The present disclosure discloses a bio-based waterproof and oil-proof wrapping paper and a preparation method thereof, and belongs to the field of waterproof and oil-proof papers. The method for preparing the waterproof and oil-proof wrapping paper in the present disclosure includes: (1) impregnating base paper in a calcium chloride solution, taking out the base paper, and drying the base paper; (2) mixing sodium alginate, a plasticizer and water uniformly to obtain a sodium alginate solution; mixing an acetic acid aqueous solution, chitosan, a plasticizer and a crosslinking agent uniformly to obtain a chitosan solution; then coating a surface of the calcium chloride pretreated base paper with the sodium alginate solution, followed by drying to obtain a single-layer oil-proof paper; and then coating a surface of the single-layer oil-proof paper with the chitosan solution, followed by drying to obtain a double-layer oil-proof paper; and (3) adding nanoparticles into a biological wax solution; and then coating a surface of the double-layer oil-proof paper with the biological wax-nanoparticle solution, followed by drying to obtain the waterproof and oil-proof paper.

A paperboard structure including a paperboard substrate having a first major side and a second major side, a barrier coating layer on the first major side of the paperboard substrate, a top coat on the first major side of the paperboard substrate, wherein the barrier coating layer is positioned between the paperboard substrate and the top coat, and a heat-sealable barrier coating layer on the second major side of the paperboard substrate.

A paperboard structure including a paperboard substrate having a first major side and a second major side opposed from the first major side, and a coating layer on the first major side, the coating layer includes a polymer and talc, wherein the polymer includes at least one of poly(butylene succinate) and poly(butylene succinate-co-adipate).

A paperboard structure including a paperboard substrate having a first major side and a second major side, a barrier coating layer on the first major side of the paperboard substrate, a top coat on the first major side of the paperboard substrate, wherein the barrier coating layer is positioned between the paperboard substrate and the top coat, and a heat-sealable barrier coating layer on the second major side of the paperboard substrate.

A paperboard structure including a paperboard substrate having a first major side and a second major side, a barrier coating layer on the first major side of the paperboard substrate, a top coat on the first major side of the paperboard substrate, wherein the barrier coating layer is positioned between the paperboard substrate and the top coat, and a heat-sealable barrier coating layer on the second major side of the paperboard substrate.

Paper products with a thermally insulating coating are disclosed. Methods of making and using thermally insulated paper products are also disclosed.

Methods of making a paper or board product comprising a top ply slurry comprising microfibrillated cellulose and, optionally, one or more inorganic particulate material, applied to a forming web of paper through an applicator comprising a channel terminating in a slot, wherein the slot is in fluid communication with a flexible blade suitable to form a top ply on top of the forming web of paper at the wet end of the paper machine and applicators for practicing such methods.

A coating slip including at least one pigment, water and: between 30% and 90% by weight of dextrin (A) of at least one dextrin having a weight-average molecular weight M.sub.A of less than 500 kDa; between 10% and 70% by weight of dextrin (B) of at least one dextrin having a weight-average molecular weight M.sub.B; the weight amounts of dextrins being relative to the total amount of the mixture of dextrins (A) and (B) in the composition, characterized in that M.sub.B is greater than M.sub.A+50 kDa. Also, a process for coating paper including a step of coating with this slip, and also to the paper obtained at the end of this process.

A coating slip including at least one pigment, water and: between 30% and 90% by weight of dextrin (A) of at least one dextrin having a weight-average molecular weight M.sub.A of less than 500 kDa; between 10% and 70% by weight of dextrin (B) of at least one dextrin having a weight-average molecular weight M.sub.B; the weight amounts of dextrins being relative to the total amount of the mixture of dextrins (A) and (B) in the composition, characterized in that M.sub.B is greater than M.sub.A+50 kDa. Also, a process for coating paper including a step of coating with this slip, and also to the paper obtained at the end of this process.

According to an example, a recording medium may include a substrate; a first coating including an inorganic pigment, a first binder, and a fixative agent; and a second coating including inorganic nanoparticles and a second binder; in which the inorganic pigment may be a plate-shaped pigment.