ISO 11443-2014 pdf free.Plastics – Determination of the fluidity of plastics using capillary and slit-die rheometers.
ISO 11443 specifies methods for determining the fluidity of plastics melts subjected to shear stresses at rates and temperatures approximating to those arising in plastics processing. Testing plastics melts in accordance with these methods is necessary since the fluidity of plastics melts is generally not dependent solely on temperature, but also on other parameters, in particular shear rate and shear stress.
The methods described in this International Standard are useful for determining melt viscosities from 10 Pa’s to 1O Pas, depending on the measurement range of the pressure and/or force transducer and the mechanical and physical characteristics of the rheorncter. The shear rates occurring in extrusion rheometers range from 1 s-1 to 106 51
Elongational effects at the die entrance cause extrudate swelling at the die exit. Methods for assessing extrudate swelling have also been included.
The rheological techniques described are not limited to the characterization of wall-adhering thermoplastics melts only; for example, thermoplastics exhibiting “slip’ effectsllllZl and thermosetting plastics can be included. However, the methods used for determining the shear rate and shear viscosity are invalid for materials which are not wall-adhering. Nevertheless, this International Standard can be used to characterize the rheological behaviour of such fluids for a given geometry.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1133-1. Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics — Part 1: Standard method
ISO 1133.2, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics — Part 2: Met hod for materials sensitive to time-temperature history and/or moisture
ISO 4287, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 11403-2, Plastics — Acquisition and presentation of com parable multipoint data — Part 2: Thermal and
processing properties
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
Newtonian fluid
fluid for which the viscosity is independent of the shear rate and of time.ISO 11443 pdf download.
Tags: Plastics
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