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    ASTM D5446 - 08(2019)

    Standard Practice for Determining Physical Properties of Fabrics, Yarns, and Sewing Thread Used in Inflatable Restraints

    Active Standard ASTM D5446 | Developed by Subcommittee: D13.20

    Book of Standards Volume: 07.02

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    Significance and Use

    5.1 Every ASTM test method listed in 2.1 contains a section describing its particular significance and use. Other test methods listed in 2.1 of this practice may contain sections pertaining to their particular significance and use.

    5.2 The physical testing procedures in this practice can be used in conjunction with lot sampling procedures as a basis for acceptance testing of commercial shipments of inflatable restraint fabrics. They may be used to establish the criteria by which inflatable restraint fabrics will be tested by the supplier to determine whether a lot of material is acceptable for shipment to the purchaser.

    5.3 This practice addresses all the physical properties that describe inflatable restraint fabrics and their commonly used test methods. Unless otherwise specified by agreement of purchaser and supplier, these standard test methods shall constitute the test conditions, procedures, and equipment used to determine the physical properties of fabrics used in inflatable restraints. It is intended to be used as a guideline in establishing a written material specification. The specification or agreement of purchaser and supplier may deviate from the practices described herein when (based on experience) considerations of fabric properties, material handling equipment, or inflatable restraint system design dictate otherwise.

    1. Scope

    1.1 This practice is a listing of the test methods commonly employed in determining the physical properties of fabrics and yarns used in the manufacture of inflatable restraints.

    1.2 Fabrics used in the manufacture of inflatable restraints may be coated or uncoated, and may be comprised of spun yarns, continuous filament yarns, or a combination thereof.

    1.3 Fabrics used in the manufacturer of inflatable restraints may be either flat or one piece woven. For the one-piece woven, follow the sampling section of D5446 and the individual test method.

    1.4 In Section 9, this practice lists is alphabetical order the procedures associated with conducting physical testing of the following fabric or yarn properties of concern to the design and manufacture of inflatable restraints.




    Denier (Yarn Number)



    Fiber Content



    Finish (Extractable Material)



    Strength and Elongation








    Air Permeability



    Abrasion Resistance






    Bow and Skew



    Breaking Force & Elongation



    Burst Strength



    Coating Adhesion



    Coating Weight



    Count of Woven Fabric



    Dynamic Air Permeability



    Edgecomb Resistance






    Fogging (Volatility)






    Mass per Unit Area



    Non-Fibrous Material















    Tear Strength






    Warp Size Content & Residual Sizing






    Sewing Thread


    1.5 This practice may be used in conjunction with Practice D5427 which prescribes standard practices for the accelerated aging of inflatable restraint fabrics when comparative results of physical properties before and after accelerated aging are required.

    1.6 Procedures and apparatus other than those stated in this practice may be used by agreement of purchaser and supplier with the specific deviations from the standard practice acknowledged in the report.

    1.7 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other.

    1.8 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 practices and determine the applicability of regulatory limitations prior to use.See Note 3.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D123 Terminology Relating to Textiles

    D204 Test Methods for Sewing Threads

    D276 Test Methods for Identification of Fibers in Textiles

    D737 Test Method for Air Permeability of Textile Fabrics

    D751 Test Methods for Coated Fabrics

    D1059 Test Method for Yarn Number Based on Short-Length Specimens

    D1388 Test Method for Stiffness of Fabrics

    D1422/D1422M Test Method for Twist in Single Spun Yarns by the Untwist-Retwist Method

    D1423 Test Method for Twist in Yarns by Direct-Counting

    D1424 Test Method for Tearing Strength of Fabrics by Falling-Pendulum (Elmendorf-Type) Apparatus

    D1777 Test Method for Thickness of Textile Materials

    D1907 Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method

    D2256 Test Method for Tensile Properties of Yarns by the Single-Strand Method

    D2257 Test Method for Extractable Matter in Textiles

    D2261 Test Method for Tearing Strength of Fabrics by the Tongue (Single Rip) Procedure (Constant-Rate-of-Extension Tensile Testing Machine)

    D3773 Test Methods for Length of Woven Fabric

    D3774 Test Method for Width of Textile Fabric

    D3775 Test Method for End (Warp) and Pick (Filling) Count of Woven Fabrics

    D3776 Test Methods for Mass Per Unit Area (Weight) of Fabric

    D3786 Test Method for Bursting Strength of Textile FabricsDiaphragm Bursting Strength Tester Method

    D3882 Test Method for Bow and Skew in Woven and Knitted Fabrics

    D3990 Terminology Relating to Fabric Defects

    D4032 Test Method for Stiffness of Fabric by the Circular Bend Procedure

    D4157 Test Method for Abrasion Resistance of Textile Fabrics (Oscillatory Cylinder Method)

    D4851 Test Methods for Coated and Laminated Fabrics for Architectural Use

    D5034 Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab Test)

    D5427 Practice for Accelerated Aging of Inflatable Restraint Fabrics

    D5587 Test Method for Tearing Strength of Fabrics by Trapezoid Procedure

    D6476 Test Method for Determining Dynamic Air Permeability of Inflatable Restraint Fabrics

    D6478 Test Method for Determining Specific Packability of Fabrics Used in Inflatable Restraints

    D6479 Test Method for Determining the Edgecomb Resistance of Woven Fabrics Used in Inflatable Restraints

    D6613 Practice for Determining the Presence of Sizing in Nylon or Polyester Fabric

    D6799 Terminology Relating to Inflatable Restraints

    F778 Methods for Gas Flow Resistance Testing of Filtration Media

    Ford Motor Company Standards

    FLTM BN13-1

    AATCC Methods

    Method 81

    SAE Standards


    J1351 Determination of Odor

    ICS Code

    ICS Number Code 43.040.60 (Bodies and body components); 59.080.30 (Textile fabrics)

    UNSPSC Code

    UNSPSC Code

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D5446-08R19

    Citation Format

    ASTM D5446-08(2019), Standard Practice for Determining Physical Properties of Fabrics, Yarns, and Sewing Thread Used in Inflatable Restraints, ASTM International, West Conshohocken, PA, 2019, www.astm.org

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