If the belt cr6 exceeds the standard, it needs to be treated. Permanent removal of hexavalent chromium from conveyor belt cr6 can distinguish different grades of products and different product characteristics. If it is leather, the hexavalent chromium of belt leather will exceed the standard, and the hexavalent chromium of finished products will exceed the standard. The hexavalent chromium treatment on leather can be treated quickly because the treatment area of leather is relatively wide. Whether the color of leather will change needs to be considered in the treatment of finished products. How to permanently eliminate cr6 in leather? For the products in the raw material stage of product treatment, 500g/ 1000g of hexavalent chromium scavenger in Akaao-C6R-N2 (A/B) aluminum foil bag is directly added into the raw material, and the ratio of11g:10g is as follows. When ready, put the leather raw materials into the drum and roll them. In case of tanning, when cleaning after fatliquoring, use AO-C6R-N2(A/B), the liquid ratio is 100%, the dosage is 0.3%- 1% of the dry skin weight, and the temperature of warm water must be controlled below 70℃. Spray painting: When using AO-C6R-N2(A/B), it is necessary to prepare 1L aqueous solution (650g+ water +350g isopropanol), then add 3- 1 1g N2, and then transfer it to a spray gun for use, with the dosage of1gn2.
Cr6 of the belt exceeds the standard: If the belt product is in the semi-finished or finished product stage, put the original solution of I50 hexavalent chromium treatment agent into the spray gun and spray it on the back of the leather product, starting from the back (rough surface) until the other side is cool and wet, and then spray it slightly (partially) on the surface. Pigment finishing agent contains hexavalent chromium, so the surface should be sprayed slightly. ) If the leather product is light in color, at this time, the surface does not need to be directly sprayed or wiped.