In the field of wearable smart devices, smart bracelets are widely used. Users can record real-time data such as exercise, sleep, diet, etc. in daily life, and synchronize these data with mobile phones and tablets to guide healthy life through data. Polyurethane reactive hot melt adhesive is mainly used for the bonding of touch screens, buttons and decorative parts, and is suitable for various materials of intelligent electronic equipment. It has high bonding strength, good reliability, and is healthy and environmentally friendly. The adhesive of choice for wearable smart devices