Hot melt glue Application Video of carton sealing process

When packaging manufacturers need a bonding solution that works not just on plain corrugated boxes but also on challenging coated and laminated surfaces, TONGDE 8078 stands out as a versatile EVA hot melt adhesive for carton sealing engineered for the full spectrum of paper packaging applications. From standard brown kraft corrugated shippers to premium glossy laminated display cartons, this yellow granular formulation delivers reliable bond strength across both porous and non-porous substrates—making it the go-to choice for factories running mixed packaging lines.

What Is TONGDE 8078?

TONGDE 8078 is an EVA-based hot melt adhesive developed by Shenzhen TongDe New Materials Technology Co., Ltd., a trusted manufacturer serving global packaging markets including Germany, Thailand, Ukraine, and Russia. Its granular form and balanced rheology make it easy to handle in standard hot melt tanks and application equipment.

With a softening point of 102±5°C (tested per GB/T-15332), a viscosity of 1300±400 cps at 180°C / 2400±500 cps at 160°C (HG/T-3660), and a hardness of 70±5A (GB/T 531), 8078 flows smoothly through nozzles and achieves rapid bond development. The moderate softening point means lower application temperatures than many competitors, reducing energy costs and the risk of substrate heat damage on sensitive printed and laminated surfaces.

Key Applications: Beyond Plain Corrugated

Most standard carton sealing hot melts perform adequately on untreated kraft corrugated board. The real challenge begins when the substrate changes. Modern packaging increasingly uses coated, printed, and laminated board stock that resists adhesive penetration. TONGDE 8078 is specifically formulated to address this challenge.

This hot melt glue for laminated carton bonds effectively to:

• Standard corrugated board — kraft liner, test liner, and recycled fiber board
• Coated and clay-coated board — commonly used in consumer electronics and food packaging
• Laminated cartons — BOPP, PET, and matte film laminated surfaces
• UV-varnished and gloss-coated boxes — premium retail and display packaging
• Printed and colored cartons — flexographic and offset-printed surfaces

The formulation's enhanced wetting and polarity characteristics allow it to form strong adhesive bonds even on the low-energy surfaces presented by plastic film laminates and varnish coatings—substrates that defeat conventional carton sealing hot melts.

Why Choose TONGDE 8078?

Versatile Substrate Coverage: One adhesive for both plain corrugated and coated/laminated cartons eliminates the need to switch formulas between production runs, simplifying inventory and reducing changeover time.

Lower Operating Temperature: The recommended tank temperature of 150–170°C is lower than many high-performance alternatives, saving energy and protecting heat-sensitive substrates.

Clean Running: 8078 resists charring and degradation during prolonged heating, reducing tank cleaning frequency and maintenance downtime on multi-shift operations.

Regulatory Compliance: The product meets GB 9685 food contact material standards and REACH requirements, making it suitable for food packaging and export-oriented manufacturers.

Recommended Application Methods

TONGDE 8078 is compatible with spot spraying, strip spraying, roller coating, and slot-die application—covering all conventional carton sealing methods. For standard corrugated boxes, strip spraying along the flap seams is most common. For coated and laminated cartons, slightly higher application pressure and longer compression time (1–2 seconds) improve wetting on smooth, non-porous surfaces.

Packaging & Storage

8078 is supplied in 25 kg bags as standard. Store below 40°C in a dry, cool place away from direct sunlight. Under proper conditions, the shelf life is 2 years from the date of manufacture. We recommend first-in-first-out inventory rotation to maintain optimal performance.

Explore More Packaging Adhesive Solutions

For applications requiring higher heat resistance, explore our High Temperature Carton Sealing Adhesive product range. For filter assembly operations, our Hot Melt Adhesive for Air Filter Sealing offers specialized performance. For air filter folding, visit our Air Filter Folding Adhesive category.

Learn more about hot melt adhesive selection for challenging substrates from the Adhesives.org technical library and the Institute of Packaging Professionals.