Overview
ISO 21924-9:2020 - "Martial arts - Protective equipment for martial arts - Part 9: Additional requirements and test methods for Wushu Sanda head protectors" specifies terms, structure, classification, performance requirements and test methods for Wushu Sanda head protectors. It applies to protectors sewn from polyurethane (PU) synthetic leather, polyvinyl chloride (PVC) artificial leather, polyurethane foam padding and similar materials, and includes normative impact test methods (Annex A).
Key topics and technical requirements
- Product scope and structure: Definitions of parts (main body, ear protector, back protector, locking strap, hook-and-loop fastener, top cover) and required dimensions for S, M, L, XL sizes.
- Materials: Approved outer fabrics and linings (PU, PVC, textiles) and polyurethane foam padding.
- Manufacturing and appearance:
- Stitching: continuous lines, 8–10 stitches per 30 mm, no missing or skipped stitches.
- Surface: smooth, symmetric, free of stains and defects; hook-and-loop/locking strap positioned and skewed to avoid injury.
- Safety and chemical limits:
- Formaldehyde: fabric ≤ 300 mg/kg; lining ≤ 75 mg/kg.
- Aromatic amines from azo dyes: fabric/lining ≤ 20 mg/kg.
- pH ranges: PU/PVC 3.5–9.5; textiles 4.0–8.5.
- Physical and mechanical properties:
- Tear strength: PU/PVC > 40 N; textiles > 10 N.
- Abrasion resistance: PU/PVC grade > 4.
- Seam strength (locking strap/fabric): > 140 N/cm.
- Hook-and-loop shear strength: > 7.5 N/cm; peel strength > 1.6 N/cm.
- Padding hardness: 8–10 HA; resilience > 30%; compression set ≤ 15%.
- Impact resistance (finished product): ≤ 1.8 kN with no break, tear or permanent deformation.
- Test methods: Measurement procedures, sewing/appearance inspection, and lab tests for formaldehyde and azo amines per referenced ISO methods (e.g., ISO 17226-1, ISO 14184-1, ISO 17234, ISO 14362 series). Annex A covers impact performance tests.
Applications and who uses it
- Manufacturers and product designers - to design and produce compliant Wushu Sanda head protectors and set production tolerances.
- Quality control and testing laboratories - to verify material safety, mechanical strength and impact performance.
- Sport governing bodies and event organizers - to specify approved protective equipment for competitions.
- Importers, retailers and procurement teams - to evaluate product conformity for international trade.
- Safety regulators and consumer protection agencies - to reference limits for chemical and mechanical safety.
Related standards
ISO 21924-9 references many test-method standards for textiles, leather and foam (e.g., ISO 17226-1, ISO 14184-1, ISO 17234 series, ISO 2439). These provide the detailed laboratory methods for chemical and mechanical tests cited in this part.
Keywords: ISO 21924-9:2020, Wushu Sanda head protectors, martial arts protective equipment, PU synthetic leather, PVC artificial leather, polyurethane foam, test methods, safety requirements, impact resistance.