ASTM_D_6148_-_97_2002.pdf

Designation:D 6148 97(Reapproved 2002)An American National StandardStandard Practice forthe Separation and Examination of Stickies1This standard is issued under the fixed designation D 6148;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 the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice is applicable to a wide range of virginpulps or pulps derived from recovered materials or recoveredpaper of the type typically used to produce paper,paperboardand other paper products.1.2 This practice describes laboratory procedures wherebystickies are typically separated from pulp fibers,and then theseparated stickies fraction is examined by qualitative or quan-titative procedures,or both.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 regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:D 585 Practice for Sampling and Accepting a Single Lot ofPaper,Paperboard,Fiberboard,and Related Product2D 1968 Terminology Relating to Paper and Paper Products2D 2019 Test Method for Dirt in Paper and Paperboard2E 122 Practice for Calculating Sample Size to Estimate,With a Specified Tolerable Error,the Average for Charac-teristic of a Lot or Process32.2TAPPI Documents4T 205 Forming Handsheets for Physical Testing of PulpT 210 Sampling and Testing Wood Pulp Shipments forMoistureT 412 Moisture in Pulp,Paper and PaperboardUM 242 Shive Content in Mechanical Pulp(SomervilleFractionator)3.Terminology3.1 Definitions:3.1.1 Definitions used in this practice are those found inTerminology D 1968 or the Dictionary of Paper.43.2 Definitions of Terms Specific to This Standard:3.2.1 stickies,nparticulate,generally non-fibrous,con-taminants suspended in pulps of the type used in papermakingwhich adhere to themselves,other components of the paperstructure,components of the papermaking machinery,and inthe case where the contaminants are incorporated into finishedpaper or paper products,cause the unexpected and generallyundesirable adherence one to another of units of the finishedpaper or paper product.3.2.1.1 DiscussionThe suspended particulate contami-nants are usually of low specific gravity and include,but arenot limited to,residual materials such as adhesives and coatingresidues,films,tapes,rubber-like particles,inks,and hydroly-sis products of synthetic sizing materials.4.Summary of Practice4.1 Aslurry of pulp fibers,after mechanical disintegration ifnecessary,is placed in a separatory device in contact with aplate or screen of defined area having openings of specifiednumber and size.4.1.1 The characteristics of the plate or screen shall be suchthat the stickies contaminants are separated from papermakingfibers at an efficiency required to differentiate and discriminatebetween test materials that are known to contain differentlevels of stickies,or that have been found to exhibit differentperformance in the papermaking process due to the levels ofstickies incorporated within them.4.1.2 In some separatory devices,the slurry is recirculatedin contact with the plate or screen within the separator deviceto achieve stickies separation.In other devices,stickies remain-ing on the plate or screen are washed free from the plate orscreen with a supply of fresh water,or mechanically removedwith tweezers or a similar device.Sometimes both proceduresoccur.4.1.3 The typical plate or screen used for stickies separationin this practice contains slots having a width of 0.15 mm(0.006in.),however slotted plates or screens having a different widthopening,for example 0.10 mm(0.004 in.)or 0.20 mm(0.008in.),have been successfully used in specific applications.1This practice is under the jurisdiction of ASTM Committee D06 on Paper andPaper Products and is the direct responsibility of Subcommittee D06.92 on TestMethods.Current edition approved July 10,1997.Published February 1998.2Annual Book of ASTM Standards,Vol 15.09.3Annual Book of ASTM Standards,Vol 14.02.4Available from the Technical Association of the Pulp and Paper Industry,Technology Park,P.O.Box 105113,Atlanta,GA 30348.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.4.2 The quantity,qualitative characteristics,or both,of theseparated stickies may be determined by any of the followinginstruments or approaches,singly or in combination,based onthe measurement information required:4.2.1 Touch or visual inspection using tweezers,dissectingneedles,size estimation gages,or similar devices(size,color,presence or absence of stickiness),4.2.2 Automated image analysis(number and size of par-ticles),4.2.3 Reaction to heat(thermal pro