4, fat needle

The needle hole of the needle is adjacent to the diameter by a larger needle number than the ordinary one. Increase the pinhole of the fat needle adjacent to the diameter, two needles than the ordinary thick. It is said that the temperature of the needle is smaller than usual. The extra-large fat needle pinhole is twice as large as the usual diameter.

5, slender needle

The elongated needle begins to taper obliquely near the center of the pinhole. Suitable for sewing very fine fabrics such as silk, acetate fabrics, etc.

6, edge tips

The edge of the edge is mainly used for sewing leather products, and the shape of the tip is ground according to the shape of the wire. The edge of the shuttle has a cutting edge to reduce the resistance of the sewing material. The leather's residual strength (the strength that can be maintained after the leather is pierced) has the lowest loss of cow hide, followed by lambskin, and the calfskin loses the most.

In addition, in garment processing, the specifications of the needle must be adapted to the suture, otherwise it may cause wire breakage or broken needle problems. Therefore, in order to make the sewing machine work smoothly, it is an important part of the reasonable use of the stitching. The excellent stitching must have three basic qualities: stitching, durability and appearance.

Stitching refers to the performance of the suture during the sewing operation, that is, the suture is sewn on the specified sewing material at the highest sewing speed under normal operating conditions, and can be sewn into uniform stitches.

Durability refers to the stress characteristics of the suture during the sewing operation and its durability in the in-line seam. It is resistant to impact, heat and abrasion during sewing, durability under constant washing and drying, and whether it can withstand various physical or chemical tests in various processes. The durability of a suture is its long-lasting flexibility and strength.

The appearance factor refers to the appearance of the stitches before and after sewing. It is characterized by a combination of mating effects on the fabric, neat stitching and color.