Application of calcium stearate in PVC transparent products

When manufacturing PVC transparent products, the addition amount cannot be more than 0.5 parts, otherwise the transparency will be affected.

When adding calcium stearate to the lead salt composite stabilizer, it is necessary to control the addition amount. If it is added too much, firstly, there will be over-plasticized corners, and secondly, it will affect the lubrication system and reduce the mechanical strength.

In the calcium-zinc composite heat stabilizer system, the ratio of hard calcium to hard zinc and other additives is required. If the ratio of hard calcium is too low, the initial thermal stabilization performance is not good, and if the ratio is too high, the PVC products are prone to yellowing and poor weather resistance. .

Calcium stearate will affect the decomposition temperature of the foaming agent. The decomposition temperature of pure AC foaming agent is 211 °C, and the decomposition temperature of adding calcium stearate is reduced to 162 °C. When using, pay attention to appropriately increase the amount of stabilizer added.

Calcium stearate has strong water absorption, so special attention should be paid during transportation, storage and use. When the moisture exceeds the standard, it can be dehydrated and dried at 120-140 ℃, without affecting the use effect, otherwise it will adversely affect the quality of plastic products.