EN 45545-2t10 precautions for smoke density detection by Horizontal method

Prevention of fire , Elimination of disasters , This is an eternal theme of human social security . With the development of synthetic materials in chemical industry at home and abroad 、 light industry 、 Spin 、 Building material 、 Electronics 、 mining 、 automobile 、 The universal promotion and application of space flight and various fields of people's life , People have higher and higher requirements for flame retardant materials .

Insiders have repeatedly called for , In order to reduce the fire hazard , All walks of life before the use of materials , Flammable and combustible materials must be treated with flame retardance

EN 45545-2 T10 Smoke density detection by Horizontal method - Test principle

EN 45545-2:2020 T10 The horizontal method is used for smoke density detection ISO5659-2 Test method for smoke density .

The thickness does not exceed 25mm The sheet-like material shall be placed horizontally in a closed smoke box equipped with a specified level of thermal radiation source , With or without pilot flame , The material produces smoke due to high temperature decomposition or flaming combustion , Determine the transmittance of a vertically parallel beam passing through the smoke , Finally, it is converted into specific optical density .

The smoke density test method is applicable to all plastics , Also applicable to other materials （ Such as rubber 、 Textile coverings 、 Painted surface 、 Wood and other materials ） Evaluation of smoke density .

EN 45545-2 T10 Smoke density detection by Horizontal method –ISO5659-2 Sample specification

（75±1）mm×（75±1）mm× The thickness of the ≤25mm（ Each combustion mode shall be tested at least 3 Samples ）

EN 45545-2T10 Smoke density detection by Horizontal method –ISO5659 Combustion mode

The combustion mode consists of 4 Kind of ：25kW/m2 Flaming ,25kW/m2 Flameless ,50kW/m2 Flaming ,50kW/m2 Flameless .

T10.01 50kW/m2 Flameless Ds,4

T10.02 50kW/m2 Flameless VOF4

T10.03 25kW/m2 Flaming Ds,max

T10.04 50kW/m2 Flameless Ds,max

EN 45545-2:2020 T10 Smoke density detection by Horizontal method - Positioning attention

The burner is located below the bottom of the radiation cone 15mm Position and above the center of the sample .

The distance between the bottom of the radiation cone and the exposed surface of the sample 25mm. notes ： If the sample is an expansive material , Then interval 50mm.

EN 45545-2 T10 Smoke density detection by Horizontal method – Test time

according to EN 45545-2 standard ,ISO5659-2 The test time for smoke density is 10 minute .

EN 45545-2:2020 T10 Smoke density detection by Horizontal method – Observe the phenomenon

Record the special burning phenomenon of the sample , Stratification 、 inflation 、 shrinkage 、 Melting and collapse, etc . If conditions permit , Record the time when the combustion occurred , And the time when the sample is ignited and the duration of the flame .

EN 45545-2T10 Smoke density detection by Horizontal method – Supplementary tests

After the test 3 After samples , If... Of a single sample Ds,max The difference between the value and the average value of the three samples in the group exceeds the average value 50%, Then another set of the same... Shall be tested in the same mode 3 Samples , And record 6 The average of the test results .

come from GF2022