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AssigneeGoulston Technologies, Inc.
InventorsMichael KUTSENKO, Stephen Fox
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The present invention relates to a method for providing nonwoven polypropylene barrier composite fibrous structures with a surface that is both hydrophobic/alcohol repellent and durable to water/alcohol exposure. The method is based on the incorporation, into the nonwoven polypropylene barrier composite fibrous structure, of synergistic combinations of a new generation of non-telomer based fluorinated polymers with non-ionic hydrophobic waxes. When extruded with the polypropylene, these products result in a durable hydrophobic and alcohol repellent surface that is highly desirable to enhancing the utility of the nonwoven polypropylene barrier composite fibrous structures in a wide range of applications and products, ranging from medical to various construction applications.
A composition for providing a hydrophobic water/alcohol repellent surface on a non-woven polypropylene barrier composite which comprises a perfluorinated ester and a hydrophobic non-ionic wax, wherein the perfluorinated ester and the hydrophobic non-ionic wax each comprises 10 to 60% by weight of the composition making up a total of at least 75% by weight of the composition, with other components which do not harmfully affect the hydrophobic water/alcohol repellent properties of the non-woven polypropylene barrier composite comprising up to 25% of the composition.
A non-woven polypropylene barrier composite which comprises a surface having thereon a perfluorinated ester and a hydrophobic non-ionic wax, wherein the perfluorinated ester and the hydrophobic non-ionic wax each comprises 10 to 60% by weight of the composition making up a total of at least 75% by weight of the composition, with other components which do not harmfully affect the hydrophobic water/alcohol repellent properties of the non-woven polypropylene barrier composite comprising up to 25% of the composition.
A process for forming a hydrophobic water/alcohol repellent surface on a non-woven polypropylene barrier composite which comprises adding to polypropylene which is to form the non-woven polypropylene barrier composite a composition which comprises a perfluorinated ester and a hydrophobic non-ionic wax, wherein the perfluorinated ester and the hydrophobic non-ionic wax each comprises 10 to 60% by weight of the composition making up a total of at least 75% by weight of the composition, with other components which do not harmfully affect the hydrophobic water/alcohol repellent properties of the non-woven polypropylene barrier composite comprising up to 25% of the composition, and then extruding the polypropylene containing said composition, whereby the composition is incorporated in an amount such that there is 0.5 to 5% by weight of the composition in the resultant non-woven polypropylene barrier composite.
Dependencies are inferred from the claim text.