Polypropylene is the name of the polypropylene fiber produced in China. This fiber was invented in 1955 by the Italian Natta's, and only entered industrial production in 1960. Among the many synthetic fibers, polypropylene belongs to the “young generation”. 

The specific gravity of polypropylene is only 0.92, which means that clothes made of it can float on water without sinking. Although polypropylene is “frivolous”, but the body is very strong. The biggest advantage of this fiber is abundant raw materials, production is relatively simple, so the cost is low, with the development of value. 

In recent years, with technological progress, people have found that it will be the line density down to 0.2 special below, with a special core absorption effect can be moisture-conducting, with which made of underwear in the sweat will not occur when the skin phenomenon. Many people hope that such underwear should also have good comfort. In fact, the hygroscopicity and moisture conductivity of the fiber is not equivalent. Whether such goods can be accepted by consumers, it remains to be practically verified.