1. Abrasion Resistance
Cables are frequently subjected to friction and scratching during use, causing gradual surface wear. Therefore, material selection based on abrasion resistance is crucial.
TPU plastic raw material boasts excellent abrasion resistance, being more than five times more abrasion-resistant than natural rubber-sheathed cables, making it one of the preferred materials for abrasion-resistant products.
2. Tensile Strength
Polyurethane cables have a tensile strength up to 38 MPa, while ordinary rubber-sheathed cables (one of the most common types of cables on the market) have a tensile strength of only 8-12 MPa.
When cables are used in environments with forced traction, the poor tensile strength of the rubber-sheathed cable makes the core highly susceptible to breakage under external tension.
The excellent tensile strength of the polyurethane cable sheath and insulation provides excellent protection for the core, ensuring its durability.
Tear strength is a material's ability to resist tearing. Generally, TPU has high tear resistance, significantly superior to some commonly used rubber and plastic materials.
4. Bending Resistance
Many plastic cables (such as RVV) are prone to breakage under repeated cyclic stress. Polyurethane cables maintain excellent bending resistance in various environments, making them one of the best choices for repeated bending applications.
5. Hydrolysis Resistance
Polyurethane cables exhibit good water resistance in turbid conditions, showing no significant hydrolysis within 1-2 years, especially the polyether series.
6. High Temperature and Oxidation Resistance
While most plastic raw materials are prone to oxidation at temperatures above 70℃, TPU has excellent oxidation resistance; generally, TPU can withstand temperatures up to 120℃.
7. Oil and Chemical Resistance
TPU is a highly polar polymer material with very low affinity for non-polar mineral oils. It is virtually unaffected by fuel oils (such as kerosene and gasoline) and machine oils (such as hydraulic oil, engine oil, and lubricating oil). Among polyurethane cables, polyester series products exhibit better oil resistance.
8. Low Temperature Performance
Polyurethane cables have excellent low temperature resistance, typically reaching -50℃. They can replace general PVC and rubber-sheathed cables in various fields where they cannot be used due to low temperature embrittlement, and are especially suitable for use in extremely cold regions.
