Overview
ISO 8510-2:2006 defines a standardized 180° peel test for determining the peel resistance of a bonded assembly where one adherend is flexible and the other is rigid. The standard sets out the principle, apparatus, specimen preparation, conditioning, test procedure and reporting requirements to ensure reproducible measurement of peel force for quality control, adhesive development and comparative testing.
Keywords: ISO 8510-2, 180° peel test, peel resistance, adhesive testing, flexible-bonded-to-rigid
Key topics and technical requirements
- Test principle: Progressive separation by pulling the flexible adherend back over the rigid adherend at a steady grip-separation rate so separation occurs along the bond plane.
- Apparatus: Tensile testing machine with a force-measuring system (indicated force within ±2% of true force) and appropriate grips (fixed grip for the rigid adherend and a self-aligning grip for the flexible adherend).
- Specimen geometry:
- Rigid adherend: strip width 25.0 mm ± 0.5 mm, minimum length 200 mm.
- Flexible adherend: capable of 180° bend without irreversible change; minimum length 350 mm (unless specified); width equal to rigid adherend or 5 mm wider each edge for fraying-prone materials.
- Recommended adherend thicknesses: metals 1.5 mm; plastics 1.5 mm; wood 3 mm; compounded rubbers 2 mm (or as agreed).
- Preparation: Surface preparation per ISO 17212 (or manufacturer’s instructions); bond length typically 150 mm; use of anti-adhesive strip to create a sharp adhesive boundary; even pressure application (press up to 1 MPa recommended).
- Conditioning and atmosphere: Use standard atmospheres per ISO 291.
- Procedure: Recommended grip separation rate 100 mm/min ± 10 mm/min; record force vs. separation (preferably autographic); continue until at least 125 mm of bonded length has separated; note failure mode (adhesive, cohesive, adherend).
- Results and reporting:
- Determine average peel force over at least 100 mm excluding first 25 mm.
- Test a minimum of five specimens; report average, max and min forces and failure types.
- Include full details on adhesive, adherends, bonding, conditioning and any deviations.
- Precision: No inter-laboratory precision statement at time of publication; data being collected for future revision.
Applications and users
Practical use cases include testing tapes, labels, laminates, protective films, flexible-to-rigid laminations and other bonded assemblies where peel behavior affects performance. Typical users:
- Materials and adhesives manufacturers (R&D and QC)
- Test laboratories and conformity assessment bodies
- Automotive, aerospace, packaging, electronics and construction product developers
- Procurement and supplier verification teams
Related standards
This standard provides a repeatable method to quantify peel resistance for flexible-to-rigid bonds, enabling consistent product specification, quality control and comparative adhesive evaluation.
Open preview (PDF)Adhesives — Peel test for a flexible-bonded-to-rigid test specimen assembly — Part 2: 180° peel