GTS products are found in a wide range of automotive applications. Customers use our competitive PET materials to manufacture flexible wiring systems for wing mirror heaters for example. High temperature adhesives have been developed for front and rear LED lighting systems using PEN and Polyimide.
Windscreen connectors are manufactured using specialised black polyimide film.
LED front-light material: Coverlay with 25µm black, high-temperature epoxy on 50µm PEN
Project Target: To develop a black high-temperature Epoxy adhesive for a LED front light
Project Set-up: Several known adhesives were identified as candidates, based on previous design knowledge. A comparative study was arranged based on DOE (Design of Experiments) techniques.
Project Execution: Samples of laboratory products were aged and tested for peel strength at various times up to 1000 hours, with the criteria for acceptable behaviour set at a peel strength greater than 0.7 N/mm. A number of adhesive formulations were discarded as they showed a reduction of bonding during the ageing period. Others were adjusted and re-tested. The experimental work was completed in three months.
Project Result: One formulation proved outstanding with regard to both temperature and humidity resistance and was able to meet the customer-specified parameters. Following the laboratory work a prototype was manufactured, technical data sheets written and the customer received pre-production material to produce flexible circuits for qualification with the OEM.