Title:
SEMIPERMEABLE MEMBRANE SUPPORT BODY
Document Type and Number:
Japanese Patent JP2021146248
Kind Code:
A
Abstract:
To provide a semipermeable membrane support body that can suppress contraction after the membrane is coated to form a uniform semipermeable membrane that is not curled.SOLUTION: A semipermeable membrane support body includes a main body fiber and a binder fiber made of a synthetic fiber, and has a two-layer structure constituted of a layer on a semipermeable membrane forming face side and a layer on a semipermeable membrane non-forming face side. An average thermal shrinkage ratio of the main body fiber in the layer on the semipermeable membrane non-forming face side is 1.3-3.0 times an average thermal shrinkage ratio of the main body fiber in the layer on the semipermeable membrane forming face side. It is preferable that an average of floating heights of four corners of the semipermeable membrane support body, which is cut out into a size of 10 cm times 10 cm, is still placed horizontally on a flat base, and is subjected to humidity conditioning for 24 hours under the condition of 23°C and 50% R.H. is in a range of 5-20 nm.SELECTED DRAWING: None
Inventors:
SHIMIZU YUSUKE
OCHIAI TAKAHITO
MASUDA TAKAO
OCHIAI TAKAHITO
MASUDA TAKAO
Application Number:
JP2020046879A
Publication Date:
September 27, 2021
Filing Date:
March 17, 2020
Export Citation:
Assignee:
MITSUBISHI PAPER MILLS LTD
International Classes:
B01D69/10; D21H13/24; D21H27/00