Biocompatibility of film TPU for medical dressings

Thermoplastic polyurethane films exhibit excellent biocompatibility characteristics in the field of medical dressings. This polymer material has a unique micro-phase separation structure, which allows it to exhibit good cell compatibility and blood compatibility when in contact with human tissue. TPU film does not contain plasticizers, has high chemical stability, does not release harmful substances, and complies with the biological evaluation standards of medical devices. Its surface energy is moderate, which can promote cell adhesion and proliferation without causing excessive inflammatory response. In wound dressing applications, TPU films exhibit low allergenicity and low irritation and will not cause secondary damage to the skin. The material has good moisture permeability and antibacterial properties, and can maintain a moist environment on the wound surface while preventing external infection. Through biological evaluations such as cytotoxicity test, skin sensitization test and intradermal reaction test, the TPU film can meet medical grade requirements. In addition, its mechanical properties are similar to those of human soft tissue, with good flexibility and comfortable wearing. It is suitable for medical application scenarios such as wound care products, surgical films and transdermal drug delivery systems that have long-term contact with the human body, providing safe and effective treatment guarantee for patients.