CBSE CLASS 7 Fibre To Fabric PDF
CBSE CLASS 7 Fibre To Fabric PDF
CBSE CLASS 7 Fibre To Fabric PDF
Fibres
The basic necessities for human beings are food, shelter and
clothing.
Depending on the climate of the place people, wear different
clothes. Clothes are made of different types of materials.
For example: Cotton sari is mad
made e of cotton, Leather jacket is
made of leather, Sweater is made of wool, etc.
Fibre and fabric
Fabrics are made up of strands called yarns, which are made
from even thinner strands, called fibres.
Fibres can be classified as natural fibres and synthetic
fibres.
2. Jute Fibre:
A jute plant
Jute fibre comes from jute plants, which are mainly grown in
places that have high temperatures and plenty of rainfall.
Jute is cultivated during the rainy season. In India, jute is
cultivated in West Bengal, Bihar, Andhra Pradesh, Uttar
Pradesh, Assam, Chhattisgarh and Tripura.
On the left we can see a charkha and on the right we can see
a simple takli.
Conversion of Yarn to Fabric
For the conversion of yarn to fabric two main processes are
used. They are weaving and knitting.
Weaving
Weaving is the process of arranging two sets of yarns together
perpendicular to each other to make a fabric. Fabrics are
woven on looms. These looms may be operated by power or
by hand.
The above figure represents the process of weaving.
Knitting
Knitting is a process that makes use of a single yarn to make
a piece of fabric. While knitting, a single yarn is used to make
a piece of fabric. That is why, if you pull a single yarn from a
torn woolen garment, it keeps unraveling.
Knitting can be done by hand or o on machines.
Silk cotton
Silk cotton is obtained from kapok tree.. The fruits of this tree
contain fibres. These fibres are light and fluffy.
Silk cotton is used commonly use
used d as stuffing in pillows,
sleeping bags and life jackets.
Hemp
Another important plant fibre is hemp. Hemp fibre is obtained
from the stems of hemp plant. It is mostly used to make
ropes, carpets, clothes and papers and nets.