ASTM D1776-08

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Designation:D 1776–08
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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope ISO 139 Textiles Standard Atmosphere for Conditioning
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and Testing
1.1 This practice covers the conditioning and testing of
textiles when conditioning is specified in a test method.
3. Terminology
Becausepriorexposureoftextilestohighorlowhumiditymay
3.1 Definitions:
affect moisture pick-up equilibrium, a procedure also is given
3.1.1 accelerated conditioning, n— a process that uses
for preconditioning the material when required.
humidity generation and precise temperature controls to rap-
1.2 The values stated the text are in SI units. Inch-pound
idly bring a textile to equilibrium in a standard atmosphere.
units are shown in parentheses. The values stated in each
3.1.1.1 Discussion—Accelerated conditioning may be
system are not exact equivalents; therefore, each system shall
achieved in closed cabinets, rooms or process lines designed
be used independently of the other. Combining values from the
such that equilibrium can be achieved in a much shorter time,
two systems may result in nonconformance to a specification.
such as 2 to 10 minutes, compared to typical conditioning
1.3 This standard does not purport to address all of the
times.
safety concerns, if any, associated with its use. It is the
3.1.2 moisture content, n—that part of the total mass of a
responsibility of the user of this standard to establish appro-
material that is absorbed or adsorbed water, expressed as a
priate safety and health practices and determine the applica-
percentage of the total mass.
bility of regulatory limitations prior to use.
3.1.2.1 Discussion—The total mass is the original mass
2. Referenced Documents comprising the dry substance plus any water present.The word
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water as used in these definitions refers to the compound
2.1 ASTM Standards:
chemically defined as H O. The terms water and moisture
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D 123 Terminology Relating to Textiles
frequently are used interchangeably in the literature and the
D 618 Practice for Conditioning Plastics for Testing
trade, but the term moisture is sometimes considered to include
D 885 Test Methods for Tire Cords, Tire Cord Fabrics, and
other volatile matter.
Industrial Filament Yarns Made from Manufactured
3.1.3 moisture equilibrium, n— the state of condition a
Organic-Base Fibers
textile reaches when it no longer takes up moisture from, or
D 1776 Practice for Conditioning and Testing Textiles
gives up moisture to, the surrounding atmosphere.
D 4920 Terminology Relating to Conditioning, Chemical,
3.1.3.1 Discussion—Superficial equilibrium is reached very
and Thermal Properties
rapidly when air comes into contact with the outer surfaces of
D 7269 Test Methods for Tensile Testing of Aramid Yarns
a textile. Moisture equilibrium can be reached in a reasonable
E 337 Test Method for Measuring Humidity with a Psy-
timeonlyiftheairtowhichthesampleisexposedisinmotion.
chrometer (the Measurement of Wet- and Dry-Bulb Tem-
Moisture equilibrium, with air temperature (in motion) and
peratures)
relative humidity controlled to prescribed levels, is achieved
2.2 ISO Standard:
when successive weighings do not show a progressive change
in mass greater than the tolerance established for the textile.
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ThispracticeisunderthejurisdictionofASTMCommitteeD13onTextilesand
3.1.4 moisture equilibrium, for preconditioning, n—the
is the direct responsibility of Subcommittee D13.51 on Conditioning and, Chemical
moisture state of a textile sample(s) or specimen(s) reached
and Thermal Properties.
after exposure to moving air in the standard atmosphere for
Current edition approved Aug. 1, 2008. Published October 2008. Originally
approved in 1998. Last previous edition approved in 2004 as D 1776–04.
preconditioning.
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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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D 1776–08
3.1.5 moisture equilibrium, for testing, n—the state of a and products, and among different laboratories, it is necessary
textile sample(s) or specimen (s) reaches after exposure to to
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