Text: (WO2022138100)
1. A substrate for an alkaline water electrolytic diaphragm comprising a non-woven fabric containing polyphenylene sulfide fibers and having a different cross section, wherein the substrate has a density of 0.30 g/cm3 or more and 0.80 g/cm3 or less, and a tensile elongation in both a longitudinal direction and a lateral direction of 10% or more and 35% or less.
2. The substrate for an alkaline water electrolytic diaphragm according to claim 1, wherein the non-woven fabric contains drawn polyphenylene sulfide fibers and undrawn polyphenylene sulfide fibers.
3. The substrate for alkaline water electrolytic diaphragm according to claim 1 or 2, wherein the non-woven fabric is manufactured by a wet papermaking method.
4. The substrate for alkaline water electrolytic diaphragm according to any one of claims 1 to 3, wherein the substrate comprises a non-woven fabric with a single-layer structure or a non-woven fabric with a multi-layer structure.
5. An alkaline water electrolytic diaphragm comprising: the substrate for alkaline water electrolytic diaphragm according to any one of claims 1 to 4; and a porous membrane of polymer resin. SUMMARIZE ABOVE TEXT Provide your reponse without using the word polyphenylene.
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