Common Sense Problems That Should Be Paid Attention To When Selecting Zippers

During the use of zippers, various abnormalities may occur due to incomplete knowledge of zipper products or some improper operations. Here we summarize some common abnormalities in use and corresponding countermeasures. Important tips when selecting zippers Because zippers have different adaptability in different environments, you should specifically mention to the manufacturer when selecting zippers:

I What kind of products are zippers used in Suitcase shoes Boots, ski clothes, raincoats, tents, jeans to be washed or leather goods with high acidity and other special requirements.

II Requirements for zipper components See whether it needs to be free of azo (AZO), nickel, needle inspection, and product environmental protection certificate, such as "Oeko Tex Standard 100". Precautions in the use of zipper products: Please pay attention to the following problems in the use of zippers:

1. Color contrast zipper (fabric is inconsistent with zipper cloth belt, such as white fabric with black and red zipper cloth belt) must be stated when placing an order, and the color fastness must be good. The zipper can be put into production in large quantities after being tested and confirmed before sewing;

2. Nylon zipper is used for PVC fabric or waterproof/skiing fabric (light color). Please note that the fabric will absorb oil stains in the zipper and cause stains on the fabric. When receiving similar orders, please indicate when placing an order: zipper oil yield control shall be carried out and the test shall be carried out before production;

3. The color of the cotton garment with metal zipper changes after dyeing. The discoloration is caused by chemical reaction after acid/alkaline dyeing of the teeth, separating parts, pullers and upper stops. At present, our company can only apply film on metal parts such as pulling head and microphone teeth (this is paid), but it can not completely guarantee that the zipper will not undergo chemical reaction. Please make samples for test first, and purchase large goods after confirming that zipper is suitable for garment manufacturing process.

4. Plating white without nickel and hanging plating white without nickel pullers are used on white cotton materials (such as wool products), which are easy to change color (such as yellowing, black, etc.). The main reason is that they are not cleaned after bleaching and dyeing and react with chemical residues. Please fully clean the fabric to neutral state before production.

5. The effect of 8 # and 10 # resins, metal pullers or larger pull pieces and round pull pieces passing the needle is not good. On the one hand, because of its large volume, in addition, the circular pull piece will produce a magnetic field when testing the probe, which will affect the effect of the probe test.

6. The teeth of the discolored metal zipper turn black and the discolored teeth will pollute the clothes. Once the copper alloy is oxidized, it will turn black... The packaging bag should not be sealed, keep its ventilation, and be careful not to be full of moisture (the effect will be better if moisture proof paper and moisture proofing agent are used).

7. Dyes, polyethylene and synthesis on the migration dyed zipper Leatherwear 、 cloth The plasticizer, binder, oil agent and other components in the resin coating may react and cause migration. The finished products should be separated with paper and kept in good condition.

8. Due to the use of dyed brown zipper or black zipper, the contact part between the cloth and the zipper will be polluted. In the dyeing process of the cloth, the residual acid or oxidant may react chemically, which may cause pollution at the contact part between the zipper and the cloth. Please use fully cleaned cloth and materials.

9. Washing processing 1) After washing processing, the zipper's teeth will change color or the chemicals that corrode the washing processing will weaken the slider. When washing, it is better to use a spring head zipper with strong resistance to washing. In order to prevent the residual acid in the washing process, please fully clean it to the neutral state. With different processing types or drug types, the fabric will weaken, and experiments must be conducted before washing and processing. 2) The self-locking pulling head is damaged after washing. The zipper is washed when it is open, and sundries will enter the pull head, making it easy to be damaged, so please wash it when the zipper is closed.

10. Correct washing method 1) Before washing or putting into the dryer, be sure to close the zipper and fix the pull head. If you open it for washing, the front end of the upper end will damage the cloth and the cloth belt will shrink. 2) The strong alkaline detergent or chlorine bleach will melt the paraffin or oil film on the zipper. Please pay special attention when using.

11. Proper material, temperature and ironing method 1) The temperature of the iron should change with the material, and the zipper also has proper temperature, so as to maintain the strength and beauty of the zipper. 2) When ironing the zipper, be sure to close the zipper properly. The zipper should be fixed in the normal position. Do not let the head and tab of the zipper be placed upside down or stand up. In addition, the ironing should be started only after the cloth is paved, otherwise unexpected things will happen.

12. For other children's products, special attention should be paid when selecting zippers. Please select special top stop.

　　 Precautions for sewing invisible zipper

1. The invisible zipper is sewn with a special sewing machine

2. Both ends of the zipper shall be sewn back

3. The zipper suture shall be sewn in a straight line without line segment jamming

4. Do not sew it on the chain tooth to prevent jamming and opening

5. If the length of the zipper cannot be ordered on time when ordering, please purchase our company's invisible activity code metal zipper precautions

　　◆ Discoloration principle of metal zipper teeth

1、 Chemical properties of copper alloys The chemical properties of copper alloys are chemical reactions when encountering acids, alkalis, oxidants or reducing agents, and are easy to change color. The zipper may change color when the chemical agents left on the clothes react with the chain teeth, the head or the tail of the metal zipper. This chemical reaction is more likely to occur under high temperature and high humidity conditions (sewing products are steam ironed, sealed in plastic bags and stored for a long time, etc.). This is not a zipper quality problem.

2、 Example of discoloration caused by chemical reaction 1 Oxidizing bleaching agent (H2O2) → black (CuO) or red (CuO2) 2. Reducing bleaching agent (Na2S03) → black (CuO, CuS) or red (CuO2) 3. Conditions for excess sulfide or HS2 gas → black (CuS) 4. Conditions for excess CL2 gas → light yellow (CuCl2) 5. Acidic compounds and chromium compounds (Cr2O3) → black (CuO), red (CuO2) or blue (CuSO4) 6. Steam ironing or wet in rainy days → blue (Cu (OH) 2)

　　◆ Different texture clothing Precautions when using metal zippers Wool knitwear

The following methods are usually used for bleaching wool knitwear. 1. Treat with acid bleach (H2O2) or reducing bleach (sulfite). 2. In the post-treatment process of bleaching - shrinkproof treatment or bleaching treatment, if the water washing and neutralization treatment are not sufficient, gases such as CL2 or S2 will be generated, and in case of high temperature (steam ironing), these gases are easy to react with metals. So after bleaching, please use cloth that is clean enough. 3. As the fabric is immediately squeezed and packaged after being steam ironed, the accessories (teeth, pullers, top and bottom stops, etc.) with copper alloy components in the metal zipper react chemically with reagents or gases and are easy to change color. Therefore, the products after steam ironing should be fully cooled before packaging. Inorganic acid, sulfuric acid, chromium compound, aldehyde compound, etc. are usually used for leather processing. The main component of leather is animal protein. It is very difficult to completely remove treatment reagents (inorganic acid, sulfuric acid, chromium compounds, aldehyde compounds, etc.), which is easy to lead to the phenomenon of reagent residues on leather. When these residual reagents come into contact with the metal zipper, chemical reaction will occur, and the color of metal accessories (teeth, pullers, upper and lower stops, etc.) will slowly change. Therefore, use leather that has been thoroughly cleaned and neutralized. Due to the inadequate cleaning treatment after dyeing, the acid compounds left on the dyed fabric are easy to react with the metal zipper and contaminate the fabric. Therefore, please use clothes that completely remove oxidants (neutralization treatment) or have been thoroughly cleaned.

　　◆ When purchasing metal zippers, special purposes and requirements should be noted, such as ordinary water washing, acid enzyme washing, etc.