Parameter control of membrane material welding and heat sealing process in membrane structures

The quality of membrane welding heat sealing depends on the coordinated control of temperature, pressure, and time parameters.

Temperature Control:
PVC membrane: Heat sealing temperature range 95℃-205℃, needs adjustment according to coating type.

PTFE/ETFE membrane: Requires heating to near the melting point.

Temperature Monitoring: Use a thermometer or thermocouple for real-time feedback to avoid overheating and membrane carbonization.

Pressure Control:
Pressure Range: Needs adjustment according to membrane thickness.

Pressure Distribution: Use a pneumatic or hydraulic pressurization system to ensure uniform pressure distribution to the welding surface.

Time Control:
Welding Time: Needs adjustment according to membrane thickness.

Cooling Time: Allows for natural cooling after welding to avoid cracking due to thermal expansion and contraction.

Overlap Width:
G-type membrane (PTFE): Overlap width not less than 50mm.

P-type membrane (PVC): Overlap width not less than 25mm.

E-type membrane (ETFE): Overlap width not less than 10mm.