Quality Certification
Quality management system certified to ISO9001:2015
Our Quality Promise
At Zefeng Thread, quality is not just a goal—it's our foundation. Every spool leaving our factory represents our commitment to excellence and consistency.
Our ISO9001:2015 certified quality management system ensures every product meets international standards. From raw material selection to final packaging, we maintain strict control at every stage.
Quality you can trust. Delivery you can rely on.
Quality Management System Certification
Certificate Number:05324Q30866R1S
GRS Global Recycled Standard Certification
Certificate Number:GCL-302301-GRS-2025
Utility Model Patent Certificate
Certificate Number:ZL 2023 2 0888965.3
Enterprise Intellectual Property Compliance Management System Certification
Certificate Number:25CN06717430IP
Quality Control Process
Raw Material Inspection
All raw materials entering the factory undergo rigorous testing before production to ensure they meet our strict quality standards.
Process Quality Control
Continuous monitoring during production, with regular sampling and inspection at each manufacturing stage.
Final Testing
Comprehensive final inspection, including strength testing, colorfastness verification, and dimensional stability checks.
Certification Compliance
All products are manufactured in accordance with ISO9001:2015 quality management systems and GRS standards.
Device Detection
Our advanced lab is equipped with precision testing instruments to ensure every product meets specifications.
- Tensile Strength Tester
- Color Fastness Tester
- Yarn Counting Device
- Moisture Content Analyzer
- Abrasion Tester
- Elongation Tester