Curing lag in the core of thick laminated products

The curing time of the core of thick boards is longer than that of the surface, causing delamination. This problem directly affects the mechanical properties and surface quality of the product, and causes entire batches of products to be scrapped in severe cases.

(1) Process factor: poor thermal conductivity of resin; this factor affects the '2079851475616104453 and final quality of the product. (2) Process factor: heat from the hot platen difficult to conduct to the core; this factor affects the '2079851475616104453 and final quality of the product. (3) Formulation aspect: insufficient curing agent or catalyst dosage, ratio deviating from stoichiometry. (4) Process aspect: curing temperature or time insufficient, reaction conversion rate not meeting requirements. (5) Environment aspect: ambient temperature too low or moisture interfering with the curing reaction.

(1) Process optimization: extend hot pressing time to ensure full curing of the core; determine a reasonable time based on product wall thickness and material characteristics, balancing production efficiency and quality. (2) Implementation measures: use low-frequency slow heating to transfer heat slowly; formulate specific operation plans based on actual production conditions and verify implementation effects. (3) Implementation measures: hot press thick boards in multiple stages or open the mold midway to release volatiles., formulate specific operation plans based on actual production conditions and verify implementation effects. (4) Preventive measures: establish a sound process control standard and quality inspection system, and regularly review process data for continuous optimization.

The core of poor curing problems is that chemical reaction conditions do not meet requirements; formulation ratios and curing process parameters need to be precisely controlled.