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Structural adhesive

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bmwebb(at)cox.net
Guest

Posted: Thu Feb 09, 2006 4:16 am Post subject: Structural adhesive

Also, what is "structural adhesive"? And where can I get this?



Thanks again



Bradley



KF2 N1836



Middle GA

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bnn(at)nethere.com
Guest

Posted: Thu Feb 09, 2006 9:58 am Post subject: Structural adhesive

At 04:12 AM 2/9/2006, you wrote:

 	  Quote: 	
		  Also, what is "structural adhesive"? And where can I get this?


	


Structural adhesive is simply high strength glue. It comes in a variety of 

formulations, but generally has a shear strength of 2000 psi or greater, 

and a peel strength of 20 pli or greater. They are called structural 

because they are used as primary structure. There are a wide variety of 

formulations, the most common being epoxy based, but there are also 

acrylic, methacrylate, cyanoacrylate, and many others. They are made by a 

variety of manufacturers, including Hysol and 3M for epoxy, and Plexus for 

methacrylate. The various formulations are a result of the diversity of 

cost/performance/application requirements.



For Kitfox assembly Aircraft Spruce is probably your most convenient 

supplier; they sell the Hysol 9430 epoxy adhesive, which has very good 

properties. You can probably get them locally, but it would be a specialty 

supplier.



Do not confuse adhesive with resin. The latter can be used as a glue, but 

has much poorer peel characteristics. Also avoid using the epoxies you get 

in the little tubes at Home Depot. Close inspection will reveal tensile 

strengths less than 2000 psi versus more than 5000 psi for the Hysol 

product. (They do sell an acrylic adhesive with 4000 psi tensile, but it's 

working time is about 15 seconds, too short for anything but very small tasks.)

Guy

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