Urine drainage bag valve components control fluid discharge, requiring good air tightness, flexible operation and biocompatibility, adapting to long-term clinical use, no fluid leakage and bacterial growth. Traditional heat sealing has uneven welds, easy valve jamming, while adhesive bonding has poor durability. DaokeDao laser welding realizes precise and firm connection of valve components, suitable for medical-grade PP and PE materials, forming a smooth and flexible weld, ensuring flexible valve opening and closing, no jamming. The weld has high air tightness, no fluid leakage, effectively preventing bacterial intrusion and urinary tract infection risks. The process is clean and residue-free, complying with medical device safety standards, no skin irritation. The equipment supports automated production, with stable quality, suitable for mass production of drainage consumable suppliers, improving product safety and clinical applicability.