ブログ について Polyurethane Gains Traction in Industrial Applications for Durability

In the pursuit of high-performance materials, polyurethane has emerged as an indispensable player across industries. This polymer, formed through the reaction of polyols and isocyanates, combines exceptional tensile strength with remarkable impact absorption capabilities. However, with an abundance of material options available, engineers and designers face the critical challenge of accurately evaluating polyurethane's properties against competing materials.

Polyurethane's versatility stands as one of its most significant advantages. Ranging from soft foams to tough elastomers, it adapts to diverse application requirements. The material achieves both high elongation rates and outstanding durability—a rare combination among engineering materials. Despite its lightweight nature, polyurethane delivers impressive tensile and tear strength while effectively absorbing impacts and vibrations, making it ideal for cushioning and damping components.

However, polyurethane isn't without limitations. Ultraviolet radiation and high temperatures pose potential threats, potentially accelerating material degradation. Practical applications therefore require careful selection of polyurethane formulations and appropriate protective measures based on specific environmental conditions.

With excellent moldability, polyurethane finds widespread use across automotive components, furniture manufacturing, and numerous other industries. In environments demanding superior elasticity, strength, and vibration damping, polyurethane remains an essential material choice.

To fully understand polyurethane's advantages and limitations, we compare it against several common elastic materials including EPDM rubber, silicone rubber, thermoplastic elastomers (TPE), and an innovative rubber-like resin (RLR).

Polyurethane distinguishes itself with elongation rates typically ranging between 300% to 700%, allowing significant deformation before fracture. Its hardness can be precisely tuned for specific applications. While EPDM and silicone rubbers achieve comparable elongation levels, they demonstrate different strengths in weather resistance and thermal stability. Recent advancements in weather-resistant polyurethane formulations have expanded options for maintaining high elongation in challenging environments.

Polyurethane offers tensile strength ranging from 10 to 50 MPa—significantly higher than many elastic materials. This strength, combined with adjustable hardness and form versatility (from foams to elastomers), makes it uniquely capable of balancing impact absorption with structural integrity. Certain polyurethane formulations also provide excellent weather and oil resistance, leading to widespread adoption in automotive and industrial components.

Polyurethane outperforms EPDM and silicone rubbers in temperature and oil resistance for industrial applications. However, materials with extremely low rebound modulus and high loss factor—like rubber-like resin—may prove superior for applications demanding maximum vibration damping.

This critical damping metric reveals RLR's exceptional vibration absorption (tanδ=0.9), while polyurethane, EPDM, silicone rubber, and TPE show moderate damping capabilities (0.1-0.35 range). Material selection requires balancing damping performance against other mechanical properties.

RLR's remarkably low 4.5% rebound modulus enables superior impact energy absorption. Polyurethane and other comparators (25-70% range) provide greater elastic recovery, demonstrating the necessary trade-offs in material selection.

Breaking traditional compromises between flexibility and durability, rubber-like resin (RLR) combines elastomeric properties with exceptional scratch resistance, chemical stability, and vibration damping. Its room-temperature curing process enhances energy efficiency during production. Applications span electronic coatings, construction materials, and automotive components, with additional advantages including self-healing capabilities and hydrolysis resistance for long-term reliability.

When designing products, engineers must carefully evaluate tensile strength, elongation capacity, and impact absorption requirements against each material's comprehensive property profile to achieve optimal solutions.