THE EFFECT OF SELECTED FACTORS ON THE MECHANICAL PROPERTIES OF THE SEAMS FOR UPHOLSTERY COVERS MADE OF SYNTHETIC LEATHER
Keywords:
furniture, upholstery seams, synthetic leather, sewing thread, seam length, seam qualityAbstract
The quality and structure of the covering material of the upholstered furniture is an important factor affecting the properties of the stitched and, thus, the quality and durability of the upholstered furniture. The stitches of the cover layers are considered a critical place of the upholstery, in which deformations and possible damages are most visible. The paper is focused on synthetic leather, which is considered a composite, ecological and sustainable material. The bearer of the mechanical properties is the reverse side formed by the underlying textile. The focus is put on the influence of stitch length (4, 5, 6 mm) in the weft and warp direction of the underlying fabric of the synthetic leather. The stitched joint has higher strength and stiffness in the warp direction, but its efficiency is lower compared to the load in the weft direction. It means that the stitched material carries a greater load than the thread-connecting material. Joints with longer stitches hold the fabric together with less tension. The sewing thread carries higher loads with a longer stitch length. The results of joint strength and failure show that when creating cutting plans, it is advisable to orient the parts of the covering material so that the joint is stressed in the direction of the warp due to the user's load.
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