TPR stands for Thermoplastic Rubber. TPE stands for Thermoplastic Elastomer.
Materials referred to as thermoplastic rubber or thermoplastic elastomer have many of the same properties as vulcanized rubber but can be molded using the same processes and equipment as thermoplastics. Once heated to the required temperature, they can be reshaped and reused. Some manufacturers use the designation TPR for their products, others use TPE—they are, however, the same material with identical properties. There are various types of TPE, but manufacturers usually only state the general designation TPE. An exception is TPE-U, or thermoplastic polyurethane, which in products is mostly referred to as TPU.
TPR / TPE is a lightweight, soft material that is pleasant to the touch. It is very flexible and has excellent resistance to bending. It is non-slip and well resistant to adverse weather conditions, it is resistant to ozone effects, maintains its elasticity even at low temperatures, and offers excellent resistance to many chemicals. It also has excellent abrasion resistance and resistance to cracking. It is resistant to both low and high temperatures. It can be easily colored. It is recyclable, which is another advantage compared to traditional rubbers. It also has good electrical insulation properties.
TPR / TPE compounds are used in the production of running, hiking, skiing, and other outdoor shoes, as well as tactical and military footwear (primarily shoe soles or arches)—here TPU, as mentioned, is often used. Thermoplastic polyurethane offers excellent tear resistance, high abrasion resistance, and resistance to bending fatigue. These are highly desirable properties in footwear, which are also used, for example, in the insulation of wires and cables. TPU is also used to make outdoor mattresses and sleeping pads.
Furthermore, handles of kitchen and outdoor knives, pliers, and other tools are made from TPR / TPE—either the entire handle is made from TPR / TPE, or it's made from another material and covered with a layer of TPR / TPE for a secure and safe grip, or it has inserted TPR / TPE inserts. Other applications include the production of seals, toys, or automotive products. TPR / TPE can also be found in various other areas in different products.