ASTM D2260-03
(Guide)Standard Tables of Conversion Factors and Equivalent Yarn Numbers Measured in Various Numbering Systems
Standard Tables of Conversion Factors and Equivalent Yarn Numbers Measured in Various Numbering Systems
SCOPE
1.1 These tables include (1) a series of conversion factors required to convert the number of a yarn measured in a specific system to the equivalent number measured in various other systems (see Table 1), and (2) specific equivalent numbers for yarns measured in various systems (see Table 2).
1.2 The content is basically consistent with recommendations of the International Organization for Standardization (ISO) Standard 2947.
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Designation:D2260–03
Standard Tables of
Conversion Factors and Equivalent Yarn Numbers Measured
1
in Various Numbering Systems
This standard is issued under the fixed designation D 2260; 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
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 These tables include (1) a series of conversion factors 3.1 Refer to Terminology D 4849 for definition of the
required to convert the number of a yarn measured in a specific following ters used in this standard: American graincount;
system to the equivalent number measured in various other cotton count; cut, in asbestos and glass yarns, cut, in wool
systems (see Table 1), and (2) specific equivalent numbers for yarns; denier; direct yarn numbering systems; grain, in yarn
yarns measured in various systems (see Table 2). spinning; grain, in measuring mass; indirect yarn numbering
1.2 The content is basically consistent with recommenda- system; linear density; lea, in linen yarns; metric count; run, in
tions of the International Organization for Standardization the american woolen system; tex; worsted count; yarn number;
(ISO) Standard 2947. and yarn numbering system.
3.2 Refer to Terminology D 123 for definitions of other
2. Referenced Documents
terms used in this standard.
2.1 ASTM Standards:
2
4. Conversion Factors for Equivalent Yarn Numbers
D 123 Terminology Relating to Textiles
D 861 Practice for Use of the Tex System to Designate 4.1 Calculate any equivalent value using the appropriate
2
Linear Density of Fibers, Yarn Intermediates, and Yarns factor listed in Table 1.
3
D 3888 Terminology Related to Open-End Spinning
3
5. Use of Previously Calculated Equivalent Yarn
D 3990 Terminology Relating to Fabric Defects
3 Numbers
D 4849 Terminology Relating to Fibers and Yarns
SI 10 Standard for Use of the International System of Units 5.1 For a specific number in a stated system, read the
3
(SI): The Modern Metric System equivalent in the various other systems from Table 2.
5.2 With a few exceptions, fractional traditional indirect
2.2 ISO Standard:
ISO2947, Textiles–IntegratedConversionTableforReplac- counts have been omitted fromTable 2; the rounded tex system
values for most fractional traditional indirect counts can be
ingTraditionalYarnNumbersbyRoundedNumbersinthe
4
Tex System obtained by interpolation.
2.3 NIST Standard:
6. Implementation of the Tex Yarn Numbering System
5
NBS–M–121–January, 1936
6.1 In Table 2, to encourage the implementation of the tex
system in the United States, rounded tex values were chosen to
1
These tables are under the jurisdiction of ASTM Committee D13 on Textiles
accommodate as many yarn numbers as possible for the
and are the direct responsibility of Subcommittee D13.58 on Yarn and Fiber Test
traditional yarn numbering systems without encroaching on
Methods.
Current edition approved Feb. 10, 2003. Published April 2003. Originally
established tolerances. In addition to the rounded tex system
approved in 1964. Last previous edition approved in 2002 as D2260 – 02.
values, the decitex (dtex) equivalents have been included
2
Annual Book of ASTM Standards, Vol 07.01.
3 because they can be used throughout most of the count range
ExcerptsfromSI 10,StandardforUseoftheInternationalSystemofUnits(SI):
without employing decimal fractions. The choice of unit is
The Modern Metric Syste, can be found in the Annual Book of ASTM Standards,
Vols07.01and07.02.Thestandardisavailableasaseparatepublicationandappears
entirely a matter to be determined by each sector of the trade;
in its entirety in Vol 14.02.
decitex, for example, is particularly suitable for fine yarns
4
American National Standards Institute, 11 West 42nd Street, 13th Floor, New
(whether spun or filament) and tex for medium and coarse
York, NY 10036.
5
Available from National Institute of Standards and Technology, Gaithersburg, yarns.
MD 20899.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2260–03
A
TABLE 1 Conversion Factors for Converting from One Yarn Numbering System to Another
System for Which Yarn Number is Known
System for Which Yarn Number is
American Cotton Worsted Metric Linen Lea
B
Needed
Tex Denier Woolen Run Yd/lb
Grain Count Count Count Count Woolen Cut
B
Tex (g/1000 m) tex = . den 0.590 541 590.541 885.812 310.034 1 000 1 653.52 496 055
9 3 gr cc wc wr mc lea y
Denier (g/9000 m) den = 9 3 tex . 5.314 87 5 314.87 7 972.31 2 790.31 9 000 14 881.6 4 464 492
3 gr
cc wc wr mc lea y
American Grain Count (grains/120 yd) gr = tex de
...
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