NONSTATIONARY PEELING APPARATUS

A piece of apparatus for measuring the peel adhesion behavior of press ure-sensitive adhesive tapes was developed. The apparatus allows peel rates to be varied as any functions of time or peel distance. In a cyc le run of the accelerating and decelerating peel processes, nonstation ary peeling was investigated over a wide range of peel rates using rel atively short-length samples. The resultant behavior in nonstationary peeling indicated that in the interfacial failure regime, a good agree ment with the normal stationary peeling can be obtained. This nonstati onary peeling apparatus is expected to be useful for evaluation of pee l adhesion. (C) 1994 John Wiley & Sons, Inc.