Adhesive for LED headlights

Delo has developed a transparent adhesive for bonding automotive headlights.

“Photobond OB4210 is characterised by its yellowing stability at high temperatures” according to the company. “Manufacturers of automotive headlights can use it to realise optically sophisticated applications – the  transparent characteristics make it hardly distinguishable from the lens material.”

Transparency is typically retained after a 500 hour storage at +140°C.

It is an acrylic adhesive with “near-instantaneous” UV curing (down to 1.5s), said Delo, suiting it to alignment of lens and other optical systems around matrix LEDs, microlens arrays and digital light-processing systems.

It can be used over -40 to +140°C and has a 35 MPa compression shear strength with polycarbonate, an optical material common in automotive lighting.

Low viscosity (3,000mPa-s) and flowability allow it to be used on larger surfaces.

The adhesive will be presented at the DVN conference in Shangha, which is over 4 and 5 December.