ISO 20852:2020 テキスタイル—シミュレートされた環境でのテキスタイルを介した総熱伝達の決定 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 38, Textiles.

Introduction

This document specifies the testing method for the determination of the amount of the heat transferred through clothing fabrics by the combined dry and evaporative heat emission under the simulated and specified conditions.

The amount of heat emission through clothing from our body is very important for comfort in hot environment or during vigorous activities. It is why we consider the comfort of our body as a thermal balancing among ambient climate, energy metabolism and the performance of clothing through removing the excessive heat from our body. The total heat transfer from the body occurs during both the dry heat transmission such as radiation, convection, conduction and the evaporative heat transmission by sweating at the same time. The amount of total heat transfer depends on both gradients of temperature and humidity, for example, the evaporative heat emission has more weight in hot environment with moderate humidity because the dry heat transfer is decreased by the reduction of the temperature difference between body and ambient climate.

Therefore, this document specifies the testing method for the determination of the amount of the heat transferred through clothing fabrics by the combined dry and evaporative heat emission simultaneously under the simulated and specified standard conditions using sweating guarded hot plate. It is for evaluating the performance of clothing fabrics for cooling down the excessive heat from our body.

1 Scope

This document specifies the test method for determining the amount of heat transferred through clothing fabrics by the combined dry and evaporative heat emission under simulated and specified conditions. This test method can be used for fabrics, films, coatings, foams and leathers including multilayer assemblies used in hot environment or in activities.

The application of this measurement technique is restricted to a maximum amount of total heat transfer which depend on the dimensions and construction of the apparatus used (e.g. about 1 200 W/m² for the maximum specifications of the equipment according to ISO 11092).

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

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