Standard Practice for Conditioning and Testing Textiles

ABSTRACT
This practice covers the conditioning and testing of textiles in those instances where such conditioning is specified in a test method. Because prior exposure of textiles to high or low humidity may affect the equilibrium moisture pick-up, a procedure also is given for preconditioning the material when specified. The equipments to be used in the conditioning and testing of textiles shall include conditioning room or chamber, psychrometer ventilated by aspiration, preconditioning cabinet, room, or suitable container, balance, and multiple shelf conditioning rack. The conditioning room or chamber shall consist of equipment for maintaining the standard atmosphere for testing textiles throughout the room or chamber within the tolerances given and including facilities for circulating air over all surfaces of the exposed sample or specimen and equipment for recording the temperature and relative humidity of the air in the conditioning room or chamber. Samples or specimens requiring preconditioning shall be brought to a relatively low moisture content in a specified atmosphere. Samples or specimens requiring conditioning shall be brought to moisture equilibrium for testing in the standard atmosphere for testing textiles, or when required.
SCOPE
1.1 This practice covers the conditioning of textiles for testing in those instances where such conditioning is specified in a test method. Because prior exposure of textiles to high or low humidity may affect the equilibrium moisture pick-up, a procedure is also given for preconditioning the materials when specified.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as the standard. Within the text, the inch-pound units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Publication Date
29-Feb-2004
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ASTM D1776-04 - Standard Practice for Conditioning and Testing Textiles
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D 1776–04
Standard Practice for
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Conditioning and Testing Textiles
This standard is issued under the fixed designation D 1776; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 2.2 ISO Standard:
ISO 139 Textiles Standard Atmosphere for Conditioning
1.1 This practice covers the conditioning and testing of
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and Testing
textiles in those instances where such conditioning is specified
in a test method. Because prior exposure of textiles to high or
3. Terminology
low humidity may affect the equilibrium moisture pick-up, a
3.1 Definitions:
procedure also is given for preconditioning the material when
3.1.1 moisture content, n—that part of the total mass of a
specified.
material that is absorbed or adsorbed water, expressed as a
1.2 The values stated in either SI units or inch-pound units
percentage of the total mass.
are to be regarded separately as the standard. Within the text,
3.1.1.1 Discussion—The total mass is the original mass
the inch-pound units are shown in parentheses. The values
comprising the dry substance plus any water present.The word
stated in each system are not exact equivalents; therefore, each
water as used in these definitions refers to the compound
system shall be used independently of the other. Combining
chemically defined as H O. The terms water and moisture
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values from the two systems may result in nonconformance
frequently are used interchangeably in the literature and the
with the specification.
trade,buttheterm moistureissometimesconsideredtoinclude
1.3 This standard does not purport to address all of the
other volatile material.
safety concerns, if any, associated with its use. It is the
3.1.2 moisture equilibrium, n—the condition reached by a
responsibility of the user of this standard to establish appro-
material when it no longer takes up moisture from, or gives up
priate safety and health practices and determine the applica-
moisture to, the surrounding atmosphere.
bility of regulatory limitations prior to use.
3.1.2.1 Discussion—Superficialequilibriumwiththefilmof
2. Referenced Documents air in contact with the textile material is reached very rapidly.
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Moisture equilibrium can be reached in a reasonable time only
2.1 ASTM Standards:
if the air to which the sample is exposed is in motion. Moisture
D 123 Terminology Relating to Textiles
equilibrium with the air in motion is considered to be realized
D 578 Specification for Glass Fiber Strands
when successive weighings do not show a progressive change
D 618 Practice for Conditioning Plastics and Electrical
inmassgreaterthanthetoleranceestablishedforvarioustextile
Insulating Materials for Testing
materials.
D 885 Test Methods for Tire Cords, Tire Cord Fabrics, and
3.1.3 moisture equilibrium, for preconditioning, n—the
Industrial Filament Yarns and Cords Made from Man-
moisture condition reached by a sample or specimen after
Made Organic-Base Fibers
exposure to moving air in the standard atmosphere for precon-
D 1776 Practice for Conditioning Textiles for Testing
ditioning.
D 4920 Terminology Relating to Moisture in Textiles
3.1.4 moisture equilibrium, for testing, n— the condition
E 337 Test Method for Measuring Humidity With a Psy-
reached by a sample or specimen during free exposure to
chrometer (the Measurement of Wet- and Dry-Bulb Tem-
moving air controlled at specified conditions.
perature)
3.1.4.1 Discussion—For test purposes, moisture equilib-
rium must be reached by adsorption, starting from a relatively
moisture content. Moisture equilibrium for testing is consid-
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ThispracticeisunderthejurisdictionofASTMCommitteeD13onTextilesand
ered as having been reached when the rate of increase in mass
is the direct responsibility of Subcommittee D13.51 on Conditioning and, Chemical
and Thermal Properties.
of a sample or specimen does not exceed that specified for the
Current edition approvedMarch 1, 2004. Published March 2004. Originally
material being tested.
approved in 1998. Last previous edition approved in 1998 as D1776–98.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer tot he standard’s Document summary page on Available fromAmerican National Standards Institute, 11 W. 42nd Street, 13th
the ASTM website. Floor, New York, NY 10036.
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