This study evaluates the interaction between the use of debonding agents and optimum refining levels on secondary fiber.The results showed that,while debonding agents decrease the mechanical strength of handsheets by decreasing fiber bonding,optimizing refining levels could compensate for this loss in strength.The increasing use of recycled pulp in papermaking has led to process issues such as increased contamination and stickies,often resulting in reduced paper machine runnability.The finished sheet's mechanical strength and other physical properties also have changed as the trend to replace virgin fiber with recycled pulp continues to grow.
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