Non-skid surface compositions for paper products
AssigneeKey-Tech, Inc.
InventorRonald Carstens
Life of this patent
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Abstract
A composition is disclosed, which when applied to the surface of a paper product, such as a corrugated board, improves the slip-angle. The composition, consisting of an aqueous suspension of colloidal silica and urea, finds particular utility in products resulting from recycled paper.
Claims23
An article comprising a paper substrate formed at least in part from recycled fiber having adhered to at least one surface thereof an anti-skid effective amount of a composition resulting from an aqueous solution comprising colloidal silica having a pH greater than 7 to approximately 11 and a mean particle size in the range of 10 to 150 millimicrons, and a clathrating agent selected from the group consisting of urea and thiourea.
A method of increasing the coefficient of friction of the surface of a substrate formed from paper comprising applying to said surface an anti-skid effective amount of a composition comprising an alkaline aqueous sol of colloidal silica having a pH greater than 7 to approximately 11 and a mean particle size in the range of 10 to 150 millimicrons, and a clathrating agent selected from the group consisting of urea and thiourea and evaporating the water therefrom.
Dependencies are inferred from the claim text.