1、Designation:D151112Standard Test Method forCarbon BlackPellet Size Distribution1This standard is issued under the fixed designation D1511;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 parenthes
2、es indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of the pelletsize distribution of carbon black.1.2 The values stated in SI units are to be regarded as thestandard.T
3、he values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety 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
4、 regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1799 Practice for Carbon BlackSampling PackagedShipmentsD1900 Practice for Carbon BlackSampling Bulk Ship-mentsD4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black Manufacturing
5、IndustriesD5817 Practice for Carbon Black,PelletedReduction,Blending,and Drying of Gross Samples for TestingE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Summary of Test Method3.1 A sample of carbon black is shaken in a sieve shaker toseparate the pellets by size with specified s
6、eries of sievescreens arranged with progressively smaller openings.Thepercentage,by mass,of carbon black retained on each sieve isweighed to calculate the pellet size distribution.4.Significance and Use4.1 The variation in the size of the pellets may relate to thelevel of dispersion and to the ease
7、of handling.Due to the manyother variables that influence dispersion and handling,thesignificance of pellet size must be determined by the user.5.Apparatus5.1 Riffle Sample Splitter as specified in Practice D5817.5.2 Balance with a sensitivity of 0.1 g.5.3 SievesU.S.Standard Sieves or equivalent,con
8、formingto Specification E11.Sieve Nos.10,18,35,60,and 120,having openings respectively of 2000,1000,500,250,and 125m,shall be used.The sieves shall be 25 mm(1 in.)in heightand 200 mm(8 in.)in diameter.5.4 Bottom receiver pan and top sieve cover.5.5 Sieve ShakerAny equipment that will vibrate or shak
9、ea stack of sieves in a manner that will allow the pellets toseparate into size fractions without excessive pellet breakage.The following three types of shakers have been found satis-factory for determining the pellet size distribution of pelletedcarbon black.5.5.1 Mechanical Sieve Shaker3The Mechan
10、ical SieveShaker shall impart a uniform rotary and tapping motion to astack of sieves as described in 5.3.The shaker machine shall bepowered with an electric motor producing constant oscillationto the sieve stack providing 280 to 320 rotary motions/min and140 to 160 taps per minute.The cover plate s
11、hall be fitted witha cork stopper that shall extend 3 to 9 mm(18to38in.)abovethe metal recess.Materials other than cork,such as rubber orwood,are unacceptable.The amplitude of the hammer shall beset at 3.30 6 0.15 cm(15166116in.).1This test method is under the jurisdiction of ASTM Committee D24 on C
12、arbonBlack and is the direct responsibility of Subcommittee D24.51 on Carbon BlackPellet Properties.Current edition approved June 1,2012.Published August 2012.Originallyapproved in 1957.Last previous edition approved in 2010 as D1511 10.DOI:10.1520/D1511-12.2For referenced ASTM standards,visit the A
13、STM 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.3The following devices have been found suitable:the Ro-Tap Siever and the AS200 tap.The sole sources of supp
14、ly known to the committee at this time are,respectively,WS Tyler,8570 Tyler Blvd.,Mentor,OH 44060,E-mail:,and Retsch Inc.,74 Walker Lane,Newton,PA18940,E-mail:.If you are aware of alternative suppliers,please provide thisinformation to ASTM International Headquarters.Your comments will receivecarefu
15、l consideration at a meeting of the responsible technical committee,1whichyou may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.5.2 Vibratory Siever4The Retsch Sieve Shaker AS200has variable timer and amplitude settings.When se
16、t at 3 minand 0.5 amplitude,the AS200 provides satisfactory results.Itaccommodates a stack of sieves as described in 5.3.5.5.3 Automatic Sieve Shaker5The Gradex 2000 automati-cally performs all of the required steps including the weighingof the sample and the individual fractions retained on eachsieve.The equipment consists of a balance,autofeed system,electric motor that imparts a uniform rotary motion,pneumati-cally operated rods to provide the tapping action,and computerand software to record
