PUR Glue

PUR glue, or polyurethane reactive adhesive, is a reactive adhesive designed for high-performance and permanent bonding applications. Unlike conventional thermoplastic hot melt adhesives, PUR glue forms an initial bond after application and continues to cure through a reaction with moisture, creating a crosslinked adhesive structure.

Our PUR glue can be formulated for different substrates and production conditions, including wood, plastics, metals, textiles and composite materials. The formulation can be adjusted according to the application method, equipment, substrate, open time and required curing behavior. Our company has more than 20 years of experience developing EVA and PUR hot melt adhesive systems.

For our broader PUR hot melt adhesive solutions, see PUR Hot Melt Glue.

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Strong and Durable Bonding

PUR glue forms a high-strength bond that can withstand mechanical stress and demanding environmental conditions. After moisture curing, the crosslinked bond provides long-term structural stability.

Moisture and Environmental Resistance

PUR adhesives are selected for applications where resistance to humidity, water, temperature changes or chemical exposure is important.

Flexible Bond Line

The cured adhesive remains flexible, helping absorb movement and stress between different bonded materials.

Reactive Curing

PUR glue initially sets after application and then continues to cure through reaction with atmospheric or substrate moisture. This distinguishes it from conventional EVA hot melt adhesives, which primarily solidify through cooling.

Suitable for Industrial Processing

Different PUR grades can be developed for automated production, roll coating, spraying, extrusion or other suitable application systems, depending on the formulation.

PUR adhesive performance varies by grade and application. The following parameters should therefore be treated as product-selection parameters, not one universal specification.

The current PUR product information on our site also uses application-specific specifications rather than treating all PUR products as one formulation. For example, the PUR bookbinding grade lists a different viscosity and softening point from other PUR applications.

For accurate production settings, always use the technical data sheet of the selected PUR grade.

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PUR glue uses a two-stage bonding process.

Initial Setting

After the adhesive is applied in molten form, it cools and develops initial handling strength. This allows the bonded components to remain in position during production.

Moisture Reaction

After initial setting, the reactive groups in the PUR adhesive continue to react with moisture from the surrounding environment or bonded substrates.

Final Crosslinking

The moisture-curing reaction forms a crosslinked structure that provides the finished bond with improved durability, flexibility and resistance to environmental stress.

For applications requiring faster processing, see our Fast Curing PUR Adhesive.

The right application method depends on the adhesive grade, equipment and substrate.

Hot Melt Application

PUR reactive hot melt adhesives are commonly applied using suitable heated adhesive equipment.

Roll Coating

Roll coating can provide controlled and uniform adhesive application on compatible substrates and continuous production lines.

Spraying

Spray application can be used for selected PUR formulations where a controlled coating pattern is required.

Before production, the adhesive should be tested with the actual machine, substrate and application conditions.

PUR glue can be formulated for a broad range of industrial substrates.

Wood and Wood-Based Materials

Suitable applications may include furniture panels, cabinets, plywood, engineered wood and other woodworking components.

For woodworking-specific selection, visit Adhesive for Woodworking.

Plastics

PUR formulations can be developed for compatible plastics where high adhesion and environmental resistance are required.

Metals

Selected PUR systems can be used for metal bonding in industrial assembly applications.

Textiles

PUR adhesive can be used for textile lamination and composite structures where flexibility and durable bonding are required.

Composite Materials

PUR systems are suitable for selected multi-material assemblies where different substrates require a flexible and durable bond.

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Furniture and Woodworking

PUR glue is used where furniture components require durable bonding and increased resistance to moisture and temperature changes.

For specific edge banding applications, see Edge Banding Glue.

Automotive Components

PUR adhesive can be used for bonding selected interior components and multi-material assemblies where durability and flexibility are required.

Packaging

PUR hot melt adhesive is used in selected packaging applications requiring durable bonding and resistance to humidity and temperature variation. Our Packaging Adhesive Applications page covers these applications in more detail.

Bookbinding

PUR adhesive can be selected for premium bookbinding applications, particularly coated paper and publications requiring strong, flexible and durable spine bonding.

See our dedicated PUR Bookbinding Adhesive product page rather than duplicating its detailed bookbinding content here.

Customized Formulations

We can adjust PUR adhesive properties according to substrate, equipment and production requirements, including viscosity, open time, setting behavior and resistance characteristics.

Technical Support

Our technical team can assist with adhesive selection, application conditions and troubleshooting based on the actual production process.

Stable Manufacturing

Adhesive (Shanghai) Co., Ltd. has more than 20 years of experience in hot melt adhesive development and manufactures EVA and PUR adhesive systems for furniture, automotive, packaging and printing applications.

Learn more about our Hot Melt Adhesive Factory.

Quality and Documentation

Certification and technical documentation can be provided according to product grade and market requirements.

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