SUBSTRATE FOR LIQUID FILTER AND METHOD FOR PRODUCING THE SAME
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United States of America Patent
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Jun 17, 2015
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Jun 25, 2014
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Abstract
An embodiment of the invention provides a substrate for a liquid filter, the substrate including at least one A layer which is a microporous membrane-like layer containing a polyolefin, and at least one B layer which is a microporous membrane-like layer containing a polyolefin and a filler, the substrate having a bubble point of from 0.40 Mpa to 0.80 Mpa and a water permeation efficiency of from 1.0 mL/min·cm2 to 4.0 mL/min·cm2.
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