Bonding Thermoplastic Polyurethanes (TPUs)

Thermoplastic polyurethane (TPU) Materials are versatile polymers which offer a variety of properties. Key characteristics for different TPU grades include:

• Durability
• Flexibility
• Biocompatibility
• Abrasion resistance
• Robust strength profile
• Thermal stability
• Protection against a variety of chemicals
• Low temperature elasticity
• Ability to withstand impact
• Long-term heat aging suitability
• Load bearing capacity

TPUs can be tailored to meet specific requirements and have proven beneficial in complex applications for the following industries:

• Medical device
• Automotive
• Sports equipment
• Power tool
• Wire and cable
• Electrical
• Electronic device
• Robotic

Some TPU processing techniques:

• Injection molding
• Extrusion
• Blow molding
• Compression molding
• Rotational molding

Recommended Compound Utilized for Bonding TPU:

Master Bond one-part UV17MED was developed for bonding numerous types of TPU. This low viscosity product has a viscosity of 500-3,000 cps and is easy to apply manually or automatically. At least one of the substrates to be bonded needs to be clear with no UV blocking agent. UV17MED can be employed for adhering TPU to dissimilar surfaces. When exposed to a UV light source emitting at a wavelength of 320-365 nm with an energy output of 20-40 milliwatts/cm² cure can be achieved in 20-30 seconds.

UV17MED exhibits a low tensile modulus, an elongation of 50-60% and superior adhesive strength. This unique formulation possesses toughness, withstands thermal cycling, chemical exposure including ethylene oxide (EtO) and is a reliable electrical insulator. Additionally , it has superb dimensional stability, low shrinkage, a refractive index of 1.51 and is serviceable from -80°F to +250°F (-62°C to +121°C). UV17MED passes ISO 10993-5 cytotoxicity testing. It is also highly successful in satisfying the TPU bonding specifications of non-medical organizations.

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