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TAPPI T 278 Rejects

Standard:

TAPPI

Method:

TAPPI T 278

Title:

Pulp screening (Valley-type screening device)

Scope

TAPPI T 278 provides a laboratory screening procedure for pulps taken directly from a blow pit or discharged from digesters, eliminating time lapse and assuring uniform pulp properties. This practice describes a method for separating debris from virgin or recycled pulps.

Significance

Prior to forming test handsheets, it is necessary to remove debris from pulp fibers for evaluating the physical properties of the pulp. Separating impurities and contaminants from pulp fibers is the first step for analysis on the debris in the pulp, either qualitatively or quantitatively, or both. Shives, knots and chops are typical impurities found in virgin pulps and separated with a laboratory screen. Stickies, hot melts, and plastics are typical contaminants found in recycled pulps and separated with the screen.

 

Please note:
IPS cannot sell or otherwise provide standards, specifications, or test procedures to third parties.