Yearbook 2013/2014 - ehedg

38 Particle and VOC emissions, chemical and biological resistance, and cleanability
Figure 14 shows the results from an assessment of the
chemical resistance of a flooring system with various
exposure times (Exp.) in accordance with ISO 2812-1 and
ISO 4628-1 to -5:
Figure 12. Overview of examples of tested flooring systems,
wall coatings and sealants with regard to outgassing, particulate
emission and microbiological resistance. Note: Not all tests were
carried out on all materials. Key: Type “P” means panel material,
“E” is epoxy-system, “F” is floor system, “S” is sealant, “P” is PUsystem
and “A” is acrylic system.
Chemical Resistance.
Figure 13 shows an example of a classification of the
chemical resistance of another flooring system.
Figure 14. Assessment of the chemical resistance of a material
sample in accordance with ISO 2812-1 and ISO 4628-1 to -5.
Photographic examples of the effects of two chemicals.
Cleanability
Figure 13: Example of assessment of chemical resistance of a
material sample in accordance with VDI 2083 Part 17.
The cleanability of a material surface is currently expressed
as a relative cleaning success. If, for example, a surface
cleanliness class of SPC = 6 (SPC class in accordance with
ISO 14644-9 [26]) is ascertained before cleaning and SPC
= 4 after cleaning, the relative cleaning success is two SPC
classes. One method of standardisation would be to have a
defined level of initial contamination. As no valid standards
apply at the moment, the relative cleaning success is
used as a comparable material value. For the purposes
of comparison, an identical level of contamination was
applied to the test materials listed below, which was then
measured, removed and the surface inspected again after
cleaning. Surface roughness values Ra in accordance with
ISO 4287 along and across the direction of grinding were