ASTM D4771-19

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D4771 −19
Standard Performance Specification for
Knitted Upholstery Fabrics for Indoor Furniture
This standard is issued under the fixed designation D4771; 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 Scope Method) (Withdrawn 2001)
D7023 Terminology Relating to Home Furnishings
1.1 This performance specification covers the performance
2.2 AATCC Standards:
requirements for knitted upholstery fabrics as used in the
TM8 Colorfastness to Crocking: Crockmeter Method
manufacture of new indoor furniture for general domestic use.
TM16.2 Colorfastness to Light: Carbon-Arc
These requirements apply to both the wale and course direc-
TM16.3 Colorfastness to Light: Xenon-Arc
tions for those factors where each fabric direction is pertinent.
TM23 Colorfastness to Burnt Gas Fumes
1.2 This performance specification is not applicable to
TM107 Colorfastness to Water
fabrics used in contract, porch, deck, or lawn furniture; nor for
TM116 Colorfastness to Crocking: Rotary Vertical Crock-
woven fabrics, bonded or laminated fabrics, or surface-coated
meter Method
fabrics (such as vinyls and urethanes).
TM129 Colorfastness to Ozone in the Atmosphere Under
High Humidities
1.3 The values stated in inch-pound units are to be regarded
EP1 Gray Scale for Color Change
as standard. The values given in parentheses are mathematical
EP8 Chromatic Transference Scale, 9-Step
conversions to SI units that are provided for information only
2.3 Federal Standard:
and are not considered standard.
16CFR, Chapter II-Consumer Product Safety Commission,
1.4 This standard does not purport to address all of the
Subchapter D-Flammable Fabrics Act Regulations
safety concerns, if any, associated with its use. It is the
2.4 Military Standard:
responsibility of the user of this standard to establish appro-
ASQ/ANSI Z1.4 Sampling Procedures and Tables for In-
priate safety, health, and environmental practices and deter-
spection by Attributes
mine the applicability of regulatory limitations prior to use.
2.5 Other Documents:
See Note 2. See 6.4.1 for a specific warning.
Joint Industry Knit Upholstery Fabric Standards and Guide-
1.5 This international standard was developed in accor-
lines
dance with internationally recognized principles on standard-
Guides for the Household Furniture Industry
ization established in the Decision on Principles for the
California Bulletin 117
Development of International Standards, Guides and Recom-
UFAC Fabric Classification Test Method for Cigarette
mendations issued by the World Trade Organization Technical
Smolder Resistance
Barriers to Trade (TBT) Committee.
NOTE 1—Reference to test methods in this specification give only the
permanent part of the designation of ASTM, AATCC, or other test
2. Referenced Documents
2.1 ASTM Standards:
The last approved version of this historical standard is referenced on
D123 Terminology Relating to Textiles
www.astm.org.
D4033 Test Method for Resistance to Yarn Slippage at the
Available from American Association of Textile Chemists and Colorists
Sewn Seam in Upholstery Fabrics (Dynamic Fatigue
(AATCC), P.O. Box 12215, Research Triangle Park, NC 27709, http://
www.aatcc.org.
Available from Superintendent of Documents, U.S. Government Printing
Office, Washington, DC 20402.
1 6
This performance specification is under the jurisdiction of ASTM Committee AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
D13 on Textiles and is the direct responsibility of Subcommittee D13.63 on Home Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Furnishings. Issued 1980, available from American Furniture Manufacturers Association,
Current edition approved Jan. 15, 2019. Published February 2019. Originally Box HP-7, High Point, NC 27261.
approvedin1988.Lastpreviouseditionapprovedin2009asD4771 – 09whichwas AvailablefromtheBureauofConsumerProtection,FederalTradeCommission,
withdrawn January 2018 and reinstated in February 2019. DOI: 10.1520/D4771-19. Washington, DC 20580. Promulgated by the FTC on Dec. 21, 1973, to be effective
For referenced ASTM standards, visit the ASTM website, www.astm.org, or on March 21, 1974.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from California Department of Consumer Affairs, Bureau of Home
Standards volume information, refer to the standard’s Document Summary page on Furnishings, 3485 Orange Grove Ave., North Highlands, CA 95660.
the ASTM website. Available from UFAC Central, Box 2436, High Point, NC 27261.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D4771−19
methods. The current editions of each test method cited shall prevail
dictate that the ultimate consumer may find acceptable articles
made from fabrics that do not conform to all of the require-
3. Terminology
ments in Table 1.
3.1 For all terminology relating to D13.54, Home Furnish-
5.2.1 Hence, no single performance specification can possi-
ings refer to Terminology D7023
blyapplytoallthevariousfabricsthatcouldbeutilizedforthis
3.1.1 The following terms are relevant to this specification:
end-use.
contract furniture, indoor furniture, upholstery fabric, uphol-
5.3 The uses and significance of particular properties and
stered furniture.
test method are discussed in the appropriate sections of the
3.2 For definitions of other textile terms used in this
specified test methods.
specification, refer to Terminology D123, D7023. Definitions
6. Test Methods
found in a dictionary of common terms are suitable for terms
used in this specification.
6.1 Resistance to Yarn Slippage—Determine the resistance
to yarn slippage (seam integrity) as directed in Test Method
4. Specification Requirements
D4033.
4.1 The properties of knitted upholstery fabrics shall con-
NOTE 2—Yarn slippage at the seams in knit fabrics is a relatively rare
form to the specification requirements in Table 1.
occurrence, limited to certain types of knit fabrics, for example, coarse-
gage Raschels and weft insertion knits. By a substantial majority, the
5. Significance and Use
failures which occur at the seams in knit fabrics are splitting or tearing
caused by needle cutting or weak yarns, or both, and stitch line thread
5.1 Fabrics intended for this end-use should meet all of the
breakage.All or any of these problems can be discovered in Test Method
requirements listed in Table 1.
D4033 if they exist in any fabric or stitch line. If it is suspected that the
5.2 It should be recognized that fabrics can be produced problem is needle cutting, seams should be sewn with progressively
smaller needles until a “passing” result is obtained. Then it is equally
utilizing an almost infinite number of combinations of con-
important to specify that production on that particular fabric should be
struction variables (for example, type of fibers, percentage of
sewn only with the needle size and type with which the “passing” result
fibers, yarn twist, yarn number, warp and pick count, chemical
was obtained. The sewn seam shall contain a stitch density of seven
and mechanical finishes.) Additionally, fashion or aesthetics
stitches per inch (25.4 mm) and a minimum of 0.5-in. (12.7-mm) seam
allowance. Experience has indicated that a Size 22 (or smaller) needle
with a light ball point will successfully sew most knitted upholstery
The carbon-arc and xenon fade-ometers available from the Atlas Electric fabrics; however, if needle cutting problems do occur, simply changing to
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