Bonding of automotive glass is generally performed with 1C PUR adhesive on a primedceramic frit or naked glass surface. The aim of this research was to replace the chemistryof the primer with an atmospheric pressure plasma treatment (APPT) with compressedair for cleaning and activation directly before bonding. Characterization of theglass surface was performed with surface energy through contact angle, XPS, TOF-SIMSand adhesive peel bead test. The results show that APPT treatment can clean the surface,improve the wetting, improve the bonding but reduce the number of non bridgingoxygen for the adhesive to bond to. The highest measured spot temperature of theglass during APPT was measured up to 270 °C, but the temperature was depending onprocess parameters. A reduction in non bridging oxygen was also seen during heatingof the reference glass at 100 °C. A further reaction was seen when measured aftera 550 °C heating. A modified APPT treatment with deionized water as precursor wasused. The results show that the APPT with water does not lower the level of non bridgingoxygen and the bonding was further improved.
This is an article is based on parts of research performed within the project Joining of Float glass. The project was fundedby FFI, a partnership programme run jointly by the Swedish state and the Swedish automotive industry. The FFI fundsresearch, innovation and development with an emphasis on climate, the environment and safety.