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How to send samples when applying for BS 476-7 display? Is it the same as the display??
2022-07-05 21:00:00 【Zhongke Yishuo】
BS 476-7 It is a test of surface combustion performance , So it is generally for surface materials . So the existing display screen is a test surface PC material , take PC Materials are cut into sample specifications and then sent for sample testing . The display can also refer to this principle , At present, the customers of the display screen are the toughened film on the surface of the display screen , And the back shell plastic , The two materials were tested for flame retardancy , May refer to .
Sample submission suggestions :
Surface material tempered film ;
Rear shell plastic ;
Other non-metallic materials .
PS: Specific sample delivery can be communicated with customers ,BS476-7 Not mandatory , How many materials are tested depends on the customer's requirements .
Sample specification :
885mmx270m
Shall provide 6 To 9 Test samples , And the test sample shall be representative of the exposed surface of such products .
Summary of the test :
Here it is BS 476 In the standard , According to the specified convection conditions , Method for measuring the transverse diffusivity of a flame on a surface of a vertically placed specimen , And the classification system determined according to the rate of flame diffusion . It also provides plane materials that can be used to compare walls or ceilings 、 Final performance of composite materials and components .
Level classification :
Class 1,Class 2,Class 3,Class4
Standard full name :
BS476-7: Fire resistance test of building materials – Determination of surface burning grade
BS476-7: Method of test to determine the classification of the surface spread of flame of products
Other building materials standards :
EN 13501-1: Fire classification of building products and components Part I : Reaction data to fire classification test
DIN 4102-1: Fire performance of building materials and components Part I : Classification and grade of requirements and tests for building materials
NF P 92-501: Flame retardant and fireproof test of French materials M Grade determination - Rigid materials (M0,M1,M2,M3,M4)
NF P 92-503: Flame retardant and fireproof test of French materials M Grade determination - Flexible materials (M0,M1,M2,M3,M4)
BS 476: Flame retardant test of building materials , Fire test
come from :JJ2022
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