ADHESIVES 01 90 Degree peel fixture on a 68TM 02 2820-036 Variable angle peel fixture with screw-action grip (upper) 02
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03 180 degree peel test 2712-05x Pneumatic side action grips
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Grips and Fixtures
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The strength properties of adhesives are important, and a variety of techniques are employed to test them. From seals that are intended to fail predictably and repeatably such as in packaging, to ultra-high-strength bonded structures in automotive and aerospace applications, Instron® has a range of grips and fixtures to assess the strength and peel resistance of adhesives.
Application Overviews
Tensile tests on lap-shear specimens are commonly performed using 2710 Series screw action grips as the dual-acting design allows for an adjustable offset. Adhesive properties are often determined using a variety of peel fixtures such as 90°, variable angle and rotating wheel. These are ideal for testing adhesive tapes of various types. The adhesion of printed circuit board foils can be determined using the 2820-101/-102 floating roller fixture, which is ideal for peeling flexible laminates from a rigid substrate. Special fixtures for testing adhesives in wood, composites and microelectronics applications are also available. Wood test fixtures include devices for measuring the shear strength of adhesives used for timber. The climbing drum peel fixture for composites is available for both flexible and rigid substrates. Miniature peel fixtures are designed for very small specimens and low forces. Fatigue tests on adhesive joints can usually be performed using grips from our standard range of general purpose fatigue grips.
Environmental Adhesives are often tested under various environmental conditions. The Instron range of environmental chambers covers a wide range of conditions including high and low temperatures.
Software Peel tests require analysis of the complex force displacement curve. Bluehill Universal or Bluehill Elements software programs contain a large number of control and analysis options relating specifically to peel tests. Fatigue tests can be performed using dynamic software programs, such as WaveMatrix™. 339
