﻿Friction - Lapinus

40% of European citizens experience annoyance from road traffic noise above 55 dB(A)


Up to 55% of non-exhaust traffic related PM10 emissions in urban environments is caused by brake wear


In 2030, the share of electric vehicles is expected to rise up to 50% of new-vehicle sales


Anchoring Effect

The Anchoring Effect has a positive influence on the friction level:

more anchoring points means a bigger contact area, resulting in enhanced friction level. If managed properly in the formulation, the advantage of having many secondary plateaus results in a less abrasive formulation and a reduction of wear and
vibrations. The best Anchoring effect is achieved by using short fibres that are optimally distributed in the friction matrix.



Mineral fibres can contribute in two ways to reduce the propagation of vibrations:

1. Reducing the generation of vibrations with long fibres through the Reservoir Effect
2. Mineral fibres coated with rubber contribute to the damping properties of the friction material

Both mechanisms result in an improved NVH performance.


Reservoir Effect

The Reservoir Effect has a positive influence

on friction level stability, wear and noise reduction.


Surface Reinforcement

There are two key ways in which mineral fibres can improve disc pad surface reinforcement by:

1. Working as an anchor to keep all the functions working on the surface;
2. Generating porosities that accumulate other raw materials in the surface, allowing them to work for a longer period of time.



Different surface treatments must be used for different binding systems.

For phenolic resin-based formulations, amino-silane coupling agents are good compatibilisers.


Porosity Contribution

Fibre length, fibre coating, shot content and fibre diameter

are relevant parameters contributing to the generation of porosity.

Lapinus Mineral Fibres

The way any raw material functions in a friction formulation is defined by two main characteristics, Chemical composition and Morphology. The chemistry of our mineral fibres is engineered to be bio-soluble and make the fibres stable, even under extreme conditions like high temperatures (1100°C) or acid and alkaline environments. Our mineral fibres have a high-aspect ratio morphology. They play an important role in reinforcing the surface of a brake pad. Next to that our mineral fibres have a direct effect on the tribology of the friction material by playing an active role in the third body layer formation.


Promaxon D Calcium Silicates

Promaxon-D has a unique spherical shape and has a very porous morphology due to its needled structure cavity. This allows compounders to use Promaxon-D to control the porosity of their formulation. The chemical composition of Promaxon-D is able to withstand very high temperatures (1500°C) enabling Promaxon-D to play an important role in the third body layer. When our mineral fibres interact with Promaxon-D, friction levels are stabilized and NVH performance improved. Promaxon-D is produced by Promat International N.V. and is exclusive represented by Lapinus in the friction industry.

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