Board foam has air channels

Board foam has air channels

In the production process of XPS, EPS, and PET foam board, the appearance of air channels in extruded boards is a common issue we encounter. For this, we have provided corresponding solutions for different causes.

1. The master batch materials contain impurities and are not pure enough: Select raw materials that meet the specified parameters.

2. The temperature of Host Machine No. 2 (single screw) is too low: Adjust to the suitable temperature according to the extrusion board parameters to increase plasticization effect.

3. Excessive injection of carbon oxide or an oversized nozzle can also cause gas channels: Reduce the injection of carbon dioxide or tighten the nozzle screws.