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Hot melt adhesive carton sealing uses a hot melt glue machine to melt the adhesive into liquid form, then delivers it through hoses and spray guns to the surface of cardboard boxes. The adhesive bonds upon cooling. This method meets all carton sealing requirements and overcomes the disadvantages of tape sealing methods. Common hot melt adhesive carton sealing equipment includes: hot melt glue case erectors, hot melt glue case sealers, hot melt glue case erecting and sealing machines.
Automatic Flap Hot Melt Glue Case Sealer
Hot melt glue carton sealing advantages summary:
Hot melt glue packaging is aesthetically pleasing with excellent packaging quality
Hot melt glue has excellent bonding strength and strong penetration, enhancing the overall strength of sealed cartons, making them less prone to deformation and cracking. Hot melt glue application systems can apply adhesive to various key positions of different shapes, such as inner flaps of cartons. Additionally, tape has poor low-temperature resistance; in cold northern climates, tape can easily peel off, while hot melt glue performs well at low temperatures, capable of withstanding -40°C. Hot melt glue has a storage life of up to 2 years without special storage requirements, while tape is not suitable for long-term storage as it affects adhesion. Hot melt glue provides excellent anti-theft functionality because the adhesive penetrates into the corrugated board, and any attempt to open the box will destroy the carton.
Hot melt glue packaging offers high speed, high efficiency, and low cost
Using hot melt glue for carton sealing is fast, with the entire bonding process taking only 1-3 seconds, suitable for mass production with low energy consumption and cost. Each hot melt glue machine has capacity limits, but the machine can be refilled during operation by simply opening the glue tank to add more adhesive while continuing to work.
When using hot melt glue packaging, temperature usage precautions are needed.
Hot melt glue machine operating temperature set too high
Usually people think that when using hot melt glue, the higher the temperature, the faster the melting and the faster the gluing speed. Actually, this is a misconception. When melting hot melt glue, the melting speed versus temperature roughly follows a decaying oscillation function curve, with peaks and valleys. Therefore, when setting machine operating temperatures, it's best to refer to the hot melt glue manufacturer's recommendations and set the operating temperature based on actual production conditions. If smoke appears during hot melt glue use, first try lowering the machine's set temperature, and if it continues smoking, contact the relevant supplier to confirm if the temperature is appropriate.
Hot melt glue temperature control out of control
Currently, there are mainly two types of melting equipment on the market: one is melting tanks, and the other is extruders. For melting tanks, some are heated via heating plates, and when the hot melt glue level drops below the heating plate, the heating plate is exposed to air and continues heating, causing the melting tank to smoke. In severe cases, this can even result in gel carbonization. For this situation, it's necessary to keep the hot melt glue liquid level above the heating plate. Other melting tanks are heated via heating tubes, similar to extruder melting, both using temperature sensors to reflect real-time temperature. Therefore, when temperature sensors fail, extruders and heating tube melting tanks will continue heating the hot melt glue, causing it to smoke. For this situation, machine components need to be replaced promptly.
Poor thermal stability of hot melt glue
Poor thermal stability and low-quality hot melt glue can cause abnormal problems during use. In this case, the hot melt glue should be replaced promptly.
Speed professional automated downstream packaging equipment service provider: offering hot melt glue case erectors, hot melt glue case sealers, hot melt glue case erecting and sealing machines.
