Blue discoloration/pink discoloration appears in foam products during use

White or light-colored foam gradually turns blue or pink during storage or use. This problem is relatively common in foam molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Environmental condition aspect: Amine catalysts and antioxidants undergo color-forming reactions with nitrogen oxides (NOx) (usually from smoke environments or corona discharge), The production environment affects the stability of materials and processes. (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) Material selection: Use catalysts that do not contain aromatic amines, Establish material selection evaluation criteria, and determine the optimal solution through comparative tests. (2) Formulation optimization: Add anti-gas-fading yellowing agents, Determine the optimal addition amount through small-batch tests, and verify the effect on the overall performance of the product. (3) Implementation measure: Product packaging isolates NOx sources., Develop a specific operation plan based on actual production conditions, and verify the implementation effect. (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.