Laminating radiation-cured adhesives

Actually, this suggestion serves to introduce the subjects of microwave and radio frequency radiation. RF radiation is being used to cure adhesives on laminates for furniture and for drying coatings, while microwave has been used to vulcanize rubber, convert plastics, and dry inks. 

Photomer . [Harcros UK] Acrylic derivs. radiation-curing resins for inks, varnishes, glass lamination, oriented polypropylene film lamination, coatings fw plastics, blister pack adhesives. 

Keywords Acrylates Crosslinking Dual cure Epoxides Glass laminates Interpenetrating polymer networks Isocyanates Photo initiated cationic polymerisation Photoinitiators Photopolymerisation Pressure sensitive adhesives Release coatings Structural adhesives Thiol/polyene UV radiation curing Vinyl ethers. 

Laminating adhesives generally bond clear laminate plastic films. As long as the films are clear, the adhesive can be cured by UV energy if they are opaque, electron beam radiation is a better choice. 

Chem. Descrip. Ethoxylated, nonyl phenol methacrylate Uses Monomer for adhesives (pressure-sensitive, laminating) functional intermediate in metal coatings, fiber optics, inks, stereo lithography, and optical illusions reactive diluent for radiation and peroxide cure applies. Features Good pigment/tiller wetting good tackitier compat. 

When UV-curable resins are used as laminated adhesives to protect three-dimensional objects having complex shapes, it may happen that some remote areas wiU not be accessible to UV-radiation and therefore remain uncured. To address the issue of such shadowed areas, dual-cure systems combining UV-irradiation and thermal treatment have been developed [71]. They contain two types of reactive functions a UV-curable functional group (usually an acrylate double bond)... 

Laminating adhesives The cross linking achieved by radiant energy enhances the temperature, solvent and shear resistance of hot-melt adhesives with limited effect on critical adhesion properties such as tack and peel. Hot-melt adhesives, especially block copolymers, are also easily cured by EB and UV radiation. These hot-melt adhesives are used as laminating adhesives. 

UV curable laminating adhesives are currently used to bond clear films to various plastic films, papers and foil substrates. Typically, this takes place through the application of the adhesive to the clear film and then onto the second substrate surface. The adhesive is then cured by exposing it to UV radiation through this clear film. 

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