论文信息 - 16—THE VARIANCE BETWEEN ULTRA-SHORT LENGTHS OF YARN

16—THE VARIANCE BETWEEN ULTRA-SHORT LENGTHS OF YARN

A method for measuring the variance between ultra-short lengths of yarn is presented and shows that the reported flattening of the B(L) curve to a constant value in the B(0) region does not occur at lengths of down to at least 0.1 cm. The curve continues to rise logarithmically as the length decreases, possibly as far as 0.045 cm, though detection imperfections render readings at this length open to some doubt. Yarn irregularity is shown to be strongly dependent on fibre length and on yarn fineness, particularly at short test lengths, and the possibility of periodicities at less than 1-cm ‘wavelengths’ is shown to exist.

W. R. Pelton | K. Slater | Margaret E. Nute

[1] David R. Cox,et al. THE ANALYSIS OF YARN IRREGULARITY , 1951 .

[2] I. Davies. 2—SOME THEORETICAL LIMITATIONS OF SLIVER AUTOLEVELLING SYSTEMS , 1968 .

[3] G. A. R. Foster,et al. 19—Fibre Motion in Roller Drafting , 1951 .

[4] M. Townsend,et al. THE ASSESSMENT OF YARN QUALITY , 1949 .

[5] 35—Some Factors Affecting the Change in Capacity of a Parallel-Plate Condenser Due to the Insertion of a Yarn , 1955 .

[6] P. H. Walker,et al. THE ELECTRONIC MEASUREMENT OF SLIVER, ROVING, AND YARN IRREGULARITY, WITH SPECIAL REFERENCE TO THE USE OF THE FIELDEN BRIDGE CIRCUIT , 1950 .

[7] R. Palmer,et al. 15—THE USE OF THE ZELLWEGER IRREGULARITY TESTER IN FINDING THE VARIANCE–LENGTH CURVE OF WORSTED YARN , 1954 .