Preparation process of graphene modified high-thermal-conductivity cool polyester fiber
By co-blending terminal amino polyamide 6 chips with carboxylated graphene microplates in a twin-screw extruder, and combining this with triphenyl phosphite inactivation and side-blowing cooling, a covalently entangled coating layer is formed. This solves the problems of inorganic phase homogenization and flow stability in the preparation of high thermal conductivity and cool-feel polyester fibers, and achieves high-performance and stable fiber production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENZHEN KORADIOR FASHION LTD
- Filing Date
- 2026-05-29
- Publication Date
- 2026-07-17
AI Technical Summary
In the preparation of high thermal conductivity and cool-feel polyester fibers, conventional mixing processes cannot achieve spatial anchoring control of inorganic phase homogenization and isotropic continuous orientation of matrix macromolecular chain segments. This leads to the inorganic filler being prone to heterogeneous phase interface slippage and melt flow instability during high-temperature and high-pressure processing, resulting in melt fracture.
By blending amino-terminated polyamide 6 chips with carboxyl-terminated graphene microplates and then performing a melt reaction in a twin-screw extruder, the end groups are deactivated by triphenyl phosphite, the shear viscosity ratio is adjusted, and a covalently entangled coating layer is formed by combining side-blowing cooling and stretching processes. This dynamically matches the rheological shear viscosity of the two phases and prevents the melt stream from breaking.
Stable preparation of graphene-modified high thermal conductivity and cool-feel polyester fiber was achieved, avoiding melt fracture, improving the thermodynamic stability and thermal conductivity of the multiphase system, and ensuring continuous extrusion and high performance of the fiber.
Smart Images
Figure CN122406409A_ABST