Short:  Does anyone successfully use hot-melt  adhesives to retain larger
components in place mechanically, with no bond failures over lifetimes of
many years? If so, please comment.

Longer:

At various times we have had discussions on the PICList re the use of
adhesives to help locate / retain ... heavy components on PCBs.

Here and in other forums I have resolutely insisted (eg   *here
<https://electronics.stackexchange.com/a/18533/3288>* &  *here
<https://electronics.stackexchange.com/a/38766/3288>)* that using hot-melt
adhesive is an invitation to disaster as it does not retain its bond long
term. While this has been my observation in all cases where I have
encountered its use by others, this is clearly 'selling it short" by using
the term HM for a vast range of products, some of which SHOULD be eminently
suitable for the task.

A quickish web search turned up dozens of(apparently) good quality
references to HM and a large range of technical literature.

It seems 'obvious' that SOME hot melt adhesives would do a good job of the
'simple' task of retaining a largish component in place indefinitely, and
not losing bond strength weeks months or even years thereafter.

So - again:  Does anyone successfully use hotmelt  adhesives to retain
larger components in place mechanically, with no bond failures over
lifetimes of many years? If so, please comment.
Brand, type, application results, ... .



         Russell

_________________________________________

https://www.bond-tech-industries.com/about-us/blog/6-reasons-hot-melt-adhes=
ive-isnt-working/

https://multimedia.3m.com/mws/media/39803O/used-to-rigidize-large-component=
s-on-cicuit-board-of-dryer.pdf?fbclid=3DIwAR0KtAAUx9VCbIDyQ7moNGGKMnFmmiAJv=
IIfD5FEBSjxkoQYIHqJf5jAskg


https://multimedia.3m.com/mws/media/1245163O/3m-hot-melt-adhesive-3764-3748=
-technical-data-sheet.pdf

https://www.tandfonline.com/doi/abs/10.1080/00218469708010513https://wiki2.=
org/en/Hot-melt_adhesive

https://www.intemag.com/images/uploads/Loctite_Hot_Melt_Technology.pdf

https://intactadhesives.com/products/adhesives/

http://www.siegeladhesives.com/heatspek-technology


https://www.google.com/search?q=3D3M%E2%84%A2+Scotch-Weld%E2%84%A2+Hot+Melt=
+Adhesive+3748&oq=3D3M%E2%84%A2+Scotch-Weld%E2%84%A2+Hot+Melt+Adhesive+3748=
&aqs=3Dchrome..69i57j0l2.1453j0j8&sourceid=3Dchrome&ie=3DUTF-8

http://siegeladhesives.com/industrial-assembly/

*A nice 3M adhesive guide- HM & much more*


https://multimedia.3m.com/mws/media/372489O/adhesives-and-tapes-design-guid=
e.pdf


http://multimedia.3m.com/mws/media/44021O/3m-hot-melt-bonding-systems-guide=
..pdf

https://www.google.co.nz/search?num=3D40&q=3Dhot+melt+adhesive+bond+failure=
&tbm=3Disch&source=3Duniv&sa=3DX&ved=3D2ahUKEwj87eGrppXgAhUxKX0KHSFeDSoQsAR=
6BAgDEAE&biw=3D1602&bih=3D899

https://www.bostik-industrial.com/consider-automotive-hot-melt-adhesives-ca=
r-assembly/
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