Overview
The Folding Endurance Tester (Schopper Type) Is A Precision Laboratory Instrument Designed For Determining The Folding Endurance Of Paper, Specialty Papers, Foil, And Thin Films Up To 0.25 Mm Thickness.
The Instrument Operates In Accordance With:
Iso 5626 – Paper — Determination Of Folding Endurance
Tappi T 511 – Folding Endurance Of Paper (Mit/Schopper Type Methods)
Folding Endurance Is Defined As The Number Of Double Folds Required To Cause Rupture Of A Test Specimen Under Specified Conditions Of Tension And Folding Speed.
This Test Is Particularly Critical For Security Papers, Currency Papers, Document Papers, Map Papers, And Archival Materials, Where Resistance To Repeated Handling Is A Key Performance Parameter.
Principle Of Test (Schopper Method)
A Test Strip Of Defined Dimensions Is Clamped Between Two Opposed Jaws Under A Specified Tensile Load.
A Slotted Folding Blade Reciprocates Between Calibrated Creasing Rollers, Producing Alternate Folds At A Constant Rate Until The Specimen Ruptures.
The Total Number Of Double Folds Sustained Before Failure Is Recorded As The Folding Endurance Value.
Technical Specifications
Test Method: Schopper Principle
Applicable Standards: Iso 5626 / Tappi T 511
Applicable Materials: Paper, Security Paper, Foil, Thin Films
Maximum Sample Thickness: Up To 0.25 Mm
Test Specimen Size: 15 Mm × 100 Mm
Folding Speed: 120 Double Folds Per Minute
Applied Tension Load: 1000 Grams (Spring-Controlled Loading System)
Clamping Mechanism: Horizontally Opposed Movable Clamps
Folding Mechanism: Slotted Folding Blade With Four Hardened Creasing Rollers
Counter Type: Five-Digit Digital Counter
Counter Functions: Hold & Zero Reset Facility
Power Supply: 220v Ac, 50 Hz
Construction: Heavy-Duty Rigid Frame With Precision Components
Finish: Powder-Coated Corrosion-Resistant Body
Performance Characteristics
High Repeatability And Reproducibility
Stable Folding Speed Control
Uniform Load Application
Low Mechanical Vibration
Designed For Continuous Laboratory Operation
Measurement Output
The Instrument Displays:
Total Number Of Double Folds At Break
Endurance Value As Per Iso/Tappi Reporting Format
Results May Be Expressed As:
Arithmetic Mean Of Replicate Tests
Logarithmic Folding Endurance (If Required By Standard Reporting Practice)
Applicable Standards: SCAN P 17:77, TAPPI T 423/453, TAPPI T453/511
Applications
The Folding Endurance Tester Is Widely Used In:
Paper Mills
Security Paper Manufacturing Units
Government Printing Presses
Currency Paper Production
Packaging Material Testing Laboratories
Research & Development Centers
Quality Assurance Departments
Precision Die & Punch Type Sample Strip Cutter
Specimen Size: 15 Mm × 100 Mm
Ensures Dimensional Accuracy As Per Iso Requirements
