The epoxy board is made by heat-pressing the reinforcing material and the epoxy resin at a high temperature, and the main steps are heating, pressurizing, solidifying, cooling, demoulding, and the like. Regarding the lamination process of epoxy board, Weibang Xiaobian has already been arranged for everyone, please refer to the article “Epoxy board lamination process”. This article is about the reinforcement process of epoxy board.
Preheating stage:The epoxy board is placed in a hot press and heat-pressed at a temperature of about 120 ° C for 30 minutes to fully fuse the epoxy resin and the reinforcing material, and also to cause the volatiles to overflow. This step is very critical. If the time is too short, the temperature is too low to cause bubbles. If the temperature is too high, the billet will slip out.
Hot press forming stage: At this stage, temperature, time and pressure will have a direct impact on the final product. These factors will also change depending on the material. For example, when the epoxy phenolic laminate is used, the temperature is set to about 170 ° C, and when the epoxy silicone glass cloth is used, the temperature is set to about 200 ° C. If the board is thin, but when the hot pressing temperature is lowered.
Cooling demoulding: After pressing, the epoxy board is placed in cold water for a period of time between half an hour and one hour. During the period, attention should be paid to the change of internal stress. Excessive thermal expansion and contraction will cause the laminate to warp and deform.
Post-treatment: This step is to make the performance of the epoxy board more superior. For example, the produced board is placed in an oven for heat treatment to eliminate residual internal stress.
The curing process of epoxy board is mainly in the above stages. After reading this article, I believe you must understand it. Where can I buy cheap and good quality epoxy boards? ZTELEC GROUP has been established for more than ten years, specializing in the production of FR-4, 3240, G10 material and other specifications of epoxy board, providing free proofing services, welcome to order.