Construction technology of two cloths one membrane, and the connective way of two cloth one membrane edges. ① membrane and membrane's welding, non-woven cloth seams, seams film is departed with the cloth, it can't be synchronizely stressed, seam strength is 20-40% of the base materials, the connective way of two cloths film one film edges. ① membrane and membrane's welding, non-woven fabrics' seams, seam film is departed from the cloth, and can't stand synchronized force.
