This product is a high-frequency electronic tag packaged with polyphenylene sulfide (PPS) material. It is a special tag designed for dry cleaning and other applications, hence it is called a laundry tag. Polyphenylene sulfide (PPS) is a structurally stable high rigidity crystalline resin engineering plastic with advantages such as high temperature resistance, non toxicity, flame retardancy, chemical corrosion resistance, and good insulation performance. It can be used in rigid and durable mechanical products; Require heat-resistant and flame-retardant electrical products; It can also be used in chemical devices that require corrosion resistance. Especially under high temperature, high humidity, and high frequency conditions, it still has excellent electrical performance. Electronic tags with PPS engineering plastic shell sealed and encapsulated by ultrasonic waves have multiple advantages such as high temperature resistance, flame retardancy, chemical corrosion resistance, high rigidity and wear resistance, and waterproofing. They can be applied in harsh environments with high temperature, high humidity, wear resistance, and corrosion resistance, such as laundry shops, car engine maintenance signs, chemical raw material tracking, and many other electronic tag applications.