The dimensional properties of purl fabrics

The linear relationships between the intercepts and the inclinations of the linear regression equations derived for the relationships of course-spacings and wale-spacings to the stitch lengths of purl fabric, are presented

Warp-knit dimensions

The dimensional properties of fully-laid-in and marquisette warp-knit fabrics were investigated experimentally. It was shown that a tightness point existed in each fabric at which the fabric dimensions did not change with relaxation. This allowed new regression equations giving fabric dimensions more accurately than previously-used equations to be developed

Plain knitted fabric dimensions. II

This second part of a technical feature on modelling the dimensions of plain knitted fabrics aims to examine whether an arbitrary shape fitting to the knitted loop can explain the relaxation mechanisms observed. Following an introductory review of work carried out on physical models, loop parameters obtained by computer according to the proposed model are compared to experimental results on wool samples. The results of the comparison are presented and discussed

Some investigates on tuck knitted fabrics

The basis of the research is to identify fabric dimensions of tuck fabric structures (Half Cardigan, Full Cardigan and Lacoste) after relaxation to assist the process of production planning. Results for dry, wet and wash relaxation are assessed and compared on fabrics knitted from wool, acrylic and cotton yarns, and regression equations produced compared with other published research. Results show that except for the dry relaxed cotton samples, linear regression equations with high correlation coefficients could be applied to the relations between course spacings and stitch lengths measured, and also to the relations between wale spacings and stitch lengths measured

Determination of yarn diameter

The authors describe the importance of, and difficulties inherent in, the measurement of yarn thickness. They measured the diameter under various compression and tension values on or intermediate bobbin of a circular knitting machine. Empirical formulae were obtained for compressed and tensioned thickness of wool, acrylic and cotton yarns

Geometrical model for a newly designed three-dimensional functional rib-knitted cord

A functional rib-knitted cord and the knitting machine for its production were designed having Turkish Patent Institute Applications No: 2011/00438 and No: 2011/00483 respectively. Functions such as mechanical, thermal etc. can be cultivated using the designed cord. Our interest here is to introduce this newly designed cord and to give a geometrical model for this cord. The model is created and drawn to scale by using the 3DS-Max computer graphical program. The model is the general one and can be applied to various applications of the structure of various tightness values; therefore, the direct comparison of the model with any set of experimental findings, depending on the application area of the cord, is left for the future. However, the assumptions about obtaining spirally connected loops of the model are observed to be correct, as the loop shapes are similar when we compare them with the real cord knitted as samples. © 2013, SAGE Publications. All rights reserved

Models for basic warp knitted fabrics Part III: the two guide bar fabrics (Double Tricot, Locknit, Reverse Locknit, Satin, Sharkskin)

Two guide bar warp knitted fabrics are used as technical textile applications nowadays. In this, Part III of these series of papers, models for basic two guide bar warp knitted fabrics are created and given based on Parts I and II. Modeling of warp knitted fabrics started in the 1960s with some basic geometrical models and it was continued with using Non Uniform Basis Spline (NURBS) curves and surfaces. There were discontinuities in the loop parts in early created geometrical models and the NURBS models needed some control points from some sources. In this work instead of using NURBS curves, modeling of warp knitted fabric is attempted by using known curves. During creation of the models, curvature equalities are attained as much as possible, loop connection parts are modeled by having two continuously connected parabolas for the Double Tricot fabric and the loop connection parts of the other two bar fabrics are obtained by applying a sinus square curve to the connection part of the Double Tricot fabric. The models created are versatile and they can be changed and used for special cases. Models created are drawn to scale by using the 3DS-Max Computer Graphical Program. At first glance, it is seen that the model shapes are similar to the real fabric structures, which can be observed on photographs of them