STUDY REGARDING THE OPTIMIZATION OF THE JERSEY’ S MASS

Abstract

Correct setting of the structure parameters and their relative influences is the basis of technological adjustments which should be done when programming a new article but also during the operation as a means of preventive control for quality protection. The main defects that appear in the knit jersey are determined by the incorrectness of the setting of technological parameters. Beside these parameters may also be considered as parameters of the knitting process some of the technical characteristics of knitting machines as knitting speed which can be adjusted according to the nature and fineness of the raw material and the structure of the knit. The structure of the knit has a direct influence on the appearance, on the dimensional stability, on the rip capacity, on extensibility, weight, thickness and width of the knit. Through a judicious choice of their structure knits can satisfy a number of requirements on physico-mechanical and hygienic functional properties as well as some economic desiderata such as reducing raw material consumption by reducing the mass of the knit (but without affecting quality). The determinations were made on a knit plated jersey made by yarns 50% cotton and 50% polyester, Nm60/1. The knit samples were made on Terrot S 256 4 track machines To analyse the influence of the knitting parameters on the mass of the jersey was used a mathematical model that expresses the correlation between the knit mass, in g/m as dependent variable (response) and the vertical density, in courses/10mm and the number of turns, in rot/min as dependent variables.

Keywords

• mass
• knitting
• mathematical model
• structure parameters
• speed
• vertical density