ASTM D6545-22

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6545 − 18 D6545 − 22
Standard Test Method for
Flammability of Textiles Used in Children’s Sleepwear
This standard is issued under the fixed designation D6545; 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
1.1 This test method evaluates the relative flammability of textiles and garments intended for use in children’s sleepwear. The
procedures of this test method follow testing and laundering procedures used to evaluate the flammability of children’s sleepwear
contained in U.S. Federal Regulations 16 CFR 1615 and 1616.
1.2 A textile used in children’s sleepwear must be tested in its original state and after 50 laundering and drying cycles to assess
the flame resistance of the textile relative to its use life.
1.3 This method is identical to the method outlined in the regulations 16 CFR 1615 or 1616. The regulation includes additional
information such as sampling plans, record keeping requirements, and interpretations for compliance applicable to children’s
sleepwear. Please consult 16 CFR 1615 and 1616 for these operations and interpretations.
1.4 The values stated in SI units are to be regarded as the standard; inch-pound standard. The values given in parentheses after
SI units are provided for information only.only and are not considered standard.
1.5 This test method is used to measure and describe the response of materials, products, or assemblies to heat and flame under
controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials,
products, or assemblies under actual fire conditions.
1.6 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these
tests.
1.7 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, health, and environmental health practices and determines the
applicability of regulatory limitations prior to use. Specific precautionary information is found in 8.5 and 9.5.
1.8 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.
2. Referenced Documents
2.1 ASTM Standards:
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.52 on Flammability.
Current edition approved Jan. 1, 2018June 1, 2022. Published March 2018July 2022. Originally approved in 2000. Last previous edition approved in 20102018 as
D6545–10. DOI:10.1520/D6545-18.–18. DOI:10.1520/D6545-22.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6545 − 22
D123 Terminology Relating to Textiles
D1230 Test Method for Flammability of Apparel Textiles
D4391 Terminology Relating to The Burning Behavior of Textiles
E176 Terminology of Fire Standards
2.2 AATCC Test Method:
AATCC Manual of International Test Methods and Procedures
LP1 Home Laundering: Machine Washing
Glossary of AATCC Standard TerminologyM11 Glossary of AATCC Standard Terminology
AATCC Test Method 124 Appearance of Fabrics After Repeated Home Laundering
2.3 Federal Standards and Regulations:
16 CFR Part 1610 Standard for the Flammability of Clothing Textiles
16 CFR Part 1611 Vinyl Plastic Film
16 CFR Part 1615 Standard for the Flammability of Children’s Sleepwear: Sizes 0 through 6X
16 CFR Part 1616 Standard for the Flammability of Children’s Sleepwear: Sizes 7 through 14
Department of Commerce Voluntary Product Standard, previously identified as Commercial Standard, CS 151-50 “Body
Measurements for the Sizing of Apparel for Infants, Babies, Toddlers, and Children”
2.4 ISO Standard:
ISO 13943 Fire Safety — Vocabulary
3. Terminology
3.1 Definitions—The following terms are relevant to this test method: char length; children’s sleepwear; fabric piece (piece); fabric
production unit (unit); flame retardant; flame retardant treated; flammability; flammable textile; garment production unit (unit);
infant garment; item.
3.2 For terms related to the burning behavior of textiles, see Terminology D4391.
3.3 For terminology related to fire issues other than burning behavior of textiles, see Terminology E176 and ISO 13943. In case
of conflict, the terminology in E176 will prevail.
3.4 For definitions of other terms used in this test method, refer to terminology terms related to laundering and drycleaning, see
Terminology in the referenced AATCC test methods.Manual of International Test Methods and Procedures and M11.
3.5 For other terms related to textiles, see Terminology D123. and AATCC M11.
4. Summary of Test Method
4.1 This test method evaluates the extent of vertical flame spread of a textile after a flame is applied to the bottom edge of the
specimen. The specimen is oriented vertically during the test and is exposed to a 38-mm 38 mm (1.5-in.) flame for 3 s.
4.2 The extent of flame spread is determined by measuring the distance from the lower edge of the specimen to the point at which
the specimen ceases to tear when subjected to a specified tearing load.
5. Significance and Use
5.1 This test method is suitable for evaluating flammability characteristics and laundering durability of textiles used in the
manufacture of children’s sleepwear. It is not suitable for evaluating the flammability characteristics of textiles for other product
applications or ignition scenarios.
Available from American Association of Textile Chemists and Colorists (AATCC), P.O. Box 12215, Research Triangle Park, NC 27709-2215, http://www.aatcc.org.
Reference from the 1970 edition of the manual.
Available from U.S. Government Publishing Office, 732 N. Capitol Street, NW, Washington, DC 20401, http://www.gpo.gov.
Available from National Technical Information Service (NTIS), 5301 Shawnee Rd., Alexandria, VA 22312, http://www.ntis.gov.
