The so-called nylon zipper ordinary stop, is the metal flat line stamping stop. Injection molding, is the plastic mold injection out. The top stop of injection molding is formed by melting plastic at high temperature. The surface of the block is smooth, the size is standard, and it can not be disassembled and reused twice. It can prevent the replacement of the pulling head. Adhesion strength is also relatively high, not easy to fall off.
Regular check is on metal flat online check, is a certain thickness of metal wire after mold stamping molding, metal stamping products have burr, at the same time, in order to smoothly through the cloth belt forming, stamping metal has a sharp head end on both ends of the line, though C cladding forming bent at the teeth that but will there be any irregular situation, bad product probability is bigger, Sharp protrusion or burr, easy to scratch the skin, especially children's clothing, this requirement is more strict.
At the same time, the metal wire is divided into aluminum and copper, and its adhesion strength and resistance to pull head are not as high as that of injection molding, so it is gradually phased out. High-end zipper nylon zipper gradually adopt U - type stop or injection molding stop. Nylon zipper is a kind of zipper, according to the material of zipper, zipper is divided into three categories: metal zipper, injection zipper, nylon zipper.
Metal zipper teeth are made of copper wire or aluminum wire through the row machine, plastic zipper teeth are made of polyester rice, colored with dye and made through the injection machine, and nylon zipper teeth are made by single wire forming and stitched together. Compared with metal zippers and injection zippers, nylon zippers have low cost, large output and high penetration rate.
The material of nylon zipper is polyester. The glass temperature of polyester is about 220 degrees, and the conventional temperature resistance is about 180 degrees. If the temperature is instantaneous, it can be shu250 degrees in 10-15 seconds, but at this temperature, the material will extremely shrink. After making zipper products, the general ironing temperature is 160 degrees, within 2 minutes or so is appropriate.
