1、Designation: D1909 04 (Reapproved 2012)StandardTable of Commercial Moisture Regains for Textile Fibers1This standard is issued under the fixed designation D1909; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revi
2、sion. 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 table lists the commercial moisture regains com-monly used for a number of textile fibers. Such moisture regainvalues are
3、intended primarily for determining the commercialweight of a specific fiber when the fiber is bought or sold onthis basis. These regain values also are used in calculating thelinear density of yarn in procedures employing such factors andin the quantitative analysis of fiber blends.2. Referenced Doc
4、uments2.1 ASTM Standards:2D123 Terminology Relating to TextilesD2118 Practice for Assigning a Standard CommercialMoisture Content for Wool and its ProductsD2720 Practice for Calculation of Commercial Weight andYield of Scoured Wool, Top, and Noil for Various Com-mercial Compositions3. Terminology3.1
5、 Definitions:3.1.1 commercial moisture regain (CMR), na formallyadopted, arbitrary value, to be used with the oven-dried mass oftextile fibers, when calculating the commercial mass of ashipment or delivery.3.1.2 For definitions of other textile terms used, refer toTerminology D123.4. Significance an
6、d Use4.1 The value listed for the commercial moisture regain of aspecific fiber type is not an experimentally determined quantitybut a purely arbitrary value arrived at for commercial purposesby interested parties. The actual moisture regain values oftextile materials, when in moisture equilibrium w
7、ith the stan-dard atmosphere for testing, bear no consistent relation to thecommercial moisture regain values listed herein. Equilibriummoisture regain values depend upon the previous history of thematerial.5. Table of Commercial Moisture Regain Values5.1 Commercial moisture regain values for specif
8、ied fibersare listed in Table 1.6. Keywords6.1 moisture regain; textile fiber1This table is under the jurisdiction of ASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.51 on Conditioning and, Chemicaland Thermal Properties.Current edition approved Feb. 1, 2012. Publi
9、shed February 2012. Originallyapproved in 1961. Last previous edition approved in 2004 as D1909 04. DOI:10.1520/D1909-04R12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, r
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15、rmission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 1 Commercial Moisture Regain ValuesFiber Regain, % Fiber Regain, %Acetate (secondary) 6.5 ModacrylicGAcrylic 1.5 Class I 0.4Aramid, forAClass II 2.0High Modulus Yarn 3.5Standard Yarn 7
16、.0Class III 3.0Nylon (polyamide) 4.5Olefin 0.0Azlon 10.0 Polyester 0.4Cotton RamieRaw cottonBRaw 7.6Natural cotton yarn 7.0CScoured 7.8Dyed cotton yarn 8.0CRayon (regenerated cellulose) 11.0Mercerized cotton yarn 8.5CRubber 0.0Flax (raw) 12.0DSaran 0.0Flax (linen) 8.75 Silk 11.0Fluorocarbon 0.0 Span
17、dex 1.3Glass 0.0 Triacetate (primary) 3.5Hemp 12.0DVinal 4.5Jute 13.75DVinyon 0.0Metallic 0.0 Wool (all forms) 13.6E,FAAramid polymers are manufactured for specific but diverse end uses and have nominal regains that vary in the range 1.5 to 7.0 %. The values listed in the table arethe commercial reg
18、ains of fibers currently produced.BThere is no commercial regain value for raw cotton in U.S. trade. The value specified in Rule 15 of the Egyptian sales contracts and in Rule 105 of the Liverpool salescontract for Egyptian and Syrian cotton is 8.5. The value 8.5 is also used customarily for the cot
19、ton component of blends containing cotton in the process of performingquantitative analysis.CCommercial Standard CS11-63, which is issued by the National Bureau of Standards, recommends these values to be used for cotton yarns by dyers and finishers.DThese values are the official commercial moisture
20、 regains listed in British Standards Handbook 11, Methods of Test for Textiles, Section 1, 1963.EAmoisture content of 12.0 %, which is equal to a moisture regain of 13.6 %, has been recommended for all wool yarns in Practice D2118. However, certain other regainvalues are commonly used. Other values,
21、 which should perhaps be classified as commercial allowance values, are listed below for information only.Woolen yarn 13.0Woolen hand knitting yarn 11.1Worsted yarn (dry spun) 15.0Worsted yarn (oil spun) 13.0FFor the commercial moisture contents of wools to which various specific commercial designations are applied, see Practice D2720.GClass III modacrylic fibers include such fibers as Verel modacrylic fiber. Class II includes such fibers as SEF modacrylic fiber. Class I modacrylic fibers includes allother modacrylic fibers.D1909 04 (2012)2
