glass fiber in modern world
TRANSCRIPT
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Glass fiber in modern world
PRESENTED BY…….
SUHAN HASSAIN TALUCKDER 13.02.08.004
INTESAR ALI FAHIM 13.02.08.015
MD AL – AMIN 13.02.08.054
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CONTENTS
INTRODUCTON
HISTORY
TYPES OF GLASS FIBER
PROPERTIES
MANUFACTURING PROCESS
ADVANTAGE
DISADVANTAGE
APPLICATION & USES
FUTURE ASPECTS
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GLASS FIBER
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INTRODUCTION
Glass fiber is a material consisting of numerous extremely fine fibers of glass.
Glass fiber combines its light weight with an inherent strength to provide a weather resistant finish with a variety of surface textures
The basic component of glass fibers is silica, SiO2. In its pure form it exists as a polymer, (SiO2)n.
It has no true melting point but softens up to 2000°C,where it starts to degrade.
It is usual to introduce impurities into the glass in the form of other materials to lower its working temperature.
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HISTORY
The ancient Pheonicians and Egyptians were two civilizations that made glass, and both of them made glass into fibers, or made glassfiber. They used this fiber for decoration, unaware of the potential that lay within it.
After that In 1870, a man named John Player developed a process of mass producing glass strands with a steam jet process.
Mass manufacture of glass fiber was only made possible with the invention of finer machine tooling in 1893.
In 1935, Corning Glass joined with Owens-Illinois, another company that had been experimenting with fiberglass, to develop the product further. In 1936, they patented the product "Fiberglas", with only 1 "s.", and then in 1938 the two companies merged to become Owens-Corning, which is still in existance today.
As early as 1942, Owens-Corning was producing fiberglass and polyester airplane parts for the war effort.
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TYPES OF GLASS FIBER
As per ASTM C162 the glass fiber was classified according to the end use and chemical compositions.
E, Electrical
S, Strength
C, Chemical
M, Modulus
A, Alkali
D, Dielectric
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PROPERTIES
Thermal
Glass fibers are useful thermal insulators because of their high ratio of surface area to weight. However, the increased surface area makes them much more susceptible to chemical attack. By trapping air within them, blocks of glass fiber make good thermal insulation, with a thermal conductivity of the order of 0.05 W/(m.K).
Tensile
Fiber typeTensile
strength(MPa)
Compressive
strength(MPa)
Density(g/cm3)
Thermal expansion(µm/m·°C)
Softening T
(°C)
Price($/kg)
E-glass 3445 1080 2.58 5.4 846 ~2
S-2 glass 4890 1600 2.46 2.9 1056 ~20
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PHYSICAL PROPERTIES
Density -2.50-2.55 g/cc
Diameter -10-20 µm
Extension at break (%) -2.5 %
Tensile strength (MPa) -2000-3500
Young·s modulus (GPa) -73
Melting Point -700C
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MANUFACTURIG PROCESS
Glass melts are made by fusing silica with minerals, which contain the oxides needed to form a given composition.
The individual components are weighed and delivered to blending station where the batch ingredients are thoroughly mixed before being transported to the furnace.
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ADVANTAGES
Very high tensile strength
Excellent resistance to sunlight and U
Excellent FR properties
Good dimensional stability
Zero moisture absorbance
Resistant to mildew, rotting and insects
Excellent UV stability
Glass textiles are of comparatively relatively low price (1.25 Euro/kg) so they have found wide applications.
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DISADVANTAGES
Adhesion difficulties.
Relatively heavy.
Glass fibers if breathed into the lungs can promote fatal cancerous growth.
Brittle, poor flexing properties
Poor abrasion resistance
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APPLICATION
Important Commercial Products
Fiberglass Fabric. Fiberglass yarns are converted to fabric form by conventional weaving
operations.
Textile yarns are fine-fiber strands of yarn from the forming operation that are air dried on
the forming tubes to provide sufficient integrity to undergo a twisting operation.
Texturized Yarn. Texturizing is a process in which the textile yarn is subjected to an air jet
that impinges on its surface to make the yarn ’fluffy’’
Carded Glass Fibers. Carding is a process that makes a staple fiberglass yarn from
continuous yarn.
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Contd.
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Contd.
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Contd.
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Contd.
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Contd.
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Contd.
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Contd.
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Contd.
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FUTURE ASPECTS
Reduce it’s weight
Minimize brittleness
Increase flexibility
Increase resistivity to abrasion
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REFERENCES
www.studymafia.org
www.google.com
www.wikipedia.com
http://www.advancedarchitecturalstone.com
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THANK YOU