Determination of the thermal resistance of textiles. Two-plate method: fixed pressure procedure, two-plate plate method: fixed opening procedure, and single-plate method

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

25-11-2005

Publisher

British Standards Institution

Committees responsible
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Units
5 Principle
6 Apparatus
7 Calibration of the standard thermal resistance
8 Atmosphere for conditioning and testing
9 Test specimens
10 Procedure
11 Calculation and expression of results
12 Test report
Annex A (normative) Calibration of standard thermal
resistance
Annex B (normative) Thermal conductivity
Annex C (informative) Accuracy
Bibliography

Specifies three methods for the determination of the resistance of fabrics, fabric assemblies or fibre aggregates in sheet form to the transmission of heat through them in the steady state condition.

This part of BS 4745 specifies three methods for the determination of the resistance of fabrics, fabric assemblies or fibre aggregates in sheet form to the transmission of heat through them in the steady state condition. It applies to materials whose thermal resistance is up to approximately o.2 m2· K/W. These methods are suitable for materials up to 2o mm thick (above this thickness, edge losses become appreciable). Advice on suitable components for constructing the apparatus is given in Annex A and means of calculating the thermal conductivity are described in Annex B. Three methods are described: two-plate method: fixed pressure procedure; two-plate method: fixed opening procedure; single-plate method. Either of the two-plate methods is suitable for materials that, when in use, have their outer faces shielded from the ambient air, e.g a blanket when covered by a bedspread. The single-plate method is suitable for materials that, when in use, have their outer faces exposed to the ambient air (e.g. bedspreads and outerwear). The two-plate methods are generally preferred on accuracy and reproducibility grounds.

Committee	TCI/100
DevelopmentNote	Supersedes BS 4745(1990). (11/2005) Reviewed and confirmed by BSI, November 2011. (10/2011)
DocumentType	Standard
Pages	14
PublisherName	British Standards Institution
Status	Current

BS 874-3.2:1990	Methods for determining thermal insulating properties. Tests for thermal transmittance and conductance Calibrated hot-box method
ISO 8302:1991	Thermal insulation — Determination of steady-state thermal resistance and related properties — Guarded hot plate apparatus
BS EN ISO 5084:1997	Textiles. Determination of thickness of textiles and textile products
BS 874-1:1986	Methods for determining thermal insulating properties Introduction, definitions and principles of measurement
ISO 139:2005	Textiles Standard atmospheres for conditioning and testing
ISO 5085-2:1990	Textiles Determination of thermal resistance Part 2: High thermal resistance
BS 874-3.1:1987	Methods for determining thermal insulating properties. Tests for thermal transmittance and conductance Guarded hot-box method

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BS 4745:2005

Determination of the thermal resistance of textiles. Two-plate method: fixed pressure procedure, two-plate plate method: fixed opening procedure, and single-plate method

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Abstract

Scope

General Product Information

Standards Referencing This Book

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