Blister protection for spirally wound elements of semipermeable membrane sheet material
A method for preventing osmotic blistering in spirally-wound elements of semipermeable membrane sheet material in locations otherwise subject thereto is disclosed, wherein the method comprises the step of: applying a sealant to the upstream surface of the membrane sheet material in locations where t...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A method for preventing osmotic blistering in spirally-wound elements of semipermeable membrane sheet material in locations otherwise subject thereto is disclosed, wherein the method comprises the step of: applying a sealant to the upstream surface of the membrane sheet material in locations where the downstream surface thereof has been so treated that flow there-through is prevented, which sealant prevents liquid from permeating into the membrane in such regions and potentially resulting in osmotic blistering. |
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