Description
Send Inquiry
Material Characteristics and Working Principles
Waterproof PU Film achieves the unification of contradictory properties through molecular structure design:
- Microporous Moisture Permeability: 0.1-5μm pore structure blocks liquid water (droplet diameter: 20-100μm) while allowing water vapor (0.0004μm) to pass through freely.
- Mechanical Performance:waterproof pu film Tensile strength reaches 30-50MPa, maintaining elasticity at -30°C, breaking the brittleness limitations of traditional waterproof materials.
- Eco-Friendly Upgrades: Bio-based PU derived from castor oil achieves 85% lab-stage degradation efficiency.
Production Process Flow
Base fabric cleaning → PU/DMF solution coating → Phase separation in water bath → Multi-stage washing → Infrared shaping
Key parameter controls:
- DMF concentration in coagulation bath: 25±0.5wt%
- Gradient drying temperature control (50℃→80℃→110℃)
Industry Applications
Outdoor Sports Gear
Three-layer composite structure for shell jackets: Outer Wear-resistant layer/PU film/Inner lining
- Waterproof lining for hiking shoes, moisture permeability ≥8000g/m²/24h
Medical Protective Equipment
- Surgical gown materials certified to EN13795, bacterial barrier rate >99%
Building Waterproofing Systems
- Reinforcement layer for roofing membranes, weather-resistant lifespan up to 15 years
Technological Development Trends
Smart Responsive Film
Pore size self-adjustment triggered by temperature/pH
Nanofiber Composite Film
Electrospinning technology boosts moisture permeability by 30%
Hot Tags: waterproof pu film, China waterproof pu film manufacturers, suppliers, factory, Polyurethane Adhesive Film, Waterproof Pu Film, pu film, Polyurethane Film Roll, Pu Film Medical
