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About This Item

 

Full Description

In the process of making corrugated board, there are several steps in the process that require precise applications of pressure between rolls, or consistent gaps between rolls in order to meter precise amounts of adhesive to the flutes. In order for these requirements to be met, rolls have to be parallel to each other and also must be as close to perfectly round as possible.

If a pressure roll is not perfectly round, then as the roll turns against the corrugating roll there will be areas where the pressure applied to the singlefacer web at the rolls' nip point will be lessened. If the pressure is lessened enough, the singlefacer bond can be compromised and, thus, affect board quality. An adjustment to increase pressure to compensate for the problem could lead to another problem-pressure roll cutting of the medium and possibly box failure in compression and/or mullen (burst).
 

Document History

  1. TAPPI TIP 0304-56

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    Total indicated runout and its impact on combined board quality

    • Most Recent
  2. TAPPI TIP 0304-56


    Total Indicated Runout and its Impact on ed Board Quality

    • Historical Version
  3. TAPPI TIP 0304-56


    Total Indicated Runout and its Impact on ed Board Quality

    • Historical Version