The method is described in the standards astm d1238 and iso 13. Melt flow index is an assessment of average molecular mass and is an inverse measure of the melt viscosity. This manual in no way supersedes either of these documents. The essential elements of an extrusion plastometer, together with the accuracy requirements and test methodology, are specified in national and international standards. Astm test method unit value typical resin properties for e924. Melt flow indexer qualifi 6000 series astm d1238, iso 13. The standard includes four different test procedures, with procedures a and b common with iso 13. For annual book of astm standards volume information, refer to the standards document summary page on the astm website. Astm d123810 standard test method for melt flow rates. The melt density is a multiplier that converts volume back into a mass value. This test method covers the determination of the rate of extrusion of molten thermoplastic resins using an extrusion plastometer. Evaluation of polypropylene drainage pipe manufacturers.
Aug 27, 2018 qc652s melt flow index astm d1238, astm d3364, iso 13. Pertaining to materials typically used in geosynthetics, this test follows astm d1238 or iso 013. 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. All bsi british standards available online in electronic and print formats. This presentation is designed to be an informative introduction and guide to melt flow test, and to assist with. Astm d123810 standard test method for melt flow rates of thermoplastics by extrusion plastometer.
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. Astmd1238 pp and pe melt flow testing machines product description. Astmd1238 pp and pe melt flow testing machine is based on designed and manufactured according to latest. The melt flow index test is regularly used in the geosynthetics industry to measure the molecular weight of a polymer indirectly. Provision is made for calculation of melt volumeflow rate as well as melt massflow rate.
Qualifi 6000 melt flow indexer series can be used for testing mfr and mvr of polycarbonate, fluoroplastics, as well as. Extrusion rate of a resin through an orifice of defined dimensions at a specified temperature and load. Injection molding fractional melt index, high density polyethylene materials laren d. Iso 13 and astm d1238 have more similarities than differences. 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. The mp1200 is a superior, advanced, melt indexing system that is available in either manual or motorized configurations. Request pdf understanding melt index and astm d1238 in plastics manufacturing, the melt flow index mfi is used as a routine indicator of rheological. Basic extrusion plastometer for determining the melt flow. Procedure b requires the use of a meltdensity value, which is the density of the material when it is in its molten state. 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. The method is described in the similar standards astm d1238 and iso 13. Astm d1238 offers a variation of the melt flow test known as a multiweight melt flow test. Astm d1238 standard test method for melt flow rates.
Mar 06, 2019 methods a, b and c, astm d1238 astm d3364 jis k 7210. Melt flow index, melt flow rate, astm d1238, iso 13. Astm d1238, standard test method for melt flow rates of thermoplastics by extrusion plastometer, astm international, west conshohocken, pa, 20. The melt density is a multiplier that converts volume. Understanding melt index and astm d1238 astm international. It is generally used as an alternative to procedure b on samples having melt flow rates greater than 75 g10 min. 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. The iso 13 standard does not detail this alternative method. The mflow is ideally suited for mfr mvr tests according to iso 13 astm d 1238. Manufacturers consider these standards technically equivalent, as both detail similar standards for using an extrusion plastometer, which is commonly known as a melt indexer. After a specified preheating time, resin is extruded. Both melt flow and rheology tests can be very helpful tools for qc monitoring and development of polymers. Astm d1238, standard test method for melt flow rates of thermoplastics by extrusion plastometer, astm international, west conshohocken.
Astm d3364 992019 standard test method for flow rates. We buy materials, set conditions and sell our products all based on this number, which has been around for over 50 years. Astm d1238 prescribes four test procedures to measure the fluidity of plastics in the melt flow index with. 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. Note 1roundrobin testing indicates this test method may be suitable at flow rates up to 1500 g10 min if the timing clock resolves the elapsed time to the nearest 0. Standard test method for melt flow rates of thermoplastics by extrusion. Astm d1238 standard test method for melt flow rates of thermoplastics by extrusion plastometer.
Melt flow indexer manual and motorized mp1200 from tinius olsen. Qc652s melt flow index astm d1238, astm d3364, iso 13. Astm international astm d123800 standard test method for. Iso 13 now supersedes all european standards such as din 53735 germany, nf. Aug 10, 2001 astm d1238 01e1 standard test method for melt flow rates of thermoplastics by extrusion plastometer august 10, 2001 astm international 1. The tests performed are those described by astm d1238 and iso 131, 13 2. 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. Part i article pdf available in advances in polymer technology 61.
