BS EN 17333-1 pdf free download

BS EN 17333-1-2020 pdf free download.Characterisation of one component foam Part 1: Foam yield characteristics.
4.1.2.2 2 spacers, not water absorbing, not adherent (e.g. polyethylene (PE),
polytetrafluoroethylene (PTFE), on which polyurethane (PU) does not adhere), dimensions:
100 mm × 30 mm × 30 mm.
4.1.2.3 Joint mould of inner dimensions 360 mm × 100 mm × 30 mm.
4.1.2.4 Uncoated paper, recommended A3 typewriter
Additional tools:
4.1.2.5 Weighing scale with an accuracy of ±0,1 g.
4.1.2.6 Sharp and clean knife blade.
4.1.2.7 Conditioning chamber capable of being controlled at (23 ± 2) °C and (50 ± 5) % RH.
4.1.3 Sampling
4.1.3.1 Conditioning
The test conditions shall be (23 ± 2) °C and (50 ± 5) % relative humidity unless indicated otherwise.
Bring the test container, gypsum board and paper to the test conditions for at least 24 h.
4.1.3.2 Test pieces
A minimum of three samples shall be subjected to the tests given in this section to obtain accurate measurements of material properties.
4.1.4 Test procedure
a) Build three horizontal joints using the gypsum boards and spacers (see Figures 1 to 3). The inner dimensions of each joint shall be minimum 360 mm × 100 mm × 30 mm.
b) Weigh the paper w p and insert the sheets in the joints.
c) Mount the dispenser tool on the test container and note the initial test container mass with the dispenser tool (m i ).
d) Do not pre-moisten the joint.
e) Shake an unused test container vigorously 20 times and discard the first (40 ± 10) g of foam. Weigh the test container with the dispenser tool again and note the mass m 0 .
f) Fill the first joint according to manufacturer’s instruction whilst avoiding overexpansion. Typical filling levels are (80 ± 10) % of joint height for gun foams and (60 ± 10) % for straw foams.
g) Reweigh the test container with the dispenser tool and note the mass (m n ).
h) Repeat the steps f) to g) twice with the remainder of the test container (test container half emptyand the last 10 % of the test container) to fill all three joints. Write down new values for m 0 and m n for both measurements.
NOTE If test container is emptied before all three joints are filled only include the full joints in thecalculations
i) Extrude the foam until the test container is empty and note the weight of the empty test container with the dispenser tool (m e ).
j) Allow the foam to cure in the joint for at least 24 h at test conditions.
k) Measure the mass of the foam piece including the paper (w f ).
l) Determine the volume (V f ) of the single foam piece including the paper using the principles of Method 3 in 4.3. Write down new values for w f and V f for both measurements.
4.1.6 Test report
Report the following quantities:
a) temperature and relative humidity during the test;
b) joint density of each joint;
c) average joint density, calculated as arithmetic mean of the three individual joint densities;
d) longitudinal foam yield and joint dimensions of each joint;
e) average longitudinal yield of the foam, calculated as arithmetic mean of the three individual longitudinal foam yields;
f) observations and/or comments (if any).BS EN 17333-1 pdf download.