Finger hole defects appear in porous PTFE sintered membranes

Finger-puncture-like rupture holes appear in expanded PTFE (ePTFE) membranes. 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: During the stretching pore-forming process, excessive local draw ratio causes microfibrils to break and merge into large pores, 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: Control the stretching rate and draw ratio to be uniform and consistent, Establish an online monitoring mechanism, set upper and lower parameter limits, and implement alarm management. (2) Implementation measure: Keep the stretching temperature uniform and stable, Develop a specific operation plan based on actual production conditions, and verify the implementation effect. (3) Formulation adjustment: Reduce the maximum draw ratio., Adjust gradually and verify the effect, ensuring that other performance indicators of the product are not affected. (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.