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Importance of Durability Tests on Displays
Over the decades, the touch design has been changing from the simple button/knob to a display, either non-interactive or interactive touchscreen. Since 2012, OEMs in various industries start to install touchscreens into their product. ABREX®-D is designed for display durability testing.
Visible defects
Scratches and fingerprints can easily appear due to normal usage.
Scratches can be easily made under dynamic motion of human being.
Fingerprint or dirt print is another issue; either easily removed by a few cleaning steps or certain anti-fingerprint coatings are applied to prevent those imprints.
Customer will not return or exchange the display due to those defects, but instead, the complete product.
Non-visible defects
Current display or touchscreen has various functional layers of coatings, and they are transparent (not visible to human eye)
Abrasion is often caused by human finger touch/ swipe/ zoom actions and other mechanical loads.
Layers of functional coatings could be damaged without the visibility of human eye.
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Displays are nowadays widely integrated into various consumer products:
Automotive
car, truck, bike, motorcycle
Telecommunication
mobile phone, pad, watch, E-book
White goods
refrigerator, washing machine, dish washer, stove
Small Electronics and many more
Principle
The quality issue with the display will lead to the return of the consumer products instead of the disply itself. Therefore, the following mechanical, durability and optical aspects have to be tested with the right tool:
IEC 68-2-70 /DIN EN 60068-2-70: Environmental testing – Part 2: Tests – Test Xb: Abrasion of markings and letterings caused by rubbing of fingers and hands-Abrex
VDE SPEC 90017 V1.0 – Durability and functionality testing of displays or surfaces, materials or products in the vicinity of the display.
ASD-Stan
prEN 4860: Aerospace series — Environmental testing — Test Xb: Abrasion of markings, letterings, sur-faces and materials caused by rubbing of fin-gertips and hands
DFF
DFF Top Surface Durability Specification Spec V1_0
OEM-Specs
BMW GS97034-1: Surface test of motor vehicle interior materials – Manual abrasion test
BMW GS97034-2: Surface test of motor vehicle interior materials, Finger nail test
BMW GS97034-3: Surface test of motor vehicle interior materials – Shoe sole test
BMW GS97034-4: Surface test of motor vehicle interior materials – Color abrasion behaviour (Test procedure A: Abrex method)
BMW GS97034-5: Surface test of motor vehicle interior materials – Resistance to cleaning agents (Test procedure A: – Abrex method)
BMW GS97034-6: Surface test of motor vehicle interior materials, soiling behavior and cleaning ability (Test proce-dure A: Abrex method)
BMW PA-P 315: Abrasion Resistance (dry + test media according to BMW AA-P 077)
BMW AA-0471: Abrasion Resistance
BMW AA-P 296: Abrasion resistance (dry + test media acc. to GS 97045)
PSA D24 5020: Coatings for decorative interior plastic components – Abrasion resistance – Abrex Test Method
Daimler DBL 7384: For coated plastic parts used in the interior of vehicles.
Daimler DBL 9202: For decorative parts used in the interior of pas-senger car compartment
Ford WSS-M2P188-A1/FLTM BN155-01/: Surface test of motor vehicle interior materials – Shoe sole test
Renault: Abrasion Resistance using the ABREX Test Equipment
Other
GB-T 2423.53: Environmental testing – Part 2: Tests – Test Xb: Abrasion of markings and letterings caused by rubbing of fingers and hands
JIS C 60068-2-70: Environmental testing – Part 2: Tests – Test Xb: Abrasion of markings and letterings caused by rubbing of fingers and hands
EWIMA: Abrasion Resistance using the ABREX Test Equipment
GSO 480.1.003: Abrasion test using the ABREX Test Equipment
GEBERIT (PA100134): Requirements for pad printing using the ABREX Test Equipment
many others (Miele, Swarovski, BSH, ECB, Audi, Man, etc.)
