Mounting Foams and Other Adhesives
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Frequently asked Questions
Accurate information is key to high-quality execution, which is why we are here to answer your questions.
Which type of glue can I use if I need a moisture-resistant glue joint?
We recommend using PUR hot melt adhesive for a moisture-resistant glue joint. In addition to moisture resistance, PUR adhesives also provide high temperature resistance of around 150° and a strong adhesive joint, which is fully achived only after a few days. PUR adhesive reacts with moisture, so the use of PUR adhesive requires regular and careful cleaning of glue pots of edge banding machines.
What type of cleaner can I use to clean glue pots on edge banding machines?
To clean EVA, PO, PP and non-reacted PUR hot melt adhesives in glue pots, you can use blue granulated cleaning agent Technomelt CLEANER 4. For intensive cleaning of heavily soiled glue pots, you can use Technomelt EASYFLOW or Technomelt ME.
What is the difference between EVA hot melt adhesives with and without fillers?
The filler is chalk, which affects the adhesive’s properties and, consequently, the edge processing. EVA hot melt adhesives with fillers, such as Technomelt KS 217, are more cost-effective, result in cleaner edge processing, and are suitable for slower feed speeds and less demanding bonding requirements. EVA hot melt adhesives without fillers, such as Technomelt KS 351, are more expensive, allow for thinner glue lines, lower adhesive consumption, higher temperature resistance, and stronger bond strength.
What does the term "open time" mean in relation to hot-melt adhesive?
The open time of a hot-melt adhesive is the time between applying hot-melt to the panel until the adhesive begins to set. During this time, the edge banding must be pressed o to the edge of the panel to achieve a high-quality strong bond. If the adhesive hardens too early before the edge banding is pressed on the panel, it means the open time was missed, which can lead to poor adhesion or delamination. The open time depends on the glue temperature on the application roller, the workshop and panel temperatures, and feed speed—these factors are crucial for a quality adhesive bond.
What does the D3 classification mean for woodworking PVAC adhesives?
Woodworking PVAC adhesives are classified according to EN 204 based on their moisture resistance, ranging from D1 to D4. D3-classified PVAC adhesives are suitable for indoor use in humid environments, such as kitchens and bathrooms. D4-classified PVAC adhesives are intended for exterior use in conditions with high moisture levels and water exposure, e.g., for garden furniture, windows, exterior doors, or outdoor wooden structures.
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