With the requirements of national environmental protection, calcium zinc stabilizer has gradually replaced lead salt stabilizer, widely used in the production and processing of PVC products such as plate, pipe, bellows, profiles, pipe fittings and wires and cables, although calcium zinc stabilizer environmental protection, cost-effective, but we still need to master some skills in the use process, in order to achieve twice the result with half the effort.
1. Confirm the green environmental protection of the formula of calcium and zinc stabilizer: It is necessary to pay attention to whether the content of heavy metals (lead, cadmium, tin, barium) can meet the requirements of the product and meet the requirements of the new national standards.
2, calcium zinc stabilizer internal lubrication effect is strong, need to add more external lubricant.
3, the thermal stability of calcium zinc stabilizer is weaker than that of lead salt, the processing window is narrower, and the control requirements are higher.
4. Pay attention to the cleaning cycle in the operation process. The addition of calcium and zinc stabilizer lubricant is large, which is easy to lead to the increase of precipitation, thus affecting the cleaning cycle. For large - scale production impact is greater, to strictly select stabilizer varieties. If it is its own stabilizer, it needs to cooperate with PE wax or oxidized wax with good lubrication effect in the middle and late period. Also strictly control the vacuum degree, can reduce precipitation, prolong the cleaning mold time.
5, a good stabilizer formula and appropriate dosage on the appearance of the product, material properties, aging resistance and so on.