Introduced in the 1990s in the footwear industry, polyurethane reactive hot melt adhesives – PUR or PURHM – react with moisture in the air and create strong crosslinks, enabling them to deliver excellent bonding characteristics and durability. In adhesive technologies, PUR hot melt is the popular solution for bonding applications relating to packaging and woodworking.
At Henkel, adhesive experts have undertaken a very smart move in the footwear manufacturing industry via an innovative solution entitled single-side PUR adhesives. This approach has been driven by multiple factors including sustainability, consumerism, automation and resource scarcity.
A polyurethane reactive hot melt adhesive (PUR) is:
- 100% solid
- Solid at room temperature and fluid when heated
- Applied in its molten state by specific applicators
- Isocyanate groups cross-link with moisture
- Still solid when heated again after curing
- A unique solution in footwear manufacturing from Henkel
Productivity
Cost
Sustainability
- Applied without solvents, which not only complies with environmental & health protection but also simplifies and compacts production lines thanks to the absence of a drying process
- One-component adhesives cure with moisture in the air, saving energy and improving resistance to heat, oil, solvents, water etc.
- Good bonding strength with a single-side adhesive application, improving adhesive mileage, reducing labour costs through automation, and increasing production efficiency
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