The invention relates to drinking U-straws and more particularly to a paper for manufacturing drinking U-straws, which is environmental friendly, bio-degradable and is able to be formed in the shape of a bent straw with an accordion-like structure at the bend. The paper has high water resistance as well as high strength and elongation properties compatible with the intended use. In particular, the paper for forming a U-straw includes: •between 10 and 50 dry wt % of first fibers having a length of between 1.4 mm and 2.5 mm; •between 40 and 80 dry wt % of second fibers having a length of between 0.3 mm and 0.8 mm; and•between 1 and 6 dry wt % of a sizing agent.

Fibrous elements, such as filaments, and more particularly to fibrous elements employing a polymer and a wetting agent, methods for making such fibrous elements, fibrous structures employing such fibrous elements, methods for making such fibrous structures and packages containing such fibrous structures are provided.

The present disclosure generally relates to glyoxalated polyacrylamide (GPAM) compositions, methods of preparation and methods of use thereof, particularly in the paper industry. Moreover, the present disclosure generally pertains to cationic GPAM compositions, methods of preparation and methods of use thereof in papermaking applications and in products such as paper-based products, wherein the cationic GPAM compositions may provide increased wet and/or dry strength to the paper-based products, and wherein such cationic GPAM compositions optionally require a reduced volume of an aqueous carrier for storage or transport compared to a volume of an aqueous carrier needed for conventional GPAMs used in papermaking.

The present disclosure generally relates to glyoxalated polyacrylamide (GPAM) compositions, methods of preparation and methods of use thereof, particularly in the paper industry. Moreover, the present disclosure generally pertains to cationic GPAM compositions, methods of preparation and methods of use thereof in papermaking applications and in products such as paper-based products, wherein the cationic GPAM compositions may provide increased wet and/or dry strength to the paper-based products, and wherein such cationic GPAM compositions optionally require a reduced volume of an aqueous carrier for storage or transport compared to a volume of an aqueous carrier needed for conventional GPAMs used in papermaking.

The invention relates to a process for manufacturing wet strength resins, which process comprises a polyamide reactor (11) for amidation, an EHH reactor (12) for epihalohydrin addition, a maturing tank (15) for maturing, a ring-closure and cross-linking reactor (16) for polymerization, and in the process a reaction mixture containing at least EHH and at least polyaminoamide epihalohydrin adduct is manufactured. The process further comprises between the maturing tank (15) and the ring-closure and cross-linking reactor (16) a membrane unit (20) comprising a membrane by dividing the reaction mixture stream from the membrane unit (20) into two streams: a permeate stream (202) comprising un-reacted epi-halohydrin and a reject stream (201) comprising EHH/PAIM adduct guided to the ring-closure and cross-linking reactor (16).

The invention relates to a process for manufacturing wet strength resins, which process comprises a polyamide reactor (11) for amidation, an EHH reactor (12) for epihalohydrin addition, a maturing tank (15) for maturing, a ring-closure and cross-linking reactor (16) for polymerization, and in the process a reaction mixture containing at least EHH and at least polyaminoamide epihalohydrin adduct is manufactured. The process further comprises between the maturing tank (15) and the ring-closure and cross-linking reactor (16) a membrane unit (20) comprising a membrane by dividing the reaction mixture stream from the membrane unit (20) into two streams: a permeate stream (202) comprising un-reacted epi-halohydrin and a reject stream (201) comprising EHH/PAIM adduct guided to the ring-closure and cross-linking reactor (16).

The invention provides an associative polymer, a powder, and a process for making a powder comprising, networking one or more associative polymer(s) and one or more optional surfactant(s) to form a wet gel, and forming a powder from the wet gel, wherein the associative polymer(s) have a weight average molecular weight of from about 10 kDa to about 2,000 kDa.

A method for producing dried multilayer paper is provided comprising dewatering a first aqueous fibrous suspension, thereby creating a first fibrous web; dewatering a second aqueous fibrous suspension, thereby creating a second fibrous web; spraying one or more of a first fibrous web and a second fibrous web with a spray solution or spray suspension, thereby producing at least one sprayed fibrous web; assembling the first fibrous web with the second fibrous web; dehydrating the resulting layer compound by pressing; then dehydrating by supplying heat, which creates the dried multilayer paper. The spray solution or spray suspension contains water and at least one water-soluble polymer P. The polymer P is obtained by polymerizing: 40 to 85 mol % of a monomer of Formula I ##STR00001##
in which R.sup.1=H or C.sub.1-C.sub.6-Alkyl; and 15 to 60 mol % of one or more ethylenically unsaturated monomers.

Resin systems and methods for making and using same are provided. The method for making a paper product can include contacting a plurality of pulp fibers with a resin system. The resin system can include a first polyamidoamine-epihalohydrin resin and a second resin that can include a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture thereof to produce a paper product. The first resin and the second resin can be sequentially or simultaneously contacted with the plurality of pulp fibers. The period for sequential addition between the first resin and the second resin is about 1 second to about 1 hour.

Resin systems and methods for making and using same are provided. The method for making a paper product can include contacting a plurality of pulp fibers with a resin system. The resin system can include a first polyamidoamine-epihalohydrin resin and a second resin that can include a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture thereof to produce a paper product. The first resin and the second resin can be sequentially or simultaneously contacted with the plurality of pulp fibers. The period for sequential addition between the first resin and the second resin is about 1 second to about 1 hour.