ChemInstruments S-RT-10 Room Temperature 10-Bank Shear Adhesion Tester

Overview

The ChemInstruments S-RT-10 Room Temperature 10-Bank Shear Adhesion Tester is an engineered solution for standardized shear hold-time evaluation of pressure-sensitive adhesives (PSAs) under ambient conditions. It operates on the principle of constant-load, vertical-shear testing—where a defined mass applies uniaxial tensile stress to a bonded specimen mounted at a controlled angle relative to the substrate. This configuration replicates real-world service conditions where adhesive joints are subjected to sustained gravitational or mechanical shear forces. Designed and validated per internationally recognized test protocols—including PSTC-7 (Procedures A and B), ASTM D3654 (Procedure A), TLMI Test No. 7, and PSTC-14—the S-RT-10 delivers high reproducibility in measuring holding power (time-to-failure) and angular adhesion performance at fixed stress levels. Its rigid steel frame, corrosion-resistant finish, and self-contained power supply ensure operational stability across laboratory, QC, and contract testing environments without dependency on external infrastructure.

Key Features

• 10 independent test stations enabling parallel evaluation of replicate specimens—significantly improving throughput and statistical robustness per test cycle.
• Precision-machined stainless-steel test plates (50 mm × 75 mm), compliant with PSTC dimensional specifications and surface roughness requirements for consistent bond interface geometry.
• Adjustable test angle mechanism calibrated from 90° to 178°, facilitating method-specific alignment per PSTC-7A (178° ± 2°) or PSTC-14 (90° ± 1°).
• Dual-weight calibration capability using certified 100 g and 1000 g masses; integrated mechanical release switch ensures synchronized load application across all banks.
• High-resolution battery-powered digital timer with 0.1-minute resolution and automatic stop-on-failure detection—eliminating manual observation error.
• Acoustic-dampening foam base mitigates mechanical shock from falling weights, preserving structural integrity during extended test sequences and reducing ambient vibration transmission.
• Integrated leveling feet and bubble-level indicator allow rapid horizontal alignment of each test plate—critical for minimizing parasitic bending moments during shear loading.

Sample Compatibility & Compliance

The S-RT-10 accommodates standard PSA-coated tapes, labels, transfer adhesives, and laminates applied to fiberboard, stainless steel, or other substrates specified in PSTC-14 and ASTM D3654. All hardware—including TP-23 test plates, STC-100 hanging clamps, and optional 500 g / 1000 g calibrated weights—is traceable to NIST standards and supplied with documented conformity to PSTC Annex B material specifications. The instrument supports full compliance with GLP documentation workflows: test parameters, operator ID, date/time stamps, and failure events are manually recorded in accordance with 21 CFR Part 11–aligned laboratory notebooks. While the S-RT-10 itself does not generate electronic audit trails, its mechanical design enables seamless integration into validated paper-based or hybrid QA systems meeting ISO/IEC 17025 and ASTM E2500 verification requirements.

Software & Data Management

The S-RT-10 is a fully mechanical, analog-operated tester with no embedded firmware or digital control interface. This architecture eliminates software validation obligations while ensuring long-term reliability and immunity to cybersecurity vulnerabilities. All timing and load data are captured externally via user-defined log sheets or LIMS-integrated templates. ChemInstruments provides companion documentation kits—including editable Excel-based data entry forms, PSTC-aligned reporting checklists, and calibration verification logs—to support traceable recordkeeping. For laboratories requiring electronic data capture, the S-RT-10 is compatible with third-party time-lapse imaging systems or programmable logic controllers (PLCs) interfaced via dry-contact relay outputs (available upon request).

Applications

• Quality control of PSA formulations for medical device fixation tapes, HVAC duct sealants, and automotive trim bonding tapes.
• Comparative shelf-life assessment of aging effects on shear resistance—when paired with accelerated thermal cycling per PSTC-9.
• Regulatory submission support for FDA 510(k) or CE-marking dossiers requiring PSTC-7-compliant holding power data.
• Supplier qualification testing against contractual shear retention thresholds (e.g., ≥10,000 min @ 1 kg, 23°C, 50% RH).
• Research into viscoelastic relaxation mechanisms of acrylic and rubber-based PSAs under static shear stress.
• Validation of surface energy modification treatments on low-surface-energy substrates (e.g., polyolefins) using PSTC-14 fiberboard adhesion metrics.

FAQ

Does the S-RT-10 require external power or compressed air?

No—it operates on internal 9 V DC battery power for the timer and uses gravity-driven mechanical actuation; no AC outlet or pneumatic source is needed.
Can it be used for elevated-temperature shear testing?

No—this model is strictly rated for room-temperature operation (20–25°C). For thermal shear evaluation, ChemInstruments offers the S-HT series with environmental chamber integration.
Is calibration certification included with shipment?

Yes—each unit ships with a factory-issued calibration report covering angle adjustment accuracy, plate flatness (±0.05 mm), and timer linearity (±0.1 min over 24 h).
What maintenance is required?

Annual inspection of weight drop mechanism clearance, lubrication of pivot joints with silicone grease, and visual verification of plate surface finish per PSTC-7 Annex C.
Are replacement parts available globally?

Yes—TP-23 plates, STC-100 clamps, and calibrated weights are stocked by ChemInstruments’ regional distribution centers in North America, Europe, and APAC, with lead times ≤5 business days.