Polypropylene staple fiber is a synthetic textile material made from polypropylene polymer. It is produced by cutting continuous polypropylene filaments into shorter lengths, creating staple fibers. These fibers can then be spun into yarns and used in various applications such as textiles, nonwoven fabrics, and more.

Key characteristics of polypropylene staple fiber include:

1. Durability: Polypropylene fibers are known for their strength and resistance to wear and tear. They have a high melting point, making them suitable for applications requiring heat resistance.

2. Lightweight: Polypropylene fibers are lightweight, which makes them ideal for use in lightweight fabrics and materials.

3. Moisture Resistance: Polypropylene is hydrophobic, meaning it repels water. This property makes polypropylene staple fiber suitable for use in outdoor textiles and applications where moisture resistance is essential.

4. Chemical Resistance: Polypropylene is resistant to many chemicals, making it suitable for use in environments where exposure to chemicals is a concern.

5. Non-allergenic: It is non-allergenic and is often used in products intended for sensitive skin.

6. Recyclability: Polypropylene is recyclable, contributing to its eco-friendliness in certain applications.

Common uses of polypropylene staple fiber include in the production of carpets, upholstery, geotextiles, hygiene products (like diapers and sanitary napkins), and various industrial applications where durability and moisture resistance are essential.