36—THE EFFECT OF EXTRANEOUS MATTER ON THE INDICATED DIAMETER OF WOOL FIBRES AS MEASURED BY THE AIR-FLOW TECHNIQUE
| Autor: | Dawn R. McKelvie, J. G. Downes |
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| Rok vydání: | 1969 |
| Předmět: | |
| Zdroj: | Journal of the Textile Institute. 60:503-512 |
| ISSN: | 1754-2340 0040-5000 |
| DOI: | 10.1080/00405006908629954 |
| Popis: | The air-flow technique for the measurement of wool-fibre fineness has advantages over other methods because of its speed and convenience of testing. However, if the wool being tested is in the form of washed corings from greasy bales or corings from scoured bales rather than tops, the sample may contain impurities such as vegetable matter or sand and dust, and, although it is possible for such impurities to be removed, the treatment requires time and the continuous attention and judgement of a trained operator. The effect of the presence of impurities on the indicated mean diameter of wool fibres is therefore a matter of some importance, and an account is given in this paper of an investigation undertaken to study this effect. The theoretical basis of the influence of impurities on the indicated diameter is given, and it is shown that the experimental results are, in general, in agreement with the predicted values. Provided that the amount of vegetable matter present does not exceed 5% and coarse, sandy d... |
| Databáze: | OpenAIRE |
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