US Pat. No. 10,106,928

PAPER COMPOSITION

FiberLean Technologies Li...

1. A paper product comprising high energy thermomechanical pulp (TMP), low energy TMP, and microfibrillated cellulose, wherein the paper product comprises at least about 30% by weight high energy TMP and low energy and between 0.1% to 5% by weight of said microfibrillated cellulose TMP, based on the total weight of the paper product; wherein the weight ratio of high energy TMP to low energy TMP is from about 55:45 to about 50:50; wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50; wherein the low energy TMP has a Canadian standard freeness of from about 80 to about 130 cm3, and wherein the high energy TMP has a Canadian standard freeness of from 10 to 60 cm3; further wherein the paper product has a Bendtsen porosity of less than about 300 cm3 min?1.

US Pat. No. 10,214,859

PAPER AND PAPERBOARD PRODUCTS

FiberLean Technologies Li...

1. A method of making a paper or board product, the method comprising:(a) providing a wet web of pulp;
(b) providing a top ply slurry onto the wet web of pulp using an applicator suitable to form a film through a non-pressurized or pressurized slot opening on top of a wet substrate on the wire of the wet end of a paper machine, wherein:
the top ply slurry is provided in an amount ranging from 15 g/m2 to 40 g/m2;
(ii) the top ply slurry comprises a sufficient amount of microfibrillated cellulose to obtain a product having a top ply comprising at least about 5 wt. % to about 30 wt. % microfibrillated cellulose, based on the total weight of the top ply; and
(iii) the top ply slurry comprises a sufficient amount of inorganic particulate material to obtain a product having a top ply comprising at least 67 wt. % inorganic particulate material, based on the total weight of the top ply, wherein the inorganic particulate material has a particle size distribution in which at least 20 wt. % to at least 95 wt. % of the particles have an equivalent spherical diameter (e.s.d.) of less than 2 ?m.
US Pat. No. 10,100,467

PROCESS FOR THE MANUFACTURE OF STRUCTURED MATERIALS USING NANO-FIBRILLAR CELLULOSE GELS

FiberLean Technologies Li...

1. A process for manufacturing a structured material comprising the steps of:(a) providing cellulose fibres;
(b) providing at least one filler comprising calcium carbonate;
(c) combining the cellulose fibres of step a) and the at least one filler of step b) at a weight ratio of fibres to filler on a dry weight basis of from 1:33 to 10:1;
(d) fibrillating the cellulose fibres in an aqueous environment in the presence of the at least one filler from step c) until a nano-fibrillar gel is formed; wherein the formation of the gel is verified by monitoring the viscosity of the mixture in dependence of the shearing rate, wherein the viscosity decrease of the mixture upon step-wise increase of the shearing rate is larger than the corresponding viscosity increase upon subsequent step-wise reduction of the shearing rate over at least part of the shear rate range as shearing approaches zero;
(e) providing additional non-fibrillated fibres in the form of a fibre web;
(f) combining the nano-fibrillar gel of step d) with the non-fibrillated fibres in the form of a fibre web of step e), so that the combination of the nano-fibrillar gel and the non-fibrillated fibres includes 0.5 to 20 wt. % of the nano-fibrillar gel, expressed by the cellulosic content of the nano-fibrillar gel, on a dry/dry basis; and
(g) manufacturing a structured material from the combination of the nano-fibrillar gel and non-fibrillated fibres in the form of a fibre web.

US Pat. No. 10,100,464

PAPER FILLER COMPOSITION

FiberLean Technologies Li...

11. A method for preparing an aqueous suspension comprising microfibrillated cellulose, the method comprising:providing a fibrous substrate comprising cellulose, wherein the fibrous substrate comprises cellulose having a Canadian Standard freeness equal to or less than 450 cm3;
microfibrillating the fibrous substrate in an aqueous environment by grinding in the presence of a grinding medium consisting essentially of mullite;
wherein the grinding is performed in a stirred media detritor,
wherein the grinding is carried out in the absence of grindable inorganic particulate material;
wherein the grinding medium is present in an amount of at least about 10% by volume of the aqueous environment, and
wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50.
US Pat. No. 10,053,817

PROCESS FOR THE MANUFACTURE OF STRUCTURED MATERIALS USING NANO-FIBRILLAR CELLULOSE GELS

FiberLean Technologies Li...

1. A process for manufacturing a structured material comprising the steps of:(a) providing cellulose fibres;
(b) providing at least one filler comprising calcium carbonate;
(c) combining the cellulose fibres of step a) and the at least one filler of step b) at a weight ratio of fibres to filler on a dry weight basis of from 1:33 to 10:1;
(d) fibrillating the cellulose fibres in an aqueous environment in the presence of the at least one filler from step c) until a nano-fibrillar cellulose gel is formed; wherein the formation of the gel is verified by monitoring the viscosity of the mixture in dependence of the shearing rate, wherein the viscosity decrease of the mixture upon step-wise increase of the shearing rate is larger than the corresponding viscosity increase upon subsequent step-wise reduction of the shearing rate over at least part of the shear rate range as shearing approaches zero;
(e) providing additional non-fibrillated fibres in the form of a fibre web; wherein before, during or after the addition of further non-fibrillated fibres in the form of a fibre web in step e), but after step d) and before step f), at least one further filler is added, wherein the at least one further filler and/or pigment comprises at least a fraction of particles having a median diameter d50 in the nanometer range;
(f) combining the nano-fibrillar gel of step d) with the non-fibrillated fibres in the form of a fibre web of step e), so that the combination of the nano-fibrillar cellulose gel and the non-fibrillated fibres in the form of a fibre web includes 0.5 to 20 wt. % of the nano-fibrillar cellulose gel, expressed by the cellulosic content of the nano-fibrillar cellulose gel, on a dry/dry basis; and
(g) manufacturing a structured material from the combination of the nano-fibrillar cellulose gel and non-fibrillated fibres in the form of a fibre web.
US Pat. No. 10,253,457

COMPOSITIONS

FiberLean Technologies Li...

1. A paper product comprising a functional paper and a coating comprising at least about 5 wt. % of a co-processed microfibrillated cellulose and inorganic particulate material composition, wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50.