At the same time, melt flow rate is a measure of the ability of the materials melt to flow under pressure. D 1238 04 standard test method for melt flow rates of thermoplastics by extrusion plastometer1 this standard is issued under the. Tmi has currently has three astm d1238 melt flow indexers as well as older models used for the more common method a which it can provide calibration services for. This requires measurements from several fillings when simple extrusion plastometers are used. Note 2 melt density is the density of the material in it molten state. The 4601 melt flow indexer is an affordable and easytouse tabletop instrument that tests the melt flow resistance mfr of a wide range of thermoplastics. Astm d1238 standard test method for melt flow rates of thermoplastics by extrusion plastometer. Procedure b is generally used with materials having melt flow rates from 0. First of all, melt index or mi, or melt flow index, or mfi is a measure of melt viscosity, but its the inverse of real viscosity that is, a resin with. Aug 10, 2001 astm international astm d1238 01e1 standard test method for melt flow rates of thermoplastics by extrusion plastometer.
It is often used in the plastic industry for quality control of thermoplastics. Tutorial on using instron melt flow tester to iso 13 and astm d1238 duration. The melt flow rate apparatus has been designed in accordance with iso 13 and astm d1238 method b requires the displacement transducer, afrt. Astm d1238, standard test method for melt flow rates of thermoplastics by extrusion plastometer, astm international, west conshohocken, pa, 20, back to top. Astm d1238 offers a variation of the meltflow test known as a multiweight melt flow test. The mass of resin, in grams, that is extruded in 10 minutes equals the mfr, expressed in units of g10 min. Melt flow rate mfr when 20 kg weight used then mfr test is hlmi or high load melt index melt flow index mfi flow rate of pe obtained under 190 c and 2. The melt flow index test is regularly used in the geosynthetics industry to measure the molecular weight of a polymer indirectly.
The thermoplastics materials industry uses the melt flow index mfi as a basic tool for quality control and acceptance of incoming products. This presentation is designed to be an informative introduction and guide to melt flow test, and to assist with troubleshooting inconsistencies in results. This value is also commonly called the melt index, mi, or meltflow index, mfi. Operators in quality control qc departments have experienced the advantage of further automated melt index measurements and the exact determination of mfr melt flow rate as well as mvr melt volume rate according to iso 13. Procedure b isgenerally used with materials having melt flow rates from 0. Melt flow rate is an indirect measure of molecular weight, with high melt flow rate corresponding to low molecular weight. According to iso 13 and astm d1238, the mfi is the weight of polymer melt. Note 2melt density is the density of the material in it molten state. Melt flow indexer the melt flow indexer is an affordable tabletop instrument that tests the melt flow resistance mfr of a wide range of thermoplastics. This presentation is designed to be an informative introduction and guide to melt flow test, and to assist with. Iso 13 melt massflow rate and melt volumeflow rate. This measure of the flow properties is contained into the identity card of polymers and it is used to verify if the plastics grade is within the required fluidity range.
It provides a means of measuring flow of a melted material which can be used to differentiate grades as with polyethylene, or determine the extent of degradation. Astm d1238 standard test method for melt flow rates. Determination of melt mass flow rate mfr and melt volume flow rate mvr iso 131, 2 and astm d1238 extrusion plastometers provide standard values for the melt index mfr and volume index mvr of filled and unfilled thermoplastics to iso 131 and 2, astm d1238. Pertaining to materials typically used in geosynthetics, this test follows astm d1238 or iso 013. Melt flow indexer manual and motorized mp1200 from tinius. Ceast supplies solutions for determination of plastics melt mass flow rate and melt volume flow rate to iso 13. The melt density is a multiplier that converts volume back into a mass value. These factors will change with additives and processing, so it is more accurate to measure the actual melt density of the specific resin being tested. We buy materials, set conditions and sell our products all based on this number, which has been around for over 50 years. Astm d1238, table 4 lists generic meltdensity factors for virgin pp and pe. Mp1200 tinius olsen is proud to introduce our latest evolution of melt indexer to meet almost every need. The mp1200 features the latest in melt flow measurement technology and allows operators to rapidly and easily install and perform melt flow tests, according to iso 131 and 2, astm d1238, and other global and industrial specifications. The melt flow rate is a measure of the ease of flow of melted plastic and represents a typical index for quality control of thermoplastics. Astm d1238, table 4 lists generic melt density factors for virgin pp and pe.
In buying these units from third parties be careful that they are either from a major manufacturer or that the company is accredited to repair them. Request pdf understanding melt index and astm d1238 in plastics manufacturing, the melt flow index mfi is used as a routine indicator of rheological behavior when more expensive and. The new generation of melt flow index measurements by gottfert is represented by the mi40. Melt flow rate measures the rate of extrusion of thermoplastics through an orifice at a prescribed temperature and load. It is generally used as an alternative to procedure b on samples having melt flow rates greater than 75 g10 min. The manually operated test procedure is very simple to undertake. Astm d1238 standard test method for melt flow rates of. More than just a quality control rheological parameter.
