Method for determining ignition time of plate-shaped materials in thermal radiation field

Abstract

The invention relates to a method for determining ignition time of plate-shaped materials in a thermal radiation field. According to the method, a testing device formed by a radiation cone, a heat flow meter, a high-pressure pulse electrode and a test sample supporting platform is utilized to determine a plurality of groups of measured data of the same test sample under different radiation intensity, a functional relationship between the thermal radiation intensity and the ignition time is deduced through a formula, and accordingly, the ignition time of the sample under any thermal radiation field intensity can be determined. The method has the advantages that the test sample device is simple in structure and easy to operate, can determine the ignition time of a plurality of groups of test samples under specific external thermal radiation intensity, determines the functional relationship between the thermal radiation intensity and the ignition time through simple data processing, obtains serial data, and improves efficiency; accidental factors and test errors caused by single determination are avoided, and accuracy of the obtained data result is high; the quantity of the samples required by a test is greatly reduced, so that test cost is reduced; and influence caused by the test environment, sample features and the like is small, and an actual comparison test proves that the ignition time determined by the method and the measured data have high consistency.

Description

technical field [0001] The invention relates to a method for testing and determining the ignition time of plate-shaped materials, in particular to a method for determining the ignition time required for the combustion phenomenon of plate-shaped materials in a thermal radiation field, and is mainly used in the anti-ignition characteristics of plate-shaped materials analysis and evaluation. Background technique [0002] The ignition time is an important index to characterize the flame retardancy of the material itself. The length of the ignition time indicates the ability of the material to resist external heat radiation and prevent itself from burning. This indicator is widely used in many mandatory national standards of GB 20286-2006 "Flame Retardant Products and Components Combustion Performance Requirements and Labeling in Public Places". At present, there is no special molding equipment for the determination of ignition time, which can only ...

AI Technical Summary

Problems solved by technology

At present, there is no special molding equipment for the determination of ignition time, which can only be carried out by a single test, and has the following disadvantages:

[0003] (1) Some large-scale equipment has the function of testing the ignition time, but the investment is often large, especially the imported equipment with high precision is more expensive, and it is often reluctant to purchase for the units that are short of funds or use the frequency of use

[0004] (2) A single test can only measure the ignition time of the sample under a certain intensity of thermal radiation field, the efficiency is low, and a series of data cannot be obtained

[0005] (3) The sample specifications required for large-scale equipment tests are relatively large, and some conditions are not easy to obtain

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