Causes and prevention methods of metal zippers discoloration?

The chemical properties of copper alloys in metal zippers react chemically when exposed to acids, bases, oxidants or reducing agents, and are prone to discoloration. The zipper may change color when chemical residues on the garment chemically react with the zipper element, the slider or the open end of the metal zipper. This chemical reaction is more likely to occur in hot and humid conditions (sew product steam, sealed in plastic bags and stored for long periods of time, etc.). This situation is not a problem with zipper quality. China clothing accessories network Xiaobian share the reasons and prevention methods of metal zipper color change! First, the metal zipper made of copper alloy (copper, copper, brass) changes color: metal zipper will be blackened by metal oxide when used in metal products or wool products. This is because of the processing of bleach on leather leather products and wool products, the process still exists in the product, which can cause discoloration of the metal zipper. Examples of chemical reactions: oxidative bleach (H2O2) → black (CuO) or red (CuO2); Second, the reason for the discoloration of the metal zipper of the bungee strip: the rubber band itself contains sulfide, the bungee has a metal zipper, and the metal Sprint produces Vulcanization (darkening). Examples of chemical reactions: excess sulfide or HS2 gas conditions → black [CuS] III. Contact with acidic or chromium compounds can cause discoloration. Examples of chemical reactions are acidic compounds and chromium compounds [Cr 2 O 3] → black [CuO, red [CuO 2] or blue [CuSO 4]. Fourth, the reason for the discoloration of the hanging electric zipper: Although the zipper head suspension anti-rust treatment has been done in advance, but oxidation is a metal property, in order to reduce discoloration and surface scratching, please use a zipper head to wrap the copy paper. An example of a chemical reaction: wet weather or steam → blue [Cu(OH)2]. 

How to prevent discoloration of metal zippers?

 1. Avoid contact with metal zippers with acidic, alkaline, oxidizing or reducing agents. 2, to avoid ironing clothes for a long time or long-term sealed packaging in plastic bags, because the clothing remains in high temperature, chemicals under high humidity conditions easily with the metal zipper teeth, slider, tail chemical reaction caused by discoloration, if necessary, use Moisture-proof paper, moisture-proof metal zipper to reduce the degree of chemical reaction. 3, the correct washing method: before washing or drying into the dryer, the zipper is closed, the slider is fixed. If the laundry is opened, the top of the top will damage the fabric and the tape will shrink. Alkaline or chlorinated bleaches are coated with a paraffin or oil film using a metal zipper.