Norm

NEN-EN-ISO 1133-2:2011 en

Kunststoffen - Bepaling van de smeltindex op basis van volume (MVR) en de smeltindex op basis van massa (MFR) van thermoplastische materialen - Methode voor materiaalgevoeligheid voor de geschiedenis van tijd-temperatuur en/of vocht

79,70

Over deze norm

Status Definitief
Aantal pagina's 16
Commissie Kunststoffen
Gepubliceerd op 01-12-2011
Taal Engels
This part of ISO 1133 specifies a procedure for the determination of the melt volume-flow rate (MVR) and melt mass-flow rate (MFR) of thermoplastic materials that exhibit a high rheological sensitivity to the timetemperature history experienced by the sample during the test and/or to moisture. It is possible that this method will not be appropriate for materials whose rheological behaviour is extremely affected during testing. MFR values can be determined by calculation from MVR measurements provided the melt density at the test temperature and pressure is known, or by measurement using a cutting device provided that the accuracy of the measurement is at least the same as that of the MVR measurement. The primary difference between this part of ISO 1133 and ISO 1133-1 is that this part of ISO 1133 specifies tighter tolerances on the temperature in the cylinder and on the time duration over which the material is subjected to that temperature. Thus the time-temperature history of the material is more tightly controlled and consequently, for materials that are likely to be affected by exposure to elevated temperatures, the variability of test results is reduced compared with whether the specifications of ISO 1133-1 were used. This part of ISO 1133 also provides information for preparation and handling of moisture sensitive materials that again are critical to obtaining repeatable, reproducible and accurate data. The test conditions for measurement of the MVR and MFR are often specified in the material standard. However, for those materials where there are no test conditions specified in the material standard, it is necessary for the test conditions to be agreed between the interested parties.

Details

ICS-code 83.080.20
Nederlandse titel Kunststoffen - Bepaling van de smeltindex op basis van volume (MVR) en de smeltindex op basis van massa (MFR) van thermoplastische materialen - Methode voor materiaalgevoeligheid voor de geschiedenis van tijd-temperatuur en/of vocht
Engelse titel Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics - Part 2: Method for materials sensitive to time-temperature history and/or moisture
Vervangt

Winkelwagen

Subtotaal:

Ga naar winkelwagen