L&L Products (Romeo, Mich., USA), a global applied engineering and materials science company, will launch a unique reformable epoxy adhesive film at CAMX. Designated L-F610, it combines the adhesion and mechanical properties of an epoxy with the processing ease of a thermoplastic. L&L says L-F610 will facilitate new opportunities for the manufacture of composite parts, panels and laminates.
With a tensile elongation of 40 percent, this reformable epoxy adhesive film is said to offer high toughness, with better strength and better adhesion than traditional thermoplastic adhesive systems. L-F610 has the ability to not only adhere to many different substrates — metals, epoxy composites, plastics and wood — but can also be readily used for a wide range of dissimilar substrate bonding applications. It can be de-bonded and re-formed allowing parts and components to be modified in existing structures. L-F610 is also dry to the touch and transparent, which reportedly makes it ideal for applications where a good cosmetic finish is required. Unlike epoxy thermoset film adhesives, L-F610 does not require refrigerated storage and has a long shelf life.
In order to explore further applications for this new product, L&L Products has formed a relationship with Hardwire LLC (Pocomoke City, Md., USA), a U.S.-based composite components fabricator. George Tunis, Hardwire CEO, says, “Although thermoset systems have their place in composite manufacturing, thermoplastics are unbeatable in convenience, processing speed, recyclability, and toughness. L&L’s L-F610 is the first film that has a magic blend of toughness, Tg, processing temperature and modulus. It’s perfect for products requiring high stiffness, damping and extreme toughness. Stampable composites, including renewable natural fiber composites are now possible, allowing the entire manufacturing process to be fully automated.”
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