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Coating & Laminating

Using silicone coatings to increase slip performance and for greater film protection on electronics

Chinaplas 2016 its new MB25-035 Masterbatch, designed to reduce the coefficient of friction (COF) in high-speed form-fill-seal (FFS) packaging operations. This advanced silicone-based formulation


was developed as an alternative to organic additives, where slip performance is known to degrade over time and at elevated temperatures. Used as a slip additive for low- density polyethylene (LDPE) blown film, Dow Corning MB25-035 Masterbatch only needs to be incorporated in the outside layer of the film, unlike organics that are used in all layers. This saves money and prevents migration into package contents. Additionally, MB25-035 prevents die build-up and gel deposition, and disperses easily and completely for optimal slip performance. “Dow Corning has taken the lead in

developing a next-generation slip technology to help manufacturers around the world address the demands and stresses of high-speed, high-volume FFS processing,” says Christophe Paulo, global segment leader, plastics and composites for Dow Corning. “Our new MB25-035 Masterbatch offers superior performance – from smooth dosing to extended slip performance to the elimination of troublesome build-up – enabling our customers to optimise their productivity and avoid the interruptions commonly caused by competitive products, particularly organics.”

ow Corning, one of the global leaders in silicones and silicone- based technology, launched at

ADVANTAGES OVER ORGANICS Commonly used organic slip additives, including erucamide and oleamide, rapidly migrate to the film surface and dissipate in a short period of time, and because of this delays between film extrusion and FFS operations can result in a loss of slip performance. Organics also lose effectiveness at elevated temperatures, such as exposure to hot foods. They can migrate between film surfaces during rolling and storage, a common issue in film applications that can influence the downstream process that packaging materials usually undergo, such as printing, sealing and handling. Unlike organics, Dow Corning’s

specialised formulation prevents the migration of the slip additive between film surfaces during rolling and storage. MB25- 035 retains COF reduction values at low loadings, for example, 0.2 COF in film against steel contact at three per cent loading. Additionally, the new product does not exhibit stickiness and enables smooth feeding into the extruder. Further, it does not build up on extrusion dies or deposit gels on the film surface.

SAFE FOR FOOD PACKAGING Dow Corning MB25-035 Masterbatch is compliant with US Food & Drug Administration (FDA) and European Union (EU) 10-2011 food contact requirements, which are emulated in many Asian nations. It is also cost-effective due to its ability to use low loadings, its incorporation in only

Launch of silicone-based PSAs and coatings E

lsewhere, at the recent Labelexpo Americas exhibition, Dow Corning,

introduced to the North American market a comprehensive portfolio of pressure- sensitive adhesives (PSAs) and coatings for protective films. The new products that were on show have been designed to help customers optimise the performance of protective films used in electronics processing, assembly, shipment, storage and aftermarket applications. More broadly, they underscore how Dow Corning is enabling its customers to stay ahead of the latest electronics industry trends. “Protective films utilising silicones already

play a critical role in optimising device quality, reducing waste during manufacturing and enhancing the end-user experience,” says Joanna Giovanoli Potts, Americas market manager, packaging at Dow Corning. “Emerging electronics trends require new types of protection, making it even more important to find the right PSAs and coatings. Dow Corning gives its customers an

24 November 2016

exceptionally wide array of material options to meet current and future needs, with advanced performance properties.”

SILICONE HARD COATING FOR PET FILM At the event, the company had on show its AY 42-260 coating for polyethylene terephthalate (PET) film. This ultraviolet-cure silicone hard coating surpasses acrylate coatings in water and ink repellency, mar resistance, hardness, anti-graffiti performance and ease of cleaning. The use of AY 42-260 on PET substrates can help preserve the aesthetics, performance and value of consumer electronics.

SILICONE PSAS IN THE SPOTLIGHT Dow Corning also launched six PSAs that are engineered for industrial and aftermarket screen protection. Although each has specific properties, they share common advantages over competitive organic PSAs, including better wet-out and heat resistance; more stable adhesion and anchorage over

the outer layer of multi-layer films and its dispersion that enhances slip performance. Engineered for LDPE resins and blends,

and designed to be compatible with linear low-density PE (LLDPE) for FFS and lamination as well, Dow Corning MB25- 035 is supplied in easy-to-dose pellets and is available globally.

time; and cleaner removal without residues. There is a whole host of new PSA grades

that are designed for protective films used in processing and assembly of electronic devices. They offer a range of adhesion levels to meet the needs of different customer applications. Dow Corning offers more than 7,000

products and performance-enhancing solutions to serve the diverse needs of more than 25,000 customers worldwide.

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