ChemInstruments S-HT-8 High Temperature 8-Bank Shear Tester
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | S-HT-8 |
| Pricing | Available Upon Request |
Overview
The ChemInstruments S-HT-8 High Temperature 8-Bank Shear Tester is a precision-engineered mechanical testing system designed for evaluating the holding power (shear adhesion) of pressure-sensitive adhesives (PSAs) under controlled elevated temperature conditions. It operates on the principle of constant-load, vertical-shear testing—where a standardized test specimen is affixed to a vertical stainless-steel substrate and subjected to a defined static mass for a specified duration. The time-to-failure (slippage or detachment) is recorded as the primary performance metric. This methodology aligns with fundamental rheological concepts of viscoelastic creep under sustained stress, enabling quantitative assessment of adhesive thermal stability and cohesive strength degradation at elevated temperatures. The S-HT-8 supports standardized test protocols widely adopted across global R&D, quality control, and regulatory validation workflows—including ASTM D3654 (Procedure C), PSTC-7 (Procedures A and C), FINAT Test Method No. 8, and TLMI Test No. 7—ensuring data comparability and audit readiness in ISO/IEC 17025-accredited laboratories.
Key Features
- Eight independent, parallel test stations enable high-throughput evaluation with statistical reproducibility—reducing inter-test variability through simultaneous conditioning and loading.
- Thermally robust front-panel toggle switches rated for continuous operation up to 400°F (204°C), eliminating electrical failure risks during prolonged high-temperature exposure.
- Adjustable test angle from 90° (horizontal shear) to 178° (near-vertical), facilitating method-specific alignment per ASTM D3654 and PSTC-7 requirements.
- Leveling-adjustable test plate platform ensures consistent specimen orientation and uniform load distribution across all eight banks.
- Modular, removable test frame allows seamless integration into environmental chambers—supporting concurrent temperature (–40°C to +204°C) and humidity (10–95% RH non-condensing) conditioning per ISO 29862 and ASTM D1002 Annex A3.
- Standardized 2″ × 3″ (50 mm × 75 mm) stainless-steel test plates comply with PSTC-1, ASTM D3654, and FINAT specifications for surface finish, flatness, and material grade (AISI 304).
- Dual calibrated mass sets (100 g and 1000 g) provide traceable mechanical verification of actuation force and switch response thresholds.
Sample Compatibility & Compliance
The S-HT-8 accommodates standard PSA-coated tapes, labels, transfer adhesives, and laminates mounted on release liners or backing substrates. Specimen width is constrained by the 2-inch (50 mm) test plate dimension; length must exceed 3 inches (75 mm) to ensure adequate bonding area and prevent edge effects. All test configurations adhere to the dimensional tolerances, surface preparation, and dwell-time stipulations outlined in ASTM D3654-22, PSTC-7-2021, FINAT FM8:2022, and TLMI TM-7:2020. The system’s mechanical architecture—free of electronics in the test zone—ensures intrinsic compliance with Class I, Division 2 hazardous location requirements when deployed in solvent-rich manufacturing environments. Documentation packages include calibration certificates traceable to NIST standards and installation qualification (IQ) templates aligned with FDA 21 CFR Part 11 data integrity expectations for electronic records.
Software & Data Management
The S-HT-8 is a standalone mechanical instrument with no embedded firmware or digital interface. Timing functions are executed via external, user-supplied stopwatch or programmable timer systems meeting ISO/IEC 17025 timing accuracy requirements (±0.1 s). For GLP/GMP-aligned operations, laboratories routinely integrate the tester with validated LIMS or ELN platforms using manual entry or barcode-scanned test ID logging. Audit trails for test parameters—including temperature setpoint, mass applied, angle setting, and operator ID—are maintained in bound logbooks or electronic records compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Optional accessories include NIST-traceable digital thermometers and calibrated load cells for periodic performance verification.
Applications
- Accelerated thermal aging studies of acrylic, rubber-based, and silicone PSAs used in medical device fixation, automotive trim bonding, and electronics assembly.
- QC release testing of hot-melt adhesives in packaging applications where service temperatures exceed 60°C.
- Formulation screening for high-temperature masking tapes used in aerospace paint-bake cycles (120–180°C).
- Regulatory submission support for FDA 510(k) dossiers requiring shear stability data per ISO 10993-5 cytotoxicity correlation protocols.
- Root-cause analysis of field failures linked to adhesive creep in solar panel backsheet lamination or EV battery module bonding.
FAQ
Does the S-HT-8 include integrated temperature control?
No—the S-HT-8 is a mechanically actuated shear tester. Temperature conditioning is achieved externally using compatible ovens, humidity chambers, or environmental rooms. The unit itself is engineered to withstand ambient temperatures up to 204°C without performance degradation.
Can it be used for low-temperature shear testing?
Yes—its structural materials and switch design permit stable operation down to –40°C when placed inside certified freezer chambers, supporting cold-weather PSA validation per ASTM D1002 Annex A4.
Is operator training required for ISO 17025 accreditation?
Yes—users must demonstrate documented competency in method execution, environmental monitoring, mass calibration, and result recording per laboratory-specific SOPs aligned with ISO/IEC 17025 Clause 6.2.
What maintenance is recommended?
Monthly visual inspection of switch actuation smoothness, quarterly cleaning of test plate surfaces with isopropyl alcohol, and annual verification of leveling mechanism repeatability using a spirit level calibrated to ±0.1°.
Are replacement test plates available?
Yes—ChemInstruments supplies certified AISI 304 stainless-steel plates (50 mm × 75 mm, Ra ≤ 0.8 µm) with individual surface finish certification reports.
