1、 ASTM Db8L 87 m 0759530 0535457 T22 m AMERICAN SCIElY FOR TESTING AND MATERIALS 1916 RaceSt Philadelphia,Pa 19103 Reprinted from the Annual Book of ASTM Standards.Copyrlght ASTI If not listed In the current comblned index,will appear in the next edition.flBb Designation:D 681-87(Reapproved 1993)Stan
2、dard Specification for Jute Rove and Plied Yarn for Electrical and Packing Purposes This standard is issued under the fixed designation D 681;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 pare
3、ntheses indicates the year of last reapproval.A superscript epsilon(t)indicates an editorial change since the last revision or reapproval.(1 NOTE-Editoriai changes were made throughout in December 1993.1.Scope 1.1 This specification covers tolerances for jute single and plied rove and jute plied yam
4、s,both treated and untreated products,designed for electrical and packing purposes.1.2 Tolerances for the various properties and the test methods upon which the tolerances are based are included in the following sections:Yam or Rove Number 4 12 Breaking Load(Strength)-Single Strand 5 13 Twist 6 7 14
5、 Extractable Matter with Organic Solvents 8 15 Properties Tolerances Test Methods NOTE 1-For tolerances and test methods for single-jute yam,refer to Specification D541,for methods for twine,refer to Specification D 1233.1.3 The following hazards caveat pertains only to the test method portion,Secti
6、ons 12,13,14,and 15,of this specification:This standard does not purport to address all of the safety problems,if any,associated with its use.It is the responsibility of the user of this standard to establish appro-priate sdety and health practices and determine the applica-bility of regulatory limi
7、tations prior to use.See 15.4.2.Referenced Documents 2.1 ASTM Standards:D 76 Specification for Tensile Testing Machines for D 123 Terminology Relating to Textiles2 D 541 Specification for Single Jute Yam2 D 1233 Specification for Twine Made from Bast and Leaf D1423 Test Method for Twist in Yams by t
8、he Direct-D 2256 Test Method for Tensile Properties of Yams by the D 2257 Test Method for Extractable Matter in Textiles2 D 2258 Practice for Sampling Yarn for Testing2 2.2 Other Standard:Textiles2 Fibers2 Counting Method2 Single-Strand Method2 I This specification is under the jurisdiction of ASTM
9、Committee D-13 on Textiles,and is the direct responsibility of Subcommittee D13.15 on Bast and Leaf fibers and Their Products.Current edition approved July 31,1987.Published September 1987.Originally published as D 68 1-42 T.Last previous edition D 68 I-8 1.Annual Book oJASTM Standards,Vol 07.01.U.S
10、.Bureau of Alcohol,Tobacco and Firearms,Title 27,Code of Federal Regulations,Part 2 12.1 g3 3.Terminology 3.1 Definitions:3.1.1 extractable matter,n-nonfibrous material in or on a textile,not including water,which is removable by a specified solvent or solvents,as directed in a specified procedure.3
11、.I.1.1 Discussion-Nonfibrous material is usually oily,waxy,resinous,or polymeric in nature,but may also include other material such as protein,particularly if ethyl alcohol is used as,or in,the extracting solvent.3.1.2 jute-soft fibers from the inner bark of the round pod jute(Corchorus capsularis),
12、the long pod jute(Corchorus ofitorius),and from the inner bark of other closely related plans,such as kenaf,sometimes referred to as Meshta(Hibiscus cannabinus).3.1.3 rove-in jute processing,a continuous strand of spun-jute fiber having a spyndle number of 50 or greater.3.1.4 spyndle number-in jute,
13、a direct yam-numbering system for jute rove and jute yarns in which the number of pounds per spyndle,or 13 167-m(14 400-yd)length,is expressed as pounds per spyndle.3.1.4.1 Discussion-For example,a mass of 30 lb/14 400 yd(13 167 m)length is expressed as 30 lb/spyndle.3.1.5 tolerances,n-in mathematic
14、s,prescribed limits of variation for specified properties of a particular material based on observed values obtained by specified test methods and on samples that are representative of the material.3.1.6 For definitions of other textile terms used in this standard,refer to Terminology D 123.REQUIREM
15、ENTS 4.Yarn or Rove Number 4.1 The average yam or rove number of the acceptance sampling lot shall be as agreed upon between the purchaser and the seller within the following permissible limitations,which are based on the number of test units and specimens specified in Sections 10 and 12.3:Untreated
16、 yam or rove Treated yam or rove,including impregnant I 5%*to 96 Available from Superintendent of Documents,Government Printing Oftice,Washington,DC 20234.1 NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.ASTM Db83 87=0759530 0535458 969 H r 4m D681 5.Breaking Load(Strength)-Single Strand 5.1 The average breaking load or strength of the yarn or rove shall be not less than that agreed