1、Designation:D406399(Reapproved 2009)Standard Specification forPressboard for Electrical Insulating Purposes1This standard is issued under the fixed designation D4063;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last re
2、vision.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 specification covers pressboard for electrical insu-lating purposes,manufactured from kraft,cotton,or kraft andcotton pulps.T
3、his board is intended for dielectrical or struc-tural purposes in transformers and other electrical apparatus.1.2 Electrical insulating boards are most commonly referredto(and will be referred to herein)as pressboard.Other termsused for pressboard include transformer board,fuller board,and presspan.
4、1.3 This specification covers pressboard having a nominalthickness of 0.030 to 0.315 in.(0.8 to 8.0 mm).For thinnermaterial refer to Specification D1305.1.4 The maximum thickness available will differ with thetype and the manufacturer.The maximum sheet size will differwith the thickness,type,and man
5、ufacturer.1.5 Pressboard shall normally be plied wet without pasting.Unless specified by the purchaser,this specification does notinclude pressboard comprised of two or more sheets that havebeen laminated together using an adhesive.NOTE1The materials described in this specification are similar tocor
6、responding types of pressboard described in IEC Specification 641-3,Sheet 1,Types B.0.1,B.2.1,B.2.3,B.3.1,and B.3.3.1.6 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyan
7、d are not considered standard.2.Referenced Documents2.1 ASTM Standards:2D1305 Specification for Electrical Insulating Paper andPaperboardSulfate(Kraft)Layer TypeD1711 Terminology Relating to Electrical InsulationD3394 Test Methods for Sampling and Testing ElectricalInsulating Board2.2 IEC Standards-
8、Publication:641-3,Specification for Pressboard and Presspaper for Elec-trical PurposesPart 333.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this specification referto Terminology D1711.3.1.2 calendered pressboard,npressboard produced bydrying without restraint and then calenderi
9、ng between steelrolls to obtain the desired thickness and density.3.1.3 cotton pulp,ncellulose fibers normally obtained bypulping of new cotton garment cuttings.3.1.3.1 DiscussionIncluded in cotton pulp is pulp calledcotton-linter pulp which is derived from cotton fibers adheredto cotton seed but se
10、parated from cotton seed subsequent toginning.3.1.4 kraft pulp,n(unbleached sulfate pulp)cellulosefibers normally obtained from softwood(coniferous)treesusing the sulfate kraft process of cooking.3.1.5 precompressed pressboard,npressboard producedby press-drying between heated platens to obtain desi
11、redthickness and density.4.Classification4.1 This specification covers the following three types ofpressboard:4.1.1 Type 1High-purity calendered pressboard.4.1.2 Type 2Normal-purity calendered pressboard.4.1.3 Type 3Precompressed pressboard.5.Ordering Information5.1 Orders for material furnished und
12、er this specificationshall include:5.1.1 Name of material,5.1.2 Grade of pressboard(selected from Table 1),5.1.3 Quantity(weight or number of sheets),5.1.4 Dimensions(thickness,width,length),and1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating
13、 Materials and is the direct responsibility ofSubcommittee D09.19 on Dielectric Sheet and Roll Products.Current edition approved Oct.1,2009.Published February 2010.Originallyapproved in 1981.Last previous edition approved in 2004 as D4063 99(2004).DOI:10.1520/D4063-99R09.2For referenced ASTM standar
14、ds,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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,N
15、Y 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.1.5 Additions or exceptions to the specification andsupplementary requirements,if required,such as thermallyupgraded material.6.Materials and Manufacture6.1 The
16、pressboard will be manufactured from unbleachedkraft pulp,cotton pulp,or a combination of unbleached kraftpulp and cotton pulp.6.2 The proportion of cotton pulp,by weight,will be asspecified in Table 1.6.3 Cotton pulp in trace quantities in kraft pulp grades ispermitted.Kraft pulp in trace quantities in cotton pulp gradesis permitted.6.4 No ingredients other than the cellulose fibers listed in6.1 or additions listed in 5.1.5 shall be permitted.7.Property Requirements7.1 Pressboard shall conform
