Systems and methods as disclosed herein automatically provide real-time dosing corrections for an industrial process wherein enzyme blends are applied to natural fibers for pulp/paper production. An initial enzyme blend (e.g., enzymes and supporting formulation components, as relevant) and respective dose rates are selected to be applied based on expected fiber surface substrate characterization, expected fiber quality characterization, the physical conditions of the system being treated, respective characteristics of the initially selected enzyme blend components, etc. Upon application of the initial enzyme blend, online sensors provide real-time feedback data corresponding to measured actual values for the fiber surface substrate characterization and fiber quality characterization. A replacement enzyme blend (enzymes and supporting formulation components) and respective dose rates thereof is dynamically selected based on the feedback data. The enzyme dosing stage can be optimized responsive to product changes and/or variations in fiber sources/blend and/or physical conditions, substantially in real time.

The present invention relates to a process for producing corrugated fiberboard from plies of paper which each have a grammage of 70 to 200 g/m.sup.2 and of which at least one ply of paper is obtained by a process comprising the addition of (A) 0.25 to 5 wt %, based on dry paper stock, of at least one cationic polymer comprising vinylamine units, and (B) 0 to 5 wt %, based on dry paper stock, of at least one polymeric anionic compound,
to a paper stock, draining the paper stock by sheet formation, coating the paper web obtained with (C) 0.1 to 3 wt %, based on dry paper stock, of at least one starch
and drying the coated paper web,
wherein the polymeric anionic compound is selected from a polymeric anionic compound (B1) and a polymeric anionic compound (B2),
wherein said polymeric anionic compound (B1) is obtainable by copolymerizing a monomer mixture comprising, preferably consisting of, (a) at least one monomer (a) selected from acrylamide and an N-vinylcarboxamide of the formula ##STR00001## where R.sup.1 and R.sup.2 are each H or C.sub.1 to C.sub.6 alkyl, (b) at least one acid-functional monoethylenically unsaturated monomer and/or its alkali metal, alkaline earth metal or ammonium salts (b), and (c) optionally one or more monoethylenically unsaturated compounds (c) other than said monomers (a) and (b), and (d) optionally one or more compounds having at least two ethylenically unsaturated double bonds in the molecule,
and said polymeric anionic compound (B2) is the hydrolysis product of said polymeric anionic compound (B1) whose carboxamide moieties have been partly or wholly hydrolyzed into amino groups,
and also the corrugated fiberboard thus obtained and its use in the manufacture of packaging boxes from corrugated fiberboard.

The invention relates to a method and apparatus for continuous manufacture of surface sizing starch, wet-end starch or binder starch in paper, cardboard and chemical pulp industry. The starch slurry is modified as a starch size suitable for the application (6) by exposing the starch slurry to ultra sound in the ultrasonic unit (4, 4a, 4b).

The invention relates to a method and apparatus for continuous manufacture of surface sizing starch, wet-end starch or binder starch in paper, cardboard and chemical pulp industry. The starch slurry is modified as a starch size suitable for the application (6) by exposing the starch slurry to ultra sound in the ultrasonic unit (4, 4a, 4b).

A process for making absorbent towel paper webs comprising the steps of (a) providing a papermaking furnish comprising i) from about 45% to about 90% by weight of the dry fiber basis of the tissue towel paper web of a refined softwood pulp fiber mixture comprising u.) from about 20% to about 89.9% by weight of the dry fiber basis of the absorbent towel paper web of softwood pulp fiber, wherein the softwood pulp fiber is optionally refined before being added to the mixture; v.) from about 0.05% to about 20% by weight of the dry fiber basis of the absorbent towel paper web of cellulose nanofilaments x.) from about 0.05% to about 5.0% by weight of the dry fiber basis of the absorbent towel paper web of strengthening additive, ii) from about 10% to about 55% by weight of the dry fiber basis of the absorbent towel paper web of a hardwood pulp fiber mixture; iii) optionally up to about 20% by weight of the dry fiber basis of the absorbent towel of a fibrillated manmade cellulose; and iv) optionally up to about 20% by weight of the dry fiber basis of the absorbent towel of non-wood natural fibers v) optionally up to about 20% by weight of the dry fiber basis of the absorbent towel of non-cellulosic fibers; and (b) forming a wet fibrous web from said paper making furnish; (c) drying said web until said web contains not more than about 10% by weight moisture.

