How to send samples when applying for BS 476-7 display? Is it the same as the display??

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