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Physics

Cotton
by

Jack Decourcy

on 13 February 2013

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Transcript of Physics

What Is Cotton? Cotton is one of the most used textile fiber in the world today.

Cotton is a product grown Naturally, Cotton has thousands of applications in industries.

One of the most popular uses of Cotton is in the textiles industry. Cotton is one of the most unique fibers in the world.

It consists of hollow twisted tubes of Cellulose that are elongated Epidermal cells.

Cotton is a fairly strong material.
This is related to many
factors. Firstly Cotton is made from
short hollow strands that can easily
snap. Also Cotton

Cotton comes in many grades,
these grades depend the quality
and strength of the cotton. Under the Microscope Cotton Applications In Textiles Cotton has Many applications the most common of these is in the textiles industry.

Cotton Is transformed into thread using a process called Spinning, this draws out the long fibers from the cotton mass and twists them into a long continuous thread.

Once the cotton has been made into thread this then can be used to make many things such as:
Cotton Shirts
Trousers
Socks e.t.c

To make cotton more desirable it is usually colored using different dyes. Cotton unlike other threads is inelastic.

Due to its lack of elasticity this makes it perfect for producing clothing as cotton does not loose its shape when washed

Cotton is stronger than wool however is not stronger than silk or linen. This is due to its microscopic structure as cotton is made of thin hollow tubes that can easily be broke.

Cotton absorbs water and takes a long time to dry. Properties Of Cotton Thread COTTON Used In Textiles Structure Of Cotton
However in finished textiles it is 99 percent cellulose.

Cotton also contains Carbon C, Hydrogen H, and Oxygen O

The image above shows the chemical composition of cotton containing all of the above. The chemical composition of cotton, when picked, is about 94 percent cellulose. Advantages Of Cotton In Textiles
Cotton can be drawn into thread

Cotton is a soft material that can be easily worked with.

Cotton is a material that "breaths well" this is due to its microscopic fiber structure which allows air to pass through the material.

Also Cotton is Hypoallergenic and Dust Mite resistant making it a perfect choice of material for people with allergies.

Also cotton is a reusable material that can be used more than once and retains its shape when washed (Correctly)

Cotton is also relatively cheap and can be dyed to produce a wider range of products and help blend with other materials. Cotton has many advantages in the textile industry Disadvantages Of Using Cotton In Textiles Characteristics Of Cotton Thread Some Characteristics of Cotton Thread are:

Comfortable to touch,
Good absorbency,
Color retention,
Prints well,
Machine-washable,
Dry-cleanable,
Good strength,
Drapes well,
Easy to handle and sew,
Environmentally Friendly. Some disadvantages of using Cotton in textiles are:

It is easily creased,

It burns easily,

Weakens slightly on exposure to light this causes an irreversible change to the chemical structure. It may also cause the cotton to turn slightly yellow in color Manufacturing Process Of Cotton Cotton goes through a long process to refine it from a "boll" to soft cotton we know and love.

Cotton must go through a chemical process to become soft; this process includes washing, boiling, bleaching and exposing the cotton to chemicals such as:

polyvinyl alcohol (Makes the cotton easier to spin)
Hydrogen Peroxide (Bleaches the cotton)
Urea-formaldehyde (Cross links & reduces shrinkage)
Also several waxes and detergents are also used.

There are several manufacturing and refining processes for cotton that produces many different finished products. Cotton Strength Cotton thread is a relatively strong material, this is due to its refining process, cotton fibers are spun into thread this therefore improves the overall strength of the cotton.

Cotton as a raw material is not very strong at all, this is due to its microscopic structure. Cotton consists of layers of shorts hollow cellulose fibers that can easily break.

Also once cotton is spon it is treated with several waxes to improves strength and durability.
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