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BS 4745:2005

Current

Current

The latest, up-to-date edition.

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

€147.24
Excluding VAT

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.

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

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.

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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