ISO 527-3:1995 pdf download.Plastics - Determination of tensile properties
The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 527. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO 527 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 527-1:1993, Plastics 一Determination of tensile properties一Part 1: General principles.
ISO 4591:1992, Plastics 一Film and sheeting一De-termination of average thickness of a sample, and average thickness and yield of a roll, by gravimetric techniques (gravimetric thickness).
ISO 4593:1993, Plastics 一Film and sheeting一De-terrnination of thickness by mechanical scanning.
In 5.2, devices complying with the requirements in ISO 4593 shall be used for measuring the thickness,except in the case of very thin film (less than 0.01 mm thick) or embossed film. In those cases, the thickness shall be determined by the method speci-fied in ISO 4591. When ISO 4591 is used, the average thickness of the filtm sample shall be taken as the thickness of the test specimen.
Some film materials have a very high elongation at break which may result in them being outside the stretching capacity of the testing machine. In such cases. it is permissible to reduce the initial distance between the grips tu 50 mm.
6.1.2 When required by the specification for the material under test or for routine quality-control tests,dumb-bell specimen types 5, 1B and 4 of the shape and dimensions shown in figures 2, 3 and 4 may be used. These specimens are convenient to produce and permit rapid qualty-control testing.
Specimen type 5 (figure2) is recommended for film and sheet with a very high strain at break. Spccimcn type 4 is recommended for other types of flexible thermoplastic sheet.Specimen type 1B (figure 3) is recommended for rigid
sheets.
6.2.1 The test specimens doscribed in 6.1.1 shall be cut or punched so that the edges are smooth and free from notches; examination with a low-power magni-fier is recommended to check the absence of notches. Razor blades, suitable paper cutters, scalpels or other devices capable of cutting the specimens to the proper width and producing straight, clean, parallel edges with no visible imperfections shall be used.Punch dies shall be kept sharp by regular honing, and a suitable backing material shall be used with punch dies to ensure a clean-cut edge.ISO 527-3 pdf download