Paper ring compression strength tester
This article details paper ring crush testers, vital tools for evaluating the compressive strength of paperboard, corrugated cardboard, and packaging materials. These instruments measure resistance to vertical crushing forces, ensuring materials meet structural integrity standards.
Applicable Standards
The tester complies with global benchmarks:
ISO: ISO 12192 (Corrugated Board), ISO 3037 (Paperboard)
TAPPI: T 808 om-19 (Ring Crush), T 826 om-18 (Edge Crush)
GB/T: GB/T 2679.8 (Corrugated Board), GB/T 6546 (Paperboard)
Main Parameters
| Parameter | Specification |
|---|---|
| Force Range | 50-5000N (Adjustable) |
| Accuracy | ±1% (Full Scale) |
| Ring Size | 152mm (Inner Diameter, ISO) |
| Compression Speed | 12.7mm/min (Standard) |
| Data Output | Peak Force, Crush Resistance (kPa) |
Working Principle
The tester applies vertical compression to a ring-shaped sample until failure. A load cell measures peak force, and software calculates crush resistance using:
Crush Resistance = Peak Force / Sample Width
Test Principle
Sample Preparation: Cut a 152mm (ID) ring from the material.
Compression Test: Apply force at 12.7mm/min until the ring collapses.
Result Calculation: Divide peak force (N) by ring width (mm) to get crush resistance (N/mm).
Applications
Used in packaging labs and mills, the tester ensures boxes withstand stacking loads during transit. Compliance with ISO/TAPPI standards guarantees reliable data for material development and quality control.
This guide provides technical insights to support informed decisions when selecting or operating ring crush testers, ensuring accurate material evaluation.