Accelerated "aging yellowing" of polystyrene foam (EPS)

EPS boards turn yellow and brittle after several years of exposure. This problem is relatively common in foam molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Material stability aspect: Residual styrene monomer photo-oxidation triggers chain degradation, Molecular chain scission causes an irreversible decline in material properties. (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: Select EPS raw materials with low residual monomer content, Establish material selection evaluation criteria, and determine the optimal solution through comparative tests. (2) Implementation measure: Apply an anti-oxidation coating on the product surface, Develop a specific operation plan based on actual production conditions, and verify the implementation effect. (3) Implementation measure: Store in a light-proof environment., 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.