一种大丝束PAN预氧化纤维均匀性评价方法
By using the enthalpy dispersion CV0 within the bundle of 12K PAN pre-oxidized fiber as a benchmark, and combining differential scanning calorimetry (DSC) to perform stratified sampling and thermal analysis of large-tow PAN pre-oxidized fiber, the problem of difficulty in evaluating uniformity during the pre-oxidation process of large-tow PAN fiber was solved, and precise process optimization and product quality control were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGHUA UNIV
- Filing Date
- 2026-06-16
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot directly, quantitatively, and precisely characterize the uniformity of the pre-oxidation process of large-tow PAN fibers, resulting in poor process controllability and large fluctuations in product quality. Furthermore, traditional evaluation methods cannot identify local non-uniform areas.
Using the enthalpy dispersion CV0 of 12K PAN pre-oxidized fiber as a benchmark, differential scanning calorimetry (DSC) was used to perform stratified sampling and thermal analysis on large-tow PAN pre-oxidized fibers of 48K and above specifications. The enthalpy dispersion CVn of exothermic heat release within and between bundles was calculated. By comparing CVn with CV0, the uniformity of large-tow PAN pre-oxidized fibers was quantitatively evaluated.
It enables precise quantitative evaluation of the uniformity of large-tow PAN pre-oxidized fibers, accurately locates uneven areas, improves the stability of the production process and the consistency of product quality, reduces the generation of defective products, and improves production efficiency and economic benefits.
Abstract
Citation Information
Patent Citations
Pre-oxidation reaction control method for large-tow PAN precursor
CN114540990A
Method for pre-oxidizing large-tow polyacrylonitrile precursor, pre-oxidized fiber and application
CN118668332A