Spiral membrane element and method for producing the same
AssigneeNitto Denko Corporation
InventorsYasuhiro UDA, Shinichi CHIKURA, Maya KIHARA, Seigo OGAWA
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Abstract
A spiral membrane element includes: a plurality of membrane leaves each having a permeation-side spacer interposed between separation membranes facing each other and having both-side sealing parts and a peripheral-side end that seal both-side ends in an axial direction; a supply-side spacer interposed between the membrane leaves; and a perforated central pipe around which the membrane leaves and the supply-side spacers are wound, wherein a folded part of an inner surface of each of the membrane leaves and a peripheral-side tip of the permeation-side spacer are not fixed to each other in at least one the peripheral-side end.
Claims10
A spiral membrane element comprising:
- a plurality of membrane leaves each having a permeation-side spacer interposed between separation membranes facing each other and having both-side sealing parts and a peripheral-side end that seal both-side ends in an axial direction;
- a supply-side spacer interposed between the membrane leaves;
- and
- a perforated central pipe around which the membrane leaves and the supply-side spacers are wound,
- wherein a folded part of an inner surface of each of the membrane leaves and a peripheral-side tip of the permeation-side spacer are not fixed to each other in at least one the peripheral-side end.
Dependencies are inferred from the claim text.