ASTM_D_2654_-_67_scan.pdf

Tentative Methods of Test for AMOUNT OF MOISTURE IN TEXTILE MATERIALS ASTM Designation:D 2654-67 T These Tentative Methods have been approved by the sponsoring commit-tee and accepted by the Society in accordance with established procedures,for use pending adoption as standard.Suggestions for revisions should be addressed to the Society at 1916 Race St.,Philadelphia,Pa.19103.1.Scope 1.1 These methods cover the deter-mination of the moisture content in tex-tile materials.These methods are applica-ble to all fibers,natural and man-made,and in all forms from bulk fiber or fila-ments to finished fabrics,subject to the limitations set forth in 1.1.1 through 1.1.3.1.1.1 Option 1Oven-drying using ambient air heated to 105 C may be used in any situation in which a simple and convenient method for routine process control or in-plant evaluation is needed.It is not recommended for jute or grease wool,or for acceptance testing in com-mercial transactions.1.1.2 Option 2Oven-drying using desiccated air heated to 105 C and other refinements in technique may be used as a basis for commercial transactions for all materials for which it is known that no significant quantity of nonaqueous vola-1 Under the standardization procedure of the Society,these methods are under the jurisdic-tion of the ASTM Committee D-13 on Textile Materials,and are the direct responsibility of Subcommittee B-3 on Atmospheric Conditions and Regains.A list of committee members may be found in the ASTM Year Book.Accepted June 26,1907.tile matter is present on or in the ma-terial to be tested.1.1.3 Option 3Distillation with tol-uene is the preferred method for jute and grease wool in any circumstance,and is the preferred method for any material where it is known or suspected that a significant quantity of nonaqueous and non-water-miscible volatile matter is present.It also has the best reproducibil-ity of the three options and,therefore,may be preferred in case of dispute.1.2 Blends of fibers may also be tested by these methods.1.3 Options 1 and2 describe alternative procedures for weighing the dried speci-mens;a procedure for weighing the specimens in the oven while hot,and a procedure for sealing the specimens in a moisture-tight weighing container and cooling it in a desiccator before weighing il at room temperature.NOTE 1Other methods for determining the amount of moisture in textile materials are covered in ASTM Method D 2495,Moisture in Cotton(Oven-Drying Method),ASTM Method D 1576,Moisture in Wool by Oven-Drying,2 ASTM Method D 2462,Moisture in Wool by?lOdJ Book of ASTM Standards,Part 25.590 NOTICE:This standard has either been superseded and replaced by a new version or withdrawnContact ASTM International(www.astm.org)for the lastest information TESTS FOR AMOUNT OF MOISTURE IN TEXTILE MATERIALS(D 2654)591 Distillation with Toluene,2 and ASTM Method D 681,Methods of Test for Jute Rove and Plied Yarn for Electrical and Packing Purposes.2 2.Definitions 2.1 Moisture Content,n.The amount of moisture in a material determined un-der prescribed conditions and expressed as a percentage of the mass of the moist material,that is,the original mass com-prising the dry substance plus any mois-ture present.2.2 Moisture Regain,n.The amount of moisture in a material determined un-der prescribed conditions and expressed as a percentage of the moisture-free ma-terial.2.3 Moisture-Free,adj.The condi-tion of a material that has been exposed in an atmosphere of desiccated air until there is no progressive significant change in its mass.NOTE 2The term mass in the above definitions is the correct designation for the property commonly designated as weight.2.4 For definitions of other terms used in this method,refer to ASTM Defini-tions 1)123,Terms Relating to Textile Materials.23 3.Summary of Methods 3.1 These methods include two options based on drying in an oven,and one op-tion based on distillation with an immis-cible solvent.More detailed summaries can be found in 5.1,13.1,and 21.1.4.Uses and Significance 4.1 The measurement of moisture con-tent or of dry liber weight(Note 2)is important for several reasons,including the following:4.1.1 Large quantities of fibers and manufactured products containing some water are bought and sold on the basis of Appears in this publication.weight.The value of a particular com-modity will vary over a significant range with a variation in the amount of water it contains.4.1.2 Besides the effect of the moisture present when the material is received,the moisture present at the time of test-ing and subsequent handling and proc-essing can be quite important.4.1.2.1 Some textile fibers,particu-larly cellulosic fibers and wool,have physical properties that vary signifi-cantly with the amount of moisture pres-ent,such as tensile strength,crimp,torsional rigidity,etc.4.1.2.2 Optimum conditions for proc-esses,such as in carding,include mois-ture content as an important parameter.4.1.2.3 Control of blends is sometimes critically dependent on th