Office Chair Leather Sewing
The process of sewing leather for office chairs mainly includes steps such as raw material selection, pattern making and leather cutting, adding cotton material, sewing the leather surface, pressing decorative lines, adding fixing components, and inspection and covering.
In the raw material selection stage, the factory purchases leather rolls that have undergone preliminary processing such as tanning and dyeing. Common types of leather used for office chairs mainly include full-grain leather, corrected-grain leather, and composite leather. After arriving at the factory, the leather rolls undergo strict quality inspection. The inspection includes checking the color uniformity, thickness, softness, and whether there are any defects or flaws on the surface. Additionally, physical properties such as tensile strength, abrasion resistance, and scratch resistance are tested. Only leather that meets the standards is sent to the cutting workshop.
During pattern making and leather cutting, the sewing master performs pattern making and marking on non-woven fabric according to the shape of the foam. Each point is determined, and then a paper pattern is made based on these points. At the same time, a width of about one centimeter is reserved for the seam. Then, the paper pattern is used to cut the leather, and the leather is carefully organized and labeled.
To enhance seat comfort and ensure a flat leather surface, a layer of cotton material is added beneath the leather, with the thickness of the cotton layer varying in different areas.
When sewing the leather surface, a standard seam width of one centimeter is followed. If there is any misalignment of the leather, rework is required immediately, which places high demands on the professionalism of the sewing personnel. Experienced sewing workers use industrial sewing machines to sew the flat pieces of leather into three-dimensional seat cushion covers, backrest covers, and armrest covers. This involves various sewing techniques such as plain sewing and double-needle sewing. The stitches are required to be neat and firm, and the pattern textures at the joints should align naturally.
After the leather surface is sewn, decorative lines are pressed on it. Usually, single or double lines are chosen, or strips can be used instead of decorative lines according to the requirements of the designer or the customer.
After the basic shape of the leather cover is made, fixing strips and zippers are added to ensure the smooth progress of the covering work. Finally, the leather cover is carefully inspected, and after confirmation that there are no errors, it is handed over to the covering master for subsequent covering work.
