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The application of screen changers (also called screen changer filters) in extrusion plastic production lines mainly reflects four advantages, which is also the value of the product.

Increasing the back pressure of the die head is conducive to removing water vapor and volatiles in the raw materials, and improving the qualified rate of the product.
Selecting special screen changer equipment according to the filtration of different materials is conducive to increasing filtration efficiency and improving production capacity.

Filter out impurities in raw materials and improve product quality.

Increasing the back pressure of the die head greatly improves the plasticization and homogenization effect of raw materials, making the product texture more uniform, the finish better, and the pressure resistance value of the product will increase. This is also the reason why new raw materials without impurities are equipped with screen changers.

Changing the rheological behavior of the material from rotating flow to linear flow, avoiding the appearance of "winding lines" in the product. The porous plate and the filter screen have the function of "damping" at the same time, making the cross-sectional flow rate of the entire melt as consistent as possible, avoiding the occurrence of "polymer orientation" and laminar flow, increasing the longitudinal strength of the product and reducing the transverse strength, thereby affecting the quality of the product, because the flow rate of the melt ring wall is very different from the flow rate in the middle.