Wet paper friction material

Patent metadata

Field	Value
Publication number	US-9995003-B2
Application number	US-201615226298-A
Country	US
Kind code	B2
Filing date	Aug 2, 2016
Priority date	Dec 4, 2015
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

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.

First claim

What is claimed is:

1. A wet paper friction material for vehicles, comprising:
a matrix comprising 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,
all the % by weights are based on the total weight of the wet paper friction material,
wherein the spherical silica has a diameter of about 10 μm or less, and is arranged in parallel on surface of the matrix to form a uniform oil film.

2. The wet paper friction material of claim 1 , wherein the matrix further comprises aramid fiber.

3. The wet paper friction material of claim 1 , wherein the friction modifier comprises cokes, graphite, or both.

4. The wet paper friction material of claim 1 , wherein the filler is diatomite.

5. The wet paper friction material for vehicles of claim 1 , consisting essentially of:
a matrix comprising 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,
all the % by weights are based on the total weight of the wet paper friction material,
wherein the spherical silica has a diameter of about 10 μm or less, and is arranged in parallel on surface of the matrix to form a uniform oil film.

6. A vehicle part comprising a wet paper friction material of claim 1 .

7. The vehicle part of claim 6 comprising a clutch part.

Assignees

• Hyundai Motor Co Ltd
• Jinmyung Frictech Co Ltd

Inventors

• Kim Yoon Cheol
• Kim Seong Jin
• Cho Eun Pa
• Oh Young Taek
• Hong Sung Jin

Classifications

• F16D2200/0095

  Mixing an aqueous slurry of fibres with a binder, e.g. papermaking process · CPC title

• F16D2200/0034

  non-metallic · CPC title

• F16D69/026

  containing fibres · CPC title

• F16D69/02 Primary

  Composition of linings {; Methods of manufacturing} · CPC title

• F16D13/60

  Clutching elements (friction lining or attachment thereof F16D69/00) · CPC title