Preventing solid edge delamination
What can be done to keep solid edging from coming off particleboard? June 6, 2001
13 mm solid edging, which had been pre-primed and looked good off of the machine, is now coming off the particleboard, leaving the adhesive attached to the particleboard, but no transference to the edge. What should I do to ensure this doesn't occur again, and can anyone suggest a repair method now that the shelving is on site?
You probably have a real problem. Edge delamination (I am assuming it is a lumber band applied with an edgebander with EVA glue) on a bander can usually be cause by the heat being sucked out of the glue by the core and the longer time and more pressure it takes to glue a big stick. Try increasing your glue temperature slightly, put a heater on to heat up the core edge before it gets to the banding unit, think about cutting a tongue and groove on the parts! About the parts on the job, good luck. We have all had that happen--no easy fix.
Solid wood edges are a real challenge. Your problem can be solved in different ways.
Check the following:
- The moisture content of you lumber bands should be 6-8%.
- Use a rough sandpaper to increase the roughness of the lumber bands, then the hot melt will have better adhesion.
- Use max heat in the glue, even preheat the lumber with IR or hot air blower. Run machine at max speed. The glue will still be hot when the two substrates get in contact.
- Check the primer. Most people use PVAc glue. The PVAc adhesive is not compatible with the EVA hot melt.
- Simply switch to a Polyolefine hot melt (APAO). In general, they are much more aggressive in their tack. You do not need primer.
Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?
Have you reviewed the related Knowledge Base areas below?
KnowledgeBase: Adhesives, Gluing and Laminating
KnowledgeBase: Adhesives, Gluing and Laminating: Glues and Bonding Agents
KnowledgeBase: Adhesives, Gluing and Laminating: Gluing and Clamping Equipment
KnowledgeBase: Knowledge Base
All rights reserved. No part of this publication may be reproduced in
any manner without permission of the Editor.
Review WOODWEB's Copyright Policy.
The editors, writers, and staff at WOODWEB try to promote safe practices.
What is safe for one woodworker under certain conditions may not be safe
for others in different circumstances. Readers should undertake the use
of materials and methods discussed at WOODWEB after considerate evaluation,
and at their own risk.
335 Bedell Road
Montrose, PA 18801
Copyright © 1996-2018 - WOODWEB ® Inc.