Clean version of the Abstract A preparation method of a heat-not-burn cigarette paper with boron nitride as a thermally-conductive filler incl tides: mixing po .ssiuxr oleate, polyvinyl alcohol (PVA) and water, thoroughly stirring under an ultrasonic condition, aging, and filtering until there is no precipitate; thoroughly mixing a resulting mixed solution with a softwood pulp and a hardwood. pulp to obtain a coarse pulp; and under stirring, adding boron nitride and calcium carbonate as a filler to the coarse pulp, heating to 60° C., and stirring for thorough mixing to obtain a pulp for sizing and papermaking. The present disclosure effectively improves the stability of a cigarette paper by improving a coefficient of thermal conductivity of the paper. Boron nitride, when used as a thermally-conductive filler in a thin-walled or paper product, enables high heat removal capacity. The preparation method retains the original whiteness and transparency of the cigarette paper, and provides high conductivity.

Methods of preparing partially dried or essentially completely dried compositions comprising microfibrillated cellulose and an inorganic particulate material may include microfibrillating a fibrous substrate comprising cellulose in an aqueous environment by grinding in the presence of an inorganic particulate material to form an aqueous composition comprising microfibrillated cellulose and inorganic particulate material, wherein the fibrous substrate comprising cellulose has a Canadian Standard freeness equal to or less than 450 cm, wherein the fibrous substrate to the inorganic particulate material are in a ratio of about 99.5:0.5 to about 0.5:99.5, and wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50; by treating the aqueous composition comprising microfibrillated cellulose and inorganic particulate material to remove at least a portion or substantially all of the water of the aqueous composition to form a partially dried or essentially completely dried composition comprising microfibrillated cellulose and inorganic particulate material.

The present invention provides an aramid nanofiber (ANF)-based insulation paper and a preparation method thereof, and relates to the technical field of composite insulation material. The ANF-based insulation paper provided in the present invention includes ANFs and inorganic insulation materials. The ANFs have a bifurcated geometry and form a three-dimensional network structure, and the inorganic insulation materials are distributed in the three-dimensional network structure. The ANF paper provided in the present invention, with optimal electrical and mechanical properties and excellent insulation and flame-resistance, can replace mica tapes, aramid papers and aramid mica papers on the current market for insulation, and thus the thickness for insulation can be reduced. The present invention provides a method for preparing the ANF-based insulation paper. The preparation method provided in the present invention is simple, has excellent operability, and can be used for continuous preparation, thereby facilitating the realization of industrial production.

A biodegradable board having a high stiffness to weight ratio includes cocoa shell particles, cellulosic wood-based fibers, and no added binders. The cocoa shell particles may be sourced from a cocoa processing waste stream. The board has a grammage of at least about 2000 g/m.sup.2. The board may be assembled into a self-supporting point-of-sale display unit for displaying food products.

A biodegradable board having a high stiffness to weight ratio includes cocoa shell particles, cellulosic wood-based fibers, and no added binders. The cocoa shell particles may be sourced from a cocoa processing waste stream. The board has a grammage of at least about 2000 g/m.sup.2. The board may be assembled into a self-supporting point-of-sale display unit for displaying food products.

A containerboard can include a plurality of first fibers having a length weighted average fiber length that is greater than 0.5 mm, a plurality of second fibers having a length weighted average fiber length that is less than 2.0 mm, and a plurality of SEPF. The fiber length of the first fibers may be greater than the fiber length of the second fibers. The SEPF may include an average hydrodynamic specific surface area of at least 4.5 square meters per gram (m.sup.2/g) and comprise less than 10%, by weight, of the containerboard.

A containerboard can include a plurality of first fibers having a length weighted average fiber length that is greater than 0.5 mm, a plurality of second fibers having a length weighted average fiber length that is less than 2.0 mm, and a plurality of SEPF. The fiber length of the first fibers may be greater than the fiber length of the second fibers. The SEPF may include an average hydrodynamic specific surface area of at least 4.5 square meters per gram (m.sup.2/g) and comprise less than 10%, by weight, of the containerboard.

A total heat exchanging element paper for use in a total heat exchanger, comprising a substrate sheet containing natural pulp, having excellent strength and gas barrier properties, and characterized in that the substrate sheet contains natural pulp having a length-weighted average fiber length of 0.7 to 1.7 mm, the natural pulp has a maximum frequency peak between 0.5 mm and 1.5 mm in the fiber length histogram, and the percentage of fibers having a fiber length of 1.0 mm or more is 20% or more.

A total heat exchanging element paper for use in a total heat exchanger, comprising a substrate sheet containing natural pulp, having excellent strength and gas barrier properties, and characterized in that the substrate sheet contains natural pulp having a length-weighted average fiber length of 0.7 to 1.7 mm, the natural pulp has a maximum frequency peak between 0.5 mm and 1.5 mm in the fiber length histogram, and the percentage of fibers having a fiber length of 1.0 mm or more is 20% or more.

Methods of preparing partially dried or essentially completely dried compositions comprising microfibrillated cellulose and an inorganic particulate material may include microfibrillating a fibrous substrate comprising cellulose in an aqueous environment by grinding in the presence of an inorganic particulate material to form an aqueous composition comprising microfibrillated cellulose and inorganic particulate material, wherein the fibrous substrate comprising cellulose has a Canadian Standard freeness equal to or less than 450 cm, wherein the fibrous substrate to the inorganic particulate material are in a ratio of about 99.5:0.5 to about 0.5:99.5, and wherein the microfibrillated cellulose has a fibre steepness of from about 20 to about 50; by treating the aqueous composition comprising microfibrillated cellulose and inorganic particulate material to remove at least a portion or substantially all of the water of the aqueous composition to form a partially dried or essentially completely dried composition comprising microfibrillated cellulose and inorganic particulate material.