ASTM D2252-2018 Standard Specification for Fineness of Types of Alpaca.pdf

1、Designation: D2252 18Standard Specification forFineness of Types of Alpaca1This standard is issued under the fixed designation D2252; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthese

2、s indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification is applicable in the classification ofalpaca into types according to fineness.1.2 The values stated in inch-pound units are to be regard

3、edas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user o

4、f this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the

5、 Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD2130 Test Method for Diameter of Wool

6、and Other AnimalFibers by MicroprojectionD4845 Terminology Relating to Wool3. Terminology3.1 For definitions of textile terms used in this specification:alpaca, average fiber diameter, fineness, refer to TerminologyD4845.3.2 For definitions of other textile terms used in thisspecification, refer to

7、Terminology D123.4. Significance and Use4.1 This specification for fineness is intended as a guide forproduction, preparation, and marketing (Note 1) by comparingthe average fiber diameter of a measured specimen with thefineness specifications for the various types listed in Table 1.The standard dev

8、iation which expresses measured variabilityof a specimen may be compared with the average shown inTable X2.1.NOTE 1Test Method D2130 does not include any values for theprecision to be expected in the testing of alpaca fibers. In an interlabora-tory test in which six laboratories each made one test o

9、n each of six typesamples, HTB-CB, HAXB-CB, HAAB-CB, HAB-CB, HLPB-CL, andHSKB-CL, the coefficient of variation of the average fiber diametersbetween laboratories, including test variation, was 3.2, 4.7, 3.8, 4.5, 2.2,and 0.93 % for the respective alpaca types.5. Specification5.1 The fineness of vari

10、ous types of alpaca shall conform tothe average fiber diameter limits listed in Table 1.6. Sampling6.1 Sample the material as directed in Test Method D2130.7. Test Method7.1 Test the material as directed in Test Method D2130.Measure at least the minimum number of fibers specified toattain confidence

11、 limits of the mean of 60.5 m at a probabil-ity level of at least 95 % (see Table A1.4 in Annex A1 to TestMethod D2130).8. Keywords8.1 alpaca; animal fibers (except wool); fineness1This specification is under the jurisdiction of ASTM Committee D13 onTextiles and is the direct responsibility of Subco

12、mmittee D13.13 on Wool and Felt.Current edition approved July 1, 2018. Published August 2018. Originallyapproved in 1964. Last previous edition approved in 2009 as D2252 05(2009)which was withdrawn January 2018 and reinstated in July 2018. DOI: 10.1520/D2252-182For referenced ASTM standards, visit t

13、he 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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959.

14、United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barr

15、iers to Trade (TBT) Committee.1APPENDIXES(Nonmandatory Information)X1. DESCRIPTION AND FINENESS VARIABILITY OF ALPACA TYPESX1.1 The following are the trade categories for classifica-tion of alpaca for market with explanation of the types andsymbols used in the commercial classification system:X1.1.1

16、 Variety, Species, Breed, or Strain:(Symbol and Description)HHuacayaSSuriX1.1.2 Age:(Symbol and Description)TTui, first shear, 12 months growthAAdult, 12 months growthX1.1.3 Type:(Symbol and Description) TTui, 12 months ageTSKTui, SkirtingsX1.1.3.1 TSK type alpaca may be expected to range from24 to

17、28 m average fiber diameter.XExtra Fine AdultAAMedium AdultACoarseSKSkirtingsLPLocks and PiecesX1.1.4 Colors:(Symbol and Description)BBlanco-WhiteLFLight FawnCCastano-TanPDark and PiebaldX1.1.5 Staple Length: (Symbol and Description)CB3 in. (76 mm) or over, CombingCLUnder 3 in. (76 mm), ClothingX2.

18、FINENESS VARIABILITY OF CERTAIN ALPACA TYPESX2.1 Typical standard deviations of the fiber diameters ofvarious types of alpaca are listed in Table X2.1 for informationonly. These are not part of the specifications.TABLE 1 Fineness Specifications for Types of AlpacaType Average Diameter, mT Extra unde

19、r 22.00T 22.00 to 24.99X 22.00 to 24.99AA 25.00 to 29.99A 30.00 to 35.99SK over 30.00LP over 30.00D2252 182ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised th

20、at determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reappr

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22、eel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual re

23、prints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ X2.1 Variability of Certain Alpaca TypesTypeStandard Deviation of the FiberDiameters, mT6.6X6AA 7.7A 10.2LP variableD2252 183