Cleaning Glue Spreaders
How to maintain glue spreaders for peak performance. May 9, 2001
Glue mixers and speaders should be thoroughly cleaned at the end of each working day. When mixing and spreading equipment is used for various types of glue, a neutralizing process should be used. This should be followed by a water rinse in all cases.
Three types of neutralizing solutions are commonly used:
One half pound of washing soda or trisodium phosphate dissolved in two gallons of water.
One cup of vinegar in two gallons of water.
One half cup of household ammonia (approx. strength=5%) in one gallon of cool water.
In all cases, wash spreaders thoroughly with warm water. Tighten doctor roll against rubber roll and fill with neutralizing solution. With glue spreader running, clean grooves with stiff brush. Open doctor rolls and flush with clear water. Remove dams and thoroughly clean. Specific neutralizing solutions: The solutions suggested for the following glue mix changes are:
- Urea resin to casein-Ammonia solution
- Casein to urea resin-Acid solution
- Casein to polyvinyl acetate-Acid solution
- Polyvinyl acetate to casein-Alkaline solution
- Polyvinyl acetate to urea resin (and vice versa)-Alkaline solution
- Phenolic resin to urea resin-Acid solution
- Urea resin to phenolic resin-Alkaline solution
- Polyvinyl acetate to phenolic resin-Alkaline solution
- Phenolic resin to polyvinyl acetate-Acid solution
The alkaline and acid materials mentioned above may be irritating to skin, eyes, nose and throat. Avoid prolonged or repeated skin contact. Use with adequate ventilation. In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Get medical attention.
This article was provided by Kent Pitcher of Custom-Pak Adhesives, Inc.
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: 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 © 1996-2017 - WOODWEB ® Inc.