Einar® coating additives for expandable polystyrene (EPS)

    Einar® 501 is a fine powdered high quality, sustainable antistat
    Einar® 511 is a fine powdered cooling time enhancer
    Einar® coating additives are free-flowing powders with
    high coating efficiency

    Application background

    Expandable polystyrene (EPS) is a lightweight, strong product that offers very good thermal insulation, making it ideal for the packaging and construction industry. It is used for a very diverse range of applications including trays, cups plates and fish boxes. 

    EPS will need a basic formulation of coating additives in order to function efficiently during handling and processing of EPS beads in to final moulded products. GMS, GTS and metal stearates such as Zn- or Mg-stearate make up a very common combination of coating additives that secures antistat protection, improvement of flow properties during processing and pre-expansion and secures better and faster cooling of moulded parts.

    Einar® coating additives

    Einar® 501 is an efficient vegetable-based antistat that will help improve flow properties of EPS beads during storage, transportation and through the pre-expansion step. Einar® 501 is a fine powder with excellent coating properties and the recommended use level is 0.1 - 0.6% depending on EPS bead size. Smaller beads require higher concentrations due to a higher specific surface area.

    Einar® 511 is a cooling time enhancer and will help reduce cycle times in the moulding process. Einar® 511 is a very fine powder and has high coating efficiency and should be used at loading levels of 0.1 - 0.4% to obtain the best performance on cooling time. 

    Einar® coating additive blends

    Blends offer a very convenient way to apply EPS coatings. It is an all-in-one solution where there is no need to handle several different individual products. The complete coating formulation is an easy-to-use pre-blended formulation offering easy dosing and accuracy, better and faster handling and options for additive inventory optimization.

    Your direct benefits

    Other offerings from the Einar® range

    • Einar® 601 for antistatic performance in PE applications
    • Einar® 601 and Einar® 207 antistats and ageing modifiers for PE and PP foam
    • Einar® 601, Einar® 611 and Einar® 211 for antifogging in PE applications

    Contact us and let us help you develop and test the optimum solutions for your EPS coating additives.

    How can we help?

    Our dedicated development laboratory can assist you in your efforts to develop new solutions.

    We offer full technical support that includes measurements of EPS coating additive properties, allowing the process to be thoroughly analysed and understood.

    Hans-Peter Hentze, Senior Scientist

    Get more info in this handout