ISO 17194:2022 pdf – Structural adhesives — Standard database of properties

ISO 17194:2022 pdf – Structural adhesives — Standard database of properties.
1 Scope This document specifies a set of basic properties commonly required for the selection and use of structural adhesives in different applications. ISO standard test methods and test conditions are also reviewed for the measurement of these data to facilitate traceability of recorded values (see Introduction). 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 62, Plastics — Determination of water absorption ISO 527-1, Plastics — Determination of tensile properties — Part 1: General principles ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and extrusion plastics ISO 868, Plastics and ebonite — Determination of indentation hardness by means of a durometer (Shore hardness) ISO 1183 (all parts), Plastics — Methods for determining the density of non-cellular plastics ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids ISO 2555, Plastics — Resins in the liquid state or as emulsions or dispersions — Determination of apparent viscosity using a single cylinder type rotational viscometer method ISO 2577, Plastics — Thermosetting moulding materials — Determination of shrinkage ISO 3219 (all parts), Plastics — Polymers/resins in the liquid state or as emulsions or dispersions — Determination of viscosity using a rotational viscometer with defined shear rate ISO 11339, Adhesives – T-peel test for flexible-to-flexible bonded assemblies ISO 4587, Adhesives — Determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies ISO 6721-4, Plastics — Determination of dynamic mechanical properties — Part 4: Tensile vibration — Non-resonance method
3? Terms? and? definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https:// www .iso .org/ obp — IEC Electropedia: available at https:// www .electropedia .org/ 4 Principle A list is presented of properties that are generally useful for the selection and application of structural adhesives. Recommended test methods and test conditions are given for each property to help in the determination of values and to promote the presentation of traceable and comparable data. 5 Test specimens Where possible, use the test specimens recommended in the test method standards employed to measure the properties given in Tables 1, 2 and 3. If alternative test methods are used, the test method reference shall be recorded with the results. The preparation of test specimens shall be as specified in ISO 17212 for joint specimens and ISO 15166-1 or ISO 15166-2 for bulk specimens. Since the properties of adhesives generally depend on the concentration of absorbed water, specimens shall be stored dry or in an atmosphere of (50 ± 10) % RH at (23 ± 2) °C prior to testing, for a sufficient time to reach zero or equilibrium water content as indicated by no significant further changes in the mass of the specimen with storage time. 6 Test conditions Where possible, use the test conditions specified for each property in Tables 1, 2 and 3. If alternative test conditions are used, these shall be recorded with the results.
Data measured using the test method and conditions given in Table 2 reveal the influence on the lap shear strength of the adhesive of exposure to different environments. The tolerance on the test and exposure temperatures specified in Table 2 shall be ±3 °C, except at 23 °C where the tolerance shall be ±2 °C. Results obtained using the conditions specified in the first row of the table show the dependence of shear strength on temperature separately from the effects of any ageing. In subsequent rows, specimens are subjected to exposure for 30 days in the environments shown and then tested at (23 ± 2) °C. The procedure for conditioning specimens shall be in accordance with ISO 9142 for the procedure for conditioning specimens. Where it is known that a particular adhesive is not recommended for use with the chemicals shown in Table 2, then the letters NR shall be given in place of experimental values. Record cure temperature, cure time, post-cure temperature and post-cure time used for specimen preparation. Also record adherend material and surface treatment (see ISO 17212).