Process for producing reactive, homogeneous, self-bondable lignocellulose fibers
AssigneeCrown Zellerbach Corporation
InventorsDavid W. Goheen, John S. Barton
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Abstract
A novel process for producing reactive, homogeneous, self-bondable lignocellulose fibers is provided in which individual, separate, lignocellulose fibers are oxidatively modified, employing oxidative reagent system. Pursuant to the teachings of the present invention, the oxidative modification step is conducted in a controlled manner, for example, employing a confrication step, using a liquid-phase reagent system, the subject product fibers, prior to sheet formation, being substantially free of residual oxidative reagent. Sheets are formed from the product fibers on subsequent bonding, employing mild formation conditions, the sheets having improved dry- and wet-strength properties.
Claims29
A process for producing reactive, homogeneous, self-bondable, lignocellulosic fibers, capable of subsequently being bonded to form sheet products having improved wet- and dry-strength properties, which comprises subjecting individual, separate fibers of lignocellulose to a controled oxidative modification step, including a confrication step, which includes contacting said individual, separate fibers with an oxidative reagent system in an amount sufficient to effectively produce said reactive, homogeneous, self-bondable, lignocellulosic fibers.
A process of forming homogeneous, self-bondable, lignocellulosic fibers, capable of subsequently being bonded to form sheet products having improved wet- and dry-strength properties, which comprises:
- a. introducing lignocellulose, at high consistency, and an oxidative reagent system into a work space formed within a high energy reactor between a pair of rotatable discs, said discs including means for confricating said high-consistency cellulose in the presence of said oxidative reagent system;
- and
- b. subjecting said lignocellulose to a controled oxidative modification step, including confricating said cellulose and oxidative reagent system, respectively, to a degree sufficient to form said homogeneous, self-bondable, lignocellulosic fibers.
Dependencies are inferred from the claim text.