ASTM D204-02(2021) PDF
Standard Test Methods for Sewing Threads
Standard Test Methods for Sewing Threads
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 13
- Дата публикации:
- 1 июля 2021 г.
- Издание:
- D204
- ICS:
- 59.080.20
SIGNIFICANCE AND USE 4.1 Acceptance Testing—The test methods in Test Methods D204 for the determination of the properties of sewing thread are considered satisfactory for acceptance testing of commercial shipments of sewing thread, unless specified in the individual test method. These test methods are the best available and are used extensively in the trade. 4.1.1 If there are differences of practical significance between reported test results for two laboratories (or more) comparative test should be performed to determine if there is a statistical bias between them using competent statistical assistance. As a minimum, use the samples for such a comparative tests that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, 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 for that material must be adjusted in consideration of the known bias. SCOPE 1.1 These test methods can be used to evaluate sewing threads of any fiber. 1.1.1 The test methods in this standard are intended to evaluate only sewing thread taken from thread holders. 1.2 These test methods only provide for the measurement of sewing thread physical properties. These test methods do not address any other properties that may be important for the satisfactory performance of sewing threads under particular end use conditions. 1.3 These test methods can be used to measure the following properties: Sections Colorfastness to Drycleaning 73 – 83 Colorfastness to Laundering 62 – 72 Colorfastness to Water Migration 84 – 94 Diameter 43 – 50 Length per Thread Holder 34 – 42 Shrinkage, Single Strand 51 – 61 Dry Heat 58.1 Boiling Water 58.2 Strength and Elongation 15 – 21 Single Strand—Conditioned 19.1.1 Single Strand—Wet 19.1.2 Loop Strength 19.2 Knot Strength 19.3 Twist 22 – 27 Twist Balance 28 – 33 Yarn Number 7 – 14 Note 1: For methods covering tests on prepared seams, refer to Test Methods D1683/D1683M and D3940. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.5 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. 1.6 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.
Abstract
Overview
ASTM D204-02(2021): Standard Test Methods for Sewing Threads provides comprehensive procedures for evaluating the physical properties of sewing threads. Developed by ASTM International, this standard is widely used in the textile industry for acceptance testing and quality assurance of sewing threads made from any fiber type. The standard specifies methods to assess key thread characteristics directly from thread holders, ensuring consistent product quality and performance in various textile applications. All test procedures conform to internationally recognized principles, including those outlined by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Key Topics
ASTM D204-02(2021) addresses several important sewing thread testing areas:
- Strength and Elongation: Methods to measure straight breaking force, loop strength, knot strength, and thread elongation, which are critical for evaluating seam durability and thread performance.
- Yarn Number: Procedures to determine yarn count or ticket number, providing insights into thread thickness and suitability for specific fabric weights.
- Twist and Twist Balance: Techniques to evaluate the amount, direction, and balance of twist in threads, factors that influence thread integrity and sewing behavior.
- Thread Diameter: Measurements of thread diameter using thickness gauges or optical instruments, important for needle selection and seam appearance.
- Length per Thread Holder: Methods to establish and verify the length of sewing thread on holders, essential for commerce and inventory accuracy.
- Shrinkage: Evaluation of thread shrinkage after exposure to boiling water or dry heat, which can affect seam puckering and dimensional stability.
- Colorfastness: Tests to determine thread resistance to color change and staining during laundering, drycleaning, and water exposure, supporting assurance of appearance retention.
Applications
ASTM D204-02(2021) is invaluable for a wide range of stakeholders in the textiles and apparel industry, including:
- Manufacturers and Suppliers: Perform acceptance testing of commercial sewing thread shipments to ensure product meets customer and contractual specifications.
- Quality Control Laboratories: Use standardized methods to test thread physical properties, verify product consistency, and troubleshoot production issues.
- Sewing and Apparel Brands: Develop procurement guidelines for sewing thread based on standardized measurements of strength, diameter, colorfastness, and shrinkage.
- Third-Party Testing Labs: Provide impartial testing and certification services for sewing thread evaluation in line with international standards.
- Regulatory Agencies and Trade Organizations: Reference standardized methods to support uniform practices across supply chains and marketplaces.
The standard helps identify and resolve inter-laboratory testing discrepancies using statistically robust comparative testing, ensuring reliable data in product evaluations and compliance.
Related Standards
ASTM D204-02(2021) references and complements numerous other textile testing standards, including:
- ASTM D123: Terminology Relating to Textiles
- ASTM D1422/D1422M: Test Method for Twist in Single Spun Yarns
- ASTM D1683/D1683M: Test Method for Failure in Sewn Seams of Woven Fabrics
- ASTM D1907/D1907M: Test Method for Linear Density of Yarn by the Skein Method
- ASTM D2256/D2256M: Test Method for Tensile Properties of Yarns by the Single-Strand Method
- ASTM D1776/D1776M: Practice for Conditioning and Testing Textiles
- AATCC 135: Dimensional Changes in Automatic Home Laundering
- AATCC Evaluation Procedures: For color change and staining
For seam performance and seam preparation tests, refer to ASTM D1683/D1683M and the withdrawn D3940.
Practical Value
ASTM D204-02(2021) enables accurate, reproducible sewing thread evaluation, ensuring that manufacturers and users select materials fit for purpose. By detailing standard test methods for sewing thread strength, twist, diameter, colorfastness, and shrinkage, the document supports efficient quality assurance, compliance, and product development efforts across the textiles industry. Implementing these methods helps minimize product failures, improve seam quality, and assure customer satisfaction.
Технические детали
- Технический комитет
- D13 - Textiles
- SKU
- ASTM D204-02(2021)
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