ABREX®-ABRASION, is a soft-chemo-mechanical fingertip & hand abrasion. The simulated wear pattern matches reality with 99% accuracy. It is a highly complex abrasion process which involves:

 • A 45° angle impact driven by a dynamic pneumatic cylinder attached with a viscoelastic fingertip under a defined load;

 • Then a friction rubbing or tumbling motion between the sample and a textile containing dirt, dandruff, oil, sweat or various types of testing liquids;

Followed by a retraction movement with or without the contact at the surface depending on the application.

Basic Principle

With the additional E-box, two scratch tests (speed whether 20 cm/s or 70 cm/s) can be performed manually and scratch resistance can be evaluated with two methods:

 • One stroke with increasing load (2N，4N，6N，8N，10N，15N，20N) until clear scratch appears;

 • Repeating cycles with the same load

ABREX®-E has two separate modes: standard ABREX® and an additional E mode.

Within the standard mode, various tests can be performed according to IEC 68-2-70/DIN 60068.

The additional E mode is designed to comply with BMW GS 97034-2 and GS 97034-3 specifications and can best simulate:

 • Human fingernail scratch which occurs often in the interior parts of the car

 • Shoe sole scratch test which occurs often when the customer entering the car with the unavoidable shoe sole scratch/scuff marks on the driver’s side door and the bottom part of the driver’s seat