Hydrophilic hotmelt adhesive
AssigneeThe Procter & Gamble Company
InventorsTorsten Lindner, Gültekin Erdem
Life of this patent
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Abstract
A hotmelt adhesive comprising a metallocene-catalyzed polyolefin and a hydrophilic melt additive. The adhesive is permanently hydrophilic and can be in particular used to bond components of a disposable hygienic article such as a diaper.
Claims19
A hydrophilic hotmelt adhesive comprising by weight of the hotmelt adhesive:
- from about 30% to about 99% of a metallocene-catalyzed polyolefin, wherein the metallocene-catalyzed polyolefin has a peak molecular weight in the range of from about 10,000 g/mol to about 130,000 g/mol, wherein the peak molecular weight is measured according to the Peak Molecular Weight (Mp) Measurement Method,
- from about 0.1% to about 10% of a hydrophilic melt additive, wherein the hydrophilic melt additive comprises a first wetting agent and a second wetting agent, and wherein the second wetting agent comprises a water-soluble, nonionic, nonhydrolyzable polyoxyalkylene-modified organosilicone polymer, and
- from about 0% to about 40% of a tackifier.
An absorbent article comprising a bond formed by a hydrophilic hotmelt adhesive, wherein the article comprises a topsheet, an absorbent core, a backsheet, and optionally an acquisition layer, wherein the absorbent core optionally comprises an absorbent material and a core wrap, wherein the bond formed by the hydrophilic hotmelt adhesive is between two layers selected from:
- the topsheet and the optional acquisition layer;
- or
- the optional acquisition layer and the absorbent core;
- or
- the topsheet and the absorbent core;
- or
- the core wrap and the absorbent material;
- wherein the hotmelt adhesive comprises, by weight:
- from about 30% to about 99% of a metallocene-catalyzed polyolefin, and
- from about 0.1% to about 10% of a hydrophilic melt additive, and
- from about 0% to about 40% of a tackifier,
- wherein the metallocene-catalyzed polyolefin has a peak molecular weight in the range of from about 10,000 g/mol to about 70,000 g/mol, wherein the peak molecular weight is measured according to the Peak Molecular Weight (Mp) Measurement Method, and
- wherein the hydrophilic melt additive comprises a first wetting agent and a second wetting agent, and wherein the second wetting agent comprises a water-soluble, nonionic, nonhydrolyzable polyoxyalkylene-modified organosilicone polymer;
- and wherein the hotmelt adhesive comprises a plasticizer, wherein the plasticizer comprises up to about 20% of the hotmelt adhesive.
Dependencies are inferred from the claim text.