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Sunday, October 14, 2007

Esterase-type enzymes offer recycled mills an alternative approach to stickies control Pulp & Paper - Find Articles

Esterase-type enzymes offer recycled mills an alternative approach to stickies control Pulp & Paper - Find Articles: "Esterase-type enzymes offer recycled mills an alternative approach to stickies control Pulp & Paper, Feb 2003 by Jones, David R, Fitzhenry, James W ISSUE FOCUS: PAPERMAKING

A new enzyme-based control system breaks macro-stickies into smaller particles that can be removed from the mill process, thus reducing their impact on runnability and paper quality Many North American paper and board mills have to deal with the consequences of using recycled fiber.

One major consequence is dealing with stickies that are a natural component of the recycled fiber used by these mills. Stickies can cause runnability and quality problems, and their variable nature makes them difficult to control.

A new approach to stickies control has been developed that uses esterase-type enzymes to break down the stickies into smaller, less tacky particles.The successful use of these enzymes at three mills is described in this article.

WHAT ARE STICKIES?

Stickies are tacky, hydrophobic, pliable organic materials found in recycled paper systems. They exhibit a broad range of melting points and different degrees of tackiness depending on their composition.

Stickier are composed of a variety of materials including adhesives, styrene-- butadiene latex, rubber, vinyl acrylates, polyisoprene, etc "
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