The design of modern textiles for interiors has long sought inspiration, not only in the textile tradition, but also in architecture, construction, graphics, etc. and in industrial design in general. The diploma thesis entitled Design of weft knitted fabrics for upholstery and decoration deals with the connection between Slovenian cultural heritage and interior textiles. The aim of the diploma thesis was to investigate the influence of the material composition (addition of reinforcing filaments) and jacquard structure (back side) on the performance characteristics of knitted fabrics for interior, especially for upholstery and decoration, and to select the optimum material composition of knitted textiles for upholstery and decoration. Knitted patterns were designed with Adobe Illustrator and Paint. Simulations were performed with Blender and Adobe Photoshop. Knitted samples have been produced on an industrial knitting machine SHIMA SEIKI SES 122 RT, gauge 12E in double jacquard structure with stripes or bird's eye backside. For knitting, yarns were selected from a mixture of 50% polyacrylonitrile and 50% wool with a linear density of 36 x 2 tex. To reinforce the structure, polyamide filaments with a linear density of 34 tex were included in the selected samples. The results of laboratory tests have shown that the knitted fabric with a bird's eye back structure and additional reinforcing filaments is best suited for upholstery and decoration, as it has the best stretch and elasticity properties and is most resistant to abrasion and pilling. Compared to knitted fabrics without additional reinforcing filaments, it is less air-permeable, but due to the loop structure it is still porous enough to provide comfort. We confirmed the hypothesis that the type of double jacquard (back structure) influences the air permeability of the product. We also confirmed that the material composition of the knitted structure (filament addition) influences the compactness of the structure, air permeability, elastic properties and resistance to abrasion and pilling. The knitted structure has a greater influence on the elastic recovery of the knitted fabric than the material composition.
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