1, metal zipper made of copper alloy discoloration reason: when used in metal products or wool products, metal zipper will cause part of the tooth blackening phenomenon due to metal oxidation. Zipper manufacturers introduce this because of the preparation of leather, and wool products on the processing of bleaching agent, processing process and residual in the product, the gas of the product will cause the discoloration of the metal zipper.
2, rubber band bundle metal zipper discolation reason: rubber band itself contains sulfide, with rubber band bundle metal zipper, metal chain teeth will produce vulcanization black phenomenon. Discoloration caused by contact with acid or chromium compounds.
3. Matters needing attention: if there is "washing" in zipper garments, it must be indicated on the order that garments require washing. And please note that the fabric should be shrunk before sewing, so as not to cause the zipper to arch and affect the hand feeling. Be sure to fix the position of the puller when washing, otherwise the puller will slide down at will, and the puller will be locked on the left and right teeth.
Wiggle freely according to the strength of "water washing". When the twisting strength exceeds the bearing capacity of a single tooth, the tooth will fall off and the zipper will be damaged. Normal zipper will produce a "not smooth" feeling after washing, can be coated with paraffin wax up and down two or three times, to ensure the smoothness after washing.
This kind of material is mainly polyester based material, the cost is relatively low, is also a kind of zipper that the market likes. The chain tooth of the zipper is spiral, and it is also a special one in the zipper series, so there is no single tooth displacement strength item in its physical index.
