Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.776662
Title: Resilience of some man-made fibres
Author: Varma, Dharmendra S.
Awarding Body: University of Glasgow
Current Institution: University of Glasgow
Date of Award: 1965
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Abstract:
The first part of this research is concerned with the standardisation of a test method to determine the resilience of fibres. The influence of both time and maximum pressure is studied and the loading and unloading cycle is standardised to measure resilience with three maximum pressures (0.01, 0.10 and 1.0 p.s.i.) in the minimum time. The effects of specimen preparation and specimen dimensions (areas and thicknesses) and also the effects of presser foot areas and shapes(plane or hemispherical compressing surface) on measured resilience are investigated. The second part of this work is devoted to investigating those intrinsic fibre properties, which may affect resilience. Six fibre properties, namely, staple length, diameter (denier), crimp characteristics (i.e. percent crimp, uncrimping force, uncrimping energy), inter-fibre friction, tensile elastic recovery and initial modulus are studied. Crimp has the highest influence on resilience whereas fibre friction and diameter indicate comparatively less effect. The staple length shows no significant correlation with resilience and both elastic recovery and initial modulus are also not correlated with resilience. These investigations were carried out on Acrilan, Terylene, and Tricel fibre. The possibility of expressing the thickness-pressure relationship by an equation is considered. The results fit an exponential equation of the form: T = a Pb where 'T' is thickness of the specimen, 'P' is pressure and 'a' and 'b' are constants. The effect of both humidity and temperature on the resilience of fibres is investigated. The resilience decreases as the relative humidity increases. On the other hand there is an increase in resilience with the increase in temperature. Comparison is made between Acrilan, Terylene and Tricel fibres. The influence of surface properties (i.e. amount of finish) of Acrilan studied in relation to the resilience of fibres.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.776662  DOI: Not available
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