Spiral filtration module with strengthened membrane leaves and method of constructing same

摘要: The subject of the present invention is an improved leaf packet useful in forming a spiral filtration module, module which results from utilization and method preparing packet. membrane sheet utilized fused densified area its fold to increase density this thus provide protection against mechanical failure. densification includes application heat pressure surface so as densify seal it penetration feed stream liquid while also densifying membrane, backing optional reinforcing strip (if utilized).