ISO 813-2:2024
Rubber, vulcanized or thermoplastic — Determination of adhesion to a rigid substrate — Part 2: Adhesion of a soft thermoplastic elastomer layer
- Standard No.
- ISO 813-2:2024
- Release Date
- 2024
- Published By
- International Organization for Standardization (ISO) IX / ISO
- Latest
- ISO 813-2:2024
- Introduction
Analysis of the core content of the standard
The ISO 813-2:2024 standard establishes a standardized 90° peel test method for the interfacial adhesion performance of thermoplastic elastomers (TPE) and rigid substrates. This standard is applicable to soft components within the Shore A hardness range and provides a unified benchmark for the evaluation of the interfacial performance of material combinations by quantifying the peel strength (WS) and the fracture mode classification.
Comparison of key technical requirements
Parameters ISO 813-2 requirements Test significance Specimen size Soft layer thickness 2±0.2mm (low hardness can be increased to 3±0.2mm) Ensure consistency of stress distribution Test speed 100±10 mm/min Control the influence of strain rate Test environment 23±2℃/50±10% RH Eliminate temperature and humidity interference Surface roughness of substrate Ra 2.20-3.20μm Standardized mechanical fitting conditions
Key points of test process
1. Sample preparation:Two-component injection molding is preferred. Attention should be paid to:
- Avoid defects such as spray marks and flow marks (see standard Figure 4)
- Flashing is prohibited on the end face of hard substrate
- At least 5 valid samples per group
2. Equipment calibration:
- The tensile machine must meet the Class 1 accuracy of ISO 5893
- The horizontal movement resistance of the test trolley ≤4N (monthly calibration)
- Calibrate the system according to Appendix B
3. Fracture mode classification:A two-level character coding system is used:
- The first character indicates the residual TPE ratio of the hard substrate (A:0%; B:1-50%; C:51-99%)
- The second character indicates the failure location (D indicates a fracture in the TPE layer)
Technology evolution and implementation suggestions
Compared with the traditional vulcanized rubber test method, this standard makes the following improvements on the characteristics of thermoplastic elastomers:
- Introduction of core-back injection molding process specifications
- Addition of graphical judgment criteria for interface defects
- Development of a dedicated test trolley system to ensure a 90° peeling angle
Implementation suggestions:
- It is recommended to perform multi-peak curve analysis in conjunction with ISO 6133
- For mixed fracture modes such as A/D and B/D, the peeling length needs to be recorded
- The test report should include the injection molding process parameters (see Appendix A)
ISO 813-2:2024 Referenced Document
- ISO 18899:2013 Rubber - Guide to the calibration of test equipment
- ISO 23529 Rubber General procedures for preparing and conditioning test pieces for physical test methods Amendment 1
- ISO 5893 Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of traverse) — Specification — Amendment 1
- ISO 6133 Rubber and plastics - Analysis of multi-peak traces obtained in determinations of tear strength and adhesion strength
ISO 813-2:2024 history
- 2024 ISO 813-2:2024 Rubber, vulcanized or thermoplastic — Determination of adhesion to a rigid substrate — Part 2: Adhesion of a soft thermoplastic elastomer layer
