Bezsmertna V. Improvement of the production technology of weft knitted fabrics with predictable properties, made of high–strength threads

The work is devoted to the improvement of manufacturing technology of weft knitted fabrics of high–molecular polyethylene and para–aramid threads with predictable properties. The scientific results obtained in the research process in aggregate allowed to solve an important scientific applied problem of improving existing methods and means of prognostication the characteristics of the structure and properties of weft knitted fabrics from high–strength threads and loss of their strength in accordance with the parameters of knitting on flat knitted equipment. Mathematical models describing the influence of knitting parameters of knitwear on the parameters of its structure and indicators of strength loss of para–aramid and high–molecular polyethylene threads after knitting are obtained.For the first time is used a method of determining the fatigue resistance of high–strength threads due to the action of cyclic loads "stretching–bending–friction", corresponding to the load on the thread during its processing into a knitted fabric (plain weave and rib 1+1) on flat knitting equipment. Geometric 3D models of the structure of prototypes of knitted fabrics (plain weave and rib 1+1), produced from high–strength para–aramid and high–molecular polyethylene threads, in a conditionally equilibrium state and at maximum uniaxial stretch along the wale or course have been developed. The technique of definition of fabric quality indicators in computer modeling systems using three–dimensional geometrical models (3D models) of its structure is offered.