What is the selection of the needle
信息來源：本站 日期：2012/6/19
1.When considering the strength of the needle itself, use a thinner needle as far as possible.
2.The heavy penetration resistance of thick material is large, so as to prevent the broken needle should choose the thicker machine needle with strong stability, and the thicker machine needle is not easy to stab the thicker seaming fiber.
3.Thin material puncture resistance is small, to prevent the seams of the needle hole, affect the appearance of sewn material, can choose thinner needle.
4. The stitches should be smooth, without sharp puncture, and the needle-tip is obtuse to prevent damage to seaming fibers.
When the needle is selected, select suture.There are dull cotton, cotton-polyester, blends, polyester and rayon, which are usually made of two, three, four, six strands of single yarn.
The direction of twisting can be divided into s twist and Z twist.The flat sewing machine adopts the z-twist line, the quality of the s-twist line can be applied on other sewing machines.Cotton sewing thread, good sewing,
But in washing, shrinkage is larger than synthetic fiber, and its strength, chemical resistance and abrasion are worse than synthetic fiber. High quality mercerized cotton thread is expensive.
Therefore, cotton sewing thread is rarely used.Short fiber polyester sewing thread cost is low, suture stability, durability and sewing are good, so it is suitable for all regular dress sewing.
The sewing machine used for sewing thread is usually cotton thread, but because of the high cost of cotton fiber now, it is usually replaced with polyester thread.
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