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Method and device for testing inflammability of fibrous or strip-shaped solid substance

A technology of solid substances and testing methods, which is applied in chemical analysis by combustion, etc., and can solve problems such as slow operation, lack of intelligent measurement components, and large test errors

Pending Publication Date: 2021-07-06
应急管理部化学品登记中心 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For fibrous or strip-shaped solid substances such as viscose fiber, washed wool, camel hair, cotton, bundled plastic rope, jute, jute yarn, waste cloth strips, etc., the current solid substance flammability test standard does not carry out detailed tests. According to the specifications, the different combustion test strips made by different testers have a great influence on the test results, and may even cause errors in flammability classification
[0004] CN101692078B discloses a device for automatically testing the combustibility of powdery solids. The device adopts the automatic lifting of the ignition rod, and adopts the method of electric heating of the ignition rod, so that the experimenter can conveniently control the ignition rod to be close to or far away from the control panel. Test samples, but the operation is relatively slow, and lacks protection circuit components, in addition, the device lacks intelligent measurement components, and the test error is large
[0006] The above existing tests related to the flammability of solid substances all involve devices, and there is no detailed description of the test methods, and the solid substances tested all involve granular, pasty or powdery substances, and do not target fibrous or strip-shaped solids. Substance Test Methods

Method used

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  • Method and device for testing inflammability of fibrous or strip-shaped solid substance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Taking washed wool as an example, during the flammability test of washed wool, it is straightened and smoothed according to the inherent silkiness of wool, and kept in a continuous state in terms of physical structure, that is, silky wool is not Disconnected and the fleece is not in a clump state. Among the 6 test results, 5 of them need to further test the burning rate, which are 6.1mm / s, 5.7mm / s, 5.6mm / s, 6.1mm / s, 5.7mm / s; only one propagation distance is less than 200mm (that is, it cannot burn 200mm within 2 minutes), and the wet section prevents burning for more than 4 minutes, it should be classified as Class III packaging for flammable solids.

Embodiment 2

[0047] Taking viscose fiber as an example, during the flammability test of viscose fiber, according to the inherent filamentous shape of viscose fiber, it is straightened and smoothed, and the physical structure is guaranteed to be continuous without disconnection. The flammability test results The burning rate is 2.6mm / s, 2.7mm / s, 2.3mm / s, 2.7mm / s, 2.7mm / s, 2.9mm / s respectively, and the wetting section prevents burning for more than 4 minutes, which should be classified as flammable Solid Class III packaging.

Embodiment 3

[0052] Taking camel hair as an example, according to the inherent filamentous shape of camel hair, straighten and smooth it to ensure that it is continuous in shape without disconnection. In this way, a test strip is made. The results of 6 tests: burn and spread within 2 minutes The distance is 65mm, 78mm, 69mm, 75mm, 70mm, 75mm (that is, it cannot burn 200mm within 2 minutes), which is not a flammable solid.

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Abstract

The invention discloses a method for testing the inflammability of a fibrous or strip-shaped solid substance. The method comprises the following steps: straightening and tiling the fibrous or strip-shaped solid substance to be tested according to the physical characteristics of the fibrous or strip-shaped solid substance, and making the fibrous or strip-shaped solid substance into a continuous test strip; placing the test tape on a fire-resistant bearing plate; and igniting or heating one end of the test strip by using an ignition source with the temperature of more than 1000 DEG C, and judging the flammability of the test strip by testing the combustion distance and / or the combustion rate within the limited combustion time. The invention further discloses a testing device for the inflammability of the fibrous or strip-shaped solid matter. According to the testing method and device, the combustion performance test of the fibrous or strip-shaped solid matter can be more scientific and reasonable, and the evaluation and classification result is more accurate.

Description

technical field [0001] The invention relates to a flammability test method and a test device, in particular to a fibrous or strip-shaped solid substance flammability test method and test device. Background technique [0002] In the classification of hazardous chemicals, there is a flammable solid classification item, which is used to determine the ability of powder, granular, paste or mixture to spread combustion, and to determine the burning time of the substance or mixture after it is ignited. In order to distinguish between substances which are capable of igniting, which burn rapidly or which are particularly dangerous to burn, the substance is only classified as a flammable solid if the rate of combustion exceeds a certain limit value. [0003] At present, there are already relevant national standards for the combustion test of solid substances, but the existing test standards indicate that they are only applicable to granular, pasty or powdery substances. For fibrous o...

Claims

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Application Information

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IPC IPC(8): G01N31/12
CPCG01N31/12
Inventor 王双全张䶮宋扬吴保意张会光霍明甲
Owner 应急管理部化学品登记中心
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