Drick DRK182A Scott-Type Internal Bond Strength Tester

Overview

The Drick DRK182A Scott-Type Internal Bond Strength Tester is a precision mechanical impact instrument engineered for the quantitative assessment of inter-fiber bonding strength within paper and paperboard structures. It operates on the fundamental principle of the Scott internal bond test—where a standardized specimen is subjected to a controlled pendulum impact at a fixed 90° angle, inducing delamination between plies or fiber layers. The energy absorbed during the separation event is measured in kilogram-centimeters (kg·cm), directly correlating with the integrity of intra-sheet hydrogen bonding and mechanical entanglement. This method provides a robust, reproducible metric for evaluating sheet formation uniformity, refining efficiency, wet-end chemistry performance, and calendering effects—critical parameters in packaging-grade paper production where layer adhesion dictates resistance to blistering, ply separation, and structural failure under dynamic loads.

Key Features

• Electromechanical integrated architecture ensures stable pendulum release, precise angular alignment (90° ± 0.5°), and repeatable impact kinetics.
• High-resolution analog/digital dual-scale energy readout with 0.005 kg·cm minimum resolution supports statistical validation across multiple test repetitions.
• Modular specimen holder accommodates five standardized test specimens per sequence, enabling batch-wise evaluation aligned with TAPPI and ISO sampling protocols.
• Compact footprint (70 × 34 × 60 cm) and rigid cast-iron base (91 kg total mass) minimize vibration-induced measurement drift during operation.
• Tool-free maintenance design facilitates routine calibration verification, pivot bearing inspection, and anvil surface cleaning—reducing downtime in high-throughput QC environments.

Sample Compatibility & Compliance

The DRK182A is validated for use with all standard paper and paperboard substrates—including corrugated medium, linerboard, kraft, coated board, and recycled fiber composites—within thickness ranges of 0.10–1.2 mm. Specimens are prepared per TAPPI T 403 om-13 (cut to 12.7 × 12.7 mm) and conditioned at 23 °C ± 1 °C and 50 % RH ± 2 % for ≥24 h prior to testing. Instrument compliance is formally verified against GB/T 26203–2010 “Paper and Board — Determination of Internal Bond Strength (Scott Method)”, TAPPI UM-403 (revised 2017), and TAPPI T 569 pm-00. These standards mandate traceable calibration using certified reference weights and periodic verification of pendulum moment of inertia and impact velocity—procedures supported by the included calibration certificate and documented metrology protocol.

Software & Data Management

While the DRK182A operates as a stand-alone mechanical tester, its analog output signal (0–5 V DC proportional to impact energy) is compatible with third-party data acquisition systems supporting RS-232 or USB analog input. Users may integrate test results into LIMS or ERP platforms via CSV export, enabling automated calculation of mean internal bond values, coefficient of variation (CV%), and trend analysis across production lots. For regulated environments, the instrument supports GLP-compliant documentation when paired with audit-trail-enabled software (e.g., LabArchives or Thermo Fisher SampleManager), satisfying requirements for data integrity under FDA 21 CFR Part 11 where electronic records are employed.

Applications

• Quality assurance in corrugated box manufacturing: monitoring internal bond stability across recycled fiber blends and starch-based adhesive formulations.
• R&D evaluation of refining intensity, cationic starch dosing, and nanocellulose reinforcement effects on interlayer cohesion.
• Supplier qualification testing for linerboard and medium used in multi-ply packaging structures subject to compression and edge crush.
• Root-cause analysis of delamination defects observed in post-conversion processes such as flexographic printing or die-cutting.
• Validation of process consistency following changes in pulp furnish ratio, dryer section temperature profiles, or size press application rates.

FAQ

What standards does the DRK182A comply with?
It conforms to GB/T 26203–2010, TAPPI UM-403, and TAPPI T 569 pm-00 for Scott-type internal bond measurement.
Is operator training provided?
Yes—Drick offers on-site installation and operational training at no cost, covering specimen preparation, calibration verification, and result interpretation per ASTM D998 and ISO 16237 guidelines.
How often does the instrument require recalibration?
Annual calibration is recommended; however, daily verification using the supplied reference weight and quarterly pivot friction checks are required per TAPPI IST 2018.
Can the DRK182A be used for coated papers?
Yes—provided coating thickness does not exceed 15 µm per side and does not impede clean interlayer fracture propagation during impact.
What maintenance is required to ensure long-term accuracy?
Monthly inspection of pendulum pivot wear, annual replacement of nylon impact anvil, and biannual verification of specimen clamp parallelism using optical flat gauges.