What is the Shear Resistance - What is shear resistance??

Also known as shear adhesion shear strength shear cohesion or cohesive strength this term refers to the ability of an adhesive to resist shear stress Shear stress is a type of stress whereby the external force acting on an object or surface is acting in a direction that is parallel to the surface For example the shear resistance of an adhesive is tested by bonding two surfaces together using that adhesive and then forcing one of the surfaces to slide across the other e g by applying a label onto a substrate and then trying to slide the label across the surface of that substrate While an adhesive bond is reliant on both the adhesive external bond and cohesive internal bond strength of an adhesive shear resistance is usually associated more closely with the internal strength of an adhesive Adhesives with low shear resistance are usually softer have a higher tendency to flow and lower cohesion which means they are more likely to split under stress compared to adhesives with high shear resistance which are firmer have less tendency to flow and have better cohesion

Glossary

Holding Power - What is holding power?

Definition of HOLDING POWER:

This term refers to the ability of a pressure sensitive label to withstand shear stress; shear stress is a type of stress where the external force that acts on an object or surface is parallel to the surface. In labelling, for example, shear stress occurs when a pressure sensitive label is made to slide across the surface onto which it has been applied. Holding power, therefore, is reliant on both the adhesive strength and cohesive strength of the materials used to create a pressure sensitive label (both the face material and adhesive must maintain a strong bond with the adjacent surface(s) and have the internal strength to resist splitting under stress).

A sheer stress test performed with a jig fixture and c clamps; the ability of a label to withstand sheer stress is called its holding power.

Here is the Harvard-style citation to use if you would like to reference this definition of the term holding power:
Label Planet (2020) What is holding power? | Holding Power Definition. Available at: https://www.labelplanet.co.uk/glossary/holding-power/ (Accessed: January 1, 2024).

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