ABREX®-E
Combo tester of fingertip abrasion & hand abrasion with two additional scratch tests

Background

To fulfill the BWM GS97034-2 fingernail scratch test and BMW GS97034-3 shoe sole scratch test, a designated model ABREX®-E is supplied to the adequate scratch speeds of 20cm/s for the fingernail PMMA scratch and 70cm/s for the shoe sole scratch respectively.

Together with the standardized leather and SBR discs of both 45 & 55 degrees geometry, ABREX®-E is proven to give repeatable scratch results.

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Description

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

Specification
Specification
standard
ABREX®
ABREX®-EABREX®-AABREX®-DABREX®-C ABREX®-CE
Load1-20N
Friction Path4-40 mm
Standard Cyclic Speed
Abrasion, cleanability tests)
6 ± 0.5 cm/s6 ± 0.5 cm/s (S mode);
20 cm/s (D mode
6 ± 0.5 cm/s
Scratch Speed
(single stroke)
N/A20 ± 2cm/s & 70 ± 5 cm/s acc. to GS97034-2 for fingernail test 70 ± 5 cm/s acc. to GS 97034-3 for shoe sole test. N/A*N/A6 ± 0.5 cm/s20 ± 2cm/s & 70 ± 5 cm/s acc. to GS97034-2 for fingernail test 70 ± 5 cm/s acc. to GS 97034-3 for shoe sole test.
Cycles1-10,000,000
Piston20mm Standard
10mm Standard
20mm Standard
10mm Standard
20mm Standard
10mm Standard
20mm Standard
10mm Standard
both 10mm & 20mm for 3 temperature range: -40-0o C | 0-30o C and 30-85o C both 10mm & 20mm for 3 temperature range: -40-0o C | 0-30o C and 30-85o C
LiquidAutomatic | Manual
FabricAutomatic | Feed Adjustable
Electricity230V / 50Hz; 110V / 60Hz
Compressed Air4 bar, external, oil free, water free
ABREX® can be upgraded to ABREX®-A & ABREX®-D & ABREX®-E respectively.
* ABREX®-A can run both standard abrasion test and special “swiping mode” with test condition of friction
path of 20mm @ 5N @ 2Hz. Other frequency, friction path and load can also be achieved upon request.
Application

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

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Questions?

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