EN 17333-1-2020 pdf download.Characterisation of one component foam – Part 1 : Foam yield characteristics.
— Method 1 — Determination of the apparent density of an OCF extruded in a joint and calculation of the theoretical loam yield in running meters of the whole can.
— Method 2 – Determination of the real yield of cured foam, respecting eventual cavities Inside the foam structure.
— Method 3 — Determination of the free foamed density of a cured OCF for identification purposes only.
— Method 4— Determination of the total foam yield for the whole OCF container for moisture and self- curing foam that can be measured by water displacement.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 923, Adhesives – Terms and definitions
EN 15006. Metal aerosol containers- Aluminium containers – Dimensions of the 25,4 mm aperture
EN 14847, Aerosol containers- Tin plate containers – Dimensions of the 25.4 mm aperture
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 923 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www,iso,org/obp/ui
— IEC Electropedia: available at littv:/Jsyvjlectropjja,oig./
3.1
one component foam
(OCF)
moisture curing or water drying foam as well as self-curing activatable foam dispensed from a single pressurised foam container
3.2
free foamed density
density of cured foam after expanding without physical constraints
3.6
pressurised foam container
pressurised can according to EN 14847 and EN 15006
3.7
test container
pressurised can according to EN 14847 and EN 15006 used for testing purposes
3.8
self-curing activatable foam
one component foam with internal cartridge containing reactive components
3.9
fully cured or dried foam
cross-linked foam which reaches its serviceable properties as claimed by the manufacturer
3.10
straw foam
one component or two component foam for the extrusion with an adapter tube
3.11
gun foam
one component foam for the extrusion with a foam application gun
4 Test methods
4.1 Method 1 — Joint foamed density and foam yield
4.1.1 Principle
The foam is dispensed into a joint with fixed dimensions. The joint foamed density of the cured foam is calculated using the weight and volume of the foam. The theoretical joint foam yield is calculated by measuring the amount sprayed.
NOTE Joint density can differ from the free foamed density determined by Method 3 in 4.3.
4.1.2 EquIpment
For each joint:
4.1.2.1 2 gypsum boards, with dimensions 420 mm x 100 mm x 12,5 mm.
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 x 100 mm x 30 mm.
b) Weigh the paper w, 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 (mj.
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 mo.
1) Fill the first joint according to manufacturers 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 (mn).
h) Repeat the steps 1) to g) twice with the remainder of the test container (test container half empty and the last 10 % of the test container) to fill all three joints. Write down new values for mo and m for both measurements.
NOTE if test container is emptied before all three joints are filled only include the full joints in the
calculations.EN 17333-1-2020 pdf download.