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GB/T 41958-2022: Dipped canvas - Test method for thermal conductivity
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GB/T 41958-2022: Dipped canvas - Test method for thermal conductivity

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ICS 83.140.99 CCSG47 National Standards of People's Republic of China Test method for thermal conductivity of dipped canvas Posted on 2022-12-30 2023-07-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents" drafting. Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Petroleum and Chemical Industry Federation. This document is prepared by the Technical Committee of National Standardization Technical Committee on Rubber and Rubber Products (SAC/TC35/SC13) Focus on. This document is drafted by. Anhui Engineering University, Anhui Huaye Special Materials Co., Ltd., Qingdao University of Science and Technology, Qingdao Tianbang Wire Industry Co., Ltd. Division, Qingdao Shengke Materials Co., Ltd., Qingdao New Material Technology Industrial Park Development Co., Ltd., Qingdao Keda New Rubber and Plastic Technology Service Co., Ltd. The main drafters of this document. Xie Yanxia, Zhou Yechang, Liu Li, Yu Baige, Du Aihua, Ding Naixiu, Zhang Baogang. Test method for thermal conductivity of dipped canvas

1 Scope

This document describes the test method for the determination of the thermal conductivity of dipped canvas at temperatures ranging from 50 °C to 250 °C using the planar heat source method. This document is applicable to the test of thermal conductivity of dipped canvas.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 2941 Rubber physical test methods Specimen preparation and general procedures for adjustment GB/T 8170 Numerical rounding off rules and expression and determination of limit values GB/T 31334.6 Test methods for dipped canvas - Part 6.Measurement of basic items such as size and grammage GB/T 32110 Terms and definitions of impregnated framework materials

3 Terms and Definitions

The following terms and definitions defined in GB/T 32110 apply to this document. 3.1 Heat flux heatflux The amount of heat transferred per unit area per unit time. 3.2 The heat flux in a body under the action of a unit temperature gradient. 4.Test principle This experiment is mainly based on the principle of steady-state heat transfer with two-layer flat walls without internal heat source, as shown in Fig. 1, for the steady-state heat transfer along the heat transfer direction, generally The heat flux through each flat wall is equal. Acquisition of hot plate temperature, dipped canvas/standard module temperature, standard module surface temperature, based on Fourier The leaf heat transfer equation calculates the heat flux according to the temperature difference along the heat transfer direction of the standard module, the thickness of the module and the thermal conductivity of the module; according to the heat flux, The temperature difference in the heat transfer direction of the dipped canvas and the thickness of the dipped canvas are used to calculate the comprehensive thermal conductivity of the dipped canvas. Characterization of dipped sails by comprehensive thermal conductivity The thermal conductivity of the cloth. ...