Wood Pulp Paper for PCB Board Impregnation Line

Wood Pulp Paper Impregnation Line

The large scale horizontal impregnating and coating line is used to make impregnated fiberglass colth which is one kind of base material of CCL/FR-4.

This production line is a key specialized equipment for manufacturing the core material of printed circuit boards (PCB) - copper-clad laminate (CCL/FR-4). It is mainly used to uniformly impregnate epoxy resin into electronic-grade glass fiber cloth, then dry and pre-cure to form a semi-cured sheet (PP sheet), providing the core insulating adhesive material for the subsequent hot pressing molding of copper-clad boards.

Equipment Usage of Wood Pulp Paper Impregnation Line

Production of semi-cured sheets (PP) for FR-4, high Tg, halogen-free, high-frequency and high-speed series of copper-clad laminates

Compatible with glass fiber fabric specifications: 106, 1080, 2116, 3313, 7628, etc.

Widely used in consumer electronics, 5G communication, automotive electronics, industrial control, server PCB substrates.

Production Process of Wood Pulp Paper Impregnation Line

(1) Automatic unwinding: Dual station non-sprocket unwinding, automatic paper feeding, constant tension control.

(2) Precise impregnation: Suction of the gel tank + controlled gluing by metering rollers, ensuring uniform and stable gel content.

(3) Gradient drying: Multi-zone hot air oven, evaporation of solvents, pre-curing to B stage.

(4) Cooling and shaping: Rapid cooling, stable size and performance.

(5) Online inspection: Thickness measurement, gel content, gelation time, appearance defect monitoring.

(6) Rolling / Cutting: Automatic deviation correction for rolling or fixed-length cutting, producing PP sheets.