The procedures in these test methods should be used with caution for acceptance of commercial shipments owing to the absence of factual information on the between-laboratory precision of many of the test procedures included in these test methods. It is recommended that any program of acceptance testing be preceded by an interlaboratory check in the laboratory of the purchaser and the laboratory of the supplier on replicate specimens of the materials to be tested for each property (or properties) to be evaluated.

If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, test samples should be used that are as homogeneous as possible, that are drawn from the material from which the disparate test results were obtained, and that are randomly assigned in equal numbers to each laboratory for testing. Other materials with established test values may be used for this purpose. The test results from the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results must be adjusted in consideration of the known bias.

The significance and use of particular properties are discussed in the appropriate sections of specific test methods.

1. Scope

1.1 These test methods cover the testing of industrial filament yarns made wholly of manufactured organic-base fibers, cords twisted from such yarns, fabrics woven from such cords, and products that are made specifically for use in the manufacture of pneumatic tires. They may be applied to similar yarns and cords used for reinforcing other rubber goods and for other industrial applications. The test methods apply to nylon, polyester, and rayon yarns and tire cords twisted from such yarns and to fabrics made from such cords. The yarn or cord may be wound on cones, tubes, bobbins, spools, or beams; may be woven into fabric; or may be in some other form. The methods include testing procedure only and include no specifications or tolerances.

1.2 No procedure is included for the determination of fatigue resistance of cord, but several commonly used procedures for the measurement of fatigue resistance of cords in rubber were published in the appendix of these test methods in the 1967 Annual Book of ASTM Standards, Part 24, and in earlier issues of Test Methods D885.

1.3 The sections on “Growth of Conditioned Yarns and Cords,” “Properties of Yarns and Cords at Elevated Temperature,” and “Properties of Wet Yarns and Cords” have been moved to Appendix X1-Appendix X3 as non-mandatory informational items because of their very limited use by the industry and because precision and bias statements are not included.

1.4 This standard includes the following sections:

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

D76 Specification for Tensile Testing Machines for Textiles

D123 Terminology Relating to Textiles

D276 Test Methods for Identification of Fibers in Textiles

D1423 Test Method for Twist in Yarns by Direct-Counting

D1776 Practice for Conditioning and Testing Textiles

D1777 Test Method for Thickness of Textile Materials

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

D1909 Standard Table of Commercial Moisture Regains for Textile Fibers

D2257 Test Method for Extractable Matter in Textiles

D2258 Practice for Sampling Yarn for Testing

D2462 Test Method for Moisture in Wool by Distillation With Toluene

D2494 Test Method for Commercial Mass of a Shipment of Yarn or Manufactured Staple Fiber or Tow

D2654 Test Method for Moisture in Textiles

D3774 Test Method for Width of Textile Fabric

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

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

D4393 Test Method for Strap Peel Adhesion of Reinforcing Cords or Fabrics to Rubber Compounds

D4776 Test Method for Adhesion of Tire Cords and Other Reinforcing Cords to Rubber Compounds by H-Test Procedure

D4848 Terminology Related to Force, Deformation and Related Properties of Textiles

D6477 Terminology Relating to Tire Cord, Bead Wire, Hose Reinforcing Wire, and Fabrics

Keywords

commercial mass; dip pickup; industrial yarn; linear density; manufactured fibers; moisture regain; shrinkage; tensile properties/tests; tire cord; tire fabric; twist; Breaking strength/tenacity--textile fabrics/fibers; Commercial mass; Density--linear; Diameter--textile fabrics/fibers; Dip pickup (DPU); Elongation--textiles; Man-made textile fibers; Polyester plastics; Rubber adhesion; Shrinkage--textile fabrics/fibers; Tensile properties/testing--textile materials/applications; Thickness--textile fabrics/fibers; Tire cords and tire cord fabrics; Twist--textiles; Wet testing; Work-to-break; Yarn number; Yarn properties--industrial yarns; Modulus; Moisture analysis--textile fabrics/fibers; Mass--commercial mass;

ICS Code

ICS Number Code 83.160.01 (Tyres in general)

Citing ASTM Standards

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