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Don’t just use tape for carton sealing! What is hot melt adhesive sealing? Learn everything in this article
Classification： News
2026-09-28
Many friends working in e-commerce, warehousing and packaging factories often struggle with carton sealing: should they use ordinary packing tape or hot melt adhesive for carton sealing? Today we’ll briefly introduce hot melt adhesive carton sealing, so you can figure out its applicable scenarios after reading.
What is hot melt adhesive carton sealing?
Hot melt adhesive is a type of thermoplastic adhesive. It exists as solid pellets at room temperature. When heated and melted by a hot melt glue machine, it turns into a flowing liquid adhesive. The glue is sprayed onto the joints of cartons. Upon contact with the carton surface, the liquid glue cools and solidifies rapidly, bonding the top and bottom flaps of the carton together. This process is known as hot melt adhesive carton sealing.
The bonding process requires no solvents and features fast cooling, making it suitable for automated carton sealing production lines.
Advantages of hot melt adhesive carton sealing
- Strong bonding strength, resistant to unintended opening The glue penetrates into the fiber of corrugated cardboard instead of merely sticking to the surface. When cartons are stacked or transported over long distances amid vibration, the edges are less likely to lift or split open, lowering the risk of goods damage and loss. It maintains better bonding stability than ordinary tape in humid environments.
- Compatible with automated production lines to improve packing efficiency Used with automatic carton sealers for continuous operation, hot melt adhesive is ideal for high-volume carton packing. For factories and e-commerce warehouses with large order volumes, it reduces manual tape application work and boosts overall packing speed.
- Better recyclability of cartons Cured hot melt adhesive contains no solvent residues. During waste paper recycling processing, hot melt adhesive is easier to peel off and has less impact on paper recycling, meeting packaging recycling requirements.
- Compatible with various carton materials With the right grade of hot melt adhesive, stable bonding can be achieved for regular corrugated cartons, color printed cartons and film-laminated cartons.
Suitable scenarios for hot melt adhesive carton sealing
- High-volume e-commerce shipping cartons, food packaging boxes and daily commodity outer packages
- Cartons of goods requiring long-term stacked storage in warehouses
- Automated packaging production lines where factories pursue high packing efficiency
The sealing performance of hot melt adhesive is affected by ambient temperature, carton material and adhesive grade selection. Low-temperature-resistant hot melt adhesive should be used in cold environments. For cartons with smooth film-laminated surfaces, matching adhesive types are required to guarantee sealing results. Improper adhesive selection may lead to insufficient adhesion.
Hot melt adhesive carton sealing is a mature sealing solution for automated packaging. It delivers reliable bonding and is designed for mass packing. Still, you need to select suitable hot melt adhesive according to your carton material and operating environment. If you are building a packaging production line or planning to replace your current sealing solution, you can carry out multiple sample tests for comparison and pick the hot melt adhesive that fits your products.
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