1) Heat resistance of composite stabilizer
The evaluation of initial heat resistance or long-term heat resistance of the composite stabilizer requires both and is used to exert their synergistic effects. Oxidation is an important factor in thermal degradation and should be considered in combination with antioxidant resistance.
2) Processability of composite stabilizer
Different molding processes have different requirements for composite stabilizers. For example, when calendering, it is hoped that the mixture is easy to plasticize (gelation), non-stick roller (release, lubrication) and no chromatographic coating phenomenon; During extrusion and injection molding, it is hoped that the mixture has lubricity, fluidity and easy demoulding. Therefore, it is necessary to choose according to the actual situation.
3) Compatibility of composite stabilizer
The composite stabilizer has good compatibility in polyvinyl chloride and is not easy to seep out. Exudates can affect the appearance and physical properties of the product, as well as bonding, welding, printing and surface decoration.
4) Transparency of composite stabilizer
Transparent polyvinyl chloride materials will slowly become cloudy and opaque for a long time. Therefore, the selection of a composite stabilizer with good transparency and uniform plasticization is a very important factor in the manufacture of transparent products.