It is often used in the plastic industry for quality control of thermoplastics. Iso, din, astm, gm etc may exist which give further constraints on how a particular type of material may be run. 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. Melt flow index tester complied with astm d1238 standard test method. Astmd1238 is commonly used to perform this operation the melt flow index mfi is a measure of the flowability of the resin under controlled conditions and can be easily measured with. The mflow can be operated stand alone via a modern touch display as well. Astmd1238 is commonly used to perform this operation the melt flow index mfi is a measure of the flowability of the resin under controlled conditions and can be easily measured with equipment called plastometer, using very low strain rates, a temperature of 230 c and weighing 2. Melt flow rates of thermoplastics by extrusion plastometer1. Fundamentals of melt flow testing linkedin slideshare. Procedure c is an automatically timed measurement used to determine the melt flow rate mfr of polyolefin materials. Injection molding fractional melt index, high density. Astm d1238 ab testing using polypropylene duration. The meltflow test detailed in the astm d1238 and iso 13 standards quickly measures one point on the viscosity curve under standard conditions.
A number in parentheses indicates the year of last reapproval. Determining the melt index of thermoplastics to iso 13 and astm d1238 the essential elements of an extrusion plastometer, together with the accuracy requirements and test methodology, are specified in national and international standards. In plastics manufacturing, the melt flow index mfi is used as a routine indicator of rheological behavior when more expensive. This standard is issued under the fixed designation d1238. Measuring mass flow rate mfr and other polymer properties. Astm d792 one test per lot melt index base polypropylene resin astm d1238 one test per lot density virgin polypropylene compound astm d1505 or astm d792 one test per quarter melt.
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. Purchase your copy of astm d1238 as a pdf download or hard copy directly from the official bsi shop. Flow rates can be used to differentiate grades or provide a measure of degradation of a material as a result of molding. Melt flow rates of thermoplastics by extrusion plastometer1 this standard is issued under the. 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 for melt flow rates of thermoplastics used in. Shoup, chevron phillips chemical company lp abstract when injection molding high. Procedure b is generally used with materials having melt flow rates from 0. Last previous edition approved in 2001 as d 1238 01e1. D1238 test method for melt flow rates of thermoplastics by extrusion plastometer. Melt flow rate measures the rate of extrusion of thermoplastics through an orifice at a.
Prestos melt flow index tester evaluated the flow properties of the molten plastics or resins and defined as the. Norma iso 13 i astmd1238 rolbatch dr laabs magdalena. The tester conforms to all national and international melt flow resistance standards, including bs en iso 13 and astm d1238. Both standards present tests that measure one point on the viscosity curve under controlled. The precision and accuracy of the test has been determined by astm method d1238. More than just a quality control rheological parameter. Procedure b is generally used with materials having melt. The melt flow rate apparatus has been designed in accordance with iso 13 and astm d1238. The melt flow index mfi or melt flow rate mfr is a measure for the ease of flow of melted plastics. It provides a means of measuring flow of a melted material which can be used to differentiate grades as with polyethylene, or.
This procedure which uses different weights of materials offers multiple measurements on a single charge, including measurements under varying load conditions. Melt flow rate measures the rate of extrusion of thermoplastics through an orifice at a prescribed temperature and load. 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. Shoup, chevron phillips chemical company lp abstract when injection molding high density polyethylene hdpe, typical melt index of the product used ranges from about 2. Astm d1238 meltflow rates of thermoplastics by extrusion plastometer. Understanding melt index and astm d1238 request pdf. It is generally used as an alternative to procedure b on samples. 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.
Last previous edition approved in 2004 as d1238 04c. Astm d1238, table 4 lists generic melt density factors for virgin pp and pe. The melt flow rate apparatus has been designed in accordance with iso 13 and astm d1238 method b requires the displacement transducer, afrt. Tinius olsen is happy to launch the newest addition to its polymer testing line, the mp1200 melt flow testerextrusion plastometer. Melt index this test method is used to determine the melt mass flow rate and melt volume flow rate of polymers. Astmd1238 standard test method for melt flow rates of. The melt flow test detailed in the astm d1238 and iso 13 standards quickly measures one point on the viscosity curve under standard conditions. 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. Astmd1238 standard test method for melt flow rates of thermoplastics by extrusion plastometer melt flow rate. Documents sold on the ansi webstore are in electronic adobe acrobat pdf.
Astm d1238 meltflow rates of thermoplastics by extrusion. Melt flow rate is an indirect measure of molecular weight, with high melt flow rate corresponding to low molecular. Determination of melt mass flow rate mfr and melt volume. While the relative simplicity of this test has remained the same, melt indexers have evolved considerably since they appeared in the 1950s. Melt flow rate testingpart 1 though often criticized, mfr is a very good gauge of the relative average molecular weight of the polymer. Last previous edition approved in 2010 as d1238 10. Astm d1238 standard test method for melt flow rates of. It is often used in the plastic industry for quality control of. The polymer is heated in a small oven and a normal load is applied to the molten material. Standard test method for melt flow rates of thermoplastics by. Pdf standard test method for melt flow rates of thermoplastics. Iso 13 melt massflow rate and melt volumeflow rate.
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