MC Nylon Casting Polymerization Fluctuation

MC nylon products show incomplete polymerization or whitening and cracks. This problem is relatively common in casting molding production and requires comprehensive analysis and solution from multiple aspects of materials, processes, and equipment.

(1) In terms of material pretreatment: excessive moisture in caprolactam affects catalyst activity, moisture vaporizes at high temperatures to produce gas or participates in side reactions, causing internal defects in the product. (2) In terms of formula control: inaccurate amounts of catalyst/activator, component ratios deviating from design values lead to abnormal chemical reactions or physical states. (3) In terms of temperature parameters: inappropriate mold temperature affects the polymerization speed, temperature deviation directly affects the physicochemical state of the material and the reaction progress.

(1) Process control: strictly control the caprolactam moisture content to ≤0.03%, establish an online monitoring mechanism, set upper and lower parameter limits, and implement alarm management. (2) Implementation measures: accurately measure the amounts of catalyst and activator, formulate a specific operation plan based on actual production conditions and verify the implementation effect. (3) Implementation measures: keep the mold temperature uniform and stable at 140-160℃., formulate a specific operation plan based on actual production conditions and verify the implementation effect. (4) Preventive measures: establish a complete process control standard and quality inspection system, and regularly review process data for continuous optimization.

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