Question

What is nylon 6 composed of?

What is nylon 66 composed of?

What is polyester? Polypropylene? Polyethylene? Polyacronitrile?

What are the structural parameters that characterize the microstructure of a fiber?

How is crystalline region different from amorphous region?

How is an oriented fiber different from an un-oriented fiber?

What fiber properties are controlled by molecular orientation and crystallinity?

What are aramid fibers? Give some examples of aramid fibers.

What are natural fibers and how are they classified?

What are manmade fibers and how are they classified?

What are primary wall, secondary wall and lumen as they apply to a cotton fiber?

What is moisture content as it applies to fibers? How does moisture content influence the functional performance of textile structures?

What makes some fibers hold moisture under normal ambient conditions while some other fibers don’t have any inherent moisture in them?

What are some cellulosic fibers? What are some regenerated cellulosic fibers? What are some animal fibers? What are some inorganic fibers?

What are animal fibers such as wool and silk made of?

Cotton and rayon both contain cellulose but their molecular structure is not the same? What is the main difference?

How is wet spinning different from dry spinning? How is solvent spinning different from both wet and dry spinning?

What is an elastomeric fiber and how is it different from a normal synthetic fiber? Give two examples of elastomeric fibers.

What is a bicomponent synthetic fiber? How is it produced?

What are the techniques available to uniquely identify textile fibers?

Which is the lightest synthetic fiber among the commonly known fibers?

What is texturing?

What are the limitations of flat synthetic yarns when it comes to apparel use?

Name the techniques available to create bulk (texture) in synthetic fibers?

What is false twisting?

How do you express the linear density of continuous filament yarn?

Give the sequence of operations for the production of carded cotton yarn.

Give the sequence of operations for the production of combed yarn

What are the functions served by the combing process?

What are the differences in properties between carded and combed yarns?

Answer 1

Nylon 6 is polycaprolactum which is polymer of caprolactum monomer.

Nylon 66 is a poly amide which is polymer with two monomers hexamethylenediamine and adipic acid

Poly ester is a long chain polymers which consists of ester, dihydric alchol and terepthalic acid.

Polypropylene, its a thermoplastic polymer with a monomer of propylene

Polyacrylonitrile is a synthetic resin and vinyl polymer with monomer of acrylonitrile

Structural parameters that characterize the microstructure of a fiber

Polymer architecture and shape

Chain Length

Monomer arrangement in copolymers

Tacticity

Polyethylene, is plastic with monomer of ethylene