Wet type paper friction material with combined improved friction

Details Wet type paper friction material with combined improved friction Wet type paper friction material with combined improved friction

1999-07-01

2000-09-19

Cole, Elizabeth M.

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Coated or impregnated woven, knit, or nonwoven fabric which...

Coated or impregnated synthetic organic fiber fabric

442101, 442148, 442156, 442161, 442361, 428361, B32B 2702

Patent

active

061211680

ABSTRACT:
A wet paper friction material, mainly used for a slip lock-up of an automatic transmission, obtained by impregnating a paper material with a thermosetting resin, thermosetting, and molding under pressure, to attain compatibility between a good frictional characteristic and good fatigue strength under compression, wherein the paper material, in addition to a cellulose pulp and a filler, contains 30 to 80 wt % of aramid pulp with its drainability being adjusted to 250 to 440 ml in a total amount of pulp, and further contains, as a friction modifier, diatomaceous earth cylindrically formed so as to be net-like in the cylinder part and having its mean length 4 to 6 .mu.m.

REFERENCES:
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patent: 4950530 (1990-08-01), Shibatani
patent: 5083650 (1992-01-01), Seiz et al.
patent: 5676577 (1997-10-01), Lam et al.
patent: 5707905 (1998-01-01), Lam et al.
patent: 5753356 (1998-05-01), Lam et al.
patent: 5775468 (1998-07-01), Lam et al.
patent: 5825244 (1998-10-01), Somayajula
patent: 5827610 (1998-10-01), Ramachandran
patent: 5858883 (1999-01-01), Lam et al.
patent: 5989375 (1999-11-01), Bortz

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