Characteristics of polypropylene hollow yarn: the biggest advantage of polypropylene yarn is its light weight, its density is only 0.91g/cm3.

High strength: the relative strength can reach 3-7.5g/d, the clothes made of polypropylene yarn are firm and durable, and at the same time, it is suitable for the industrial use which requires high strength. 

Good elasticity: the resilience of polypropylene yarn can reach 90-100%.

Poor light and heat stability: the main defect in the performance of polypropylene yarn is the poor light and heat stability, easy to aging, but after the domestic and foreign scientists and technicians of the research and testing, this problem has been solved.