Diaphragm and heat exchanger using same

摘要

In order to improve diaphragm flame resistance, a diaphragm (12) layers a reinforcing material (40) and a composite film (30) of a porous polytetrafluoroethylene film (10) and a moisture-permeable resin layer (20), the mass per unit area of the porous polytetrafluoroethylene film (10) being 0.5 g/m to 7 g/m inclusive and the moisture-permeable resin layer (20) containing a moisture-permeable resin and 5 masses to 60 masses inclusive of a fire retardant for every 100 masses of the moisture-permeable resin.