DELO's UV adhesive helps to increase the efficiency of 3-D film integration for car HUDs
DELO's UV adhesive enhances the efficiency of 3-D film integration for automotive HUDs augmented reality displays
Augmented reality display technology in cars is growing in popularity, especially in luxury cars these days. Or in self-driving cars, this technology not only helps the driver to make navigational actions, but also warns the driver early about the surrounding situation, and possible dangers, helping people Drive control easier, and safer.
DELO PHOTOBOND UV-curing acrylate adhesive for optoelectronics enables fast and true-color adhesion of holographic film sheets manufactured by Covestro, one of the film suppliers. leading for hologram applications. The automotive industry, like many others, will benefit from rapid roll-to-roll manufacturing technology and better integration of films into applications using holograms.
Augmented reality live display ( AR-HUD) (DELO photo)
Augmented reality lives displays (AR-HUDs) are one of the most important future applications for holographic films, such as Covestro's Bayfol® HX. When these films are integrated into the windshield, the projections merge with the actual situation and are displayed live on the road. Film panels allow for brighter and larger images while reducing installation space.
This hologram technology also offers design freedom and reduces space requirements in automotive rear lights and other automotive lighting applications. Custom holograms, like a warning message that says 'Stop' in the driver's field of vision, can be designed to increase safety.
Regardless of the application, holographic films are very thin, light, and completely invisible in the absence of Bragg diffraction – a condition where, whenever coherent light meets certain requirements, such as exact wavelength. The film typically consists of RGB color-sensitive photopolymers on a transparent carrier film embedded between two protective films.
Low optical interaction, high bearing strength
A prerequisite for high component quality is a low optical interaction between the adhesive and the photopolymer plate. Therefore, the binders must be chemically compatible in such a way that they do not transfer absorption to other wavelength bands when they are combined with the photopolymer. Therefore, they must ensure color fidelity in all conditions.
So far, mainly silicon is used to fix the film layers. Silicones are flexible and high-performance materials; however, in return, this glue has low strength, slow curing, and in some cases, strong air release. During the curing process, they release by-products into the surrounding environment. As a result, it risks affecting further manufacturing processes, many auto parts suppliers are working hard to produce silicone-free components. DELO PHOTOBOND UV acrylate adhesive tested by DELO and Covestro shows highly improved air release compared to silicone and achieves maximum adhesion within seconds under UV light.
"Our holographic films have the potential to push the existing boundaries of automotive lighting capabilities," says Richard Meisenheimer, Application Development Holographic LightGuiding at Covestro. "With UV adhesives, DELO gives our customers another manufacturing option and helps them process the products in their application."
The product is suitable for integrating film into end applications
Rear lighting is one of the possible future automotive features for holograms. To attach them to the most common surfaces in the field, DELO PHOTOBOND OB4116 glue can be used. UV Acrylate Adhesives have low air release and excellent reliability. This is especially evident in its high adhesion values after storage tests, for example in industry-standard tests under conditions of temperature and humidity (+85 °C / 85% RH). ) and cyclical climate tests (-45 °C to +100 °C).
In addition, it allows for active, high-precision alignment of the optics with the LED block or reflector system. DELO PHOTOBOND OB4116 requires no heating to cure, thus protecting temperature-sensitive components and reducing CO2 emissions during the manufacturing process.
Readers can find out more product specifications in the product's TDS by following the link below:
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