Effect of Changes in Knit Structure and Density on the Mechanical and Hand Properties of Weft-Knitted Fabrics for Outerwear

Abstract

This study focuses on the mechanical properties of weft knits for outerwear as a function of knit structure and density and the relationships between hand, structure, and density. Eighteen weft knits are produced with six different structures (1 × 1 rib, half-cardigan rib, half-milano rib, interlock, single-pique, and crossmiss interlock) and three different densities (loose, medium, tight). The mechanical properties and hand values of the fabrics are measured using the KES-F method. Tensile properties increase for fabrics with a higher density, as do bending and shear properties. Compression values decrease somewhat as knit density increases but differences in compression values are not very large. Surface properties such as softness and smoothness increase with density. Specific findings for tensile properties reveal that the single-pique and the crossmiss interlock can not absorb external stress as much as the 1 × 1 rib and the interlock when stresses are applied in the course direction. Knits with tuck and miss stitches (half- cardigan rib, half-milano rib, single-pique, and crossmiss interlock) have better dimen sional stability than fabrics with only knit stitches. Testing of primary hand values shows increased stiffness and fullness and softness and decreased smoothness as knit density increases. Total hand value increases with knit density. Double knits show higher total hand values than single knits. Half-milano rib and crossmiss interlock structures have the highest total hand values. Based on the tests results and an understanding of current market needs for dimensionally stable fabrics with a soft hand, we conclude that knit structures with combined miss and tuck stitches exhibit properties appropriate for outer wear fabrics for the winter season.

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References

Brooks, K.A. , Subjective assessment of wet-raised woollen fabric, J. Textile Inst. 82(3), 285-290 (1992).

Chen, P. , Barker, R.L. , Smith, G.W. , and Scruggs, B. , Handle of Weft-Knit Fabrics, Textile Res. J . 62(4), 200-211 (1992).

Dawes, V.H. , and Owen, J.D. , The Assessment of Fabric Handle, Part II: Smoothness, J. Textile Inst. 62(5), 245-250 (1971).

Gibson, V.L. , and Postle, R. , An Analysis of the Bending and Shear Properties of Woven, Double-Knitted, and Warp-Knitted Outerwear Fabrics , Textile Res. J. 48(1), 14-27 (1978).

Hallos, R.S. , Bumip, M.S. , and Weir, A. , The Handle of Double-jersey Knitted Fabrics, Part I: Polar Profiles, J. Textile Inst. 81(1), 15-35 (1990).

Heap, S.A. , Greenwood, P.F. , Leah, R.D. , Eaton, J.T. , Steven, J.C. , and Keher, P. , Prediction of Finished Weight and Shrinkage of Cotton Knit—The Starfish Project, Part I: Introduction and General Overview, Textile Res. J. 53(2), 109-119 (1983).

Heap, S.A. , Greenwood, P.F. , Leah, R.D. , Eaton, J.T. , Steven, J.C. , and Keher, P. , Prediction of Finished Relaxed Dimensions of Cotton Knits—The Starfish Project, Part II: Shrinkage and the Reference State, Textile Res. J. 55(4), 211-222 (1985).

Kawabata, S. , "The Standardization and Analysis of Hand Evaluation," 2nd ed., The Textile Machinery Society of Japan, Osaka, 1980.

Kawabata, S. , and Niwa, M. , The Standardization of the Measuring Condition and Converting Equations for Apparel Fabrics, Report of the Grant Aid for Co-operative Research-A , Project no. 05302018 organized by M. Niwa, Nara Women's University, Ministry of Education of Japanese Government, pp. 125-155, 1988.

10.

Kawabata, S. , and Niwa, M. , "Mechanical Properties and Hand Property for Clothing Materials", textbook of the Kyoto Textile Basic Course , HESC, The Textile Machinery Society of Japan, 1988.

11.

Kawabata, S. , and Niwa, M. , Fabric Performance in Clothing and Clothing Manufacture, J. Textile Inst . 80(1), 19-50 (1989).

12.

Knapton, J.J.F. , Knitting Performance of Wool Yams: Effects of Yarn/Metal Friction, Stitch Length, and Cover Factor on Knitting Performance , Textile Res. J. 38(1), 22-28 (1968).

13.

Knapton, J.J.F. , Ahrens, F.J. , Ingenthron , W.W. , and Fong, W. , The Dimensional Properties of Knitted Wool Fabrics, Textile Res. J . 38(10), 1013-1026 (1968 ).

14.

Knapton, J.J.F. , Geometry of Complex Knitted Structures, Textile Res. J. 39(9), 889-892 (1968).

15.

Korean Industrial Standard Association, Korean Industrial Standard 0512, 1976.

16.

Kwon, O.K. , and Kim, T.G. , Effect of Knitting Condition on the Properties of Interlock Knitted Fabrics (II) J. Korean Fiber Soc. 31(6), 465-473 (1994).

17.

Li, Y. , Keighley, J.H. , Mcintyre, J.E. , and Hampton, I.F.G. , Predictability Between Objective Physical Factors of Fabrics and Subjective Preference Votes for Derived Garments , J. Textile Inst. 82(3), 277-284 (1991).

18.

Matsudaira, M. , and Matsui, M. , Features of Mechanical Properties and Fabric Handle of Silk Weaves, J. Textile Inst . 83(1), 133-143 (1992).

19.

Matsudaira, M. , The Effect of Fibre Shape and Fibre-Assembly Structure on Fukurami of Silk Continuous-filament Fabrics, J. Textile Inst. 83(1), 24-34 (1992).

20.

Macgahzy, Y.E. , and Broughton, R.M. Jr. , Regressional Observations of HVI Fiber Properties, Yarn Quality, and Processing Performance of Medium Staple Cotton, Part I: HVI Fiber Parameters, Textile Res. J . 62(4), 218-226 (1992).

21.

Postle, R. , Dimensional Stability of Plain-Knitted Fabrics, J. Textile Inst. 59(2), 65-77 (1968).

22.

Skelton, J. , and Schoppee, M.M. , Frictional Damping in Multicomponent Assemblies , Textile Res. J. 46(9), 661-667 (1976).

23.

Winakor, G. , and Kim, C.J. , Fabric Hand: Tactile Sensory Assessment , Textile Res. J. 50(10), 601-610 (1980).