Modules
Dynamic Fingernail Test Module
Performing fingernail scratch test
Supplied with the PMMA test disc
Additional 45° sample holder
Test path: 60 mm – 100 mm
Test load: up to 20 N
Dynamic Fingernail Test Module - Industrial
Performing industrial scratch test
The test tip (PVC, sharpened edge)
Scratch test under either 45° or 90° relatively to the test sample
Test path: 60 mm – 100 mm
Test load: up to 20 N
Dynamic shoe sole Test Module
Performing shoe sole scratch test on painted, coated, uncoated and laminated surface
Leather and SBR test disc
Additional 45° sample holder
Test path: 60 mm – 100 mm
Test load: up to 20 N
Fingerprint and Cleanability Test (BMW PR 506)
Affinity and cleanability property
Glossy piano paints and touchscreens, etc.
40mm fingerprint piston
Test gel or sebum
Microfiber or wool felt
Image processing toolkit
Steering Wheel hand Abrasion Test
A complete car or truck steering wheel is mounted directly on ABREX®
No cutting for the lab samples
Feasible with an additional mobile 3D profilometer TRACEiT® for further measurement
e.g. abrasion rate and surface roughness, topography and visual impression
Banknote Durability Test
Specially designed sample mounting adapter
Certain curvature for easy banknote fixing
Test with standard fabric, soiling fabric
Dry and wet condition
Banknote Limpness Test
Limpness is referred as the banknote paper is less stiff due to the frequent handling
Normally correlates with soiling and structural deterioration, which results in a marded lack of stiffness
Specially designed adapter
Simulation the limpness abrasion between the banknotes and human hands
Teeth Abrasion Test
Specially designed adapter
Durability test of tooth replacement materials
Abrasion counterpart can be customized.
Consumables
・Textile Options
Standard Fabric:
Simulates ABREX®-abrasion according to DIN EN 60068-2-70 / IEC 68-2-70
Standard Textile Fine Wool:
Used for ABREX testing on thin and/or brittle coatings, touchscreen applications, etc.
Standard wool sebum textile
Used for ABREX Display and Touchscreen testing acc. to DFF Spec Touch, Swipe, Zoom etc.
Cotton-Batist Fabric (Denim):
Simulates abrasion with clothing materials (e.g. jeans) according to ISO 105 D01
Cotton-Lawn Fabric:
Simulates abrasion with fine-structured clothing materials (e.g. trouser pockets) acc. to ISO 405 F09
Soiling Fabric:
Simulates soiling behaviour with standard materials (by fats, soot) acc. to BMW GS 97034 and various standards. Two types of soiling fabric are available.
Standardized soiling textile fine
Simulates soiling behaviour with standard materials (fats, soot) acc. to BMW GS97034, GS-94011 for interior parts including displays and touch screen application and other specifications.
Abrasion-Pad “Scrub test”:
Simulates mechanical wear by kitchen and cleaning sponges (M44)
Abrasion-Pad S-1000:
Simulates mechanical abrasion with high-abrasive rubbing pad
Wool Felt H1:
Abrasion test according to various standards, hardness H1
・ Disc Options
PMMA discs for Fingernailscratch acc. to BMW GS 97034-2
PVC sharpened tubes for industrial nail scratch
Leather or SBR discs for shoe sole test acc. to BMW GS 97034-3
・Media Options
Artificial Sweat acc. to:
DIN 53160-2:2010-10
BMW GS 97045 (two types)
BMW PR 506
DBL 7384
VW TL 226 (2 types)
FORD DVM-00870 MA
Additional Fluids:
Cleaning paste
Skin lotion
Soil/dirt/Sebum
Plastic cream/hand cream
Cleaner/Spray/Disinfection gel
Sun lotion
・Piston & Weight Options
Supply of standard piston/stamp:
10 mm
20 mm
30 mm
Supply of standard weight to run acc. to various standards and specifications:
• 1 N • 6 N • 1.5 N • 8 N • 2 N • 10 N • 3 N • 15 N • 4 N • 20 N • 5 N • 30 N