Under the specified conditions, the ability of high-strength threads to form good stitches while maintaining certain mechanical properties, called sewability, is a comprehensive indicator for evaluating the quality of sutures. According to the material, thickness, structure, color, sewing style, sewing equipment or means of the material to be sewn, select the type and specification of sutures and needles. Generally, the following principles can be followed:
1. Coordinate with the characteristics of the fabric
It can ensure the uniformity of shrinkage rate, heat resistance, abrasion resistance, durability, etc., and avoid shrinkage caused by excessive differences between threads and fabrics. Generally, thin threads are used for soft and thin materials with small needles, and thick threads are used for hard and thick materials, which are equipped with large needles.
2. Coordinate with sewing equipment
The lockstitch machine uses left-handed stitches, which can be twisted during sewing to maintain the strength of the stitches.
3. Coordinate with stitch form
The bag (stretch) sewing machine uses fine cotton thread, the sewing material is not easy to deform and wrinkle, and the chain stitch is beautiful and comfortable. Double stitches should use sutures with good extensibility. The crotch seam and shoulder seam should use firm stitching. Buttonhole stitches should be durable stitches.
4. Coordinate with the type of clothing
Special-purpose clothing, such as elastic clothing, needs to use elastic nylon thread, and fire-fighting clothing should use high-strength thread with heat-resistant, flame-retardant and waterproof treatment.
Post time: Aug-12-2022