DEMCOMELT 80650 is a hot melt pressure-sensitive adhesive (PSA) designed for self-adhesive seal strips on envelope flaps and padded envelopes, and for magnets, inserts, and complex nested designs in rigid box production. This yellow thermoplastic formulation provides instant bonding with excellent cold tack, high peel adhesion, and good thermal stability across diverse applications.
DEMCOMELT 80650 handles applications that standard adhesives can’t, from high-volume envelope production to complex luxury packaging with inserts, magnets or nested components.
Hot melt adhesives solidify rapidly on contact with the substrate, creating an immediate bond that allows for fast production speeds without waiting for drying or curing. This speed advantage makes DEMCOMELT 80650 particularly efficient for high-volume envelope production where throughput is critical. The very strong bonding capability suits applications where components need secure attachment in rigid boxes, including magnetic closures, foam inserts, plastic components or nested designs. This reduces failures from components coming loose and provides the bonding strength necessary for demanding applications.
The high peel adhesion creates secure closures that resist accidental opening on envelopes whilst preventing components from lifting or separating even under stress in rigid box applications. This proves particularly important for magnetic closures or inserts that will be opened and closed repeatedly during use, ensuring components remain securely attached throughout the product lifecycle.
The formulation maintains its adhesive properties and bonding performance across the temperature ranges typically experienced during storage and distribution. Good thermal stability means the adhesive performs reliably across temperature variations. Envelopes won’t accidentally seal in warm conditions, yet they provide reliable closure when pressed together, making them suitable for global distribution and varied climate conditions. This matters for luxury packaging that might be stored or transported in varying conditions without losing adhesive performance.
DEMCOMELT 80650 is a hot melt pressure-sensitive adhesive supplied in pillow form for easy handling and melting. Once applied, the adhesive cools and solidifies within seconds, forming a pressure-sensitive layer that remains tacky at room temperature.
For envelope applications, the adhesive is applied to the envelope flap where it develops full tack within 2-3 seconds of cooling. The formulation has been developed specifically for applications where the adhesive must provide instant tack when the release liner is removed, yet maintain that tack over the shelf life of the envelope. For rigid box applications, the higher viscosity suits applications requiring thicker adhesive films or vertical surfaces where lower-viscosity adhesives might run, making it reliable for magnets, foam inserts, plastic components and complex nested designs where standard adhesives would fail.
The pillow format melts cleanly without generating excessive fumes and maintains good pot stability during extended production runs. The viscosity at application temperature provides good flow characteristics for uniform coating whilst minimising stringing and cobwebbing that can interfere with clean production. The yellow colour provides visibility during application. For manufacturers producing high-volume envelopes and premium packaging with complex closures or inserts, Demcomelt 80650 provides the necessary performance characteristics.
Rigid / Luxury Boxes, E-Commerce, Print Finishing, Bedding and Mattresses, Envelopes
Hotmelt Adhesive
Yellow
Hot melt coating equipment
N/A
N/A
150-180°C
N/A
Pillows
Various Materials, Paper, Card, Foam, Bubble Wrap, polyethylene films, Plastics
Hot melt adhesives require specific safety precautions due to application temperatures. Apply appropriate safety procedures for hotmelt adhesives at elevated temperatures. Use heat-resistant gloves and protective clothing when working near application equipment or handling hot adhesive or equipment. Molten adhesive can cause severe burns on contact with skin – do not touch equipment surfaces or adhesive directly. Set equipment within the specified temperature range to prevent burns. Maintain adequate ventilation to manage vapours generated during heating and provide ventilation in application areas. Install appropriate guarding on hot melt equipment to prevent accidental contact. Keep water away from molten adhesive to prevent violent reactions.
Allow equipment to cool adequately before cleaning or maintenance. Store in cool, dry conditions away from direct sunlight and heat sources. Review the Safety Data Sheet for complete safety information, guidance, and emergency procedures.
DEMCOMELT 80650 should be melted in thermostatically controlled hot melt equipment depending on equipment and application requirements. Avoid overheating as this can degrade the adhesive and affect performance. The adhesive develops full tack within 2-3 seconds of cooling. The higher viscosity suits applications requiring thicker adhesive films or vertical surfaces in rigid box applications where lower-viscosity adhesives might run.
Test on specific combinations of materials before full production to confirm compatibility and bond strength. Ensure application equipment is properly maintained to achieve consistent coating patterns. Once melted, avoid holding adhesive at temperature for more than 8 hours as prolonged heating can affect properties.
Store pillows and unopened packages in a cool, dry place. Clean equipment with appropriate hot melt cleaning solvents whilst adhesive is still molten. The indirect food contact version meets regulations for packaging containing food products.
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