ISO 2411:2000 pdf download
ISO 2411:2000 pdf download.Rubber- or plastics-coated fabrics—Determination of coating adhesion.
4.2 Method of preparation 1
4.2.1 Where the strength of the coating layer exceeds the force of the adhesive bond to the substrate, prepare the test specimen by carefully cutting through the coating to the substrate at right angles to the length of the test specimen. From this cut carefully separate the coating film from the substrate, for a distance sufficient to enable the ends of the test specimen to be mounted in the jaws of the test apparatus. Trim the width of the test specimen to (50 ± 0,5 mm taking care to avoid damaging the longitudinal threads of the substrate.
4.2.2 Condition the test specimens in one of the atmospheres in accordance with EN ISO 2231.
4.2.3 After conditioning, mount the test specimen in the test apparatus, clamping the coated end in the stationary jaw and the coating film in the traversing or moveable jaw (see Figure 1).
NOTE When the adhesion is very strong and it is not possible to manually separate the coating film from the substrate, method of preparation 2 described in 4.3 should be used.
4.3 Method of preparation 2
4.3.1 Where the coating layer is not sufficiently strong to be stripped continuously from the substrate, but where the coating layer can be distinctly identified from the substrate and can be cut through separately, bond two test specimens of the same material face to face, leaving the first 50mm clear of adhesive, and an adhesive system suitable for the type of coating being evaluated. It is important that the adhesive chosen does not cause the coating to swell irreversibly or otherwise affect the coating/fabric bond strength.
NOTE 1 Where the coated surface is treated in any way for example siliconising which can inhibit the coating- to-coating bond, it is recommended that the adhesion test be conducted before any such treatment is applied.
NOTE 2 If necessary, it is possible to use a plain weave cotton fabric, desized and bleached, in order to ensure complete release of remaining solvent.
NOTE 3 Alternatively, when testing PU coated fabrics a sheet of rubber can be used in place of one of the coated specimens. The formulation of the rubber compound should be such as to produce a sheet with low stiffness and low elongation.
4.3.2 To ensure a good bond, the composite test specimen shall be rolled at least twice with a roller of 76 mm face width and mass of 2 kg.
4.3.3 All types of adhesive can be used e.g. solvent based, aqueous based, hot melt reactive. Wherever possible, the adhesive system used should be as agreed between those responsible for carrying out the test and those to whom the test results are reported.
4.3.4 Apply the adhesive strictly in accordance with the recommendations of the adhesive supplier. Allow sufficient time for the bond to attain its optimum strength, turn back the uncoated length of one of the plies of the test specimen and carefully cut through the coating down to the substrate at the adhesion line.
Carefully separate the substrate from its coating for a distance sufficient to enable the ends of the test specimen to be mounted in the jaws of the test apparatus. Trim the test specimen at each edge to a width of (50 ± 0,5) mm taking care to avoid damaging the longitudinal threads of the substrate.
4.3.5 Condition the test specimens in one of the atmospheres as detailed in accordance with EN ISO 2231.
4.3.6 After conditioning, mount the test specimen in the test apparatus, clamping the end of the specimen under test in the stationary jaw and the non-adhesive coated end in the traversing or moveable jaw of the test apparatus (see Figure 2).
4.4 Determination of wet coating adhesion
4.4.1 End-use
It is often desirable, where coated coating adhesion strength when procedures in 4.4.2 and 4.4.3 are that attempts to remove silicone give a misleading result.
fabric is employed in a damp or wet environment, to measure the the coated fabric is wet. In so doing, it is important that the carried out before any silicone finish is applied, as it has been found can seriously affect the strength of the coating adhesion, and thus
4.4.2 Preparation of test specimens.
Prepare ten test specimens in accordance with 4.2 or 4.3.
Totally immerse them for (1 ± 0,1) h in an aqueous solution of a non-ionic wetting agent of concentration no more than 0,1 % in volume at temperature equilibrium with a standard atmosphere in accordance with EN ISO 2231, using a liquor ratio of approximately 20:1. If it is suspected that wetting equilibrium is not attained in 1 h, then use immersion times of either (6 ± 0,25) h or (24 ± 0,25) h. This time shall be stated in the test report.
4.4.3 Conducting the test.
Remove the test specimen from the wetting-out solution described in 4.4.2 and immediately, without drying, conduct the test in accordance with clause 6.
5 Apparatus
A constant rate of traverse ISO 5893, or a constant rate EN ISO 7500-1) shall be used.
variation of applied force.
The central points of the two jaws of the machine shall be in the line of pull, the front edges shall be at right angles to the line of pull, and their clamping faces shall be in the same plane.
