ISO 3536 pdf download.Road vehicles — Safety glazing materials — Vocabulary
1 Scope
This International Standard defines terms relating to safety glazing materials for road vehicles.
2 Terms and definitions
2.1 safety glazing material product consisting of organic and/or inorganic materials so constructed or treated to minimize the likelihood of injury to persons as a result of contact with these safety glazing materials when used in a vehicle, and for which special requirements regarding visibility, strength and abrasion are laid down 2.2 toughened safety glazing material product consisting of a single layer of glass which has been subjected to special treatment to increase its mechanical strength and to condition its fragmentation characteristics after breaking 2.3 laminated safety glazing material product consisting of two or more layers of glass held together by one or more layers of interlayer NOTE Two types are recognized: – ordinary: when the layers of glass are untreated, i.e. normal annealed glass; 一treated: when at least one of the layers of glass has been specially treated to increase its mechanical strength and to condition its fragmentation characteristics after breaking. 2.4 glass-plastic safety glazing material product consisting of any glazing material which may comprise one or more layers of glass and one or more layers of plastic in which a plastic surface of the product faces inward towards the vehicle passenger compartment when installed in a vehicle 2.5 plastic safety glazing material safety glazing material that contains as an essential ingredient one or more organic polymeric substances of large molecular weight, is solid in its finished state and, at some stage in its manufacture or processing into finished articles, can be shaped by flow NOTE Such material is classified as rigid or flexible by use of the test described in Annex A. 2.6 vision area that part of the safety glazing material which has to satisfy special optical requirements and which is used in driving the vehicle 2.7 primary vision area that part of the vision area immediately in front of the driver，through which pass the driver’s principal directions of vision 2.8 optical deviation angular deviation angle between the directions of the incident ray and the emergent ray refracted by the safety glazing material 2.9 wedge departure from parallelism of the surfaces of the safety glazing material, that may be inherent in the basic product or may result from the techniques employed in producing the designed curvature 2.11 secondary image ghost image spurious image， in addition to the bright primary image, usually seen at night when the object being viewed is very bright in relation to its surroundings, for example, the headlights of an approaching vehicle 2.12 optical distortion in a given direction algebraic difference a in angular deviations 01 and 02 measured between two points M and M’ on the surface of the safety glazing material, the distance between them being such that their projections on a plane at right angles to the direction of vision are separated by a given distance Or See Figure 1. 2.13 luminous reflectance ratio of the reflected luminous flux to the incident luminous flux NOTE Luminous reflectance depends on relative spectral power distribution of the light source.
A 300 mm ¥ 25 mm test piece of the material to be categorized is held horizontally clamped at one end, and allowed to bend freely under its own weight (see Figure A.1 ) at the test conditions. If the deflection from the horizontal is less than or equal to 50 mm after 60 s, the material shall be categorized as rigid. If the maximum deflection is greater than 50 mm, the material shall be categorized as flexible.