Document ID: chunk:federal_register_of_legislation:F2015C00542:reg:1:p35
Version: federal_register_of_legislation:F2015C00542
Segment Type: reg
Provision Reference: reg 1 (pt 35/43)
Character Range: 238493–241526

are specially produced for that purpose. In both cases the test piece shall in every respect be rigorously representative for the glazing which are produced in the run and for which approval is being sought.

              2.2. The test pieces shall be freed from protecting masks and have to be cleaned carefully before the test.

              2.2.1. They shall be stored for 48 hours at a temperature of 23 °C ± 2 °C and a relative humidity of 50 ± 5 per cent.

              3. Flexibility test and fold test

              3.1. Indices of difficulty of the secondary characteristics

               No secondary characteristic is involved.

              3.2. Number of test pieces

               One flat test piece measuring 300 mm x 25 mm shall be subjected to testing.

              3.3. Test method

              3.3.1. The method used shall be that described in Annex 3, paragraph 12.

              3.4. Interpretation of results

               For a test piece or sample to be considered flexible its vertical deflection shall be more than 50 mm after 60 seconds.

               10 seconds after a 180° folding, the material shall not show any fracture or damage at the point of bending.

              4. Mechanical strength tests

              4.1. Indices of difficulty of the secondary characteristics

               No secondary characteristic is involved.

              4.2. 227 g ball test at 20 °C ± 5 °C

              4.2.1. Number of test pieces

               Ten flat square pieces 300 mm +10/-0 mm shall be subjected to testing.

              4.2.2. Test method

              4.2.2.1. The method used shall be that prescribed in Annex 3, paragraph 2.1.

              4.2.2.2. The height of drop is 2 m for all thicknesses.

              4.2.3. Interpretation of results

              4.2.3.1. The ball test shall be considered to have given a satisfactory result if the ball does not penetrate the test piece.

              4.2.3.2. A set of test pieces submitted for approval shall be considered satisfactory from the point of view of the 227 g ball test if one of the following conditions is met:

              4.2.3.2.1. Eight or more tests give a satisfactory result at the height of drop.

              4.2.3.2.2. More than two tests having given an unsatisfactory result at the minimum height of drop, a further series of tests carried out on a new set of test pieces gives satisfactory results.

              4.3. 227 g ball test at -18 °C ± 2 °C

              4.3.1. To minimize the temperature change of the test piece the test shall be performed within 30 seconds of the removal of the test piece from the conditioning appliance.

              4.3.2. The test method shall be that described in paragraph 4.2.2. of this annex, except that the test piece temperature is -18 °C ± 2 °C.

              4.3.3. Interpretation of results as in paragraph 4.2.3. of this annex.

              5. Test of resistance to the environment

              5.1. Test of resistance to simulated