The function and precautions of calcium stearate in PVC
Release time：
2021-11-12
Calcium stearate is a widely used additive, designed to many industries and fields. It is used as heat stabilizer for PVC, lubricant for various plastic processing, release agent, etc.
Calcium stearate is a widely used additive, designed to many industries and fields. It is used as heat stabilizer for PVC, lubricant for various plastic processing, release agent, etc.
When used as a lubricant in PVC products, it is usually used as an internal lubricant. The use of calcium stearate alone in the formula can accelerate the plasticization, improve the melt viscosity, increase the torque, and have a certain release effect. When calcium stearate and paraffin are used together, it can show a strong synergistic effect, strengthen the lubrication effect, and reduce the material torque value by a lot.
In the use of calcium stearate, attention should be paid to the following: 1. In the preparation of transparent products, pay attention not to add too much, otherwise it will lead to poor transparency. 2. When used as calcium and zinc stabilizer, the proportion should be appropriate to ensure the balance between initial thermal stability and yellowing resistance. 3. When preparing lead salt stabilizer, if the proportion of calcium stearate is too high, it is easy to appear plastic corner, resulting in the strength of mechanical products. 4. The addition of calcium stearate will affect the decomposition temperature of foaming agent, and the amount of stabilizer should be appropriately increased during use.
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Hebei Keao Plastic Co., Ltd
Specializing in the development and production of PVC stabilizer
Hebei Keao Plastic Co., Ltd. produces PVC stabilizer, polyethylene wax, zinc stearate and calcium stearate. The products can be used for PVC profiles, cable materials, pipes, pipe fittings, plates, foam boards, films and other PVC products.
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