EN 263-2008 pdf download.Sanitary appliances – Crosslinked cast acrylic sheets for baths and shower trays for domestic purposes.
44.2.4 Test specimens
Specimens shall measure (100±5) mm x (100 ± 5) mm.
4.4.3 Procedure
Use a separate test specimen foc each reagent test. Clean the test area thoroughly with hot soapy water, rinse and dry with a clean soft cloth.
On each test specimen deposit a drop of the test solution. Cover the drop thus formed with a watch glass concave downwards. The drop size shall be determined in order to be completely covered by the watch glass. Allow to act for a time of (120 ± 5) mm, at a temperature of (23 ± 5)°C with the test areas protected from the affects of sunlight.
Thoroughly rinse the test specimen with demineralized water and check for adverse changes in appearance by visual examination. If deterioation exists, dip the foam disc of the cleaning device into demineralized water and place it on the surface to be cleaned. Rotate the device at 60 min1.
Clean for thirty revolutions.
Rinse with demineralized water and visually examine the test area. If deterioration persists repeat the cleaning process with an abrasive agent added to demineralized water. This abrasive agent is defined as follows:
alumina used for surface polishing, with particle size comprised between 0,1 iim arid 2 pm and centred on 0,5 pm
4.4.4 Results
Note whether or not the reagent causes a stain or deterioration, whether or not such stain or deterioration is removed and if so with water or water with abrasive agent. If the stain is not removed by the water with abrasive agent record as permanently stained.
4.5 DetermInation of resistance to wet and dry cycling
4.5.1 Test specimens
The specimens to be tested shall be (100 ± 2) mm2. Prior to commencing the test examine the show faces of the samples and mark any surface defects.
4.5.2 Procedure
Place a maximum of ten specimens to be tested vertically in a suitable carrier and place the carrier in a suitable open container. The carrier shall be arranged to avoid contact of one test specimen with another.
Pour 2 I of boiling water into the container. Test specimens must be covered.
Leave the test specimens in the water for (8 ± 0.25) h whilst allowing cooling to room temperature.
Remove the test specimens from the water, wipe the surfaces with a soft dampened cloth and place the test specimens for drying into an oven for (16 ± 0,5) h at a temperature of (50 ± 2) °C. When placing the test specimens in the oven ensure they do not touch the oven walls or each other.
Repeat this cycle twenty times using the same test specimens. In the event of an interruption of the test procedure. e.g. over the weekend, leave the test specimens in the oven at a temperature of
(50±2)°C.
After twenty cycles brush over the show face of each test specimen with a solution of eosine (100 gIl In water)
to which is added 1 cm3Il of liquid detergent using a soft sponge or a paint brush. Leave the solution for (5 ± 1)
mm, then remove from the surface by wiping with a dean soft dampened cloth.
4.5.3 Results
Verify and record any adverse changes in appearance (blisters, crazing, cracks etc.) by visual examination and by the presence of traces of eosine.
When making the visual inspection, ignore the 3 mm width along each side to exclude any influence caused by the cut edges.
4.6 Verification of crosslinking
Cut a sample approximately (30 ± 5) mm x (20 ± 5) mm from the sheet under test. Place this in a sealed glass container with 100 ml of methyl-methacrytate or chloroform. Leave for at least 16 h (methyl methacrylate) or 2 h (chloroform) at (23 ± 5) °C. After immersion check if the specimen is dissolved or sticks to the walls of the container. When touched with a glass rod or a spatula, check if the sample sticks to it or shows signs of stringing as the rod or spatula is removed.EN 263-2008 pdf download.