ADHESION TEST P R E S E N T E D B Y: • RASMITHA R • SHRIHARI A • S I VA R A N J I N I T PEEL ADHESION TEST: • Peel adhesion test is a method to measure the strength of an adhesive bond between two materials. • This test is also known as “peel test” or “peel strength test” and it is used to determine the force required to separate two bonded surfaces. • The test measures the maximum force required to separate a material from a substrate at a specific angle and rate. • It is performed in Universal Testing machine. UNIVERSAL TESTING MACHINE METHODS OF PEEL ADHESION TEST: • 180-degree Peel Test: This method measures the force required to separate two materials that are bonded together, by peeling them apart at a 180-degree angle. It is the most commonly used method and is suitable for most adhesives. • 90-degree Peel Test: This method measures the force required to separate two materials that are bonded together by pulling them apart at a 90-degree angle. This method is suitable for materials that have a low peel strength or are brittle. • T-Peel Test: This method measures the force required to separate two materials that are bonded together, by pulling them apart at a 180degree angle in a T-shape. This method is suitable for materials that have a low peel strength or are brittle. • Rolling Peel Test: This method measures the force required to separate two materials that are bonded together by rolling them apart. This method is suitable for materials that have a low peel strength or are brittle. PUPOSE: • • • • To evaluate the bond strength of adhesives materials To determine the suitability of an adhesive for a specific application To compare the performance of different adhesives To monitor the quality control of adhesive bonds in the manufacturing process STANDARDS • The ASTM International (formerly known as the American Society for Testing and Materials) has various standards for adhesion testing based on the materials being bonded. • ASTM D3359 is a common standard. • It provides guidance on methods for assessing the adhesion of coating films to metallic substrates. • ASTM D4541, which covers the pull-off strength of coatings using portable adhesion testers. RANGE OF VALUES Paper and Cardboard: Plastic Films: • Tensile or peel strength: 1 to 5 N/cm • Bond strength for glued joints: 2 to 10 N/cm • Tensile or peel strength: 5 to 20 N/cm • Bond strength for heat-sealed joints: 10 to 30 N/cm Metalized Films: • Adhesion strength: 15 to 40 N/cm • Peel strength: 5 to 15 N/cm Aluminium Foil: • Tensile or peel strength: 20 to 60 N/cm • Bond strength for adhesive joints: 15 to 40 N/cm Flexible Packaging Laminates: • Peel strength: 10 to 40 N/cm • Tensile strength: 15 to 50 N/cm APPLICATIONS Quality Assurance Material Selection Seal Integrity Printed Packaging Tamper Evidence Barrier Properties Transportation and Handling Compliance with Standards THANKYOU!