What are the key process points to pay attention to when adding compatibilizers in practical processing applications?

To successfully apply compatibilizers, the following points must be noted:

1. Addition Ratio: More is not always better. There is usually an optimal addition range (e.g., 0.5%-8% of the total resin amount). Too little may be ineffective, while too much can cause side effects or wasteful costs. This must be determined through experimentation.

2. Mixing Uniformity: Compatibilizers must be fully melted and mixed with the base material during the blending process to effectively migrate to the interface and function. Ensuring a good mixing process (such as shear and dispersion in twin-screw extruders) is crucial.

3. Processing Temperature: For reactive compatibilizers, the processing temperature must ensure that the material is fully melted without causing decomposition of the compatibilizer or base resin, facilitating interfacial reactions.

4. Formulation Synergy: Pay attention to the interaction between the compatibilizer and other additives in the formulation (such as lubricants and stabilizers) to avoid negative effects.