Self-Heating Composite Fabric and Its Application in Sports Injury Protection of Athletes

This work is mainly focused on developing a self-heating composite fabric using the PVF and PPP. Prepare a new functional composite self-heating fabric through core spun method based on the synergy of hygroscopic heating principle and the characteristics of piezoelectricity of tourmaline. PVF with good hygroscopicity and PPP with piezoelectric effect were blended to produce fabrics with continuous heating function. Spandex fiber filament was set as a core to introduce elasticity, and the PVF and PPP were set as a sheath. In order to test the heating insulation properties of the fabric better, an athlete volunteer to be test foe the self-heating properties of fabrics during exercise. The heart rate was used to characterize the athlete's exercise intensity. The fever effect was not particularly obvious when the exercise intensity was low because the human body sweats less, but with the increase of exercise intensity, the heating effect increases obviously. And when the exercise intensity continues to increase, the body releases a lot of heat, which made the heat released by the fabric becomes less obvious. Therefore, the functional composite self-heating fabric is promising materials in sports injury protection of athletes applications.