<P> Synthetic fibers account for about half of all fiber usage, with applications in every field of fiber and textile technology . Although many classes of fiber based on synthetic polymers have been evaluated as potentially valuable commercial products, four of them - nylon, polyester, acrylic and polyolefin - dominate the market . These four account for approximately 98 percent by volume of synthetic fiber production, with polyester alone accounting for around 60 per cent . </P> <P> There are several methods of manufacturing synthetic fibers but the most common is the Melt - Spinning Process . It involves heating the fiber until it begins to melt, then you must draw out the melt with tweezers as quickly as possible . The next step would be to draw the molecules by aligning them in a parallel arrangement . This brings the fibers closer together and allows them to crystallize and orient . Lastly, is Heat - Setting . This utilizes heat to permeate the shape / dimensions of the fabrics made from heat - sensitive fibers . </P> <P> Synthetic fibers are more durable than most natural fibers and will readily pick - up different dyes . In addition, many synthetic fibers offer consumer - friendly functions such as stretching, waterproofing and stain resistance . Sunlight, moisture, and oils from human skin cause all fibers to break down and wear away . Natural fibers tend to be much more sensitive than synthetic blends . This is mainly because natural products are biodegradable . Natural fibers are susceptible to larval insect infestation; synthetic fibers are not a good food source for fabric - damaging insects . </P> <P> Compared to natural fibers, many synthetic fibers are more water resistant and stain resistant . Some are even specially enhanced to withstand damage from water or stains . Some fabrics are also designed to stretch in specific ways, which makes them more comfortable to wear . </P>

State any two advantage of using synthetic fibre