INVESTIGATION OF ETCHING AND CEMENTING OF TEFLON.
MCDONNELL AIRCRAFT CORP ST LOUIS MO
Pagination or Media Count:
Lap shear and peel tests were conducted in order to compare Shell 828 - Versamid 125 adhesive with Bondmaster M-344 cement. Similar specimens were tested to compare the bondability of an etched Teflon surface, produced by Tetra-Etch solution, with that of the etched Teflon surface supplied by the Teflon vendors. The specimens were made in the following combinations vendor etch Teflon Tetra-Etch Teflon, and bare Teflon, cemented to clad aluminium and to themselves. One group of these specimens was cemented with each of the two adhesives. The Tetra-Etch treatment produced a bondable surface comparable to the vendor etch treatment. Specimens of etched Teflon bonded to clad aluminum with Bondmaster M-344 cement had peel strengths of 10.1 pounds per in. compared to only 2.5 pounds per in. when bonded with Shell 828 - Versamid 125 adhesive. Specimens of etchedTeflon had average peel strengths of 9.2 lbs. per in. when bonded with Bondmaster M-344 compared with average peel strengths of 8.7 lbs. per in. when bonded with Shell 828 Versamid 125 adhesive. Neither adhesive produced a satisfactory bond to bare Teflon. Author