Physical properties：

5. Moisture absorption and dyeing properties: light texture, good warmth retention. Polypropylene fiber is almost non hygroscopic, but its wicking ability is strong and its moisture absorption and sweat wicking effect is obvious. Polypropylene has very low moisture absorption, almost no moisture absorption, and its moisture regain under general atmospheric conditions is close to zero. But it has a wicking effect and can transmit water vapor through capillaries in the fabric, but it itself does not have any absorption effect. Polypropylene fiber has poor dyeing properties and incomplete chromatography, but the original solution coloring method can be used to compensate for the shortcomings.

6. Light resistance: Polypropylene has poor light resistance and thermal stability, is prone to aging, and is not resistant to ironing. However, the anti-aging property can be improved by adding anti-aging agent during spinning. In addition, polypropylene has good electrical insulation, but it is prone to generating static electricity during processing. Due to the small thermal conductivity of polypropylene fiber, it has good warmth retention.

7. High strength: Polypropylene elastic yarn has a strength second only to nylon, but its price is only 1/3 that of nylon; The made fabric has stable size, good wear resistance and elasticity, and good chemical stability. However, it has poor thermal stability, is not resistant to sunlight, and is prone to aging and brittle damage. Therefore, anti-aging agents are often added to polypropylene fibers.