Automotive door water barriers are installed inside the door panel, responsible for isolating rainwater and moisture, protecting internal door locks, glass lifters and wiring harnesses, requiring good waterproof performance, toughness and aging resistance. Traditional adhesive bonding has poor waterproof durability, easy degumming after long-term use, leading to water leakage inside the door and corrosion of internal parts. DaokeDao plastic laser welding provides a permanent waterproof connection scheme for PP and PE water barrier materials, forming a continuous and dense waterproof weld, with waterproof performance reaching IPX7 grade, completely blocking rainwater penetration. The weld has good flexibility, adapts to slight deformation of the door panel during vehicle driving, does not crack or fall off, and has a service life consistent with the vehicle. The welding process is efficient and fast, with a single door water barrier welding time of only 8-11 seconds, suitable for mass production of vehicle assembly lines. Compared with adhesive bonding, it eliminates glue curing time, improves production efficiency by 50%, and reduces material costs, helping automakers improve door component durability and reduce after-sales maintenance rates.
