1、Designation:D12708(Reapproved 2015)Technical Association of Pulp and Paper IndustryTentative Method T 634ts-64Designation:133/79(87)Standard Test Method forDrop Melting Point of Petroleum Wax,Including Petrolatum1This standard is issued under the fixed designation D127;the number immediately followi
2、ng the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for u
3、se by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers the determination of the dropmelting point of petroleum wax.It is used primarily forpetrolatums and other microcrystalline wax.NOTE1Additional methods used for petroleum waxes are TestMethod D87 and Test Method D938.R
4、esults obtained may differ,depending on the method used.For pharmaceutical petrolatum,TestMethod D127 usually is used.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesa
5、fety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D87 Test Method for Melting Point
6、of Petroleum Wax(Cooling Curve)D938 Test Method for Congealing Point of PetroleumWaxes,Including PetrolatumE1 Specification for ASTM Liquid-in-Glass Thermometers3.Terminology3.1 Definitions:3.1.1 drop melting point of petroleum waxthe temperatureat which material becomes sufficiently fluid to drop f
7、rom thethermometer used in making the determination under definiteprescribed conditions.4.Summary of Test Method4.1 Specimens are deposited on two thermometer bulbs bydipping chilled thermometers into the sample.The thermom-eters bearing the specimens are placed in test tubes and heatedby means of a
8、 water bath until the specimens melt and the firstdrop falls from each thermometer bulb.The average of thetemperatures at which these drops fall is the drop melting pointof the sample.5.Significance and Use5.1 Melting point is a wax property that is of interest to mostwax consumers.It can be an indi
9、cation of the performanceproperties of the wax.Drop melting point,Test Method D127,is often used to measure the melting characteristics of petro-latums and other high viscosity petroleum waxes.6.Apparatus6.1 Test TubesStandard test tubes,25-mm(1-in.)in out-side diameter and 150-mm(6-in.)long.The tes
10、t tubes shallutilize stoppers,such as corks,grooved at the sides to permitair circulation and bored in the center to receive the thermom-eter.6.2 BathA transparent container of not less than 1500-mLcapacity,that will permit the immersion of the test tubes to adepth of at least 90 mm and still leave
11、a depth of approximately15 mm of water below the bottoms of the test tubes.6.3 Thermometer,having a range as shown below andconforming to the requirements as prescribed in SpecificationE1 or in specifications for IP Standard Thermometers:Thermometer NumberThermometer RangeASTMIP32 to 127C61C63C90 to
12、 260F61F.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.10.0A on Physical/Chemical Properties.Current edition approved Jan.1,2015.Published February 2015.Originallyapproved in 1922
13、.Last previous edition approved in 2008 as D127 08.This test method is sponsored jointly by the Technical Association of Pulp andPaper Industry and ASTM International.This test method was adopted as a jointASTM-IPstandard in 1964.In the IP,thistest method is under the jurisdiction of Standardization
14、 Committee.In 1963,the title,scope,and definition were changed to define the determinationof“drop melting point.”Sections on procedure,report,and precision were revised,and a new section on significance was added.In 1964,minor editorial changes and additions to this method were made for itspublicati
15、on as a joint ASTM-IP standard.DOI:10.1520/D0127-08R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright A
16、STM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.4 Bath Thermometer,any suitable type,accurate to 0.5C(1F)throughout the required range.7.Procedure7.1 Secure a sample of sufficient size that is representativeof the material under inspection.Use a fresh portion of thesample for each set of two determinations.Melt the sampleslowly until the temperature reaches at least 11C(20F)abovethe expected drop melting point.Place sufficient sample in aflat
