EN 45545-2:2020 T11 smoke toxicity test

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 45545-2:2020 T11 Smoke toxicity test - Test principle
EN 45545-2:2020 T11 The test method for smoke toxicity test is based on EN17084 Toxic methods .EN 45545-2:2020 T11 Is in EN 17084（EN ISO 5659-2） On the basis of , Add the requirements of combustion mode and test time .
1.      Smoke production test

In the smoke density box with specified volume , Vertically or horizontally mounted specimens are subjected to certain thermal radiation and / Or the action of fire , High temperature decomposition and / Or flame combustion produces smoke .
2.      Smoke toxicity test

On the... Day after the start of the smoke production test 4 minute 、 The first 8 Minutes or other specified point in time , Start to collect flue gas , Used to deal with CO、HF、HCl、NOX ( Include NO and NO2)、SO2、HCN、CO2 and HBr Content determination of eight gases , Company ：ppm. The determination methods are gas detection tube method and Fourier transform infrared spectrometer FTIR Law （ Non dispersive infrared spectrometer method and flue gas analyzer method ）.
 

EN 45545-2:2020 T11 Smoke toxicity test – Sample requirements
（75±1）mm×（75±1）mm× The thickness of the ≤25mm

EN 45545-2:2020 T11 Smoke toxicity test –ISO5659 Combustion mode

2 Choose one or more of the modes ：

T11.01 50kW/m2 Flaming & Flameless or T11.02 25kW/m2 Flaming & Flameless
 

EN 45545-2:2020 T11 Smoke toxicity test – Test time

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

EN 45545-2:2020 T10 Smoke density detection by Horizontal method – test result

1)      For each gas first , Calculate the 4min（ namely 220s~260s） And the 8min（ namely 460s~500s） Average value , Company ：ppm.

2)      Then convert the average value into mass concentration , Company ：mg/m3.

3)      Then for each sample , Calculation CIT(4min) and CIT（8min）, Then average .

4)      Final take CIT(4min) and CIT（8min） The maximum value of the average .

EN 45545-2:2020 T10 Smoke density detection by Horizontal method – Supplementary tests

No special reason , In a certain test mode 3 individual CIT Data value , The deviation of a data value from the average 50% above , In this mode , Test another group 3 individual , Final CIT take 6 The average of the data .

come from GF2022