Method for improving properties of cellulose-based fibrous sheet-formed materials for use in medical goods.

• A method for improving surface strength, fiber tear or linting of a sheet-formed fibrous material formed from an aq. slurry of cellulose fiber by spraying a face of the material with a chem. formulation consisting of a polymer contg. at least two carboxylic groups per mol. such as polyacrylic acid or polysaccharide or their sodium and potassium salts and aliph. mono-, di-, or three- basic carboxylic acid with mol. wt. of 40-500 Da in an aq. carrier, keeping the coated face at ≥ 50° for time sufficient to gain the desired improvement including drying time of the material is presented. The chem. formulation is sprayed on the wet laid sheet-formed material at the wet end of a paper machine in an amt. of 1-5% by wt. of the sheet-formed material in a dry state. Also disclosed is a sheet-formed fibrous material prepd. by the method and a laminated product of medical grade comprising the sheet-formed fibrous material and a polymer film. [on SciFinder(R)]

Nyckelord

cellulose pulp paper fiber sheet tear improvement surface spray

medical grade tear resistant cellulosic sheet prodn

Publikations- och innehållstyp

pop (ämneskategori)

pat (ämneskategori)