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11 solutions to the problem of raising paper in the papermaking process

Release time:

Nov 06,2018

11 solutions to the problem of raising paper in the papermaking process:

(1) Temperature of several dryers (check the temperature with a pyrometer)

(2) There are too short fibers in the slurry (requires reduction of fine grinding, research on the possibility of changing raw materials)

(3) Poor bond between fibers (increasing fine grinding and increasing the amount of wet additive)

(4) Check the PH value of white water (adjust if necessary)

(5) Increase the moisture of the web and / or the temperature of the sizing agent to increase the size press (improve the starch solid content)

(6) The moisture of the paper web is too high when entering the pressing or drying section (increasing the wet end pressing, minimizing the moisture of the wet paper web, if possible, reducing the fine grinding and reducing the speed)

(7) Check the ash (lower ash if other conditions permit; high ash will cause fuzzing)

(8) Identify and remove aggregates on the dry web and rollers

(9) Raising is usually related to the depth of the fiber entering the forming fabric (excessive dewatering at the beginning of the forming will cause the ends of the fibers to stand upright and be inserted into the forming fabric)

(10) Excessive dehydration without sufficient turbulence will result in the sealing of the web (this will result in the need for a higher degree of vacuum to pry the fibers from the wet web and into the forming fabric)

(11) Maintain the headbox water level to achieve the theoretical pulp-to-network speed ratio (use a lower spray angle to reduce fluffing and falling powder)