Adhesive for Bonding TPU to TPU? ELAPLUS PUR 1602 Solution for Flexible Material Bonding
ELAPLUS PUR 1602 adhesive can be evaluated for TPU-to-TPU bonding. Key verification items include flexibility matching between the bond line and TPU substrates, interfacial adhesion, and joint stability after repeated flexing. For flexible sleeves, elastic structural parts and industrial protective components, the adhesive shall not only form a reliable bond but also avoid overly rigid local bond lines that restrict product deformation. TPU is a thermoplastic polyurethane elastomer with good abrasion resistance and elasticity, widely used for cable jackets, industrial protectors and flexible structures. Different TPU grades vary in hardness, surface condition and processing method, so the performance of the same adhesive may differ across materials. 1. Why Flexibility Matters for TPU-to-TPU Bonding For TPU assemblies subject to repeated bending or stretching, mismatch in deformability between the bond line and substrate can concentrate stress at the bond edge and shorten joint service life. For TPU parts only for static positioning, selection focuses mainly on adhesion strength and dimensional stability. For dynamic flexible structures, reliability under repeated flexing, peeling and long-term deformation shall be further evaluated. 2. Material Selection with PUR 1602 for TPU Bonding ELAPLUS PUR 1602 is a candidate grade for TPU-to-TPU joints. Suitability shall be verified against material grade, cured adhesive properties and actual service conditions. Application Requirement Selection Focus Recommended Validation TPU flexible sleeve Bond line flexibility and adhesion Flex test and peel test TPU industrial protector Bond area and structural strength Tensile test and environmental ageing TPU sealing structure Continuity of the adhesive layer Seal test and deformation test TPU positioning component Dimensional stability and assembly accuracy Dimension check before and after cure 3. Process Control for TPU Bonding Before bonding, confirm that TPU surfaces are free of obvious grease, dust and processing residues. For different TPU grades or specially surface-treated TPU, compatibility tests shall be…
