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Understanding Thermoplastic Polyurethane: A Versatile Engineering Material
Thermoplastic Polyurethane (TPU) is a class of polyurethane plastics known for combining the properties of rubber with the processability of thermoplastics. TPUs are widely used due to their versatility, durability, and wide range of mechanical properties.
What is TPU?
TPU is a block copolymer consisting of alternating soft and hard segments. The soft segments are typically formed by polyols (like polyester or polyether), while the hard segments are formed by diisocyanates and chain extenders. This segmented structure gives TPU its unique combination of elasticity, strength, and resistance to abrasion.
Key Properties
Flexibility: TPU remains flexible even at low temperatures.
Elasticity: It exhibits excellent elastic recovery, similar to rubber.