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Sample containing device for cone calorimeter and test method

A cone calorimeter and holding device technology, applied in the direction of material thermal development, can solve problems such as offset, use limitation, thin and light sample warping, etc., to expand the use range, eliminate system errors, improve accuracy and reproducible effect

Inactive Publication Date: 2016-04-20
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the two patents solve the problem that the light and thin samples have obvious warping and offset during the combustion process, and even part of the samples are flying with the air flow, resulting in obvious errors in the test results.
However, in the testing process of textiles, only woven or knitted fabrics of cellulose fibers such as pure cotton, pure linen, and pure viscose without flame-retardant finishing have warping and offset phenomena.
Products of other fibers, especially fiber products after flame-retardant processing, do not have these phenomena during the test process; cotton, hemp, viscose fiber and other fiber blended products do not have these phenomena, so that the use of this method is restricted. limit

Method used

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  • Sample containing device for cone calorimeter and test method
  • Sample containing device for cone calorimeter and test method
  • Sample containing device for cone calorimeter and test method

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Effect test

Embodiment approach

[0023] According to a preferred embodiment of the present invention, the structure of the sample holder is as Figure 1a-Figure 1c shown. The accompanying drawing shows that the sample holder is a cuboid with the recess formed on the top, wherein the bottom surface of the sample holder is square, the recess is an inverted regular pyramid, and the bottom area of ​​the regular pyramid is equal to the area of ​​the bottom surface of the sample holder.

[0024] According to the sample holding device of the present invention, the material of the sample rack can be selected with reference to the prior art, for example, it can be selected from heat insulating materials that can withstand 1000°C. From the viewpoint of easy availability of materials, it is preferable that the material of the sample holder is selected from ceramics or corundum.

[0025] In the present invention, the grid is used to cover the recess, and this structure can ensure that the synthetic fiber-containing texti...

Embodiment 1

[0040] This embodiment is used to illustrate the sample holding device and test method for the cone calorimeter of the present invention.

[0041] The sample holding device used in this embodiment is specifically as follows: the structure of the sample rack is as follows: Figure 1a-Figure 1c As shown, the material of the sample holder is ceramic, and the height of the sample holder is 27mm; the slope of the conical surface of the concave part is 1:5. The grid is welded by 6 vertical and 6 horizontal stainless steel wires, the length of each stainless steel wire is 10mm, and the diameter is 2mm.

[0042] The test method of the present embodiment is carried out according to the following steps:

[0043] (1) Accurately cut 10cm×10cm to be tested 210g / m 2 Several pieces of pure polyester woven fabric samples;

[0044] (2) Place the sample to be tested in an oven at 100°C and dry to constant weight;

[0045] (3) Stack the samples to be tested in 3 layers and wrap them with alum...

Embodiment 2

[0056] This embodiment is used to illustrate the sample holding device and test method for the cone calorimeter of the present invention.

[0057] The sample holding device used in this embodiment is specifically as follows: the structure of the sample rack is as follows: Figure 1a-Figure 1c As shown, the material of the sample holder is ceramic, and the height is 27mm; the slope of the conical surface of the concave part is 1:57. The grid is welded by 6 vertical and 6 horizontal stainless steel wires, the length of each stainless steel wire is 10mm, and the diameter is 2mm.

[0058] The test method of the present embodiment is carried out according to the following steps:

[0059] (1) Accurately cut 10cm×10cm to be tested 160g / m 2 Several pieces of nylon / spandex blended textile samples;

[0060] (2) Place the sample to be tested in an oven at 100°C and dry to constant weight;

[0061] (3) Stack the samples to be tested in 6 layers and wrap them in aluminum foil;

[0062]...

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Abstract

The present invention provides a sample containing device for a cone calorimeter and a test method, the sample containing device comprises a sample holder and a removable grille, the upper part of the sample holder is provided with a concave part for accommodating a textile sample containing synthetic fiber, the concave part is an inverted pyramid, and the removable grille is used for covering the concave part. By use of the sample containing device, after the textile sample containing the synthetic fiber is subjected to high temperature radiation, all synthetic fiber in the sample can be heated and ignited, so that original system errors are completely eliminated, fire burning real situations can be better met, and test accuracy and repeatability can be significantly improved. In addition, the method also extends the use range of the cone calorimeter in textile materials.

Description

technical field [0001] The invention belongs to the field of material combustion performance analysis, in particular to a sample holding device for a cone calorimeter and a method for testing textiles containing synthetic fibers by using a cone calorimeter. Background technique [0002] The cone calorimeter is currently recognized as the best small-scale fire test device for measuring the fire performance of materials. It is based on the principle of oxygen consumption discovered and summarized by Thornton, Huggrtt, etc., that is, when most substances burn, 1g of oxygen will release 13.1kJ of heat (that is, the E value, with a deviation of ±5%). During the detection, a variety of fire conditions are simulated by applying thermal radiation, and the thermal parameters (heat release rate, total heat release, mass loss rate, ignition time) and smoke parameters (smoke index, smoke release rate, CO release rate, CO 2 Release rate) and other fire parameters and their dynamic chan...

Claims

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Application Information

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IPC IPC(8): G01N25/22
Inventor 王然谢维斌
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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