Document ID: chunk:federal_register_of_legislation:F2015C00542:reg:1:p30
Version: federal_register_of_legislation:F2015C00542
Segment Type: reg
Provision Reference: reg 1 (pt 30/43)
Character Range: 224094–227216

cent of the nominal thickness. For plastic products produced by other techniques (e.g. cast acrylic sheet), the acceptable thickness tolerance is given by the equation (thickness tolerance limits (mm) = ± (0.4 + 0.1 . e) where e is the sheet thickness in millimetres. Reference standard is ISO 7823/1.

              1.1.7. The colouring of the plastic product.

              1.1.8. The nature of the surface coating.

              1.2. The secondary characteristics are as follows:

              1.2.1. The presence or absence of conductors or heating elements.

              2. General

              2.1. In the case of rigid plastic panes the tests shall be conducted either on flat test pieces rigorously representative of the finished product or on finished parts. All optical measurements shall be carried out on real parts.

              2.2. The test pieces shall be freed from protecting maskings 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.

              2.3. To describe the breaking behaviour under dynamical stress, classes will be created depending on the application of the plastics. These classes are related to contact probabilities of the human head with the plastic glazing and they contain different requirements concerning the headform test.

              3. Flexibility 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 rigid the vertical deflection of the test piece shall be less than or equal to 50 mm after 60 seconds.

              4. Headform test

              4.1. Indices of difficulty of the secondary characteristics

               No secondary characteristic is involved.

              4.2. Number of test pieces

               Six flat test pieces (1,170 mm x 570 + 0/-2 mm) or six complete parts shall be subjected to testing.

              4.3. Test method

              4.3.1. The method used shall be that described in Annex 3, paragraph 3.2.

              4.3.2. For glazing like partitions and separating windows which have impact probability (classification VIII/A) the drop height shall be 3 m. The HIC value is also to be measured.

              4.3.3. For glazing like side windows, back windows and sunroofs which have reduced impact possibilities (classification VIII/B) the drop height shall be 1.5 m. The HIC value is also to be measured.

              4.3.4. For glazing which do not have contact possibilities as well as for small windows in vehicles and for all windows in trailers (classification VIII/C) there will be no headform testing. A small window is a window