Bulletin of
Vitebsk State
Technological
University

Abstract

The research is devoted to the design of optimal structures, the choice of raw materials and the development of manufacturing technology for contemporary materials (fabrics and knitted fabrics) with preset puncture resistance. The designed materials are applied in the manufacture of protective equipment for fencers (jackets, side pads, mask collars), as they meet the basic requirements of the International Fencing Federation (FIE) and possess a set of useful qualities such as flexibility, specified surface density, relatively small thickness, resistance to repeated wet treatments without deterioration of consumer properties.

For the manufacture of fabrics with a puncture resistance of at least 350 N, it is proposed to use high–strength polyester threads, and for the manufacture of knitted fabrics with a puncture resistance of at least 800 N, UHMWPE (Ultra high molecular weight polyethylene) threads in combination with highly stretchable textured yarns. All the designed structures of fabrics and knitwear are proposed to be made with two-layer weaves.

As part of the work carried out, the relationship between the twist and the indicators of the physical and mechanical properties of UHMWPE threads was determined, and the optimal amount of twist for UHMWPE threads 44 and 66 tex was calculated.

It has been found that the optimal ratio of the bending wave heights of the warp and weft in the fabric layers should tend to 1, otherwise the warp and weft threads will not participate in the deformation process at the same time, which will lead to the destruction of the threads of one of the systems and stretching and sliding without destroying the threads of the other system.

It has been established that it is advisable to knit protective knitted fabrics from UHMWPE threads rather than weaving traditional weaving structures, which is due to a specific combination of UHMWPE properties – ultra-high strength and low coefficient of friction.

Development of optimal structures of textile materials with preset puncture resistance