ePTFE Membrane Lamination Processes
topic
Expanded PTFE membrane lamination bonds the stretched, microporous PTFE membrane with 0.1 to 10 micrometre pores to face and backer textiles using polyurethane adhesive in dot or web patterns at 3 to 15 grams per square metre, with adhesive coverage typically 10 to 25 percent of membrane area to preserve the hydrostatic pressure resistance above 20000 millimetres water column and water vapour transmission above 10000 grams per square metre per day that make ePTFE the premium waterproof breathable membrane.
Role
Produces the highest-performance waterproof breathable laminates using ePTFE membranes whose combination of extreme hydrostatic resistance from the PTFE surface chemistry and high breathability from interconnected micropore structure defines the performance ceiling of the waterproof breathable textile category, with lamination process design being critical for preserving membrane performance through the adhesive pattern coverage that must bond the laminate without blocking the membrane pores.