Production Process Of Glass Fiber Board

In the epoxy resin fiberglass board, FR-4 glass fiber board has always maintained its absolute advantage and dominant position, occupying most of the middle and high-end market. The main reason is that FR-4 integrates various industrial performances. And it has high flame retardancy, so it is favored by the market.
FR-4 resin glue
(1) Resin glue formula In the epoxy resin glass fiber board industry, FR-4 glass fiber board has been produced for many years, and the resin glue formula is basically the same.
(2) Preparation method: 1) Dimethylformamide and ethylene glycol methyl ether are stirred and mixed to form a mixed solvent. 2) Add dicyandiamide and stir to dissolve. 3) Add epoxy resin and stir to combine. 4) 2-methylimidazole is pre-dissolved in an appropriate amount of dimethylformamide, and then added to the above materials, and continue to stir fully. 5) After parking (curing) for 8 hours, take samples to test the relevant technical requirements.
(3) Technical requirements for resin glue: 1) The solid content is 65% to 70%. 2) Gel time (171°C) 200-250s.
Adhesive sheet
Manufacturing process After the glass fiber cloth is unrolled, it passes through the guide roller and enters the glue tank. After dipping, it passes through extrusion rollers to control the resin content, and then enters the oven. During the oven, the solvent and other volatiles are removed, while the resin is in a semi-cured state. After leaving the oven, cut according to the size requirements, and neatly stacked on the storage rack. Adjust the gap between extrusion rollers to control the resin content. Adjust the temperature, air volume and vehicle speed of each temperature zone of the oven to control the gel time and volatile matter content.