Melt flow test equipment for sale with extended warranty. Procedure b is an automatically timed flow rate measurement used for materials having flows from. The melt flow rate apparatus has been designed in accordance with iso 13 and astm d1238. Leading uk supplier full support and calibration services. The value of melt flow index testing polymer solutions. The melt flow index is a measure of the ease of flow of the melt of a thermoplastic polymer. The value obtained through the melt flow index test is a single data point. Melt flow rate measures the rate of extrusion of thermoplastics through an orifice at a prescribed temperature and load. The melt flow index mfi is the measure of how many grams of polymer pass through a standardized capillary under a standard load over 10 minutes. Weigh the extrudate and multiply by the appropriate factor to obtain the standard gms10 minute melt flow value. The operating procedure is simple to undertake using its onboard advanced microprocessor technology. Influence of polymer melting point and melt flow index on. Provision is made for calculation of melt volumeflow rate as well as melt massflow rate.
The sample can be in the form of virgin resin pellets or ground material from a finished thermoplastic product. Standard test method for melt flow rates of thermoplastics. A procedure which could unify a number of these variables and yet provide an adequate estimate of the flow behaviour during processing, i s undoubtedly. Melt flow index mfi measuring instruments and test equipment. Some products such as plastic pendulum impact test machine total of 16 styels, melt flow indexer total of 18 styles, high temperature oilfree hdt and vicat testing machine and other products. It is generally used as an alternative to procedure b on samples having melt flow rates greater than 75 g10 min. The afrt automatically allows the flow rate to be measured and. Because of the difficulty in the online measurement of mfi, a large number of mfi estimation and correlation methods have been proposed. Polymer processors usually correlate the value of mfi with the. Melt flow rate mfr, also known as melt flow index mfi or melt index mi the melt flow rate mfr, originally called melt flow index or melt index, is a measure of the ease of flow of the melt of a thermoplastic polymer.
Melt flow index is an assessment of average molecular mass and is an inverse measure of the melt viscosity. Normally, the test conditions for measurement of melt flow rate are specified in the material standard with a reference to this part of iso 13. 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. Repeat the entire procedure 3 times and average the results. Iso 131991 determination of the meltmass flow rate. Melt flow index mfi is defined as the measure of the ease of melt flow of thermoplastic material in gram over the course of 10 min at a certain standard temperature ie, 230c. Astm d1238 standard test method for melt flow rates of. Melt flow index, melt flow rate, astm d1238, iso 13. Melt flow indexer qualifi 6000 series astm d1238, iso 13. Instron manufactures tensile, compression, fatigue, impact, rheology, and structural testing machines, testing a variety of materials and range of applications. Depending upon the resulting flow rate, a slightly shorter 30 second or longer cut 2 minute may be substituted for the normal 1 minute cut. Astm d1238 standard test method for melt flow rates of thermoplastics by extrusion plastometer.
Consequently, flow properties are important product characteristics that affect not only processability but physical properties as well. Pdf standard test method for melt flow rates of thermoplastics. Amls range of melt flow index mfi measuring instruments and test equipment. Oct 20, 2015 the melt flow index is a measure of the ease of flow of the melt of a thermoplastic polymer. Investigation of melt flow index and impact strength of. Measuring mass flow rate mfr and other polymer properties. It is found that the mfi and impact strength of rotomoulded product increases as the foam percentage increases up to 6%. This value is also commonly called the melt index, mi, or meltflow index, mfi. 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.
The mfr test quantifies the mass of thermoplastic resin that is extruded by an extrusion plastometer over a fixed time period specified as the mass in grams that would be extruded in 10 minutes under prescribed temperature and mechanical load conditions. Melt flow rates of thermoplastics by extrusion plastometer1. Weigh the extrudate and multiply by the appropriate factor to obtain the standard gms10 minute meltflow value. Rotational moulding is one of the fastest growing polymer processes when. The mp1200 is a superior, advanced, melt indexing system that is available in either manual or motorized configurations and features a new three zone band heater with three controllers that result in. The instron ceast mf50 multiweight melt flow tester performs melt flow rate melt index tests according to mfr and mvr. To familiarize the student with the operation of an extrusion plastometer, and demonstrate the relationship between the melt flow index mfi and molar mass. Procedure c is an automatically timed measurement used to determine the melt flow rate mfr of polyolefin materials. Melt flow rate mfr is a value obtained when a product is tested on an extrusion plastometer. Both melt flow and rheology tests can be very helpful tools for qc monitoring and development of polymers. In polyolefin processes the melt flow index mfi is the most important control variable indicating product quality.
It is defined as the mass of polymer, in grams, flowing in ten minutes through a capillary of a. A number in parentheses indicates the year of last reapproval. The operating procedure is simple to undertake using its onboard advanced microprocessor. The melt flow index mfi, also known as the melt flow rate mfr, determines the melt flow properties measured in g10 min of a material at a specific shear stress related to applied load and temperature. Both offer a manual means procedure a or method a and automatic timedflow measurement. Astm d1238 04 standard test method for melt flow rates of. Melt flow system advanced the 6mpca is the most advanced model offered within the rayran range of melt flow indexers. The tester conforms to all national and international melt flow resistance standards, including bs en iso 13 and astm d1238. The melt flow indexer is an affordable tabletop instrument that tests the melt flow resistance mfr of a wide range of thermoplastics. A number in parentheses indicates the year of last. Note 2this test method and iso 131991 are technically equivalent. Standard test method for melt flow rates of thermoplastics by extrusion. It is designed to make melt flow rate testing faster, more accurate and flexible, and generate more rheological information. The extrusion plastometer is a simple form of capillary rheometer, which is commonly used to compare different grades of the.
