TPU

material

Thermoplastic Polyurethane, an elastomeric polymer combining flexibility of rubber with processability of thermoplastics, offering exceptional abrasion resistance and elasticity.

In Simple Terms

TPU is a flexible plastic that acts like rubber but can be melted and reformed like traditional thermoplastics. It's known for its stretch, bounce-back ability, and resistance to wear and tear, making it ideal for products that need flexibility and durability.

Why It Matters

TPU fills the gap between rigid plastics and thermoset rubbers, offering processors the ability to create flexible parts using standard thermoplastic equipment. Its unique properties command premium pricing and serve specialized applications in automotive, footwear, and medical devices.

Technical Details

TPU consists of alternating hard and soft segments, with hard segments providing strength and soft segments providing flexibility. Shore hardness typically ranges from 60A to 75D. Processing temperatures range from 180-220°C, requiring careful temperature control to prevent thermal degradation. Melt flow characteristics vary significantly with grade selection.

Real-World Examples

Athletic footwear midsoles

Shoe manufacturers specify TPU grades with specific Shore hardness and rebound properties, requiring certificates of analysis for each lot to ensure consistent performance and comfort

Automotive interior trim

Soft-touch TPU films are co-extruded or laminated to rigid substrates, with material traders coordinating delivery timing due to TPU's sensitivity to moisture absorption during storage

Medical device housings

Biocompatible TPU grades require ISO 10993 certification and detailed material documentation, with resin pricing reflecting the specialized testing and regulatory compliance requirements