HengaoDe HAD-SKL-03 Bookbinding Strength Tester
| Brand | HengaoDe |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | HAD-SKL-03 |
| Force Range | 20–500 N |
| Accuracy | ±1% FS |
| Max. Specimen Length | 310 mm |
| Min. Specimen Width | 100 mm |
| Display | 4-digit LED |
| Print Output | 4 significant digits |
| Crosshead Speed | 2–60 mm/min |
| Speed Accuracy | ±5% |
| Power Supply | AC 380 V |
| Weight | ~60 kg |
Overview
The HengaoDe HAD-SKL-03 Bookbinding Strength Tester is an engineered mechanical tensile testing system designed specifically for quantitative evaluation of adhesive bond integrity in printed publications. It operates on the principle of controlled uniaxial peeling—applying a precisely regulated tensile force perpendicular to the spine of bound book blocks—to measure the force required to separate glued or thermally fused pages from the cover or backbone. This method complies with the technical requirements outlined in the Chinese National Press and Publication Industry Standard (CY/T 27–2020), which references ISO 12625-5 and ASTM D903 for peel strength methodology. The instrument employs a servo-controlled crosshead drive and high-stability load cell architecture to ensure repeatable, traceable measurements under static and quasi-static loading conditions. Its structural design minimizes localized stress concentration at clamping points, thereby reducing premature page tearing and enabling true bond failure assessment rather than substrate rupture.
Key Features
- Compliant with CY/T 27–2020 and aligned with ISO 12625-5 peel test protocols for paper-based laminates
- Adjustable crosshead speed (2–60 mm/min) with ±5% linearity tolerance across full range
- Dual-clamp configuration featuring ergonomic, quick-release mechanisms for rapid specimen loading (100–310 mm width/length adaptability)
- Integrated peak-hold function with digital display (4-digit LED) and optional thermal printer output (4 significant digits)
- Overload protection circuitry limiting force application beyond 130% of full-scale capacity (650 N)
- Robust cast-iron frame with vibration-damped base, supporting long-term calibration stability
- CE-marked power interface and EMI-shielded signal conditioning electronics
Sample Compatibility & Compliance
The HAD-SKL-03 accommodates standard commercial book formats including perfect-bound, saddle-stitched, and case-bound volumes. Specimens must maintain minimum spine thickness ≥0.5 mm and exhibit uniform adhesive layer distribution. Testing is validated for EVA-based hot-melt adhesives, PUR systems, and dispersion-type glues used in high-speed binding lines. Data generated meets documentation requirements for ISO 9001 internal audits and GLP-compliant print quality control records. All mechanical components conform to GB/T 2611–2007 (General Requirements for Testing Machines) and GB/T 16825.1–2008 (Verification of Force Measuring Systems). Calibration certificates are traceable to CNAS-accredited national metrology institutes.
Software & Data Management
While the base unit operates as a standalone analog-digital hybrid tester, optional RS-232 or USB-to-serial interface enables direct data logging into laboratory information management systems (LIMS). The included PC software supports batch reporting, statistical process control (SPC) charting (X̄–R, Cpk), and export to CSV/Excel formats. Audit trails comply with FDA 21 CFR Part 11 requirements when deployed with user authentication and electronic signature modules. Raw force–displacement curves are captured at ≥10 Hz sampling rate; peak force, average peel resistance, and failure mode classification (adhesive vs. cohesive vs. substrate failure) are automatically annotated.
Applications
- Quality assurance of bookbinding lines in commercial printing facilities
- R&D validation of new adhesive formulations under variable humidity/temperature preconditioning
- Comparative analysis of spine durability after accelerated aging (e.g., 40°C/75% RH for 72 h)
- Supplier qualification testing per contractual peel strength thresholds (e.g., ≥80 N for trade paperbacks)
- Root cause analysis of field failures involving delamination or page dropout
- Educational use in graphic communications curricula for hands-on material science instruction
FAQ
Is the HAD-SKL-03 suitable for testing hardcover case bindings?
Yes—provided the specimen’s spine width falls within the 100–310 mm clamping range and the cover board thickness does not exceed 5 mm. Optional reinforced jaw inserts are available for rigid substrates.
Does the instrument require annual recalibration?
Per ISO/IEC 17025 recommendations, we advise biannual verification using certified reference load cells (Class M1 or better) and documented environmental monitoring (temperature ±2°C, humidity 45–55% RH).
Can test data be exported to Excel without proprietary software?
Yes—ASCII-formatted output via serial interface supports direct import into spreadsheet applications using standard delimiter protocols.
What maintenance is required for long-term accuracy?
Monthly lubrication of lead screws, quarterly inspection of load cell mounting bolts, and annual verification of encoder resolution and motor torque response.
Is the device compatible with ASTM D3330 peel test standards?
While optimized for CY/T 27–2020, its force resolution (0.1 N), speed control fidelity, and jaw alignment meet ASTM D3330 Class B instrumentation criteria for 90° peel testing.
