Recently, JIANGSU FEELING FILAMENT SCIENCE AND TECHNOLOGY CO.,LTD(hereinafter referred to as "our company") has made another major breakthrough in the field of functional fiber! The "Polyester Fiber 3D and 7D mixed Filling Technology" jointly developed by our company and Target has been officially authorized by the United States Patent and Trademark Office (USPTO), with patent number US012584253B2.
The successful acquisition of this patent not only confirms our company's international authoritative certification in the field of fine denier fiber blending technology, but also lays a solid foundation for deepening strategic cooperation with Target and officially integrating into its global supply chain system.
This joint research and development breakthrough traditional improvement ideas, relying on scientific experiments to complete the development of new composite filling materials, taking into account multiple core properties and achieving material optimization.
In our collaboration, we broke away from the Six Sigma incremental improvement model and conducted disruptive optimization of design tools. The 3D fiber has a fine texture and excellent fluffiness performance, while the 7D fiber has outstanding rebound and support capabilities, and is not easily collapsed after long-term use. To integrate the advantages of two types of fibers, we did not adopt a simple blending method, but instead conducted systematic research and development using Six Sigma design methodology. The technical team consulted a large amount of literature and data analysis to develop a rigorous experimental plan. They completed over 90 sets of experiments in a high-temperature environment, derived regression equations through calculations, and sorted out precise calculation formulas that affect fluffiness, support, and resilience. Finally, they determined the golden ratio of 3D and 7D regenerated 3D hollow polyester fibers, creating a unique mixed filling structure.
This new type of filling material composed of multi denier polyester fibers has significant advantages compared to single denier fiber filling materials: when used to fill soft shells, it can reduce at least 6% of the filling amount while ensuring the consistency of product height specifications and appearance, greatly improving overall benefits.
3D fibers (3Denier) are like high rebound micro springs, bringing excellent fluffiness and soft texture to the filling layer; 7D fiber (7Denier) serves as a supporting skeleton, stabilizing the overall structure and effectively avoiding collapse during use. After the combination of the two, the 7D fibers bear the main pressure under compression, while the 3D fibers maintain a fluffy shape in the fiber gaps, ultimately forming a gradient support structure with outer flexibility and inner toughness.
Under the same support strength, the 3D/7D composite hybrid structure has a higher space utilization rate. This technology can reduce the weight of filling while maintaining or even improving support performance, which can help downstream brands reduce product weight and logistics costs, and also meet consumers' demand for lightweight and full product usage.
A good news from our partners has marked a successful milestone in our efforts. Recently, the technology we jointly developed with Target has officially obtained US patent authorization (patent number: US012584253B2, authorization date: March 24, 2026).
Looking back on this journey, from the repeated polishing of technical details to the collaborative cooperation in the experimental process, the professionalism and reliability of our partners have always been our confidence on the road ahead. This patent is not only a recognition of technology, but also the best witness to the trust and understanding between both parties. In the future, we look forward to working together with partners to go further on the road of technological innovation and create more surprises.
