Insufficient imidization of polyimide (PI) sintered parts

PI sintered parts generate moisture and bubbles during use due to insufficient imidization residues. This problem is relatively common in sintering molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Process factor: Imidization dehydration is incomplete during sintering of the polyamic acid precursor, This factor affects the '2079851475616104453 and final quality of the product. (2) Material aspect: Fluctuations in raw material performance indicators or insufficient pretreatment affect molding quality. (3) Process aspect: Control deviation of key process parameters causes the '2079851475616104453 to deviate from optimal conditions. (4) Equipment aspect: Equipment precision and maintenance status affect the stable execution of process parameters.

(1) Process control: Precisely control the imidization temperature gradient (staged heating to 300-350°C), Establish an online monitoring mechanism, set upper and lower parameter limits, and implement alarm management. (2) Implementation measure: Ensure sufficient time in each stage for complete dehydration, Develop a specific operation plan based on actual production conditions, and verify the implementation effect. (3) Material selection: Use infrared spectroscopy to detect the imidization rate., Establish material selection evaluation criteria, and determine the optimal solution through comparative tests. (4) Preventive measure: Establish sound process control standards and a quality inspection system, and regularly review process data for continuous optimization.

This problem requires comprehensive analysis from multiple dimensions of material, process, equipment, and operation, and should be solved by systematically optimizing process parameters and the quality control system.