PTFE Compression Molding Process

PTFE powder is loaded into molds, cold-pressed (20–50 MPa), and sintered at high temperatures (360–380°C) to form dense preforms, enabling production of complex-shaped components (e.g., flange gaskets, custom valve seats).  

Advantages 

  • High-density homogeneity (2.15–2.20 g/cm³, porosity <0.5%)  
  • Batch production efficiency (3–5x faster than machining)  
  • Near-net shape forming (material utilization >98%)  
  • Customizable properties (e.g., glass fiber/graphite fillers reduce friction to 0.08) 

 

Typical Products 

  • High-pressure flange gaskets (30 MPa resistance)  
  • Acid-resistant valve cores (withstands 98% sulfuric acid)  
  • High-frequency substrates (dielectric loss <0.0002)  
  • Artificial vascular membranes (thickness 0.05 mm ±0.005)