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Friday, 20 September 2019
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Raw materials & technologies, Raw materials

New adhesives for bonding of displays

Wednesday, 24 January 2018

Delo extends its product range with two adhesives that are suitable for fixing display frames – a one-component, light-activated urethane polymer and a two-component polyurethane hybrid.

Displays are omnipresent – different adhesives can be used for bonding display frames. Source: Delo.

Displays are omnipresent – different adhesives can be used for bonding display frames. Source: Delo.

Displays are omnipresent – whether in smartphones, in vehicles, or as touchscreens of control units. However, different adhesives can be used for bonding display frames, cover glass, or for joining display panel and housing.

No need for additional heat curing

"Delo Photobond LA4860" is a modified urethane polymer. The curing mechanism is based on light activation with subsequent humidity curing. Thanks to the novel curing mechanism, opaque components such as display frames, which often have a black mask on the edge areas or are bonded to the housings, can be joined without the need for additional heat curing. The solvent-free adhesive can be used at temperatures ranging from -40 °C to +110 °C and has tension-equalizing characteristics thanks to an elongation at tear of 350 %.

Sealing large bonding gaps

Another product used for bonding display frames and housings is "Delo-Pur SJ9356", a polyurethane-based adhesive, free of isocyanates and silicones. The two-component adhesive cures at room temperature and reaches its initial strength after approximately 4 hours. Its flexibility ensures stable and tension-equalizing bonds and seals, even with dynamic loads. The adhesive's flow resistance and wet adhesion makes it well suited for sealing larger gaps (> 2 mm), thus protecting components permanently against humidity and dust. "Delo-Pur SJ9356" features a temperature range from -40 °C to +105 °C and an elongation at tear of 120 %.

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