It is mainly depends on your type of polymer and the method that you are going to fabricate the fiber. Better to specify your question.

I agree with Ebrahim Abouzari-Lotf

It's a good question, I am following that answers

It is specifically about essential requirements of Textile fiber forming polymers.

It actually depends on the type of application your are intended to for using polymer fibers. "Denier" is the most important aspect and unique characteristic of fiber to be taken care of.

Regards

Arpit Chaudhary

Polymers, with fiber-forming properties, usually have linear structures with groups that allow for strong inter-molecular attractive forces with no presence of bulky side groups. Structure determines properties so these polymers will have high mechanical strength as well as high melting points.

Fiber-forming polymers are usually flexible with a high degree of symmetry on macromolecular scale & the macromolecules will have high molecular masses specially if there are no inter-molecular hydrogen bonds or dipole-dipole interactions.

The macromolecules will have capacity to assume an extended configuration that can be an adequate requirement for ordered alignment which points to high degree of crystallization. When the polymeric molecules look like "parallel" zigzags , then there will be a high degree of orientation of these molecules and thus there will be a good tensile strength.

I shall give 2 examples: Nylon-6,6 is well-known as a fiber-forming polymer & most of what I said above applies to it.

Polypropylene (PP) is also fiber-forming but many chemists do not know that. The –CH3 group is considered as bulky for simple organic compounds but it is not bulky in giant PP macromolecules. Once there is isotactic PP, with high average molecular mass, then there will be many London forces that align & orient the structure to render it suitable for forming fibers.

Carpets "containing fibers, of course" can be made from polyamides & polyesters but the cheapest are the carpets that are made from PP.

Note: Many years age, one of my "late" British professors was a great specialist in this subject. I just summarized what I was taught by him using my own language. I hope that I did well!

Thank you very much sir for your very scientific answer.

he polymers should be polar, enable them to attract water molecules.

polymers must satisfy the minimum requirements if it is to serve as a fibre. Those requirements are (Flexibility, Molecular Mass, Configuration, Crystallinity, and Orientation )

ØThese two basic requirements are met in the following manner:

1.Long-chain molecules – provided in the form of linear polymer molecules as the building blocks of fibers (or a sort of skeleton)

2.A more or less parallel arrangement of the above long-chain molecules

3.Lateral forces to hold the molecules as a stable or coherent structure

4.Some measure of freedom of the long-chain molecules in order to give the necessary extensibility to the fiber

5.Some measure of openness to give room for moisture absorption and uptake of dyes.