Fiber, Yarn and Fabric : Fibre to Fabric - Science, Class 7 Video Lecture

hello kids today we shall learn about
the fabrics now we know there are
different types of fabrics or clothing
materials which we use according to the
season and even weather conditions for
example we use natural fabrics like
cotton Jude silk wool at even synthetic
fabrics like nylon polyester etc now let
us understand how a fabric is made in
general from far a fabric seems like a
continuous piece but if we observe it
very closely or if we see through a
magnifying glass we would write that
there are many strings overlapping each
other and there is a fixed pattern to it
the various strings may be Criss
crossing each other or there may also be
strings in formed of closed loops this
kind of arrangement has to be done in
order to keep the strings firmly
together in form of a cloth what exactly
is used to make a fabric let us have a
close look to know how a fabric is
formed if we tear a piece of old ragged
cloth and look into the edge of the
cloth where it is torn
we will find many strings these are
yarns different types of yarns are used
to make different fabrics this
arrangement of yarn is done by few
methods and these are very interesting
to watch or see you must have seen your
mother or grandmother making sweaters
she uses two big needles to make the
lubed pattern for making a sweater or
other Volant cords you know only a long
single yarn is used to make various
clothing items a single yarn turns into
a big sweater isn't it amazing this
method is called knitting knitting can
be done both by hands as well as by
machines or Justin sweaters knitting is
so used in something else if a small
string comes out of your old torn socks
and you try to remove it by pulling you
will find that the single yarn gets
pulled out continuously it seems like
there is no stopping to it this is
because it is made out of a single Lian
so in knitting we saw only a single yarn
is used sometimes two yarns are arranged
together to form a fabric and this
method is called weaving in weaving two
distinct sets of yarns are interlaced at
right angles to form a fabric looms are
used for weaving and the looms can be
driven by man which is called hand loom
or it can also be driven by electricity
which is called power loom looms are
used to produce most of the fabrics if
you go to village you will find many
Weaver's making clothes using the loom
and you will love to watch it so we saw
either by weaving or knitting yarn a
fabric was formed there can be other
methods too but how do we get yarn for
the fabric if we take a piece of yarn
and hold one end of it and then scratch
other end of the yarn along its length
you will find yarn is splitting into
thin strands these are fibers so the
yarn is made of many thin fibers twisted
together
also while trying to thread a needle
many a time you may find that the end of
the thread gets separated into few thin
strands the thin strands of the thread
that we see are made of still thinner
strands called fiber so the yarn is made
of fibers
you know the process of making yarn from
fibers is called spinning now the
question is where do we get the fiber
from we already know we get cotton from
the cotton plants actually it is the
cotton fibers which we get from the
cotton plant similarly it is the jute
fiber which is obtained from the jute
plants silk fiber is drawn from the
cocoon of the silkworm wool is obtained
from the fleece of sheep or goat and
even from the hair of rabbits yak and
camels also synthetic fibers are used to
make synthetic fabrics like nylon and
polyester in a nutshell the fabric is
generally obtained by weaving or
knitting of yarn and yarn is a
continuous strand of twisted natural or
synthetic fibers such as wood or nylon
or we can say it the other way round the
fibers are the thin strands or threads
of natural or synthetic material by
spinning multiple strands of fibers are
twisted to form a single continuous
strand of yarn and lastly by weaving or
knitting of different leon's we get
different fabrics right kids that was
all for today bye bye kids