Porous membrane, porous membrane laminate, and method of manufacturing porous membrane
AssigneesSumitomo Electric Fine Polymer, Inc., Sumitomo Electric Industries, Ltd.
InventorsHirokazu KATAYAMA, Atsushi FUKUNAGA, Takamasa HASHIMOTO, Kanako CHINO, Hiroyuki TSUJIWAKI
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Abstract
A porous membrane according to the present disclosure includes polytetrafluoroethylene as a main component, wherein a melting curve obtained in a first run of differential scanning calorimetry at a rate of temperature increase of 10° C./min has an endothermic peak in a range of 300° C. to 360° C., and a difference between an onset temperature and an endset temperature of the endothermic peak is 20° C. or less.
Claims10
A porous membrane comprising polytetrafluoroethylene as a main component,
- wherein a melting curve obtained in a first run of differential scanning calorimetry at a rate of temperature increase of 10° C./min has an endothermic peak in a range of 300° C. to 360° C., and
- a difference between an onset temperature and an endset temperature of the endothermic peak is 20° C. or less.
A method of manufacturing a porous membrane, the method comprising molding a kneaded product of a powder of polytetrafluoroethylene and a liquid lubricant, wherein a difference between a maximum particle size and a minimum particle size in a primary particle size of the polytetrafluoroethylene is 200 nm or less.
Dependencies are inferred from the claim text.