Evaluation method of fabric thermal protection performance evaluation value

Abstract

The invention discloses an evaluation method of a fabric thermal protection performance evaluation value. The method comprises the steps of acquiring heat Qi (t) absorbed by simulated skin covered bya fabric in a heat exposure stage and a cooling stage under a plurality of heat exposure time (texp, i) conditions by utilizing a sensor, and calculating heat S (t) required when the skin reaches second-stage burn according to a Stall burn criterion; according to the heat Qi (t) absorbed by the sensor at the moment t and passing through the fabric and the heat S (t) required when the skin reachesthe second-stage burn, calculating a plurality of second-stage burn discrimination factors fi; establishing a regression equation F (texp, i, fi) between the dependent variable second-stage burn discrimination factors fi and the independent variable thermal exposure time texp, i of the fabric according to the plurality of second-stage burn discrimination factor fi values; and acquiring the thermalexposure authentication time of the fabric based on the regression equation F (texp, i, fi) so as to obtain a thermal protection performance evaluation value of the fabric. According to the scheme, the number of times of physical iteration experiments in a traditional thermal protection performance evaluation method can be reduced, and experiment errors are reduced.

Description

technical field [0001] The invention relates to the technical field of thermal protection safety, in particular to a method for evaluating evaluation values ​​of thermal protection performance of fabrics. Background technique [0002] Thermal protection performance test methods and standards are the basis for the development of high-performance protective clothing and equipment. At present, many countries have put forward legislative requirements on the performance of thermal protection materials and products, and the evaluation methods and testing equipment for the thermal protection performance of fabrics are also constantly developing and improving. [0003] Thermal protective performance test (TPP for short) and Radiation protective performance test (RPP for short) are respectively used in flame-retardant protective clothing, protective gloves, etc. And the early method of 100% thermal radiation penetration, the test standards are ASTM D4108-87, ASTM F1939-99a respectiv...

AI Technical Summary

Problems solved by technology

While an iterative technique for determining the timing of heat exposure certification is an integral part of existing testing methods, it has several drawbacks

First of all, the iterative experiment method needs to go through many attempts, which is time-consuming and wastes resources; secondly, when the experiment is terminated, the tester needs to judge the unique intersection point of the sensor energy response curve and the Stoll criterion curve with the naked eye, and the result is subjectively judged by the tester. Affected by their experience, often only approximate results can be obtained, so the TPE and RHP values ​​are very consistent with their definitions, that is, they are only "estimated values", and their accuracy and repeatability are low

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