Liquid separation device, flow channel material and production method thereof

摘要

To provide a liquid separation device capable of suppressing the lowering of filtration function due to an increase in flow channel resistance of permeated liquid resulting from that a separation membrane falls in a groove of a permeated liquid flow channel material, and breakage of the separation membrane surface accompanied thereby, a permeated liquid flow channel material disposed on the back side of a separation membrane is composed of a sheet-like material that a linear groove and a linear crest are alternately arrayed on one surface or both surfaces, wherein a groove width of the linear groove in the sheet-like material is 10 to 200 µm, and a ratio of the groove width of the linear groove to the pitch of the linear groove is 0.45 or more.