1、 ASTM D2753 89 0759510 0027082 9 W Ib Designation:D 2753-89 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race St.,Philadelphia,Pa.i9103 Reprinted from lhe Annual Book of ASTM Slandards.Copyright ASTM If not lisled in lhe current combined index,will appear in the next edilion.Standard Specificatio
2、n for Electrolytic Capacitor Paper This standard is issued under the fixed designation D 2753;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A
3、superscript epsilon(e)indicates an ediforial change since the last revision or reapproval.1,Scope use as separators in electrolytic capacitors.kraft capacitor tissues.regarded as the standard.ness are essential to a satisfactory sheet.6.Chemical Requirements the requirements listed in Table 2.7.Phys
4、ical Requirements 1.1 The specification covers electrical papers suitable for 1.1.1 These papers are not primary dielectrics as are the 1.2 The values stated in inch-pound units are to be 6.1 The chemical properties of the paper shall conform to 2.Referenced Documents 2.1 ASTM Standards:D 202 Test M
5、ethods for Sampling and Testing Untreated D 1099 Test Method for Water Soluble Sulfates in Paper D 1930 Specification for Kraft Dielectric Tissue Capacitor E 29 Practice for Using Significant Digits in Test Data to Paper Used for Electrical Insulation and Paperboard3 Grade4 Determine Conformance wit
6、h Specifications 3.Types and Grades types,based on the fiber composition:seed-hair sources.grades,based on apparent density(see Table 1).3.1 Electrolytic separator papers are divided into two.3.1.1 Kraft wood fibers,and 3.1.2 Long,nonwood cellulose fibers from leaf,stem,or 3.2 Within each type,these
7、 papers are subdivided into 4.Basis of Purchase 4.1 Orders for material to this specification shall specify paper,type,grade,thickness,width,and diameter of rolls in accordance with this specification.For example:electrolytic capacitor paper(Type I,Grade 5)0.002 by 2 in.(0.05 1 by 5 1 mm);rolls 6411
8、.(150-mm)outside diameter by l%-in,(28-mm)inside diameter core ASTM Specification D 2753.5.Materials and Manufacture 5.1 This paper shall be made from either unbleached sulfate pulp of coniferous origin or from long,nonwood,unbleached cellulose fibers,of stem leaf or seed-hair origin.5.2 Very high d
9、egrees of physical uniformity and cleanli-*This specification is under the jurisdiction of ASTM Committee D-9 on Electrical Insulating Materials and is the direct responsibility of Subcommittee W9.19 on Dielectric Sheet and Roll Products.Current edition approved Jan.27,1989.Published May 1989.Origin
10、ally published as D 2753-68.Last previous edition D 2753-68(1983).Annual Book of ASTM Standards,Vol 10.01.Discontinued;see 1979 Annual Book ofASTM Standards,Part 20.Discontinued;see 1986 Annual Book of ASTM Standards,Vol 10.01,Annual Book of ASTM Standards,Vol 14.02.1 7.1 The physical properties of
11、the paper shall conform to the requirements prescribed in Table 3 as well as the density requirements prescribed in Table 1.7.2 The material shall be uniform in thickness,density,and formation.It shall be as free from welts,wrinkles,creases,slime spots,stains,weak spots,tears,cuts,resin,dirt,and met
12、allic particles,as is consistent with good manufac-turing processes and in keeping with the requirements of this specification.8.Condition of Rolls 8.1 The paper shall be supplied in rolls,slit to the ordered width,within the tolerance specified in Table 4.8.2 Splices in roils are undesirable but wh
13、ere necessary splices shall be made with an adhesive,such that the spliced area shall meet all requirements of Table 2,except the limits on moisture content.The number of splices permitted shall be agreed upon between the purchaser and the supplier.8.3 The internal diameter of each core shall at no
14、point be less than the specified nominal value nor shall it exceed that nominal value by more than 1/1 6 in.(2 mm)or 2%,whichever is greater.8.4 Both faces of each roll shall be at a 90 angle to the axis of the core(tolerance+1%),and no turn of paper shall extend more than I 1 6 4 in.(0.4 mm)beyond
15、the edge of an adjoining turn nor more than 9 3 2 in.(1 mm)beyond the principal plane of either face.8.5 Rolls shall be firmly wound to the specified outer diameter,+O,42 in.,and their circumferences shall be free of humps or flat spots.8.6 The methods of evaluating characteristics listed in 8.4 and
16、 8.5 shall be agreed upon between the purchaser and the seller.9.Interpretation of Requirements 9.1 For purposes of determining conformance with this specification,an observed or calculated value shall be rounded off,in accordance with the Section on Rounding-O f f Method of Practice E 29.9.2 Unless otherwise stated,all limits in this specification apply to the test determination applicable to a unit sample as defined in Test Methods D 202.Values beyond the stated limits classify the unit as a m
