South African Wool and Textile Research Institute (SAWTRI) Collection
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The South African Wool and Textile Research Institute (SAWTRI) was established in Grahamstown in the early 1950's upon the inactive of the South African wool board. This followed the recommendation of Professor J.B Speakman (Professor of Textile Science at Leeds University) who was invited to study the possibility of organizing a wool research facility in South Africa to look after the textile research and development needs of both the wool procedure and growing wool and textile manufacturing industry of South Africa.
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Item From Mohair fleece to fabric: An account of SAWTRI's research(SAWTRI, 1968-02) Veldsman, DPSAWTRI hopes that, through this resume, and through its complete list of publications where more detail is required, a contribution is being made to the knowledge of one of nature's most powerful wonderful fibers.Item Effect of various shrink resist treatments on fabrics knitted from repco wrapped core spun wool yarns(1987-06) Shorthouse, CA; Robinson, GARepco wrapped core-spun (RWCS) and Repco wrapped spun (RWS) wool yarns, having textured nylon or polyester as the filament component were spun to a range of yarn linear densities from three lots of tops (1) polymer treated tops pretreated by the conventional sodium hypochloritelsulphuric acid process, (2) the new SAWTRI gaseous chlorine process and (3) untreated. The yarns knitted satisfactorily, direct from the spinner,s package into medium and fine gauge double jersey fabrics. After dyeing, the untreated fabrics were shrink-resist treated in fabric form.Item Self-twist wool yarns containing textured multifilament yarns in double jersey fabrics(1987-03) Shorthouse, CM; Robinson, GARepco wrapped core-spun (RWCS) and Repco wrapped spun (RWS) wool yarns, having textured nylon or polyester as the filament component, were spun to limiting counts and then knitted into medium and fine gauge double jersey fabrics (Pun to-di-Roma and Interlock) after which they were dyed and finished. This bulletin also contains articles on the following: 1. Self twist wool yarns containing textured multifilament yarns in double jersey fabrics, and 2. A summary of SAWTRI's findings in the field of fusing.Item A review of the physical properties of textured polyester yarns and fabrics and their relationship(1978) Cawood, MPTextured yarns, especially polyester, play an important role in the synthetic and natural yarn market. In the apparel sector the false twist textured yarns have maintained the dominant position.Item SAWTRI Bulletin 1981 Vol 15 issue 1(SAWTRI, 1981-03) De Oliver, PSAWTRI update: The effect of staple crimp, mean fibre diameter and resistance to compression on the bundle tensile properties of a wide range of unrelaxed and wetrelaxed wool tops has been investigated. It was found that the tensile properties were mainly affected by fibre crimp rather than by fibre diameter. Bundle tenacity decreased and bundle extension increased with an increase in crirnp, irrespective of whether the crimp change was due to differences in the original crimp or due to crimp recovery resulting from relaxation of the tops. Bundle extension, however, also tended to increase with an increase in mean fibre diameter. The quotient of resistance to compression and fibre diameter, termed the "bulk/diameter ratio", was taken as a measure of the overall fibre crimp and was better correlated with bundle tenacity than staple crimp or resistance to compression. This issue also contains the following articles: 1. The effect of fibre diameter, staple crimp and resistance to compression on the bundle tenacity tensile properties of wool. 2. A comparison of the performance of experimental cotton varieties in ring and rotor spinning.Item SAWTRI Bulletin 1982 Vol 16 issue 4(SAWTRI, 1982-12) Turpie, DWF; De Olivier, W; Hunter, L; Van Rensburg, JJ; Strydom, MAA major building extension programme and the installation of new equipment were completed during the year. The extensions to the buildings have ·provided the Institute with much needed additional floor space for some of the existing departments and facilitated a more rational installation of processing machines in others. A new woollen processing department and larger steam generating and air-conditioning plant have also been added to the existing complex. This obviously caused some disruption but research has not been impeded unduly. This issue also contains articles on the following: 1.The dimensional properties of greige cotton interlock fabrics stabilized in different ways. 2. A preliminary survey of the dark fibre contamination in some South African fleece wools and belly wools. 