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US 2021/0197137 A1Published application
Composite semipermeable membrane
AssigneeNitto Denko Corporation
InventorsNagahisa SATO, Masashi ECHIZEN
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Abstract
The present invention relates to a composite semipermeable membrane including: a porous layer; a membrane separation layer provided on the porous layer; and the porous layer contains a crystalline polymer, wherein a crystallinity of the crystalline polymer is 30% or more and 50% or less.
Claims4
A composite semipermeable membrane comprising:
- a substrate;
- a porous layer provided on the substrate;
- a membrane separation layer provided on the porous layer;
- and
- the porous layer contains a crystalline polymer,
- wherein a crystallinity of the crystalline polymer is 30% or more and 50% or less, and
- the membrane separation layer is a polyamide-based membrane separation layer.
4 more elements
Dependencies are inferred from the claim text.