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Abstract

Load-extension measurements were made on wool fibers and yams in steam, air at 100°C, and water at different tem peratures in the range 20-90°C. Samples were subjected to the action of steam, air at 100°C, and water at 90°C for different periods before being loaded in the respective media. It was found that for all three heating media, extensibility passed through a maximum value when wool was elongated in the process of heat absorption. Temperature-dependent transitions in water were found to be around 40° and 70°C for reduced wool. Load-extension measurements of wool in steam showed that the effect of crosslinking treatment can be seen, if comparison is made between the load-extension curves of crosslinked and pretreated wool and not between crosslinked and untreated wool.

Keywords

Wool fibers wool yarns. Treated wool reduced wool. Temperature steam air water NaHSO2 crosslinking agent Fixapret CPN(TN)bisulfite. Load steaming presteaming heating preheating. Extension extension rate extensi bility residual extension deformation modulus Hookean region yield region post-yield region turn-over point (yield to post-yield region)heat-mass transfer temperature-dependent transition transition temperature. Load-extension behavior. Temperature dependence.

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References

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Load-Deformation Behavior of Wool at High Temperatures in Different Media

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