What is airbag film

Airbag Membrane: Functional Composite for Adaptive Structures
An airbag membrane is a composite material system combining elastic membranes (rubber, nylon, or polyester) with rigid frameworks to form pressurized enclosures. Its core mechanism utilizes elastic pressure transmission to create lightweight yet high-strength structures, extensively applied in construction, industry, packaging, safety systems, and recreational equipment. Below is a detailed technical exposition:

I. Technical Principles & Structural Configuration

1. Elastic-Rigid Hybrid Design
   The system typically comprises an elastic membrane (e.g., rubber bladder) and rigid mold. Upon inflation, the elastic membrane evenly distributes pressure across laminated substrates, ensuring precise surface geometry at mold interfaces while tolerating dimensional variances at membrane-contact zones. This design optimizes structural stability while reducing manufacturing costs.

2. Pneumatic Forming Mechanism
   Controlled inflation with compressed air/inert gas enables shape programming of the membrane. For instance, automotive airbag membranes utilize nylon 66 or polyester fibers, connecting inflation ports to pyrotechnic gas generators for rapid (<30ms) deployment with precise geometric control.

II. Key Performance Characteristics

1. Lightweight & High-Strength
   Airbag membranes achieve exceptional strength-to-weight ratios:

• ETFE pneumatic cushions: 0.15-0.35kg/m&sup2; with 50MPa tensile strength
• Nylon airbag films: Compliance with FMVSS 208 automotive safety standards
  Maintain structural integrity under extreme loads (e.g., 3-5kPa wind/snow loads).

2. Weather Resistance & Durability

• ETFE membranes: 25-35-year service life with UV/chemical resistance (≤5% transmittance loss over decades)
• PVC membranes: Impermeable and corrosion-resistant for flood control applications (water pressure resistance ≥10kPa)

3. Adaptive Pressure Regulation
   Intelligent pressure modulation enables real-time load adaptation:

• ETFE cushions: Automatic internal pressure adjustment (±15%) responding to wind/snow loading
• Bouncing Cloud systems: Pneumatic control maintains 0.5-1.5kPa operating pressure for customizable curvature (arc radius 2-8m)