Under the specified conditions, the ability of a suture to form a good stitch while maintaining certain mechanical properties, called sewability, is a comprehensive indicator for evaluating the quality of the suture. According to the material, thickness, structure, color, sewing style, sewing equipment or means of the sewing material, select sutures and needles with matching types and specifications. Generally, the following principles can be followed:
1. Coordinate with the characteristics of the fabric
It can ensure the same shrinkage rate, heat resistance, abrasion resistance, durability, etc., and avoid shrinkage caused by excessive differences between threads and fabrics. Generally, soft and thin materials use thin threads with small needles, and hard and thick materials use thick threads and 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 stitches, and fire-fighting clothing should use heat-resistant, flame-retardant and waterproof stitches.
kenking.cn