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Browsing by Author "Van der Merwe, JP"

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Processing performance of South African wools on the woolen system of manufacture Part I: The effect of fibre properties on spinnability

Author: Van der Merwe, JP Date: Feb 1986 Sixty-eight wool blends were processed on the woollen system and were assessed for spinnability by means of a Mean Spindle Speed at Break test. Spinnability improved as mean fibre length increased but deteriorated as mean fibre length increased ... Read more
Processing performance of South African wools on the woollen system of manufacture. Part 2: The effect of fibre properties on carding

Author: Van der Merwe, JP Date: Apr 1986 The effect of fibre diameter, length and resistance to compression on woollen carding performance was investigated. Read more
Rotor spinning of cotton directly from card sliver

Author: Taylor, H ; Van der Merwe, JP ; Veldsman, DP Date: Apr 1978 In this report the authors comment on rotor spinning directly from card sliver and on the beneficial effect on yarn properties of one drawframe passage prior to spinning. Read more
Rotor spinning of cotton, cotton/polyester and polyester. Part I: The influence of doffing tube surface character and position on certain yarn properties

Author: Van der Merwe, JP ; Veldsman, DP Date: Feb 1978 In this article the authors pay particular attention to the effect of introducing grooves (or flutes) in the doffing tube navel and to the positioning of the doffing tube in respect of the rotor base using a Schubert and Saler RU-11 rotor machine. Read more
Some preliminary observations on the open-end spinning of wool

Author: Taylor, H ; Veldsman, DP ; Van der Merwe, JP Date: Mar 1977 The effect of various parameters on the rotor spinning of a 60 tex all-wool yarn was investigated. Read more
Some trials on the production of wool-rich 5-needle queenscord fabrics

Author: McNaughton, D ; Wolfaardt, C ; Van der Merwe, JP Date: Jun 1973 A 5-needle Queenscord was selected to produce "wool-rich" warp knitted fabrics on a 36 gauge Raschel machine. Read more
Studies on pigmented wools. Part 3: A comparison of the worsted, semi-worsted and woollen routes for processing karakul

Author: Strydom, MA ; Van der Merwe, JP Date: Sep 1983 In part II of this series, work concerned with the processing behavior of sorted karakul in five different trade types was described. Read more
The woollen system- development and basic principles

Author: Van der Merwe, JP Date: Mar 1984 Pure wool yarns may be produced on either the woollen or worsted system of manufacture. To the uniformed both will be described as woollen yarns. A distinction must, however, be made between end products produced from either woollen spun yarns ... Read more
Wrap Spinning: Principles and Development

Author: Brydon, AG ; Van der Merwe, JP Date: Feb 1986 A wrap yarn is a composite structure comprising a core of twisted or twisted fibres bound by a yarn or continuous filament. The term wrap yarn therefore include yarns produced by the hollow spindle method as well as similar structure such as ... Read more

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Browsing by Author "Van der Merwe, JP"

Browsing by Author "Van der Merwe, JP"

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