This presentation is all about polyester fiber.

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2. AbuBakar (20-NTU-TE-0171)
M Masood (20-NTU-TE-0156)
Dr. Hafiz Shahbaz
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3. Introduction
 Long-chain polymers (ester, dihydric alcohol, terephthalic acid)
 Derived from coal, air, water, and petroleum
 Chemical reaction between an acid and alcohol.
 Stable and Strong
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4. Structure of Polyester
 Two main components at 473k
1. Terephthalic acid
2. Ethylene glycol
 Polyester a strong and stiff material (pi electrons)
For pure polyester, the tensile strength at rupture is 27 MPa with a Young's modulus
of 920 MPa
 PET and PBT
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5. Manufacturing of polyester
POLYMERIZATION
 dimethyl terephthalate is first reacted with ethylene glycol in the presence of a
catalyst at a temperature 150-210°C.
 a monomer (single, non-repeating molecule) alcohol, is combined with terephthalic
acid and raised to a temperature of 280°C.
DRYING
 Molten ribbon is cooled and extend to fiber
MELT SPINNING
DRAWING
WINDING
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6. PROPERTIES OF POLYESTER
 Tenacity of polyester fiber
 Elastic plastic nature
 Hydrophobic nature
 Thermal properties
 Effect of acids
 Effect Of Alkalis
 Effect of bleaching
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7.  Effect of sunlight
 Color fastness
 Microorganisms and bacteria
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8. Applications
 Clothing
 Home furnishing
 Tyres
 Conveyer belts
 Safety belts
 Cushioning and insulating gloves
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