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.

    Get more info in this handout