Specifying magnetic hardware for Tier-1 apparel brands requires verified, reproducible mechanical metrics. Unlike mechanical snap buttons measured by spring tension, magnetic fasteners require distinct evaluations for vertical peel-off force ($F$) and parallel shear force ($\tau$). Here is how magtech® calibrates quality control benchmarks.

1. Vertical Peel-Off Force (F) Methodology

Peel-off force determines resistance against perpendicular pull. Using an Instron or Shimadzu universal tensile tester equipped with custom non-ferrous aluminum pneumatic grips:

• Crosshead separation rate: $100\text{ mm/min}$.
• Interlayer substrate: Standard 0.3 mm woven nylon taffeta sandwich to simulate placket fabric.
• Pass/Fail Threshold: Consistent peak vertical pull rating (e.g., $8.4\text{ N} \pm 5\%$ on our CXK-1629 series).

2. Parallel Shear Force (\tau) Methodology

Parallel shear measures the force required to slide mated magnets sideways until separation occurs. High shear force is critical to prevent jacket flaps from slipping out of alignment during vigorous arm movement.

3. Environmental Pre-Conditioning

Testing is conducted both at baseline ambient conditions ($23^\circ\text{C}, 50\%\text{ RH}$) and post-environmental conditioning (after 24 hours at $-25^\circ\text{C}$ and 10 cycles of AATCC 135 laundering).

Review comprehensive mechanical load cell testing reports and test certificates at magtech.global.