Back to results
US 10,537,856 B2Granted
Hollow fiber membrane and hollow fiber membrane module
AssigneeMitsubishi Chemical Corporation
InventorsNoritaka Shibata, Kenjiro Takayanagi
Life of this patent
Estimating the term…
Abstract
The invention provides a hollow fiber membrane exhibiting a favorable gas permeation performance and an excellent heat resistance in which the generation of pinholes are suppressed, and a hollow fiber membrane module using the same. The hollow fiber membrane comprising a gas permeable nonporous layer; and a porous supporting layer to support the nonporous layer formed of a thermoplastic elastomer having a DSC melting peak temperature of 130° C. or higher and a rupture elongation prescribed in ISO 37 (2010) of 300% or more.
Claims12
A hollow fiber membrane comprising:
- a gas permeable nonporous layer;
- and
- a porous supporting layer to support the nonporous layer,
- wherein:
- the nonporous layer is formed of a thermoplastic elastomer having a DSC melting peak temperature of 130° C. or higher and a rupture elongation prescribed in ISO 37 (2010) of 300% or more,
- the nonporous layer is formed of a composition containing a styrene-based thermoplastic elastomer (I) and a polyolefin (II), wherein the styrene-based thermoplastic elastomer (I) containing at least either of an ABA type styrene-based thermoplastic elastomer (α) having a polystyrene portion (A) and a poly-conjugated diene portion (B) or a hydrogenated product (αh) of the ABA type styrene-based thermoplastic elastomer (α), and
- the composition contains the styrene-based thermoplastic elastomer (I) at 60% by mass or more and 90% by mass or less with respect to a total amount of the styrene-based thermoplastic elastomer (I) and the polyolefin (II), and
- the polyolefin (II) is an unsaturated carboxylic acid-modified polypropylene.
5 more elements
Dependencies are inferred from the claim text.