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3 comments

  • Super glue has a very short shelf life which not many people realize. If the shelf life isn’t followed the glue decomposes into carbon monoxide and other toxins, and will take minutes or hours to initially dry instead of seconds. It should be stored below freezing at all times. Allow it to reach room temperature before opening, and dispose of it 30 days after opening.

    If you’ve gone past the shelf life to get the glue to still set fairly quickly get a little spritzer bottle or something and put a little bit of rubbing alcohol in it. After attaching the items with glue lightly spritz the glued area with the rubbing alcohol. On contact with alcohol super glue hardens so fast the reaction produces heat and shortens curing time as a well.

    Jeff
  • A good design of experiments solves all of the headaches. For most non-MIL-Q applications we identified at least 10 factors at three levels. 1. Surfaces, 2. Temperature, 3. Pressure, 4. Adhesive characteristics, 5. Pull of magnet to steel or another lie-in-kind magnet, 6, Timing between tests, 7. Cleaning agents, 8. Time of application of temperature and pressure. to effect bonding, 9. Humidity, 10. Future cleaning agents after bonding. Use an ANOVA to detect interactions and side effects. Note that C[10,3] = 120 combinations of factors and at three levels the number f observations required jumps to C[10,3]*3^3= 3240 total experimental tests. Have fun! Imagine what the needs would be if even 2 or 3 more factors were added such as acrid environment, Shock, the vibration was added to the testing as factors. Or, one chooses to combine this testing with C{10,4]=210 combinations! Not all is lost as there are simplifications and deeplearning ANN’s that come to the rescue.

    Charles G. Nutter
  • Once i have created enough surface area with abrasion to both surfaces, i have found that using 90% alcohol with a lint-free applicator then finishing off with a quick “stick-&-remove” with some clear gorilla [ or equivalent ] book tape provides an absolutely oil/dust free adherence. Especially for the removal of metal dust particles created from the abrasion of the magnet surface. Most have no clue as to how important surface preparation is when creating a bond & how much surface area can be created with some simple abrasion. Thank You for your correct & informative article !

    David Unger

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