Washing (or) Scouting, Carding and Spinning.


Shearing:- The flesh of the sheep is removed from its body. This is called shearing.

Grading (or) Sorting:- The fleece from the same sheep may be different from different parts of the body. It is sorted out into separate piles of similar nature. This is known as Grading (or) Sorting.

Washing (or) Scouting:- The sheared skin is washed thoroughly with soap (or) detergents to remove dirt, dust and grease.

Carding:- The dried wool is carefully removed. These fibres then passed through the rollers which are covered with fine sheet of thin wire teeth. This process arranges the wool into a flat sheet called a web.

Spinning:- The web is drawn into narrow strand and then passed through spinning machines. The spinning machines twist the strands into yarn. The yarn is wound to form balls of wool. This yarn is either weaved into fabric (or) retained for knitting.

 

Characteristic features of wool

* It is resistant to heat, water, wear and tear.

* It absorbs moisture.

* Wool insulates against cold. So wool is a good insulator.

* It does not wrinkle easily.

 

Uses of wool

Wool is a multifunctional fibre with a range of diameters that makes it suitable for clothing, household fabrics and technical textiles. Two third of wool is used in the manufacture of garments including sweaters, dresses, coats and active sportswear. Blended with other natural (or) synthetic fibres wool used as adds drape and crease resistance blankets, anti-static and noise absorbing carpets.

 

2. Silk

Have you ever attended marriage functions? What type of dresses the bride and bridegroom wear? What is it made up of?


Silk is the secretions of the silk moth. Silk is obtained from the cocoon of silk worms, which feed on the mulberry leaves. Silk worms live for a very short time, only about two months. During this period they pass through four stages of development. They are eggs, caterpillars, cocoon and adult moth. These stages are called as life cycle of a silk worm.

The cultivation and production of silk is known as Sericulture. An adult female silk moth lays about 500 eggs. The eggs are then kept in cold storage for six weeks.

The eggs are placed in the incubator. After about ten days, the eggs hatch out and the larvae spend the next 35 days eating mulberry leaves.



The silk worms spend about five days producing silk and spinning its cocoon of a single long thread. The cocoons are boiled to make it easier to unwind the silk and kill the pupae inside. If the silk moths were allowed to hatch, the long silk fibres will get turned by the hatching of moth. Cocoons are unwind and then the individual silk filament is reeled together to form a thread large enough for weaving. The silk thread is cleaned, dyed, woven into fabric.

 

Characteristic features of Silk

* It is very soft, comfortable and versatile

* It can be easily dyed.

* It is the strongest natural fibre.

* It has a poor resistance to sunlight exposure.

 

Uses of Silk

Silk has natural beauty and elegance. It gives comfort in warm weather and warmth during colder months. It is used in the manufacture of classical and high fashion clothes, modern dresses particularly silk sarees, the elegant of beautiful dresses. It is also used in household for making wall hangings, curtains, rugs and carpets. It is also being used in the manufacture of surgical threads for sutures.

India is the world’s second largest silk producing country. Kancheepuram, Thirubhuvanam and Arani are famous places for silk production in Tamil Nadu.

 

Tags : Animals in Daily Life | Term 3 Unit 5 | 7th Science , 7th Science : Term 3 Unit 5 : Animals in Daily Life
Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail
7th Science : Term 3 Unit 5 : Animals in Daily Life : Animal products used as clothing or Animal Fibres | Animals in Daily Life | Term 3 Unit 5 | 7th Science


Privacy Policy, Terms and Conditions, DMCA Policy and Compliant

Copyright © 2018-2024 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.