PD 6577:1995

Foreword
Introduction
1. Scope
2. References
3. Definitions
4. Work programme
5. Experimental results
6. Discussion
7. Overall recommendations
Annex
A. (informative) Summary of results
Tables
1. Atmospheric conditions referred to in various
     standards
2. Fabric characteristics
3. Fabric/yarn characteristics
4. Fabric variability along the length (preliminary
     testing at 65% r.h./20 deg C) (CoV%)
5. Overall test specimen variability (from all conditions)
6. Atmospheric test conditions
7. Ranges of % r.h. and temperature to produce a
     significant effect
8. Sensitivity coefficients of tensile strength
     (warpwise) in N/50 mm
9. Sensitivity coefficients of tensile sterngth
     (weftwise) in N/50 mm
10. Sensitivity coefficients of elongation (warpwise) in %
11. Sensitivity coefficients of elongation (weftwise) in %
12. Sensitivity coefficients of tear strength (warpwise)
13. Sensitivity coefficients of tear strength (weftwise)
14. Sensitivity coefficients of crease recovery (warpwise)
     in degrees
15. Sensitivity coefficients of crease recovery (weftwise)
     in degrees
16. Sensitivity coefficients of mass per unit area
17. Overall summary of sensitivity coefficients: effect
     of temperature at constant humidity, mean value for
     all humidity levels for warp and weft in %
18. Overall summary of sensitivity coefficients: effect
     of humidity at constant temperature, mean value for
     all temperature levels for warp and weft in %
19. Temperature range to produce significant effect (95%)
     on all polymers and for all test properties
20. Humidity range to produce significant effect (95%)
     on all polymers and for all test properties
21. Summary of significance, size and direction of effects
     on humidity at constant temperature and temperature
     at constant humidity
22. Sensitivity coefficients for effect of humidity on
     tensile strength
23. Sensitivity coefficients for effect of humidity on
     mass per unit area
24. Preconditioning: % change from preceding weighing:
     low r.h. to 'standard atmospheres' (r.h./deg C)
25. Preconditioning: % change from preceding weighing:
     high r.h. to 'standard atmospheres' (r.h./deg C)
26. Preconditioning: regain (%) at 65% r.h./20 deg C
27. Preconditioning: regain (%) at 50% r.h./23 deg C
28. Preconditioning: effect of conditioning (in %) from
     the wet and dry (24 h) on regain and predicted
     tensile strength
29. Statistical significance of differences in mean values
     between 50% r.h./23 deg C and 65% r.h./20 deg C
     (number of examples by property)
30. Statistical significance of differences in mean values
     between 50% r.h./23 deg C and 65% r.h./20 deg C
     (number of examples by polymer)
31. Percentage differences in mean values for two
     atmospheres (number of examples for all polymers
     and all properties)
32. Key effects: two atmospheres comparison
33. Test property differences 65% r.h./20 deg C to 50%
     r.h./23 deg C
List of references

Reports the results of a study of the effects of relative humidity and temperature on certain physical properties of a number of fabrics made from a range of natural and synthetic polymers.

This Published Document presents information on the results of a controlled test programme to assess the effect of temperature and relative humidity on physical properties of textile materials.