ASTM D The Bulk Density Tester series testers are used to measure apparent density, bulk factor, and. RAW MAteRiAL evALUAtion. ASTM D METHOD A. Primarily used to measure the apparent density of fine granules that can be poured readily through a “v”. ASTM D , ISO R Food Testing, Other Applications Testing, Plastic Testing . Plastics and Resins. Density and Specific Gravity. A bulk density tester does.
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Published on Oct View Download D 96 Reapproved 1Standard Test Methods forApparent Density, Bulk Factor, and Pourability of PlasticMaterials1This standard is issued under the fixed designation D; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates asttm year of last reapproval.
Asuperscript epsilon asmt an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. Different proce-dures are given for application to the various forms of thesematerials that are commonly encountered, from fine powdersand granules to large flakes and cut fibers. The values in parentheses are for information only. It is theresponsibility of the user of this standard to establish appro-priate safety f1895 health practices and determine the applica-bility of regulatory limitations prior to use.
The bulkfactor is f1895 equal to the ratio of the density after molding orforming to the apparent density of the material as received. It is a measure of the readinesswith which such materials will flow through hoppers and feedtubes and deliver uniform weights of material.
LABULK 307 Plastics Moulding Materials Apparent Density Tester︱Funnel︱ASTM D1895 A
Current edition approved Jan. Last previous edition approved in as D 96 This edition includes the addition of an extensive ISO equivalency statement andkeywords section. No further reproductions authorized. Open thebottom of the funnel quickly and allow the material to flowfreely into the cup. If caking occurs in the funnel, the materialmay be loosened with a small glass rod.
Weigh the material in thecup to the nearest 0. Calculate the weight in grams of 1 cm3of the material. NOTE 2To convert grams per cubic centimetre to ounces per cubicinch, multiply by 0. To convert to grams per cubic inch multiply by To convert grams per cubic centimetre to pounds per cubic foot,multiply by NOTE 3Apparent density figures are not comparable except onmaterials having the same specific gravity after molding or forming.
NOTE 4Finely divided powders may collect electrostatic chargeswhich, if present at the time of measurement, may result in variableapparent density values. Carbon black is a material that may be premixedwith the sample at concentrations of 0. While these powders usuallywill pour through this funnel, they may bridge in the cm3 cup shownin Fig.
To avoid this, the cm3 cup shown in Fig. Make three determinations of theapparent density on each sample and average the results Note2. Such materials cannot bepoured through the funnels described in Test Methods A and B. Also, since they ordinarily are very bulky when loosely pouredand since they usually are compressible to a lesser bulk, evenby hand, a measure of their density under a small load isappropriate and useful.
Theplunger shall have a scale cut on the outside surface, graduatedin intervals of 1 mm. Loosely drop 60 6 0. Before applying the weight, levelthe material in the measuring cylinder. Measure the height ofthe loose material in centimetres and identify this measurementas H1. Lower this weight gradually into the measuring cylinder untilit is entirely supported by the material. Allow the weight tosettle for 1 min and asttm the reading from the scale to thenearest 0. This reading will give directly in centimetresthe height, H2, of the material.
Each of the materials dd1895 commercial materials d185 weredistributed to the testing laboratories on an as received bias. Each test result was based on three individual determinations,and was obtained either by Test Method A or B, dependentupon equipment availability in the individual laboratory. TestMethod C was not evaluated. Insufficient data were collectedfor the evaluation of bulk factor and pourability because of theinherent properties of the tested materials, and limitations d895 equipment available to the laboratories involved in theinterlaboratory test.
NOTE 6Specific materials are: When the latter method is used, the averagespecific gravity, in general, shall be assumed to be numericallyequal to the average density in grams per cubic centimetre. Ifthe shape of the formed specimen is such that its volume maybe readily and accurately calculated from its v1895, thedensity may be determined by dividing the weight of thespecimen by its volume. NOTE 7Because bulk factor is a dimensionless ratio, it permitsranking of plastic materials, with respect to volume change upon fabrica-tion, regardless of their molded or formed density or specific gravity.
These shall beclearly identified. Test Method C does notpermit measurement of pourability.
Work this sample on a paper until dd1895 is notendency for the material to pack or cake. With the apparatusassembled as shown in Fig. Thenquickly open the bottom of the funnel and start the stopwatchor timer at the same instant. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.
Bulk Density ASTM D B
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.
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Your comments will receive careful consideration at a meeting of theresponsible d18895 committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.
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