| 150°C test |
EN 478 |
A test piece of 30 cm is maintained in an oven at 150°C for 30 minutes, and is inspected visually on the inside, outside and cross section of the wall for defects. |
| ash content |
ISO 3451 method A
ISO 1887
ISO 1172 |
Direct calcination, i.e. by burning the organic matter and heating the residue at high temperature until constant mass is reached. |
| colour |
ISO 18314-1
ISO 7724-1
ISO 7724-2
ISO 7724-3 |
Determination of the colour coordinates
(L*, a* and b*-value) of a material. |
| density |
ISO 1183-1 method A
ISO 845
ASTM D792 |
Ratio of the mass of a material to its volume, determined by immersion (Archimedes principle) or by simple weighing and dimension measurements. |
| gloss |
ISO 2813
ASTM D523 |
Gloss level is determined by measuring the reflection of a surface. The intensity of the reflected light depends on the incident angle
(20°, 60° or 85°). |
| heat reversion |
EN 479 |
A test piece of 30 cm is placed in an oven at 100 °C for 1 h. A marked length of this test piece is measured under identical conditions, before and after heating. |
| linear weight |
different standards |
The linear weight of a profile is determined by dividing the weight of a specimen by its length (sample length 30 cm). |
| homogenity (microtome) |
internal test method |
A thin slice of 10 µm is token aff the cross section of a profile, and examined under a microscope (magnitude 50x), looking for inhomogeneities. |
light transmission
(opacity) |
NF 132 |
Measurement of the light transmittance of translucent materials. |
Shore A
(rubber and TPE) |
ISO 868
DIN 53505
ASTM D2240 |
Determination of the hardness of rubber compound, by measuring the resistance to indentation of a needle into the material. |
| boiling test WPC |
EN 15534-1 |
WPC profiles, cut to a length of 10 cm, are immersed in boiling water for 5 hours. Before and after the test, the mass and dimensions are determined in order to determine the weight increase and swelling of the material. |
| methylene chloride test |
internal test method |
A small piece of a PVC-profile (2 cm length) is immersed into methylene chloride for 20 or 30 minutes and checked for defects. |
straightness
(boat / banana) |
internal |
Determination of the gap between the profile and a flat surface, measured in the middle of a 1 meter long profile. |
visual examination
(greyscale) |
ISO 20105/A02
ISO 20105/A03 |
Grey scale for determining changes in colour after weathering tests, consisting of 5 pairs of grey colours. |
