advantages and disadvantages of calcium zinc, lead salt stabilizer
2022-10-29
1. Lead salt stabilizer
Advantage:
Good thermal stability, especially good long-term thermal stability;
⊙Good electrical insulation and weather resistance;
⊙ Low price;
⊙Good processing performance suitable for various processes;
Disadvantages:
⊙Color aberrations cannot be used for transparent products!
Two words: poisonous (ˇˍˇ)
2.Calcium and zinc stabilizer
advantage:
⊙Green products;
⊙ Thoroughly solve the phenomenon of sulfur and lead pollution;
A small amount of lead in the material may be combined with sulfur in the air, especially in high temperature and high humidity places.
⊙Good switching adaptability; if you originally used lead salt stabilizers, replacing other stabilizers may cause cross-contamination, but calcium and zinc stabilizers can dispel your concerns.
⊙ Light weight, can increase the inorganic filler appropriately, reduce costs.
Second, the use of calcium and zinc stabilizers:
⊙Confirm the environmental protection of the stabilizer formula; you need to pay attention to whether the content of heavy metals (lead, cadmium, tin, barium) can meet the product and meet the requirements of the new national standard.
⊙Calcium and zinc stabilizers have strong internal lubrication and require more external lubricants. This is described below.
⊙Calcium and zinc stabilizers have weaker thermal stability than lead salts, a narrower processing window and higher control requirements.
Pay attention to the mold cleaning cycle during operation. The calcium and zinc stabilizer lubricant is added in a large amount, which easily leads to increased precipitation, which affects the mold cleaning cycle. For large-scale production, it has a greater impact, and it is necessary to strictly select stabilizer varieties. If it is its own stabilizer, it needs to be matched with PE wax or oxidation wax with good lubricating effect in the middle and late stages. It is also necessary to strictly control the vacuum degree, which can reduce precipitation and prolong the time for cleaning the mold.
The formula and proper dosage of a good stabilizer have little effect on the appearance, material properties, and aging resistance of the product.
Share to:
