Hotmelt Adhesive - For Your Edgebanding Machine
Hotmelt adhesives are based on different raw materials and are processed when hot. Most common are adhesives based on ethylene vinyl acetate (EVA) that pertain to thermoplastics and can therefore be repeatedly melted. Adhesives based on polyurethane (PUR) on the other hand harden chemically and ensure a lasting bond. Both types are used on edgebanding machines for the bonding of plastic, paper and wood edgings. Depending on the type of machine, the use of granules or the relevant hotmelt adhesive cartridges is necessary. The small 2.5 kg bags and the possibility to purchase single cartridges make it easier to quickly switch to different colours.
If the bonding is particularly demanding, you should change to PUR hotmelt adhesives. This reactive adhesive does not only set physically by solidifying, it reacts chemically with the humidity of the surrounding air as well as the remaining humidity in the workpiece. This cross-linking creates a particularly high heat and water resistance. Moreover, the glue line will be more resistant against solvents and cleaners. PUR is especially suitable for overpainting.
Compare the range of the common adhesive technologies
Did you know? PUR adhesives can be processed on almost all systems without additional equipment. Our contact persons will be happy to advise you!
| Filled EVA adhesive | Unfilled EVA Adhesive | PUR adhesives | PUR ME adhesives |
| | | | - No hazard labelling
- High standards of occupational safety
|
| | - Thin bondline
- Low consumption
| - Unsurpassed water resistance
- Heat-resistant up to 150 ° C
- Highest bond strength
- invisible bondline
- Low consumption
| - Unsurpassed water resistance
- Heat-resistant up to 150 ° C
- Highest bond strength
- invisible bondline
- Low consumption
|
- Clean processing
- Thermally stable
- High initial tack
| - Clean processing
- Thermally stable
- High initial tack
| - Clean processing
- Thermally stable
- High initial tack
| - Clean processing
- Thermally stable
- High initial tack
|
Filled hotmelt adhesives
You can still call filled EVA adhesive a classic. It has lots of positive characteristics, such as the easy and uncomplicated handling, the simple cleaning of the machine and a nice bondline. Due to mineral components, stringing is reduced and the adhesive can be easily applied with a standard roller. The "classic" will forgive small mistakes.
Unfilled hotmelt adhesives
The further development of the filled adhesive resulted in the unfilled variant. In the latter, the mineral fillers were deliberately left out to create a thin bondline with the remaining pure resins. The glue consumption can be reduced at the machine. We recommend the transparent test edging to help find the correct amount of adhesive and correct the application.
The best adhesive will be no good…
...if the pre- and post-processing of the board isn't up to scratch. Therefore, you should always make sure that all blades and cutters are sharp. Slight damages in the board surface of a poorly cut board are enough to create weak spots that allow humidity to seep in. The spacer, the pinch roller and the scraper aren't adjusted well either? For which units do you need the right cleaning agent? Our technical sales consultants are happy to help.
OstermannTV: Alternating between EVA and PUR Granules
Have you thought about changing to PUR for a while? Then take a look at our video tutorial. We show you the necessary steps to change from EVA to PUR hotmelt adhesive and back.
