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