Wet paper friction material
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United States of America Patent
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Jun 12, 2018
Issued Date -
Jun 8, 2017
app pub date -
Aug 2, 2016
filing date -
Dec 4, 2015
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Abstract
Disclosed herein is a wet paper friction material for vehicles. The wet paper friction material comprises: a matrix containing a hardwood pulp in an amount of about 40 to 50% by weight; a spherical silica in an amount of about 16 to 21% by weight; a friction modifier in an amount of about 5% by weight or less but greater than 0% by weight; and a filler constituting the remaining balance of the wet paper friction material, and all the % by weights are based on the total weight of the wet paper friction material.
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