GB/T 25278-2010 (English Version) PDF

Standard No.: GB/T 25278-2010
Language: Chinese, Available in English version
Release Date: 2010
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 25278-2010

Scope: This standard specifies the method for determining the fluidity of melts under shear stress under the shear rate and temperature conditions of plastic processing technology. Since the fluidity of plastic melts depends not only on temperature but also on other parameters, especially shear stress and shear rate, it is necessary to establish this method. This standard applies to the determination of the melt viscosity in the range of 10Pa•s～10⁷Pa•s, which depends on the measurement range of the pressure and (or) force sensor and the mechanical and physical properties of the rheometer. The shear rate produced by the rheometer ranges from 1/s^ˉ1 to 10^{>6/s. The stretching effect at the die entrance causes extrusion swell at the die exit, and this standard also includes methods for assessing extrusion swell. The rheological testing techniques covered in this standard are not limited to the characterization of wall-adhering thermoplastics, but can also be applied to the characterization of thermoset plastics. This standard is not applicable to the determination of shear rate and shear viscosity of non-wall-adhered materials, but it can be used to express the rheological behavior of the entire fluid in a flow channel with a certain geometric shape.}

GB/T 25278-2010 Referenced Document

GB/T 3505-2009 Geometrical Product Specifications(GPS).Surface texture:Profile method.Terms,definitions and surface texture parameters
GB/T 3682-2000 Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics
GB/T 4340.1-2009 Metallic materials.Vickers hardness test.Part 1:Test method
GB/T 6379.2-2004 Accuracy(trueness and precision)of measurement methods and results-Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 11403-2:2004 Plastics - Acquisition and presentation of comparable multipoint data - Part 2: Thermal and processing properties

2010 GB/T 25278-2010 Plastics.Determination of the fluidity of plastics using capillary and slit-die rheometers