This paper reports on work that should lead to real-time characterization of nonwovens as they are being produced. Statistical techniques and image processing techniques are employed. The initial results indicate the possibility of better process understanding and control. The goal of this work is to develop affordable sensors for the needed process measures. The first part deals with methods for off-line characterization of mass uniformity.
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References
1.
Boeckerman, P., Meeting the Special Requirements for On-line Basis Weight Measurement of Lightweight Nonwoven Fabrics, Tappi75, 166-172 ( 1992).
2.
Devore, J.L., "Probability and Statistics for Engineering and the Sciences," 5th ed., Duxbury Thomson Learning, American Statistical Assoc., Alexandria, VA.1999.
3.
Drouin, B., Gagnon, R., Cheam, C., and Silvy, J., A. NewWay for Testing Paper Sheet Formation, Compos. Sci. Technol.61, 389-393 (2001).
4.
Kallmes, O.J. , Techniques for Determining the Fiber Orientation Distribution Throughout the Thickness of a Sheet, Tappi52, 482 (1969).
5.
Kallmes, O.J., and Corte, H., Formation and Structure of Paper, 1, Technical Section, in " Proc. British Paper and Board Maker's Association," William Clowes & Sons, Ltd., London, 1962, pp. 13-46.
Pourdeyhimi, B., and Dent, R., Measurement of Fiber Orientation in Nonwovens, Part 5: Real Webs, Textile Res. J.69 (3), 185-192 (1999).
8.
Pourdeyhimi, B., Xu, B., and Wehrle, L., EvaluatingCarpet Appearance Loss: Periodicity and Tuft Placement, Textile Res. J.64 (1), 21-32 (1994).
9.
Southwood, R. , "Ecological Methods, with Particular Reference to the Study of Insect Populations." Chapman & Hall , NY, 1966.
10.
Greig-Smith, P., "Quantitative Plant Ecology," University of California Press, Los Angeles. CA, 1964.
11.
Stenemur, B. , Method and Device forMonitoring Fiber Orientation Distribution and Web Uniformity on Running Webs of Paper and Nonwovens Based on Light Diffraction Phenomenon, INDA J. Nonwovens Res.4 (2), 42-45 (1994).
12.
Weigert, R.G. , TheSelection of an Optimum Quadrant Size for Sampling the Standard Crop of Grasses and Forbes, Ecology43, 125-129 (1962).
13.
Xuan-chao, H., and Bresee, R., Characterizing Nonwoven Web Structure Using Image Analysis Techniques, Part III: Web Uniformity Analysis, INDA J. Nonwovens Res.5 (3), 28-38 (1994).
