YueLian / PW PW-UH8 High-Speed Unwinding Force Tester

Overview

The YueLian / PW PW-UH8 High-Speed Unwinding Force Tester is an electromechanical instrumentation system engineered for precise, repeatable measurement of peel resistance during high-velocity tape unwinding operations. It operates on the principle of controlled dynamic tension measurement: a motor-driven unwind shaft rotates the test specimen at programmable linear speeds while a calibrated load cell captures real-time tensile force exerted at the leading edge of the tape as it separates from the roll core. This methodology directly simulates industrial converting, packaging line feeding, and automated dispensing conditions where adhesive performance under transient mechanical stress—rather than static peel—is critical to functional reliability. Unlike low-speed peel testers governed by ASTM D903 or ISO 8510, the PW-UH8 is specifically designed to replicate the inertial and viscoelastic loading regimes encountered when pressure-sensitive adhesive (PSA) tapes are deployed at production-line velocities up to 122 m/min.

Key Features

• Programmable unwinding speed range from 0 to 122 m/min (±3 m/min tolerance), enabling simulation across multiple converting process windows including label application, die-cutting feed, and medical device assembly.
• High-fidelity force transduction via selectable precision load cells (10 kg, 20 kg, or 50 kg capacity), each certified to ±0.1% full-scale accuracy and delivering 1/300,000 internal resolution for detection of subtle force fluctuations during stick-slip transitions.
• Dedicated A99 test software with synchronized data acquisition, automatically capturing and timestamping peak, average, and instantaneous force values at user-defined unwound fractions—specifically 25%, 50%, and 75% of total length—as required by PSTC-8 and PSTC-13 protocols.
• Modular drum interface accommodating standard 75 mm core diameters (custom cores available up to 300 mm outer diameter), supporting both slit rolls and master jumbo rolls within ≤75 mm web width constraints.
• Full SI and imperial unit support—including N, kN, kgf, lbf, ozf—with real-time display and post-test unit conversion without data reacquisition.
• Compact benchtop footprint (50 × 40 × 30 cm) with rigid aluminum frame and vibration-damped base, suitable for QC laboratories, R&D cleanrooms, and production-floor validation stations.

Sample Compatibility & Compliance

The PW-UH8 is validated for testing single-coated and double-coated pressure-sensitive adhesive tapes—including acrylic, rubber-based, and silicone formulations—on paper, film, foil, and nonwoven carriers. Its mechanical architecture conforms to the geometric and kinematic requirements of ASTM D1000 (“Standard Test Method for Pressure-Sensitive Tape—Roll Unwind Resistance”) and AFERA Standard 4008 (“Test Method for Unwinding Force of Self-Adhesive Tapes”). It also supports the procedural specifications outlined in PSTC-8 (“Peel Adhesion of Pressure-Sensitive Tapes”) and PSTC-13 (“Roll Unwind Resistance of Pressure-Sensitive Tapes”), including ambient temperature control (23 ±2°C) and relative humidity conditioning (50 ±5% RH) per ISO 291. While not intrinsically GLP/GMP-certified, the system’s deterministic motion control, audit-ready digital output, and software-generated test reports facilitate compliance with FDA 21 CFR Part 11 when integrated into validated laboratory information management systems (LIMS).

Software & Data Management

The A99 test software provides a Windows-based interface with intuitive parameter configuration, real-time force-vs.-distance curve visualization, and automated pass/fail evaluation against user-defined upper/lower limits. All raw data—including time-stamped force arrays, speed profiles, and positional metadata—are saved in .csv and proprietary binary formats. Export functions support direct integration with statistical process control (SPC) platforms such as Minitab and JMP. Audit trails record operator ID, calibration status, test date/time, and software version; electronic signatures may be enabled via third-party digital signature modules compliant with ISO/IEC 17025 documentation requirements.

Applications

• Quantifying unwinding consistency of linerless labels in high-speed applicators.
• Evaluating edge lift propensity of masking tapes during robotic dispensing.
• Validating lot-to-lot stability of PSA adhesion under shear-dominated unwinding stress.
• Supporting root-cause analysis of slitting defects related to excessive backside adhesion (blocking).
• Generating technical dossiers for ISO 9001:2015 Clause 8.5.1 (Control of Production) and IATF 16949 Section 8.5.1.2 (Control of Production Process).

FAQ

What standards does the PW-UH8 explicitly support?
ASTM D1000, AFERA 4008, PSTC-8, and PSTC-13 — with full alignment to specimen geometry, speed tolerance, and reporting structure defined therein.
Can the system accommodate non-standard core diameters?
Yes; the unwind mandrel is modular and accepts custom-engineered adapters for core diameters beyond 75 mm, up to a maximum roll outer diameter of 300 mm.
Is force data traceable to national metrology institutes?
Load cells are supplied with factory calibration certificates traceable to CNAS-accredited standards; field recalibration using NIST-traceable deadweight sets is supported.
Does the A99 software comply with FDA 21 CFR Part 11?
The base software does not include electronic signature or audit trail encryption features; however, it exports structured data compatible with validated Part 11-compliant LIMS environments.
What maintenance intervals are recommended?
Biannual verification of speed encoder linearity and load cell zero/balance drift is advised; no routine lubrication or consumable replacement is required within the first 5 years of operation under standard laboratory conditions.