Adhesives Research (AR) has introduced new bonding technologies for bus bar, solar cell junction boxes and encapsulation barrier applications in crystalline and thin-film PV modules. The pressure-sensitive adhesive tapes (PSA) are said to present a respectable alternative to more traditional bonding methods with benefits such as ease-of-handling, continuous roll formats and an easy clean up.
The ARclad 92446 and ARclad 92709 PSA’s have been specifically designed for solar cell junction box applications. The company’s die-cuttable foam tape product is laminated to the junction box, which AR states creates a long-term bond directly to the glass. The PSA’s are said to perform in temperatures up to 248°F, are heat and moisture resistance, feature a 08.00mm closed cell foam, double-faced construction and 50μ clear polyester release liner.
AR has also presented its barrier adhesives for flexible thin-film PV modules. The company maintains that its PSA technology is easier to use, while providing strong, flexible bonds in the form of a “benign, low-outgassing, non-corrosive and electrically clean adhesive.” The PSA is active at 212°F and is UV resistant.
The ARclad 92708 was developed as a PSA for bus bar technology and is supported by a tin-coated copper foil. The ARclad92708 is a 0.004mm single-face foil, coated with 50μ of enhanced, highly conductive acrylic adhesive. AR claims that its PSA provides a firm conductive bond and lessens micro-movements that can endure thermal cycling and high damp-heat conditions.
Adhesives Research additionally debuted its ARclad 90038 PSA tape with 0.04mm tin-plates copper foil backing for bus bar applications. The company advised that it can supply different PSA products for PV module applications, which complement the ARclad 90038 including electrical interconnection, wire management, bonding and assembly and encapsulation.