Exudation spots appear on phenolic laminates

Dark exudate appears on the surface of phenolic laminates after use. This problem is relatively common in lamination molding production and requires comprehensive analysis and solution from multiple aspects of material, process, and equipment.

(1) Process factor: Incompletely reacted phenol and formaldehyde small molecules slowly migrate to the surface and oxidize and discolor, 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) Parameter adjustment: Increase the curing temperature and curing time to complete the reaction, It is recommended to adjust by 5-10°C each time, while monitoring product quality changes, to avoid new defects caused by excessively high temperature. (2) Implementation measure: Subject the product to long-term post-baking treatment, Develop a specific operation plan based on actual production conditions, and verify the implementation effect. (3) Material selection: Select high-purity phenolic resins with low free phenol., 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.