3. The simultaneous dyeing, shrinkresist and flame retardant treatment of wool fabrics using reactive dyes and THPOH. 4. Some properties of karakul yarns spun on a Dref II machine.Item SAWTRI Bulletin 1974 Vol 8 issue 1(SAWTRI, 1974-03) De W. Olivier, PSAWTRI bulletin editorial news. This issue also elaborates on the following: 1. The simultaneous and continuous dyeing and shrinkproofing of all wool fabric or top sliver by means of polyacrylate Hercosett resin and reactive dyes. 2. Some interesting observations in the cotton research field.Item SAWTRI Bulletin 1971 Vol 5 issue 1(SAWTRI, 1971-03) Hunter, IM; Weideman, E; Wevers, HW; Veldsman, DPThe decision to convert SAWTRI to a National institute is an expression of confidence in the future of the research. The bulletin also contains the following: 1. A study of the variation in doubling twist of wool worsted hosiery yarns. 2. The influence of mild alkali treatment on wool for short periods and at different temperatures. 3. The use of organic solvents as a substitute for water in textile processingItem SAWTRI Bulletin 1987 Vol 21 issue 4(South African Wool and Textile Research Institute, 1987-12) SAWTRISeam slippage in woven woolen fabrics for leisure wear was investigated. The results obtained showed that a change in the stitch length or sewing thread type did not have a significant effect on the magnitude of seam slippage. However, the use of lap seams and fabric reinforcement (resin spray or fusible tapes) produced a significant reduction in the seam slippage.Item The design and physical properties of co-we-nit men's outerwear fabrics(1972-05) Layton, L; Ellis, R; Robinson, GAA new concept in designing colour-and-co-we-nit effects is described and illustrated with samples.Item The correlations between different measures of weak places in worsted yarns and weaving performance(1987) Hunter, L; Cizek, J; Turpie, DWFAn analysis has been undertaken of the inter-correlation between various measures of weak places in yarns and their role in determining weavability.Item The correlation between two different sewability tests and the effect of certain wool fibre and fabric properties on the sewability of woven fabrics(1983-12) Hunter, L; Cawood, MPThe current report deals with a study undertaken to investigate fabric sewability aspects.Item The correlation between staple strength and single fibre strength for sound and tender wools(1983-04) Hunter, L; Leeuwner, W; Smuts, S; Strydom, MAA good correlation was found between staple tenacity and single fibre tenacity for sound and tender wools.Item The correlation between cotton fibre properties and ring and rotor yarn properties(1982-04) Hunter, L; Gee, EThis paper reports on some findings of a study started at the SAWTRI some five years ago ago, and which was aimed at determining the effect of fibre properties and in particular, air-flow determined fineness and maturity, on the properties of ring-and-rotor- yarns processed along both miniature and full scale routes.Item The correlation between certain parameters used to characteristics wrinkling properties(1976-05) Kelly, IWGood correlation was found between the AATCC Wrinkle Recovery Rating and the mean wrinkle for a series of cotton/polyester blend fabrics.Item The combing performance of different types of comb cylinders for rectilinear combs(1971-02) Aldrich, De VThe combing performance of three types of comb cylinders were investigated, and compared on the basis of top cleanliness, mean fibre length of the top and fibre breakage.Item The continuous shrinkresistant treatment of wool tops using chlorine gas in a conventional suction drum backwash(1983-09) Van Rensburg, NJJ; Barkenhuysen, FAWool tops were shrinkresistant successfully on a conventional suction drum back wash using chlorine gas dissolved in water.Item The contamination of wool by high density polyethylene (HDPE) woolpack material(1985-06) Strydom, MAPilot scale processing trials were carried out with wool which had been packed in a new low fibrillating, high density polyethylne.Item The cleanliness of rectilinear combed tops. Part III: The influence of a double top comb and a burr beater(1972-12) Aldrich, De V; Kruger, PJThe combing performance of a double top comb was compared with that of a single top comb.Item The cleanliness of rectilinear combed tops. Part 2: The influence of the top comb and comb cylinder(1972-12) Aldrich, De V; Kruger, PJThe influence of the gap between pins, percentage void, pin and pin thickness on the combing performance of comb was investigated.