1. Physical Properties: High Strength, Low Loss

High Strength & High Modulus: Polypropylene's inherent tensile strength surpasses polyester and nylon (particularly maintaining strength in wet conditions without weakening when exposed to water). Twisting further compacts the yarn structure, enhancing tensile resistance and impact resistance. It resists breakage or deformation, making it ideal for load-bearing applications (e.g., ropes, netting).

Low Density (Lightweight): Polypropylene boasts the lowest density among existing synthetic fibers (density only 0.91 g/cm³, less than water). Twisted yarn products are “lightweight without brittleness,” covering a larger area for the same weight. They feel weightless during wear or use, making them ideal for sportswear and outdoor gear.

2. Chemical Stability: Corrosion Resistance, Weather Resistance, Aging Resistance

Chemical Corrosion Resistance: Exhibits strong stability against acids (e.g., hydrochloric acid, sulfuric acid), alkalis (e.g., sodium hydroxide), salt solutions, and most organic solvents (e.g., alcohol, gasoline). Twisted yarns create tighter gaps, making chemical penetration difficult. Suitable for chemical filtration fabrics and protective materials in electroplating industries.

Superior weather resistance: Excellent UV and ozone resistance (outperforming nylon). Resists brittleness, fading, or strength loss during prolonged outdoor exposure. Suitable for outdoor sunshades, tent fabrics, and fencing.

3. Moisture Absorption & Breathability: Dry & Non-Stifling

Extremely low moisture absorption: Polypropylene has a moisture regain rate of only 0.03% (virtually water-repellent). Twisted yarns won't gain weight, harden, or mold due to moisture absorption. Water easily evaporates from the surface, enabling rapid drying. Ideal for intimate apparel like sports bras, quick-dry socks, and swimwear to prevent dampness and stuffiness.

Breathable and sweat-wicking: The twisting process creates microscopic pores within the yarn. Combined with polypropylene's inherent hydrophobicity, this ensures excellent airflow. This reduces stuffiness during wear, making it especially suitable for summer fabrics.