The present invention relates to an aqueous barrier coating composition comprising: 50-99.9% by weight of one or more anionic low molecular weight polysaccharide(s) having a degree of polymerization (DP) in the range of 2-12; 0.1-10% by weight of a polycationic polymer; based on the total dry weight of the aqueous barrier coating composition.

The present invention relates to an aqueous barrier coating composition comprising: 50-99.9% by weight of one or more anionic low molecular weight polysaccharide(s) having a degree of polymerization (DP) in the range of 2-12; 0.1-10% by weight of a polycationic polymer; based on the total dry weight of the aqueous barrier coating composition.

Provided is a powdery paper-strengthening agent comprising an amphoteric (meth)acrylamide-based polymer (A) having a weight-average molecular weight of 1,000,000 to 7,000,000, wherein the amphoteric (meth)acrylamide-based polymer (A) comprises, as constituent monomers, (meth)acrylamide which is an (a1) component, a cationic unsaturated monomer which is an (a2) component, an anionic unsaturated monomer which is an (a3) component, and a crosslinkable unsaturated monomer which is an (a4) component, and wherein an aqueous solution, in which the amphoteric (meth)acrylamide-based polymer (A) is dissolved in a calcium chloride aqueous solution having an electrical conductivity of 4 mS/cm at 25° C. so as to be 1% by weight, has a maximum turbidity of 10 to 2500 NTU at pH 3 to 9.

A method is provided for coating a fibrous web, in particular a fibrous web comprising nanocellulose fibres. The method includes steps of applying a coating agent to a textured surface region of a textured substrate, applying a fibre furnish or a wet fibrous web onto the coated textured surface region of the textured substrate, optionally dewatering to provide a wet fibrous web, and drying said wet fibrous web such that at least a portion of said coating agent is transferred to said fibrous web. The method provides a coated fibrous web with improved barrier properties.

A protective barrier well suited for use in sublimation printing is made primarily from cellulose fibers. The protective barrier, which can comprise an uncoated paper, can be used to prevent sublimation inks from bleeding through a fabric onto the printing equipment. The uncoated paper is recyclable and can enter the paper recycle stream. The uncoated paper can contain first cellulose fibers combined and blended with second cellulose fibers that differ in fiber length and/or in the degree of refining. The uncoated paper is constructed to have a relatively low diffusivity.

The use of hemp paper for use to manufacture paper sleeves paper sleeves and other devices made from hemp for holding cups.

The use of hemp paper for use to manufacture paper sleeves paper sleeves and other devices made from hemp for holding cups.

Paper products, which could be made into bags, wrappers, receptacles, cups, boxes, and the like, are disclosed. The paper is coated with a water-resistant and oil resistant coating. In the case of forming paper bags, pouches, and the lie, the adhesives that could be used to bond the coated side in juxtaposition that can form a high bonding power can be any latex-base modifier copolymer, or modified loctite by heat sealing or the use of styrene ester copolymer are also disclosed.

An oil repellent agent including a modified natural product having at least one hydroxyl group, wherein a hydrogen atom of the hydroxyl group is replaced with an R group represented by —Y—Z, wherein Y represents a direct bond, —C(═O)—, —C(═O)—NR′— or —C(═S)—NR′—, where R′ represents a hydrogen atom or a C.sub.1 to C.sub.4 alkyl group); and Z represents a hydrocarbon group having 1 to 40 carbon atoms and optionally having a substituent or a polysiloxane. The natural material is a natural product other than starch and preferably is a monosaccharide, a polysaccharide, glycerin or polyglycerin. Also disclosed is a textile product to which the oil-resistant agent is attached, an oil-resistant paper and a method of treating paper with the oil-resistant agent.

An oil repellent agent including a modified natural product having at least one hydroxyl group, wherein a hydrogen atom of the hydroxyl group is replaced with an R group represented by —Y—Z, wherein Y represents a direct bond, —C(═O)—, —C(═O)—NR′— or —C(═S)—NR′—, where R′ represents a hydrogen atom or a C.sub.1 to C.sub.4 alkyl group); and Z represents a hydrocarbon group having 1 to 40 carbon atoms and optionally having a substituent or a polysiloxane. The natural material is a natural product other than starch and preferably is a monosaccharide, a polysaccharide, glycerin or polyglycerin. Also disclosed is a textile product to which the oil-resistant agent is attached, an oil-resistant paper and a method of treating paper with the oil-resistant agent.