Einar® coating additives for expandable polystyrene (EPS)

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

• Einar^® 501: Efficient antistat protection
• Einar^® 511: Efficient cooling time enhancer
• Fine powders with high coating efficiency
• Easy-to-use coating blends
• Worldwide approved for food contact
• Consultancy and technical evaluations available from our technical team

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.