Peel Strength
Definition
Force required to peel tape from the adherend at a specified angle.
Historical Background
1950s: 90-degree peel test became industry standard.
Example
Easy detachment = low peel strength; tearing paper fibers = high. Like a tug-of-war.
Formula
Peel Strength = Maximum Peel Force (N) / Tape Width (mm)
Core Concepts
Ideally cohesive failure (within adhesive) rather than adhesive failure (separation from substrate).
Extended Applications
Packaging: 3-8 N/25mm; automotive paint protection: 15-25; industrial: 50-100; medical: 1-3.