A process for making absorbent towel paper webs comprising the steps of (a) providing a papermaking furnish comprising i) from about 45% to about 90% by weight of the dry fiber basis of the tissue towel paper web of a refined softwood pulp fiber mixture comprising u.) from about 20% to about 89.9% by weight of the dry fiber basis of the absorbent towel paper web of softwood pulp fiber, wherein the softwood pulp fiber is optionally refined before being added to the mixture; v.) from about 0.05% to about 20% by weight of the dry fiber basis of the absorbent towel paper web of cellulose nanofilaments x.) from about 0.05% to about 5.0% by weight of the dry fiber basis of the absorbent towel paper web of strengthening additive, ii) from about 10% to about 55% by weight of the dry fiber basis of the absorbent towel paper web of a hardwood pulp fiber mixture; iii) optionally up to about 20% by weight of the dry fiber basis of the absorbent towel of a fibrillated manmade cellulose; and iv) optionally up to about 20% by weight of the dry fiber basis of the absorbent towel of non-wood natural fibers v) optionally up to about 20% by weight of the dry fiber basis of the absorbent towel of non-cellulosic fibers; and (b) forming a wet fibrous web from said paper making furnish; (c) drying said web until said web contains not more than about 10% by weight moisture.

The present invention relates to a process for producing corrugated fiberboard from plies of paper which each have a grammage of 70 to 200 g/m.sup.2 and of which at least one ply of paper is obtained by a process comprising the addition of (A) 0.25 to 5 wt %, based on dry paper stock, of at least one cationic polymer comprising vinylamine units, and (B) 0 to 5 wt %, based on dry paper stock, of at least one polymeric anionic compound,

to a paper stock, draining the paper stock by sheet formation, coating the paper web obtained with (C) 0.1 to 3 wt %, based on dry paper stock, of at least one starch

and drying the coated paper web,

wherein the polymeric anionic compound is selected from a polymeric anionic compound (B1) and a polymeric anionic compound (B2),

wherein said polymeric anionic compound (B1) is obtainable by copolymerizing a monomer mixture comprising, preferably consisting of, (a) at least one monomer (a) selected from acrylamide and an N-vinylcarboxamide of the formula

##STR00001## where R.sup.1 and R.sup.2 are each H or C.sub.1 to C.sub.6 alkyl, (b) at least one acid-functional monoethylenically unsaturated monomer and/or its alkali metal, alkaline earth metal or ammonium salts (b), and (c) optionally one or more monoethylenically unsaturated compounds (c) other than said monomers (a) and (b), and (d) optionally one or more compounds having at least two ethylenically unsaturated double bonds in the molecule,

and said polymeric anionic compound (B2) is the hydrolysis product of said polymeric anionic compound (B1) whose carboxamide moieties have been partly or wholly hydrolyzed into amino groups,

and also the corrugated fiberboard thus obtained and its use in the manufacture of packaging boxes from corrugated fiberboard.

A polymer detection probe is provided that includes a binding module that specifically binds to at least one polymer and a reporter module that is spectroscopically detectable. The binding module can be a carbohydrate-binding module (CBM). The reporter module can be a fluorescent protein. A complex is provided that includes a probe specifically bound to a pulp or paper product including at least one surface available lignocellulosic polymer. A pulp or paper product is provided that includes at least one surface available lignocellulosic polymer and at least one probe bound thereto. Methods are provided that employ a lignocellulosic probe. A method of detecting a lignocellulosic polymer or other type of polymer is provided. A method of determining the effectiveness of an industrial treatment on pulp or a paper product is also provided. A method of determining a physical property of pulp or a paper product is further provided.

The present invention relates to a process for producing paper which comprises: (i) providing an aqueous suspension comprising cellulosic fibers, (ii) adding to the suspension after all points of high shear: a first polymer being a cationic polymer having a charge density above 2.5 meq/g; a second polymer; and a third polymer being an organic or inorganic anionic polymer; and (iii) dewatering the obtained suspension to form paper.

Systems and methods as disclosed herein automatically provide real-time dosing corrections for an industrial process wherein enzyme blends are applied to natural fibers for pulp/paper production. An initial enzyme blend (e.g., enzymes and supporting formulation components, as relevant) and respective dose rates are selected to be applied based on expected fiber surface substrate characterization, expected fiber quality characterization, the physical conditions of the system being treated, respective characteristics of the initially selected enzyme blend components, etc. Upon application of the initial enzyme blend, online sensors provide real-time feedback data corresponding to measured actual values for the fiber surface substrate characterization and fiber quality characterization. A replacement enzyme blend (enzymes and supporting formulation components) and respective dose rates thereof is dynamically selected based on the feedback data. The enzyme dosing stage can be optimized responsive to product changes and/or variations in fiber sources/blend and/or physical conditions, substantially in real time.