Paper machine press section is a crucial step in the papermaking process, connecting the initial and subsequent steps. It dehydrates the paper through mechanical pressure, which significantly improves the strength and surface properties of the paper sheet, but also leads to structural changes such as reduced bulk.

 

The Influence of Paper Machine Press Section on Paper Structure and Properties

 

1. Paper machine pressing flattens the fibers and causes permanent deformation, reducing paper thickness.

2. Pressing brings the fibers into close contact, significantly increasing the bonding area between fibers and promoting hydrogen bond formation.

3. Paper machine pressing eliminates wire marks and improves paper smoothness.

4. Pressing can cause paper two-sidedness, i.e., differences in properties between the front and back sides.

 

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