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Light-Activated Adhesives  
User currently offline2H4 From United States of America, joined Oct 2004, 8956 posts, RR: 60
Posted (8 years 3 months 4 weeks 1 day 6 hours ago) and read 1700 times:
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So I just got back from the dentist, where he secured a loose filling. He used two syringes...with applicator tips...no needles, thank god...and applied two different substances. He then used a strange type of flashlight to "activate" the stuff. Later, he explained that the flashlight emits a very bright "white light" to activate the sealant.

This is the first I've ever heard of light-activated sealants/adhesives. Is this technology used in the aviation industry at all? I'd love to hear more about it.




2H4





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7 replies: All unread, jump to last
 
User currently offlineFLY2HMO From , joined Dec 1969, posts, RR:
Reply 1, posted (8 years 3 months 4 weeks 1 day 5 hours ago) and read 1690 times:

Quoting 2H4 (Thread starter):
Is this technology used in the aviation industry at all?

Never heard of it being used. (And I've learned of pretty wacky stuff now that I'm at ERAU) Although if it was, I bet it would obviously be used for gluing composites.

Honestly though, I don't see what would be the use of light activated glues in aviation. Good 'ole two-part mixin' epoxy seems to do the job just fine Big grin


User currently offline2H4 From United States of America, joined Oct 2004, 8956 posts, RR: 60
Reply 3, posted (8 years 3 months 4 weeks 1 day 4 hours ago) and read 1674 times:
AIRLINERS.NET CREW
DATABASE EDITOR



Interesting....thanks for the links, Richard!  Smile




2H4





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User currently offlineHAWK21M From India, joined Jan 2001, 31702 posts, RR: 56
Reply 4, posted (8 years 3 months 4 weeks 13 hours ago) and read 1613 times:

Quoting 2H4 (Thread starter):
He then used a strange type of flashlight to "activate" the stuff. Later, he explained that the flashlight emits a very bright "white light" to activate the sealant

http://www.pprc.org/pubs/techreviews/radiant/rcdefin.html
Thats UV light for curing the Adhesive.

regds
MEL



Think of the brighter side!
User currently offlineVzlet From United States of America, joined Mar 2004, 839 posts, RR: 0
Reply 5, posted (8 years 3 months 4 weeks 12 hours ago) and read 1603 times:

Even back at least as far as the 1970s, some brands (Carl Goldberg, for example) of trim striping tape for (flying) model planes relied on the UV present in sunlight to achieve a final adhesive cure.
-Mark



"That's so stupid! If they're so secret, why are they out where everyone can see them?" - my kid
User currently offline2H4 From United States of America, joined Oct 2004, 8956 posts, RR: 60
Reply 6, posted (8 years 3 months 4 weeks 10 hours ago) and read 1590 times:
AIRLINERS.NET CREW
DATABASE EDITOR




Quoting HAWK21M (Reply 4):
Thats UV light for curing the Adhesive.

Thanks, Mel. Your link lists "Aircraft and aerospace structural assemblies" as applications utilizing this technology. Do you have any idea where the stuff is used, specfically, and on what materials? Is it only used on composites, or metals as well? What are the advantages and disadvantages of the stuff?

Thanks very much,



2H4





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User currently offlineHAWK21M From India, joined Jan 2001, 31702 posts, RR: 56
Reply 7, posted (8 years 3 months 4 weeks 7 hours ago) and read 1571 times:

Quoting 2H4 (Reply 6):
Do you have any idea where the stuff is used, specfically

Not much details on this though from Aerospace use,apart from Maybe Composite repair.
regds
MEL



Think of the brighter side!
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