Overview
ISO 10132:1993 - Textiles - Textured filament yarn - Definitions establishes a concise, standardized vocabulary for the characteristics of textured filament yarns. Published in 1993 by ISO (prepared by ISO/TC 38, Subcommittee SC 5, Yarn testing), the standard defines 14 terms used in testing, specification and reporting of textured yarn properties. Clear, consistent terminology helps textile manufacturers, testing laboratories and specifiers communicate results and requirements for textured filament yarns.
Key Topics
The standard lists and defines 14 core characteristics of textured filament yarns. Important keywords and concepts covered include:
- Bulk (voluminosity): Volume per unit mass of a yarn measured under standardized conditions.
- Covering power: The degree to which a yarn imparts cover to a fabric.
- Crimp: Waviness of a textured filament yarn; may be quantified by crimp elongation.
- Crimp contraction: Length contraction resulting from development of crimp, expressed as a percentage of original length.
- Crimp elongation: Length increase when a yarn is straightened after development of crimp, expressed relative to straightened length.
- Crimp frequency: Number of crimps per unit length (methods differ-half/whole waves, straightened/unstraightened length bases).
- Crimp liveliness: Tendency to redevelop crimp after reduction of applied tension.
- Crimp recovery: Ability to recover original crimped length after tension.
- Crimp rigidity: Ability to retain crimp after stretch; related to bulking potential.
- Crimp stability: Ratio of crimp levels before and after standardized mechanical treatment.
- Latent crimp: Crimp that can be revealed by thermal treatment or tensioning-relaxation.
- Percentage crimp: Difference between straightened and crimped lengths, as percentage of straightened length.
- Shrinkage: Length decrease of a textured yarn after a specified treatment, expressed as percentage of untreated sample length.
- Twist liveliness: Tendency of a torsion-textured yarn to resume its twisted shape.
Note: Many definitions specify that lengths or measurements are taken “under prescribed tensions” or using defined measurement bases - consistent test conditions are implied.
Applications
ISO 10132:1993 is practical for:
- Textile test laboratories for consistent reporting of yarn test results.
- Quality assurance teams specifying textured filament yarn properties in contracts and datasheets.
- Yarn and fabric manufacturers for R&D and process control (e.g., texturizing, heat-setting).
- Procurement and product development teams comparing supplier data and ensuring conformity.
Using standard terminology reduces ambiguity in specifications, improves comparability of test data, and supports regulatory and commercial documentation.
Related
- Prepared by ISO/TC 38, Textiles - Subcommittee SC 5 (Yarn testing).
- Use alongside other ISO textile and yarn testing standards for complete test methods and procedures.