Patent ID: 8142657

Claim:
A method for fabricating a spiral wound module comprising: a. providing a generally rectangular membrane envelope comprising an open envelope edge and three envelope edges sealed with an adhesive that achieves a viscosity of at least 200,000 cps after at least 20 minutes from application; b. positioning the open envelope edge relative to a permeate collection tube having holes so that the open envelope edge is in fluid communication with a plurality of the holes; c. positioning a feed spacer sheet adjacent to the membrane envelope; d. winding the membrane envelope and adjacent feed spacer sheet about the permeate collection tube to form a wound membrane scroll having two spaced-apart scroll faces, each face being generally perpendicular to the permeate collection tube; e. applying a circumferential bead of reactive sealant material having an initial viscosity of less than about 10,000 cps to the module at location between the permeate collection tube and a scroll face; and f. curing the reactive sealant material to a viscosity of at least 200,000 cps in less than one minute.