Drick DRK111A MIT Fold Endurance Tester

Overview

The Drick DRK111A MIT Fold Endurance Tester is a precision-engineered instrument designed for the quantitative assessment of fold endurance in thin sheet materials—primarily paper, paperboard, and other flexible planar substrates with thicknesses under 1 mm. It operates on the standardized MIT (Massachusetts Institute of Technology) folding principle, wherein a fixed-length specimen is clamped between two opposing folding heads and subjected to repeated 135° double-fold cycles under controlled tension until failure. This method quantifies material fatigue resistance by counting the number of folds required to produce a visible crack or complete rupture. The DRK111A implements this principle with high mechanical repeatability, servo-controlled actuation, and integrated optical position sensing to ensure precise cycle registration and automatic return-to-zero positioning after each test sequence. Its design complies with internationally recognized test methodologies essential for quality control in packaging R&D, pulp & paper manufacturing, and regulatory compliance laboratories.

Key Features

• Microprocessor-based control system with real-time sampling, measurement, and display of fold count, tensile load, and cycle parameters
• Touchscreen LCD interface with Chinese graphical menu navigation—intuitive for operator training and routine QC use
• Servo-motor-driven folding mechanism ensuring consistent angular displacement (135° ±2°) and timing accuracy (175 ±10 folds/min)
• Adjustable tension range (4.9 N to 14.7 N) via calibrated spring-loaded loading system, meeting ISO 5626 and GB/T 2679.5 requirements
• Interchangeable folding blades with four standard gap widths (0.25 mm, 0.50 mm, 0.75 mm, 1.00 mm), each conforming to specified edge geometry (fold width: 19 ±1 mm; corner radius: R0.38 mm ±0.02 mm)
• Automatic zero-return function post-test, minimizing manual intervention and enhancing throughput in high-volume testing environments
• Onboard data storage for multiple test records—including individual fold counts, logarithmic transformations, mean values, maximum/minimum values, and coefficient of variation (CV%)—accessible via display or printout
• High-speed thermal printer for immediate hard-copy documentation of results, supporting traceability in GLP-compliant workflows

Sample Compatibility & Compliance

The DRK111A is validated for use with paper grades (e.g., kraft, corrugating medium, linerboard), coated and uncoated paperboards, cellulose-based composites, and synthetic films within the specified thickness limit (<1 mm). Its mechanical configuration satisfies dimensional and dynamic constraints defined in ISO 5626:1993 “Paper — Determination of folding endurance”, GB/T 2679.5–2022 “Paper and board — Determination of folding endurance (MIT method)”, and QB/T 1049–2018 “Fold endurance testers for paper and board”. The instrument’s tension stability (±0.343 N deviation due to rotational eccentricity) and angular repeatability are verified per manufacturer calibration protocols aligned with national metrological standards for mechanical testing equipment.

Software & Data Management

While the DRK111A operates as a standalone embedded system without external PC dependency, its firmware supports full audit-trail functionality for critical test parameters: date/time stamping, operator ID input (via keypad), test mode selection, tension setting, blade gap selection, and pass/fail threshold configuration. All measured data—including raw fold counts, statistical summaries, and system diagnostics—are retained in non-volatile memory and exportable via printed report. Though not FDA 21 CFR Part 11 compliant out-of-the-box, the device can be integrated into validated laboratory information management systems (LIMS) through RS-232 serial output (optional interface module available), enabling centralized data archiving and electronic signature support where required by GMP or ISO/IEC 17025-accredited facilities.

Applications

• Quality assurance of folding cartons, cereal boxes, pharmaceutical blister packaging, and retail packaging substrates
• R&D evaluation of fiber furnish composition, refining degree, sizing agents, and coating formulations on flex fatigue performance
• Supplier qualification testing against contractual fold endurance specifications (e.g., minimum 5,000 MIT folds for premium corrugated liners)
• Comparative analysis of recycled vs. virgin fiber blends in sustainable packaging development
• Process validation of creasing, scoring, and die-cutting operations where fold integrity directly impacts end-use functionality

FAQ

What standards does the DRK111A comply with?

It conforms to ISO 5626, GB/T 2679.5, GB/T 457, and QB/T 1049 for fold endurance testing of paper and board.
Can the instrument test materials thicker than 1 mm?

No—the mechanical design and standard test protocols are strictly limited to specimens ≤1 mm thick; exceeding this may compromise measurement validity and damage folding heads.
Is calibration certification included with delivery?

A factory calibration report is provided; users are advised to perform periodic verification using certified reference standards per internal SOPs or ISO/IEC 17025 requirements.
Does the DRK111A support data export to Excel or LIMS?

Direct USB or Ethernet connectivity is not built-in, but RS-232 output enables integration with third-party data acquisition software or LIMS via compatible interface hardware.
What maintenance is required for long-term reliability?

Routine cleaning of folding heads, periodic lubrication of drive rails, and annual verification of tension spring calibration are recommended per the maintenance schedule in the operator manual.