Astm international astm d123801e1 standard test method. Astm d1238 density of plastics by the densitygradient technique. Melt mass flow and melt volume flow rate astm d1238 extrusion rate of a resin through an orifice of defined dimensions at a specified temperature and load. Qc652s melt flow index astm d1238, astm d3364, iso 13. The method is described in the standards astm d1238 and iso 13.
Qc652s melt flow index astm d1238, astm d3364, iso 13 cometech. From lab to production, providing a window into the process. Determination of melt mass flow rate mfr and melt volume. D1238 10 standard test method for melt flow rates of thermoplastics by extrusion plastometer1 this standard is issued under the.
Purchase your copy of astm d1238 as a pdf download or hard copy directly from the official bsi shop. Astm d1238 offers a variation of the melt flow test known as a multiweight melt flow test. All bsi british standards available online in electronic and print formats. The volume is converted toa mass measurement by multiplying the result by the meltdensity value for the material see note 2. Astm international astm d123801e1 standard test method for melt flow rates of thermoplastics by extrusion plastometer. Melt flow index is an assessment of average molecular mass and is an inverse measure of the melt viscosity. Qualifi 6000 melt flow indexer series can be used for testing mfr and mvr of polycarbonate, fluoroplastics, as well as polyethylene, polypropylene, abs, pom, etc and is related to the melted material viscosity. The thermoplastics materials industry uses the melt flow index mfi as basic tool for quality control and acceptance of incoming products. Determination of the melt massflow rate mfr and melt volumeflow rate mvr of thermoplastics. Astm d1238 meltflow rates of thermoplastics by extrusion. Aug 27, 2018 qc652s melt flow index astm d1238, astm d3364, iso 13 cometech.
C din 53453 mjmm 2 4 vicat softening temperature astm. Some instruments can also calculate the shear rate, shear stress, and viscosity in. The mp1200 is a superior, advanced, melt indexing system that is. Astm d1238 meltflow rates of thermoplastics by extrusion plastometer. The melt flow index mfi or melt flow rate mfr is a measure for the ease of flow of melted plastics. The iso 13 standard does not detail this alternative method. Astm d1238 standard test method for melt flow rates of thermoplastics by extrusion plastometer melt flow rate. Understanding melt index and astm d1238 request pdf. Some instruments can also calculate the shear rate, shear stress, and viscosity in centipoise. This value is also commonly called the melt index, mi, or melt flow index, mfi. In buying these units from third parties be careful that they are either from a major manufacturer or that the company is.
The method is described in the similar standards astm d1238 and iso 13. Astm d1505 impact resistance of plastic film by the freefalling dart method. Measuring mass flow rate mfr and other polymer properties. Melt massflow and melt volumeflow rate astm d1238 extrusion rate of a resin through an orifice of defined dimensions at a specified temperature and load. Standard test method for melt flow rates of thermoplastics by extrusion plastometer, iso13. This procedure which uses different weights of materials offers multiple measurements on a single charge, including measurements under varying load conditions. Mar 06, 2019 qc 652s melt flow index tester 1 astmd1238. Both measure the same property, but slight procedural and equipment differences can yield different results. Standard test method for melt flow rates of thermoplastics by extrusion plastometer 1. Astmd1238 standard test method for melt flow rates of. This new model, the mp1200, meets, and surpasses, all the requirements of procedure a and procedures b, c and d of astm d1238.
Astm d1238, standard test method for melt flow rates of thermoplastics by extrusion plastometer, astm international, west conshohocken, pa, 20. The measure of the flow properties is contained on the identity card, and is used as a check to verify if the plastics grade is within the required fluidity range. With many polyolefins it is common to state the mvr value for different load levels and determine the flow rate ratio frr. Norma iso 13 i astmd1238 rolbatch dr laabs magdalena. Both melt flow and rheology tests can be very helpful tools for qc monitoring and development of polymers. Melt flow index, melt flow rate, astm d1238, iso 13. Astmd1238 standard test method for melt flow rates of thermoplastics by extrusion plastometer melt flow rate.
Melt flow indexer qualifi 6000 series astm d1238, iso 13. The tester conforms to all national and international melt flow resistance standards, including bs en iso 13 and astm d1238. The volume is converted to a mass measurement by multiplying the result by the melt density value for the material see note 2. Standard test method for melt flow rates of thermoplastics by. Injection moulding easy flow medium to high mfr moderate temperatures narrow molecular weight distribution rapid cycles 2. Standard test method for melt flow rates of thermoplastics. Flow rates can be used to differentiate grades or provide a measure of degradation of a material as a result of molding. It is not to be confused with the standard density value of the material. Melt flow indexer manual and motorized mp1200 from tinius olsen.
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