A method for manufacturing a powdery paper-strengthening agent including a branched (meth)acrylamide-based polymer (A) which includes a step of obtaining (A) component by polymerizing (meth)acrylamide (a1), anionic vinyl monomer (a2), cationic vinyl monomer (a3) and crosslinkable vinyl monomer (a4) in a solvent in a presence of a polymerization initiator, a step of dropping or putting the above (A) component into an organic solvent to form a precipitate, and a step of drying and pulverizing (A) component obtained as the precipitate.

A method for manufacturing a powdery paper-strengthening agent including a branched (meth)acrylamide-based polymer (A) which includes a step of obtaining (A) component by polymerizing (meth)acrylamide (a1), anionic vinyl monomer (a2), cationic vinyl monomer (a3) and crosslinkable vinyl monomer (a4) in a solvent in a presence of a polymerization initiator, a step of dropping or putting the above (A) component into an organic solvent to form a precipitate, and a step of drying and pulverizing (A) component obtained as the precipitate.

This invention relates to an additive based on (co)polymers resulting from the reaction between at least one dialdehyde compound and at least one complex (co)polymer obtained by polymerization of water-soluble monomers in the presence of at least one host (co)polymer comprising vinylamine functions.

The present invention relates to a water-soluble polymer obtained by polymerization of at least a 2-dimethylaminoethyl acrylate monomer and/or its salts, in presence of at least a tocopherol and/or its derivatives, or a tocotrienol and/or its derivatives, and its uses.

A binding material to obtain a molded body by binding fibers to each other, includes a thermoplastic resin and a fluorescent whitener, and the fluorescent whitener has a melting point higher than a fusing point of the thermoplastic resin. The melting point of the fluorescent whitener is preferably 200° C. or more. A content of the fluorescent whitener in the binding material is preferably 1.0 percent by mass or less. The binding material preferably further includes a white pigment.

A binding material to obtain a molded body by binding fibers to each other, includes a thermoplastic resin and a fluorescent whitener, and the fluorescent whitener has a melting point higher than a fusing point of the thermoplastic resin. The melting point of the fluorescent whitener is preferably 200° C. or more. A content of the fluorescent whitener in the binding material is preferably 1.0 percent by mass or less. The binding material preferably further includes a white pigment.

The invention relates to a transfer paper (4) for use for transferring a print of ink onto a fabric, said transfer paper comprising: i) a base paper (2); ii) an additive (8) comprising a starch component, and a binding agent; wherein said starch component being a starch selected from the group comprising: unmodified starch or a modified starch or a mixture thereof; and wherein said binding agent being a binding agent selected from the group comprising: an alkyl ketene dimer, a tall oil/fumaric acid copolymer, a styrene/acrylate copolymer and an alkenyl succinic anhydride and a mixture thereof; wherein said base paper (2) comprises an amount of said additive by being impregnated therewith; and wherein said base paper (2) having a water uptake as defined by a Cobb-45 value of 10-100 g/m.sup.2 and a having a Gurley porosity of 10-140 seconds. The present invention furthermore relates to uses of the transfer paper (4).

The invention relates to a transfer paper (4) for use for transferring a print of ink onto a fabric, said transfer paper comprising: i) a base paper (2); ii) an additive (8) comprising a starch component, and a binding agent; wherein said starch component being a starch selected from the group comprising: unmodified starch or a modified starch or a mixture thereof; and wherein said binding agent being a binding agent selected from the group comprising: an alkyl ketene dimer, a tall oil/fumaric acid copolymer, a styrene/acrylate copolymer and an alkenyl succinic anhydride and a mixture thereof; wherein said base paper (2) comprises an amount of said additive by being impregnated therewith; and wherein said base paper (2) having a water uptake as defined by a Cobb-45 value of 10-100 g/m.sup.2 and a having a Gurley porosity of 10-140 seconds. The present invention furthermore relates to uses of the transfer paper (4).

A water-dispersible composite structure, which comprises one or more layers, and a method of producing the same. At least a part of the layers is formed by a fibrous web or sheet containing 50-90 parts by weight of wood fibers and 10-90 parts by weight of annual or perennial plant fibers and/or 10-50 parts by weight of synthetic short-cut fibers, and 0.1-20% by weight of a binder, calculated from the weight of the fibers, and at least a part of the binder being a water-soluble polymer and another part a water dispersible binder, and the fibrous sheet or web being produced by wet forming. By means of the invention, the fibers of the composite structure can be recovered and recycled by equipment conventionally used in the paper and paperboard industry.

A water-dispersible composite structure, which comprises one or more layers, and a method of producing the same. At least a part of the layers is formed by a fibrous web or sheet containing 50-90 parts by weight of wood fibers and 10-90 parts by weight of annual or perennial plant fibers and/or 10-50 parts by weight of synthetic short-cut fibers, and 0.1-20% by weight of a binder, calculated from the weight of the fibers, and at least a part of the binder being a water-soluble polymer and another part a water dispersible binder, and the fibrous sheet or web being produced by wet forming. By means of the invention, the fibers of the composite structure can be recovered and recycled by equipment conventionally used in the paper and paperboard industry.