Is the TPU transparent elastic band produced by extrusion or by slitting film? The TPU elastic band is sometimes referred to as a transparent elastic band, a transparent elastic strap, a transparent shoulder strap, a transparent film, or a transparent arm strap.
　　TPU elastic bands are produced either by extrusion or by slitting film; however, at present, most are manufactured via extrusion. You can distinguish between the two types based on their appearance: extruded TPU elastic bands have rounded edges and corners, whereas film‑slitted TPU elastic bands have crisp, straight edges that may be sharp enough to cut your hand if not properly finished.