A reactive hot melt that withstands hydrolysis testing, which was a weakness of urethane-based adhesives.
It is a polyurethane-based reactive hot melt adhesive that does not hydrolyze even after exposure to an environment of 85°C and 95% RH, maintaining the performance of the material.
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basic information
High-performance materials with excellent hydrolysis resistance that can be used in high-temperature and high-humidity environments are increasingly required, such as continuous exposure to 85°C and 85% RH for automotive applications and dead load stress tests in the construction industry (where a sample must not break under a creep load of 1 MPa for one week at 80°C and 95% humidity). Reactive hot melt adhesives possess the functionality of hot melt adhesives, providing initial strength immediately, and then curing with moisture in the atmosphere, which prevents re-melting like traditional hot melts, making them suitable for mass production as materials with very high heat resistance. However, there have been no products that can withstand hydrolysis resistance in recent years. Clavirit is developing reactive hot melt adhesives that can be used in mass production products with hydrolysis resistance that match market demands.
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Applications/Examples of results
Automotive interior Aluminum sandwich honeycomb panel Surgical gowns / textiles Furniture / building materials Laminates
Company information
Krevelit, which has developed many products such as reactive PUR hot melt ahead of other companies, boasts top-class achievements in the field of PUR (polyurethane) adhesives in Europe. Our Japanese subsidiary, Krevelit Japan, has developed a wide range of products based on PUR as a core technology, including reactive PUR hot melts, single-component PUR adhesives, two-component PUR adhesives, heat-accelerated curing adhesives, field-foamed gaskets (FIPG), and coating materials. We provide maximum productivity improvement and support for new product development tailored to the circumstances of our partner companies in Japan.
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