Improved antistatic properties in plastic sandwich components
The aim of the project is to optimize the electrostatic properties of plastic molded parts using sandwich injection molding. The localized use of antistatic agents allows material costs to be saved while maintaining the same mechanical properties. In addition, in the application, sandwich processing can extend the duration of action of migrating antistatic agents.
The insulating properties of plastics offer ideal conditions for their use in electrical engineering applications. However, the high surface resistivity can also have negative effects. Due to charge separation, high voltages accumulate on plastic surfaces and can thus lead to electrical discharges in the kilovolt range.
Antistatic agents are used to prevent this. Permanent antistatics are very expensive and must be dosed in high concentrations to be effective. Migrating antistatics are much cheaper, but are not permanently effective and only work under certain circumstances.
The research project investigated how sandwich injection molding can be used to reduce the disadvantages of migrating antistatics and expand their area of application. By introducing the antistatics into the core component of the part, a targeted controlled migration can be set. The localized use of the antistatic agents also allows material costs to be saved and the mechanical properties of the components are not negatively affected. In addition, the duration of action of migrating antistatics can be extended by the sandwich construction.
Duration: 09/2019 - 02/2022