Available from International Organization for Standardization (ISO), ISO Central Secretariat, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva, Switzerland,
https://www.iso.org.
D6545 − 22
5.2 The procedure for flammability testing used in this test method is technically equivalent to those used in 16 CFR 1615 and
1616. This test method does not include detailed specimen sampling plans, or the regulatory and record keeping requirements cited
in the federal regulations. Please consult 16 CFR 1615 and 1616 for information for these operations.
5.3 This test method is suitable for training technicians to conduct the federal test and can serve as a laboratory reference.
5.4 Test Method D6545 is very different from 16 CFR 1610 and from Test Method D1230.
6. Apparatus and Materials
6.1 Test Chamber—The test chamber shall be constructed of a steel or stainless steel cabinet with inside dimensions of 32.9 cm
6 0.15 cm (12.94 in. 6 0.06 in.) wide, 32.9 cm 6 0.15 cm (12.94 in. 6 0.06 in.) deep, and 76.2 cm 6 0.15 cm (30 in. 6 0.06
in.) high. The cabinet shall have a frame, perpendicular to the front of the cabinet, which permits the suspension of the specimen
holder over the center of the base of the cabinet at such a height that the bottom of the specimen holder is 1.9 cm 6 0.15 cm (0.75
in. 6 0.06 in.) above the highest point of the barrel of the gas burner. The front of the cabinet shall be a close-fitting door with
a glass insert to permit observation of the entire test. The inside rear vertical surface of the cabinet will be painted flat black to
improve visibility of the burning specimen during the test. The cabinet floor can be covered with a piece of noncombustible paper,
fabric, or film whose length and width are approximately 2.5 cm (1 in.) less than the cabinet floor dimensions. The cabinet to be
used in this test method is illustrated in Fig. 1 and detailed in Figs. 1-4. A suitable flame height indicator is shown in Fig. 5.
FIG. 1 Test Apparatus
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FIG. 2 Front View
6.2 Specimen Holder, n—The specimen holder is designed to permit suspension of the specimen in a fixed vertical position and
to prevent curling of the specimen when the flame is applied. It shall consist of two U-shaped 0.19 cm (0.074 in.; 14-gauge USS)
thick steel or stainless steel plates, 42.2 cm 6 0.15 cm (16.62 in. 6 0.06 in.) long, and 8.9 cm 6 0.15 cm (3.5 in. 6 0.06 in.) wide,
with aligning pins. The openings in the plates shall be 35.6 cm (14 in. 6 0.06 in.) long and 5.1 cm 6 0.15 cm (2 in. 6 0.06 in.)
wide. The specimen is fixed between the plates, which shall be held together with side clamps. The holder to be used in this test
method is illustrated in Fig. 6.
6.3 Burner, n—The burner is substantially the same as that illustrated in Figs. 7 and 8. The burner will have the inside tube
diameter of 1.1 cm (0.437 in.). The input line to the burner shall be equipped with a needle valve to provide a variable orifice to
D6545 − 22
FIG. 3 Top View
adjust the height of the flame. The barrel of the burner is positioned at an angle of 25° from the vertical. The burner is equipped
with an adjustable stop collar so that it is quickly located correctly under the test specimen. The burner is connected to the gas
source by rubber or other flexible tubing.
6.4 Gas Supply System, n—A pressure regulator to furnish gas to the burner will deliver a pressure of 129 mm 6 13 mm Hg (2 ⁄2
2 2
lb/in. 6 ⁄4 lb/in. ) at the burner inlet.
6.5 Gas, n—The gas is at least 97 % pure methane.
6.6 Hooks and Weights, n—Metal hooks and weights are used to produce a series of loads for char length determinations. Suitable
metal hooks consist of 1.1-mm 1.1 mm (0.043-in.; No. 19 gauge) diameter steel or stainless steel wire, or equivalent, made from
7.6-cm 7.6 cm (3-in.) lengths of the wire, bent 1.3 cm (0.5 in.) from one end to a 45° angle hook. The longer end of the wire is
fastened around the neck of the weight to be used and the other in the lower end of each burned specimen to one side of the burned
area. The requisite loads are given in Table 1.
6.7 Stopwatch—A stopwatch or similar timing device is used to measure time to 0.1 s.
6.8 Scale—A linear scale graduated in millimetres or 0.1-in. divisions is used to measure char length.
6.9 Circulating Air Oven—A forced-circulation drying oven capable of maintaining the specimens at 105105 °C 6 2.8 °C
(221(221 °F 6 5 °F), is used to dry the specimen while mounted in the specimen holders.
6.10 Desiccator—An airtight and moisture-tight desiccating chamber is used for cooling mounted specimens after drying.
Anhydrous silica gel will be used as the desiccant.
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FIG. 4 Left-Side View (Left-Side Panel Removed)
6.11 Hood—A hood or other suita
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