Advantages
Powdered Nitrile Butadiene Rubber(PNBR) has good bonding effect,can increase the adhesive ability of friction material system.It can improve the impact strength of pressure embryo,and provide product flexibility.So PNBR is the ideal friction material modifier,mainly used for brake pad,train brake shoe,motorcycle and other fields.The main function and effect as following:
1.Modify phenolic resin,increase its flexibility and improve the frictional properties,thereby obtain high and stable coefficient of friction.
2.Add powdered NBR in friction materials can make rubber powder particles uniformly distributed in the mixed materials,thereby reduce the abrasion of the friction material.
3.Powdered NBR has good toughening effect as the elastomer,can increase the impact strength of friction materials.
4.PNBR can reduce products hardness and braking noise to improve braking comfort.
Index name
Appearance
Mooney Viscosity
Bound Acrylonitrile
Gel Content
Volatile
Sieving Rate
Main field application
Measurement Unit
—
ML100℃1+4
%
%
%
%
Test Condition
—
—
—
—
105±5℃
120min
Standard380μm
Top-grade180μm
Special-grade150μm
PNBR-03
White or yellowish powder
100~150
35~40
≥90
≤1.0
≥98
Disk, drum brake pad, Clutch heading, grinding wheel, Abrasives, Train brake shoe and so on
PNBR-04
≥150
35~40
≥95
≤1.0
≥98
PNBR-05
50~100
30~35
≥80
≤1.0
≥98
Applications
It's used for friction material such as disk,drum brake pad,clutch heading,grinding wheel,abrasives,train brake shoe and so on.