Norm

ISO/DIS 178:2017 en

Kunststoffen - Bepaling van de buigeigenschappen

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Over deze norm

Status Ontwerp
Aantal pagina's 27
Commissie Kunststoffen
Gepubliceerd op 09-05-2017
Taal Engels
This International Standard specifies a method for determining the flexural properties of rigid (see 3.12) and semi-rigid plastics under defined conditions. A standard test specimen is defined, but parameters are included for alternative specimen sizes for use where appropriate. A range of test speeds is included.┬áThe method is used to investigate the flexural behaviour of the test specimens and to determine the flexural strength, flexural modulus and other aspects of the flexural stress/strain relationship under the conditions defined. It applies to a freely supported beam, loaded at midspan (three-point loading test).┬áThe method is suitable for use with the following range of materials: thermoplastic moulding, extrusion and casting materials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets; thermosetting moulding materials, including filled and reinforced compounds; thermosetting sheets. In agreement with ISO 10350-1 [5] and ISO 10350-2 [6], this International Standard applies to fibre-reinforced compounds with fibre lengths ≤ 7,5 mm prior to processing. For long-fibre-reinforced materials (laminates) with fibre lengths > 7,5 mm, see ISO 14125 [7]. The method is not normally suitable for use with rigid cellular materials or sandwich structures containing cellular material. In such cases, ISO 1209-1 [3] and/or ISO 1209-2 [4] can be used. NOTE For certain types of textile-fibre-reinforced plastic, a four-point bending test is preferred. This is described in ISO 14125.

Details

ICS-code 83.080.01
Nederlandse titel Kunststoffen - Bepaling van de buigeigenschappen
Engelse titel Plastics - Determination of flexural properties
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