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Engineering of duck tape and other adhesives

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soldar:
Video by Bill Hammack the engineerguy. I wish he'd post more often. His videos are very interesting.

I like the thought that the engineering purpose and method is to solve problems before we have full scientific knowledge and understanding of the underlying principles, using experiments, rules of thumb etc.

And yes, it is "duck tape" because it was initially made with duck cloth https://en.wikipedia.org/wiki/Cotton_duck 
And it carries a warning that it should not be used in ducts.



BrianHG:
https://www.eevblog.com/forum/chat/fun-for-nerds/msg5510314/#msg5510314 :-DD

soldar:

--- Quote from: BrianHG on May 25, 2024, 11:16:17 am --- https://www.eevblog.com/forum/chat/fun-for-nerds/msg5510314/#msg5510314 :-DD
--- End quote ---

Oops! Sorry. I will try to be more careful in the future.

But still, besides the subject matter of this particular video, I like the thought that engineers try to solve problems with whatever they have at hand and do not really care so much about the deep nature of things while scientists try to get to understand the nature of things.

Of course there is overlap between the two but I had never really stopped to think about it that way.

Stray Electron:

--- Quote from: soldar on May 25, 2024, 11:36:15 am ---
--- Quote from: BrianHG on May 25, 2024, 11:16:17 am --- https://www.eevblog.com/forum/chat/fun-for-nerds/msg5510314/#msg5510314 :-DD
--- End quote ---

Oops! Sorry. I will try to be more careful in the future.

But still, besides the subject matter of this particular video, I like the thought that engineers try to solve problems with whatever they have at hand and do not really care so much about the deep nature of things while scientists try to get to understand the nature of things.

Of course there is overlap between the two but I had never really stopped to think about it that way.

--- End quote ---


    I was raised as an electronics technician and worked for many years as one but I later became an engineer.  Technicians and engineers also have different approach to problems.

    To me one of the more interesting products that demonstrate the differences between technicians and engineering and scientists are the better LeCroy scopes with their advanced math and Fourier analysis software packages.  You can clearly see that they were developed for scientists and not technicians ("engineers" fall into both ends of that scale.)

     What also interesting, if you ever get to see one, are the OLD oscilloscopes that were made for the early electronics technicians and that where all of the sweeps are based on Cycles per Second, Kilocycles per Second, etc  (yes pre-Hertz)  instead of on time.

jpanhalt:
Interesting.  He describes an important difference between pressure-sensitive adhesives (PSA) and most others. They need to stick well to a backing (when there is one) and surface to which they are applied, but release cleanly from that surface.  Some people have referred to them as the cadillac of adhesives.  Of course, not all of those properties are exhibited by all PSAs.

For more details of the chemistry, consider this book Edited by Irving Skeist: https://www.amazon.com/Handbook-Adhesives-Irving-Skeist/dp/1461280192  That price has increased considerably since I bought my copy in 1993.  Chapter 38, beginning p. 641 is specifically on PSA.  Some sources may allow access to those pages.

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