1、ASTM DI233 88 m 0759530 0536866 556 9 AMERICAN SOCIEN FOR TESTING AND MATERIALS 1916 RaceSt Philadelphia,Pa 19103 Reprinted from the Annual Book of ASTM Standards Copyright ASTM If not listed in the current combined index,will appear in the riexl editton 41)Designation:D 1233-88(Reapproved 1993)Stan
2、dard Specification for Twine Made From Bast and Leaf Fibers This standard is issued under the fixed designation D 1233;the number immediately following the designation indicates the year o original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the ye
3、ar of last reapproval.A superscript epsilon(e)indicates an editorial change since the last revision or reapproval.NOTE-EditOnal changes were made throughout December 1993.1.Scope 1.1 This specification applies to all twines,whether pol-ished or unfinished,made from bast or leaf fibers,or both,with t
4、he exception of twine made from longline hard fibers(sisal,henequen,or abaca).NOTE 1-No tests have been made to determine the applicability of the procedures in this specification when used on products made from cotton,paper,or man-made fibers.NOTE 2-For methods covering single-jute yarn,refer to Sp
5、ecifica-tion D 54 I.For methods covering jute rove and plied yam for electrical and packing purposes,refer to Specification D 68 1,I.2 Twines made from longline hard fibers are not part of this standard,and should be tested as agreed upon between the purchaser and the seller.1.3 Tolerances for the p
6、roperties and the test methods upon which they are based are included in the following sections:Properties Tolerances Test Methods Yarn Number 4 9 Breaking Load(Strength)-Single 5 I5 Strand 1.4 The following safety hazards caveat pertains only to the test methods described in this specification:This
7、 stand-ard does not purport to address all of the safety concerns,i f any,associated with its use.It is the responsibility o f the user 01 this siandard to establish appropriate safely and health practices and determine the upplicability oJ regulatory limi-lations prior to use.2.Referenced Documents
8、 2.1 ASTM Standards:D 76 Specification for Tensile Testing Machines for D 123 Terminology Relating to Textiles2 D 541 Specification for Single Jute Yarn2 D681 Specification for Jute Rove and Plied Yam for D 1776 Practice for Conditioning Textiles for Testing2 D 2258 Practice for Sampling Yarn for Te
9、sting2 D 2905 Practice for Statements on Number of Specimens Text i 1 es Electrical and Packing Purposes2 for Textiles2 3.Terminology 3.1 Definitions:3.1.1 bast and leafjbers,n-fibers derived from the inner fibrous bark and the hard coarse leaves of dicotyledonous plants such as flax,hemp,jute,and a
10、baca.3.1.1.2 Discussion-For a listing of bast and leaf fibers see Table 5 in Annex A2 of Terminology D 123.3.1.2 twine,n-(1)-a term applied loosely to a variety of textile strands used for tying such articles as parcels,bundles,or baies.(2)an aggregate of fibers or yams compacted into a partially or
11、 completely balanced twisted structure of indefi-nite length,generally used for tying or binding.3.1.3 For definitions of other textile terms used in this specification,refer to Terminology D 123.REQUIREMENTS 4.Yarn Number the following permissible variations:4.1 The average yarn number shall be as
12、specified within Yam Number,R/lb More than 5400 3600 and less Variations,Permissible%I10.0 less than 275 275 and up to 415 5400 to 3600 f7.5 f5.0 415 and over Tex,g/km 5.Breaking Load(Strength)-Single Strand 5.I The average breaking load or strength of the yam shall be not less than that agreed upon
13、 between the purchaser and the supplier.TEST METHODS 6.Significance and Uses 6.1 Because usage of twine made from bast or leaf fibers is generally related to linear measure,it is the practice to express size in tex,g/km(feet per pound).In addition,since twines of all sorts are normally used for tyin
14、g such articles as parcels,bundles,or bales,the breaking strength of a twine is an important property in determining if it will properly perform as required.Twines made from bast or leaf fibers have so little elasticity that elongation is not a property of general interest.I This specification is un
15、der the jurisdiction of ASTM Committee D-13 on Textiles,and is the direct responsibility ofSubcommittee D13.16 on Bast and Leaf Fibers and Their Products.Current edition approved Feb.26,1988.Published April 1988.Originally published as D 1233-52 T.hi previous edition D 1233-81.Annual Book oJASTM Sia
16、ndards,Vol 07.01.7.Sampling 7.1 Lot Sample-As a lot sample for acceptance testing,take at random the number of shipping cases directed in an applicable material specification or other agreement between the purchaser and the supplier,such as an agreement to use 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 DI1233 88 0759510 0536867 492=(i#D 1233 Practice D 2258.Consider shipping
