what the PVC processing aid

Is known, the thermoplastic resin, the mechanical properties of the final

product with the polymer melt in the conversion process closely related to

the uniformity. Unlike most other thermoplastic resins, rigid PVC particles

due to their inherent structure which carbon black powder  can not be directly processed result.

It requires a high temperature for a long processing time, which in turn

often leads to thermal degradation. PVC resin processing aids to bring a

lot of benefits, mainly with the processing of the melting process and melt

rheology related. Processing aids help to improve the melt adhesion and

uniformity of the melt strength, melt extensibility and melt elasticity.

Processing aids and the polymer structure components affects the

compatibility with PVC, additives, and will change some properties, such as

fluxing properties and lubricating properties. On the other hand, the

processing aid in controlling the molecular weight and molecular weight

distribution of the rheological properties of the melt will play a key

role. The most common processing aids are methacrylic ester polymers. Poly

(methyl methacrylate) (PMMA) of a polymer having a high glass transition

temperature (Tg), and it has magnesium hydroxide  excellent PVC material compatibility, these

properties are beneficial local shear heat generation and transmission,

thus PVC in the melt phase to promote melting.

Melt rheological properties in addition, the enhancement of dispersion and

improve the processing efficiency, and enhance the  chrome oxide overall balance of

various properties (especially viscosity corresponding to the melt

strength), which are new processing aids and the main directions of

research objectives. This development process aids ask the premise with

less the same effect can be obtained, in addition, the necessary uniform

color, the application of the transparent material is also required

material is more easily dispersed and more uniform and transparent.