Composite hollow fiber membrane and hollow fiber membrane module
AssigneeMitsubishi Rayon Co., Ltd.
InventorNoritaka Shibata
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Abstract
This composite hollow fiber membrane comprises a gas-permeable non-porous homogeneous layer which has a polyolefin resin (A) as the main component and a porous support layer which is made of a polyolefin resin (B) and which supports said non-porous homogeneous layer, and the composite hollow fiber membrane is characterized in that the polyolefin resin (A) of non-porous homogeneous layer is a block copolymer of ethylene units and at least one type of olefin unit selected from α-olefin units having a carbon number of 3-20. By this means, a gas-permeable composite hollow fiber membrane is provided which has good gas permeability, reduces the impact of condensate on the performance of a gas dissolving module, and has excellent elution properties.
Claims10
A composite hollow fiber membrane comprising:
- a non-porous homogeneous layer that is gas permeable comprising a polyolefin resin A in an amount of at least 90% by mass;
- and a porous support layer comprising a polyolefin resin B in an amount of at least 90% by mass that supports the non-porous homogenous layer, wherein the polyolefin resin A of the non-porous homogeneous layer is a block copolymer of ethylene units and at least one type of olefin units selected from C3 to C20 α-olefin units,
- wherein the polyolefin resin A of the non-porous homogeneous layer has a melting point of at least 100° C. to no higher than 135° C.
Dependencies are inferred from the claim text.