The volume is converted to a mass measurement by multiplying the result by the melt density value for the material see note 2. Procedure b requires that the melt density either be known or calculated using the calculate option in the embedded software. Procedure b is generally used with materials having melt flow rates from 0. In this work, mechanical predicting methods such as partial least squares pls method and support vector regression svr method are. Astm d1238 04 standard test method for melt flow rates. The instrument and traditional procedure for mfr determination are defined in the iso 13. Use of melt flow rate test in reliability study of. Iso standard 131 governs the procedure for measurement of the melt flow rate. Standard test method for flow rates for polyvinyl chloride with molecular structural implications1 this standard is issued under the. Melt flow index ema 4161c physical properties of polymers melt flow index laboratory purpose. Standard test method for melt flow rates of thermoplastics by extrusion plastometer1 this standard is issued under the. It is often used in the plastic industry for quality control of thermoplastics. The melt flow index obtaining accurate and relevant results.
The method is described in the standards astm d1238 and iso 13. The only flow parameter available to the processor is the melt flow index of the material. Rheograms for engineering thermoplastics from melt flow index. Oct 15, 2010 in polyolefin processes the melt flow index mfi is the most important control variable indicating product quality. Aug 23, 2011 the mfi test is used widely among the various segments of the plastics industry. 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. Mfi melt flow index measuring instruments and test equipment.
Pdf determining the melt flow index of polypropylene. Determination of the melt flow index of plasticized polymer material by using plastometer mflow zwick. Meltflowindex ema 4161c physical properties of polymers. The melt flow index mfi is a measure of the ease of flow of the melt of a thermoplastic polymer. Ceast melt flow testers range from systems that perform a simple manual test procedure to semiautomated testing systems performing multiple weight tests. The mfi is a determination of the flow ability of thermoplastic materials. The test measures the melt flow properties of resins in g10 min at a particular shear stress related to applied load and temperature. The melt flow index mfi, also known as the melt flow rate mfr, of a resin is a materials property test used in the plastics industry. D 1238 04 standard test method for melt flow rates of thermoplastics by extrusion plastometer1 this standard is issued under the. The melting property of thermoplastic material can be checked by equipment called a melt flow tester fig.
More than just a quality control rheological parameter. Samples of 510 mg were always subjected to the following testing procedure. The mass of resin, in grams, that is extruded in 10 minutes equals the mfr, expressed in units of g10 min. Astm d1238 standard test method for melt flow rates. Determination of the melt flow index of plasticized polymer material by using plastometer mflow zwickroell. Astmd1238 standard test method for melt flow rates of. The dynisco polymer test systems series 4000 melt flow indexer incorporates the latest in microelectronic technology. Tutorial on using instron melt flow tester to iso 13 and astm d1238 duration. The instron melt flow testers are specifically designed for easy and accurate measuring of the melt massflow rate mfr and the melt volumeflow rate mvr. Influence of polymer melting point and melt flow index on the performance of ethylenevinylacetate modified bitumen for reducedtemperature application. Melt flow rates of thermoplastics by extrusion plastometer1 this standard is issued under the. The melt flow index mfi or melt flow rate mfr is a measure for the ease of flow of melted plastics. Some instruments can also calculate the shear rate, shear stress, and viscosity in. The test procedure is similar to procedure b, but prescribed conditions of.
Details of the software products used to create this pdf file can be found in the. Use of melt flow rate test in reliability study of thermoplastic encapsulation. Melt flow index is a measure of the resistance to flow viscosity of the polymer melt at a. Melt flow index tester mfi tester manufacturers, exporters and suppliers. The melt flow index only tests the material at one shear stress, and temperature.
Automatic melt cutting and barell cleaning accessories are. Compacting and purging functions can be supported by the unique load cell feature. It provides a means of measuring flow of a melted material which can be used to differentiate grades as with polyethylene, or. Some instruments can also calculate the shear rate, shear stress, and viscosity in centipoise. This presentation is designed to be an informative introduction and guide to melt flow test, and to assist with troubleshooting inconsistencies in results. Note 4older plastometers that were manufactured in accordance.
Mfr and the melt volume flow rate mvr of thermoplastics3 3. Information and translations of melt flow index in the most comprehensive dictionary definitions resource on the web. Sales, quality and technology is absolutely leading position in china. In the present work, a method has been proposed to estimate the rheograms of a melt at temperatures relevant to its processing conditions with the use of a master curve, knowing the melt flow index and glass transition temperature of the material. A useful measure of the shear stressshear rate relationship can be made by measuring the samples mfrmvr at the standard and at the higher load. This value is also commonly called the melt index, mi, or melt flow index, mfi. It is defined as the mass of polymer, in grams, flowing in ten minutes through a capillary of a specific diameter and length by a pressure applied via prescribed alternative gravimetric weights for alternative prescribed temperatures. Polyox watersoluble resins melt flow test procedure. The afrt automatically allows the flow rate to be measured and is suitable for flow rates between 0. The melt flow rate mfr, originally called melt flow index or melt index, is a measure of the ease of flow of the melt of a thermoplastic polymer.