Goniophotometric Assessment of Bulk-Related "Optical" Carpet Streaks in Finished Nylon Carpets

Abstract

Further work on bulk-related "optical" carpet streaks is reported here, focusing on their instrumental characterization. Texturing process conditions have been adjusted to create bulk variation in both commercial staple and bulk-continuous-filament (BCF) products. For the staple items, bulk is characterized in the fiber, in the pre- and postheat set yarns, and in the carpet tuft itself. Both the staple fiber and heat-set yam methods are new. Yarns from both carpet manufacturing processes have been implanted as tuftlines into multiple carpet backgrounds, each background made with different levels of bulk. Sixty such staple and 144 BCF implants, most obvious streaks because of their bulk differences, have been evaluated by graders for intensity and shade; these grades correlate well with those ranked instrumentally (R ² = 0.91 and 0.94, respectively) and, for the staple products, with various measures of bulk (R ² from 0.78 to 0.95). Goniophotometry has also been used to ascribe the unique optical effect commonly seen in bulk-related streaks, that of changing shade with view direction, to the carpet's surface filament configuration.

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References

Anton, A. , Johnson, K.A. , and Jansson, P.A. , Characterization of Fabric Luster via Image Analysis, Textile Res. J. 48, 247-251 (1978).

Baxley, R.V. , Jr., and Miller , R.W. , Effects of Suessen Heat Setting Variables on Streaks in Finished Nylon Carpet, Textile Res. J. 61, 697-704 (1991).

Fourt, L. , Howorth, R.M. , Rutherford, M.B. , and Stretcher, P. , Improvement of Luster of Cotton, Part V: Fiber Shape in Relation to Luster , Textile Res. J. 24, 156-163 (1954).

Gibson, M.E. , Miller, R.W. , James , L.M. , Samantra, S.R. , Wolf, K.W. , Shuff, T.J. , Lanier, W.W. , and Tidwell, P.W. , Characteristics of Nylon 66 Staple Yams Heat Set in Standard and Energy Modified Suessen Units , Textile Chem. Color. 18, 55-62 ( 1986).

Hunter, R.S. , "The Measurement of Appearance," Wiley-Interscience , NY, 1975.

Inagaki, K. , Akagawa, N. , and Suda, N. Discussion on Expressing Method of Quality of Fabric Luster, Bull . Textile Res. Inst. Jpn. 29, 368-376 ( 1973).

Jose, D.J. , Hollies, N.R.S. , and Spivak, S.M. , Instrumental Techniques to Quantify Textural Change in Carpet, Part I: Image Analysis, Textile Res. J. 56, 591-597 (1986).

Jose, D.J. , Hollies, N.R.S. , and Spivak , Instrumental Techniques to Quantify Textural Change in Carpet, Part II: Goniophotometry , Textile Res. J. 58, 185-190 (1988).

LeGault, C.M. , Causes of Streaks in Tufted Nylon Carpets , Can. Textile J., 69-74 ( 1974).

10.

LeGault, C.M. , Profiles of Streaking in Nylon Carpeting, Can. Textile J., 36-57 (1987).

11.

van Luijk, C.J. , The Development of a Commercial Bulk Test for Cored Wool Samples, J. Textile Inst., 78, 45-53 (1987).

12.

Makansi, M. , Perception and Control of Fabric Streaks, Part I: Theory, Textile Res. J. 57, 463-472 (1987). 13. Makansi, M. , Perception and Control of Fabric Streaks, Part II: Experimental, Textile Res. J. 57, 495-502 (1987).

13.

Miller, R.W. , Influence of Suessen and Superba Heat Setting on Optical Streak Intensity in Finished Nylon Carpets, Textile Res. J. 64, 75-87 (1994).

14.

Miller, R.W. , and Southern, J.H. , Nylon 66 Carpet Streaks Versus Fiber Crimp and Dyeability, Textile Res. J. 61, 61-70 (1991).

15.

McLaughlin, J.R. , Durrant, P.J. , and McKinnon , A.J. , Objective Measurement of Tuft Definition, Texture, and Appearance Retention in Carpets , in "Proc. 7th International Wool Textile Research Conference III, Tokyo," 1985, pp. 298-306.

16.

Neter, J. , Wasserman, W. , and Kutner, M.H. , "Applied Linear Statistical Models," Richard D. Irwin, Inc., IL, 1985.

17.

Rousseeuw, P.J. , Least Median of Squares Regression, J. Am. Stat. Assoc. 79, 871-880 (1984).

18.

Rousseeuw, P.J. , and Leroy, A.M. , "Robust Regression Diagnostics and Influence Analysis." John Wiley and Sons, Inc., NY, 1987.

19.

Werny, F. , Correlation of Subjective Carpet Luster with Specular Reflectance , Textile Res. J. 55, 686-693 (1985).

20.

Wood, E.J. , and Hodgson, R.M. , Carpet Texture Measurement Using Image Analysis, Textile Res. J. 59, 1-12 (1989).

21.

Wu, Y. , Pourdeyhimi, B. , Spivak, S.M. , and Hollies, N.R.S. , Instrumental Techniques to Quantify Textural and Appearance Changes in Carpet, Part III: Colorimetric Image Analysis, Textile Res. J. 60, 673-687 ( 1990).

22.

Wu, Y. , Pourdeyhimi, B. , and Spivak, S.M. , Texture Evaluation of Carpets Using Image Analysis, Textile Res. J. 61, 407-419 (1991).