1、Designation:D146510(Reapproved 2015)Technical Association of Pulp and Paper IndustrySuggested Method T 652Standard Test Method forBlocking and Picking Points of Petroleum Wax1This standard is issued under the fixed designation D1465;the number immediately following the designation indicates the year
2、 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.1.Scope1.1 This test method covers the determination of the block-ing poin
3、t and picking point of petroleum wax.1.2 WARNINGMercury has been designated by manyregulatory agencies as a hazardous material that can causecentral nervous system,kidney and liver damage.Mercury,orits vapor,may be hazardous to health and corrosive tomaterials.Caution should be taken when handling m
4、ercury andmercury containing products.See the applicable product Ma-terial Safety Data Sheet(MSDS)for details and EPAswebsitehttp:/www.epa.gov/mercury/faq.htmfor addi-tional information.Users should be aware that selling mercuryand/or mercury containing products into your state or countrymay be proh
5、ibited by law.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses are provided forinformation only.1.4 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 t
6、o 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 of Petroleum Wax(Cooling Curve)D938 Test Method for Congealing Point of PetroleumWaxes,Including Pe
7、trolatumD2423 Test Method for Surface Wax on Waxed Paper orPaperboardE1 Specification for ASTM Liquid-in-Glass Thermometers3.Terminology3.1 Definitions:3.1.1 wax blocking pointthe lowest temperature at whichfilm disruption occurs across 50%of the waxed paper surfacewhen the test strips are separated
8、.3.1.2 wax picking pointthe temperature at which the firstfilm disruption occurs on the waxed paper when test strips areseparated.4.Summary of Test Method4.1 Paper test specimens are coated with the wax sample,folded with the waxed surfaces together,and placed on ablocking plate.The plate is heated
9、at one end and cooled at theother end to impose a measured temperature gradient along itslength.After a conditioning period on the plate,the specimensare removed,unfolded,and examined.The points of initial filmdisruption(picking point)and where 50%of the specimenwidth is disrupted(50%blocking point)
10、are noted.Thetemperatures of corresponding points on the blocking plate arereported as the picking point and blocking point or blockingrange.5.Significance and Use5.1 Blocking of waxed paper,because of the relatively lowtemperatures at which it may occur,can be a major problem tothe paper-coating in
11、dustry.For example,when the waxedsurfaces in a roll of waxed paper stick together,upon separa-tion the surface films are marred and the glossy finish isdestroyed.The wax picking point and the wax blocking pointindicate an approximate temperature range at or above whichwaxed surfaces in contact with
12、each other are likely to causesurface film injury.6.Apparatus6.1 Wax Coating DeviceAny manual-or machine-drivenwaxer that gives uniform coatings of the desired weights to astrip of paper not less than 51 mm(2 in.)wide.6.2 Trimming Board,or other device for cutting paper strips.6.3 Paper Scales,sensi
13、tive to 0.002 g,or suitable balancefor measuring basis weights of unwaxed and waxed paper.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricantsand is the direct responsibility ofSubcommittee D02.10.0A on Physical/Chemical Properties.This t
14、est method wasprepared jointly by the TechnicalAssociation of the Pulp and Paper Industry and theAmerican Society for Testing and Materials.Current edition approved Oct.1,2015.Published December 2015.Originallyapproved in 1957.Last previous edition approved in 2010 as D1465 10.DOI:10.1520/D1465-10R1
15、5.2For 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 ASTM International,100 Barr Harbor Drive,PO Box C700,W
16、est Conshohocken,PA 19428-2959.United States1 6.4 Blocking Plate Assembly,consisting of a metal plate305 mm(12 in.)wide,13 mm to 51 mm(12in.to 2 in.)thick,and 559 mm to 914 mm(22 in.to 36 in.)long.It is heated atone end and cooled at the other end to provide a 457 mm to762 mm(18 in.to 30 in.)test section having an averagetemperature gradient of 0.8 C to 2.2 C(1.5 F to 4.0 F)in.The temperature gradient across the width of the plate from thelongitudinal axis to 25 mm(1 in.)from the edge must notex
