Polyester Fibers

An basic introduction about polyester fibers.

1. A presentation on Polyester Fiber 1

2. Presented by S. M. ZAKI MUJAHID Roll No.: 172219 1 st Batch, Session : 2017-18 Dept. of Textile Engineering Jashore University of Science and Technology, Jashore , Bangladesh 2

3. Introduction Polyester is a man-made synthetic polymer filament or staple fiber which is derived as a salt formed from the reaction between an alcohol & an acid. Polyester fiber are chemically composed of at least 85% by weight of an ester of a substitute atomic carboxylic acid, including but not restricted to substituted Terephthalate units and Para substituted hydeoxybenzoate units. Here degree of polymerization is 115-140. Fig: Polyester Fiber 3

4. Microscopic View Figure: Microscopic view of Polyester 4

5. Types of Polyester Polyethylene Terephthalate fiber (PET Polyester) Poly-1,4-cyclo hexyline Dimethylene Terephthalate fiber ( PCDT Polyester ) Other type of polyester fiber 5

6. Chemistry of Polyester Polymer Figure: Polymerization of Polyester (Left: PET; Right: PCDT) 6

7. Manufacturing of Polyester (PET) Filament Polymerization Drying Melt spinning Drawing the fiber Winding 7

8. Properties Of Polyester Physical Properties Tenacity : up to 85 cN / tex Elastic Recovery : @2% = 98; @5% = 65 Hygroscopic Nature Moisture Regain: 0.2-0.5 % Thermal Properties Heat Resist: 150-200 C Chemical Properties Effect Of Acids Effect Of Alkalis Effect Of Bleaches Sunlight Micro-Organisms 8

9. Consumption of Polyester 9

10. Characteristics of Polyester Fiber Strong Resistant to stretching and shrinking Resistant to most chemicals Quick drying Crisp and resilient when wet or dry Wrinkle resistant Mildew resistant Abrasion resistant Retains heat-set pleats and crease Easily washed 10

11. Blending of Polyester with Fibers Polyester-Cotton ( Resist wrinkles, Resist stains, Retain shape ) Polyester-Wool ( Wrinkle resistance, Shape retention, Increase durability ) Polyester-Rayon (More durable, Shape retention, More resilience) Polyester-Spandex (Used in active-wear) 11

12. Uses of Polyester Fiber Apparel : Every form of clothing. Home Furnishings: Carpets, curtains, draperies , sheets and pillow cases, wall coverings , and upholstery. Other Uses: Hoses, power belting, ropes and nets, thread, tire cord, auto upholstery, sails , floppy disk liners, and fiberfill for various products including pillows and furniture. 12

13. Limitation of Polyester Low absorbency Static & pilling form Temperature sensitive Not as breathable Not environment friendly. 13

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