Polypropylene non-woven fabric is a non-woven fabric material made primarily from polypropylene (PP) through processes such as meltblowing, spunbonding, or hot-calendering. Its core characteristic is that it eliminates the warp and weft weaving required in traditional textile production, instead forming a network structure through the physical or chemical bonding of fibers. The following is a multi-dimensional analysis:
Technical Principle:
Raw Material: Polypropylene granules are melt-extruded and then stretched by a high-speed airflow into ultrafine fibers (1-5 microns in diameter), which are then randomly deposited into a web.
Process: Mainstream processes include spunbonding (long fibers, high strength), meltblowing (ultrafine fibers, excellent filterability), and hot-calendering (bonding through heat and pressure).
Features:
Lightweight: Weights range from 10-200 g/m², with a density of only 0.91 g/cm³.
Chemical Resistance: Resistant to acids, alkalis, and organic solvents (stable at pH 2-12).
Breathability: Porosity as high as 80%-95%, moisture permeability ≥ 1000 g/m²/24h (GB/T 12704 standard).
Applications:
Medical: Surgical gowns, masks (meltblown fabric BFE ≥ 95%).
Industrial: Filter materials (capable of intercepting 0.1μm particles), geotextiles (breaking strength ≥ 20kN/m).
Daily Use: Shopping bags (load-bearing capacity 5-10kg), wet wipes substrates.
Industry Standards:
China: GB/T 17638-2017 (geotextiles), YY/T 0691-2008 (medical).
International: ISO 9073 series (non-woven fabric test methods).
Precautions:
Avoid prolonged exposure to UV rays (adding a UV-resistant masterbatch can extend the lifespan). The hot rolling process requires a controlled temperature of 160-180°C (higher temperatures can lead to brittleness). We currently offer related products, such as cooling masterbatches, which significantly improve PP processing fluidity and reduce processing temperatures by 10-15°C. These masterbatches are suitable for melt extrusion in nonwoven fabric production. Please contact us for optimal solutions.