Polyester Fiber | Physical And Chemical Properties Of Polyester Fiber

Polyester Fiber

Polyester is a very important manmade fiber. When it produces with a long-chain synthetic polymer with ester. Chiefly, polyester is produced by the melt spinning process. Additionally, it is the most commonly used synthetic fiber among other synthetic fibers. In the first place, DuPont introduced its Dacron polyester brand in 1951, but the material itself was patented earlier in 1941. All over, the use of polyester fabrics increases day by day. Polyester has some physical and chemical properties in similar fashion which are important to know.

Figure: Polyester Fiber

Physical Properties of Polyester Fiber:

The polyester fiber has good elasticity, shape retention, wrinkle resistance, an excellent wash and wear performance as well as durability in its physical properties. As a result, in all kinds of apparel fabrics the use of polyester fiber increases. At the same time, polyester fiber is poor in moisture absorption, its clothing makes the wearer feel hot and sticky it also produces static electricity easily which reflects in clothing absorbing dust and clinging to the body, which in fact, has poor comfort. Moreover, polyester has an excellent performance in the dyeing process.

Like cotton or other textile fiber, furthermore, polyester fiber consists of some important physical properties. The following are the important physical properties of polyester. They are-

  1. Tenacity: 5 – 7 gm/den
  2. Elongation at break: 15 – 30%
  3. Elastic modulus: 90
  4. Elasticity: Good
  5. Moisture Regain (MR%): 0.40%
  6. Specific Gravity: 1.38
  7. Melting point: 2500C
  8. Volumetric Swelling: None
  9. Ability to protest friction: Excellent
  10. Color: White
  11. Light reflection ability: Good
  12. Lusture: Bright

Chemical Properties of Polyester Fiber:

The following are the various types of chemical properties of polyester fiber. They are:

  1. Acids: Good resistance to acids in cold condition. But polyester degrades by H2SO4 at high temperature.
  2. Basic: Good resistance to basic in cold condition but Strong NaOH dissolves polyester in boiling.
  3. Effect of bleaching: Polyester does not affected by bleaching process.
  4. Organic solvent: Organic solvent does not affect on polyester fiber.
  5. Protection ability against mildew: Good
  6. Protection ability against insects: Good
  7. Dyes: Polyester could be dye with disperse, azoic color and some pigments.
  8. Solvents of polyester: Following are the solvents of polyester:
    1. Chlorinated hydrocarbon.
    2. F3COOH
    3. Phenol (in hot condition)

So, during the processing of polyester, we have to consider its physical and chemical properties. The fiber is manufactured in different shapes and sizes for use in specific purposes. Last not least, In a polyester manufacturing unit, the management should follow all compliances issues regarding workplace safety.

14 thoughts on “Polyester Fiber | Physical And Chemical Properties Of Polyester Fiber”

  1. Hi, I am Onkar, Knit fabric technologist . looking for the suitable polyester yarn / Nylon yarn for high elongation as well as high stretch at both warp and weft direction in Knit fabric Inter lock based in weft knitting.

    Please suggest the best one. Fabric application is backing of artificial leather for automotive.

    Regards,/Onkar Tiwari

    • Hello sir
      Hotmelt is visible in my knitting fabric and there is hot melt patches in shoes upper how can I resolve this while upper is made please suggest

  2. Dear Brother

    Your site is very useful but if you gave the sources from where you are getting information from that would be great. If we use this site for the project professor does not accept it you have not references. If possible add the sources.

    Best regards

  3. AMAZING I’m doing a research project in science and this is exactly what I needed. Thank you very much. I will be visiting this website very frequently.

  4. Why doesn’t some smart person, find a way to easily get wrinkles out of POLYESTER. MY curtains look quell beast. Make something that can be sprayed on and whoosh, the wrinkles go away. You would make a fortune, polyester would be more popular than ever.


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