A synthetic fibre is a chain of smallchemical units joined together.Each small unit is called amonomer and the large chainformed of many such monomers iscalled a polymer.
The part poly in the word polymermeans ‘many’ and mer means‘unit’. When a number of singleunits(manomers) are joinedtogether, they form a long chaincalled polymer and the process iscalled polymerisation
Manomers can join either linearly or ina cross-linked way giving scope to theformation of different kinds ofpolymers. When monomers are linearly linked, itis linear polymerisation. When crosslinked it is called cross polymerisation.
Polyester is Although thereare many polyesters, theterm "polyester" as a specificmaterial most commonlyrefers to polyethyleneterephthalate (PET).apolymer of many ester units. Polyester fibers areextremely strong, verydurable, resistant to mostchemicals and do not getwrinkled easily. Does not absorb water sodries quickly.
ACRYLICThis synthetic fibre is often used as a substitutefor wool. It is manufactured as a filament, thencut into short staple lengths similar to woolhair, and spun into yarn. Fabric made fromacrylic is warm to wear, retains its shape and isdurable.• Its fibres are strong and have good wrinkleresistance.• Acrylic is resistant to moths, oils, chemicalsand deterioration on exposure to sunlight.• Acrylic is easy to wash and dries quickly.
Acrylic is lightweight, soft, and warm, with a wool-likefeel. It can also be made to mimic other fibers, such ascotton, when spun on short staple equipment. Someacrylic is extruded in colored or pigmented form; other isextruded in "ecru", otherwise known as "natural," "rawwhite," or "undyed." Pigmented fiber has highest light-fastness. Its fibers are very resilient compared to bothother synthetics and natural fibers. Some acrylic is usedin clothing as a less expensive alternative tocashmere, due to the similar feeling of the materials.Some acrylic fabrics may fuzz or pill easily. Other fibersand fabrics are designed to minimize pilling. Acrylictakes color well, is washable, and is generallyhypoallergenic. End-uses include