ISO 180:2000 pdf download – Plastics – Determination of Izod impact strength
1.4 The method is not normally suitable for use with rigid cellular materials and sandwich structures containing cellular material. Also, notched specimens are not normally used for long-fibre-reinforced composites or thermotropic liquid-crystal polymers.
1.5 The method is suited to the use of specimens which may be either moulded to the chosen dimensions, machined from the central portion of a standard multipurpose test specimen (see ISO 31 67) or machined from finished or semifinished products such as mouldings, laminates and extruded or cast sheet.
1.6 The method specifies preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions or with different notches, or specimens which are prepared under different conditions, may produce results which are not comparable. Other factors, such as the energy capacity of the apparatus, its impact velocity and the conditioning of the specimens can also influence the results. Consequently, when comparative data are required, these factors must be carefully controlled and recorded.
1.7 The method should not be used as a source of data for design calculations. Information on the typical behaviour of a material can be obtained, however, by testing at different temperatures, by varying the notch radius and/or the thickness and by testing specimens prepared under different conditions.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 291:1997, Plastics 一Standard atmospheres for conditioning and testing.
ISO 293:1986, Plastics 一Compression moulding test specimens of thermoplastic materials.
ISO 294-1:1996, Plastics – Injection moulding of test specimens of thermoplastic materials – Part 1: General
principles, and moulding of multipurpose and bar test specimens.
ISO 295:1991, Plastics 一Compression moulding of test specimens of thermosetting materials.
ISO 1268:19741), Plastics – Preparation of glass fibre reinforced, resin bonded, low pressure laminated plates or panels for test purposes.
ISO 2602:1980, Statistical interpretation of test results – Estimation of the mean- Confidence interval.
ISO 2818:1994, Plastics – Preparation of test specimens by machining.
ISO 3167:- _2), Plastics 一Multipurpose test specimens.
ISO 10724-1:1998, Plastics – Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs)一Part 1: General principles and moulding of multipurpose test specimens.
ISO 13802:1999, Plastics 一Verification of pendulum impact-testing machines一Charpy, lzod and tensile impact- testing.
5.1.2 Some plastics are sensitive to clamping pressure. When testing such materials, a means of standardizing the clamping force shall be used and the clamping force shall be recorded in the test report. The clamping force can be controlled by using a calibrated torque wrench or a pneumatic or hydraulic device on the vice clamping screw.