Overview
EN ISO 8510-2:2010 (identical to ISO 8510-2:2006) defines a standardized 180° peel test to determine the peel resistance of a bonded assembly where one adherend is flexible and the other is rigid. The method is used to characterise adhesive performance under controlled conditions and to report reproducible peel force values for quality control, R&D and specification compliance.
Key topics and technical requirements
- Scope: Measures peel resistance for flexible-to-rigid bonded assemblies (180° peel). (A 90° peel variant is given in ISO 8510-1 for less flexible adherends.)
- Apparatus: Tensile testing machine with constant grip-separation rate and force measurement accuracy within ±2%; grips to clamp the rigid adherend and a self-aligning grip for the flexible adherend.
- Specimen geometry and materials:
- Rigid adherend width: 25.0 mm ± 0.5 mm, minimum length 200 mm.
- Recommended adherend thicknesses: metals 1.5 mm; plastics 1.5 mm; wood 3 mm; compounded rubbers 2 mm (other thicknesses by agreement).
- Flexible adherend: bendable through 180° without gross irreversible change; recommended length ≥ 350 mm; width equal to rigid adherend or 5 mm wider at each edge for fraying-prone materials.
- Preparation: Surface treatment per ISO 17212 or manufacturer instructions. Apply adhesive over full width to 150 mm length; pressing with up to 1 MPa recommended; measure adhesive thickness where practicable.
- Conditioning and atmosphere: Use standard atmospheres from ISO 291.
- Test procedure: Bend back the free end, clamp specimens, and apply a constant separation rate. Recommended rate 100 mm/min ± 10 mm/min. Record force vs. separation autographically and continue until at least 125 mm of bonded length has separated.
- Results expression: For each specimen determine the average peel force (N) over at least 100 mm of peel length, excluding the first 25 mm; report maximum/minimum forces and arithmetic means across at least 5 specimens.
- Reporting & precision: Include adhesive and adherend IDs, surface prep, test conditions, and failure mode (adhesive, cohesive, adherend). Inter-laboratory precision is not yet available (no precision statement).
Applications and users
- Who uses it: adhesive manufacturers, materials test labs, automotive and aerospace engineers, manufacturers of tapes/laminates, quality control and R&D teams, and standards writers.
- Practical uses: comparative performance testing, incoming quality control, product development (adhesive selection), contract acceptance testing, and forensic analysis of bonded joint failures.
Related standards
- ISO 8510-1 - 90° peel test (alternative for less flexible adherends)
- ISO 291 - Standard atmospheres for conditioning/testing
- ISO 17212 - Surface preparation guidelines for bonding
- ISO 5725 - Statistical treatment of precision and accuracy
- EN 28510-2:1993 - superseded by EN ISO 8510-2:2010
Keywords: adhesives peel test, 180° peel, EN ISO 8510-2, peel resistance, flexible-to-rigid bond, tensile testing, adhesive testing standard.
