Hydrophilic hot melt adhesive
AssigneeBostik Findley, Inc.
InventorsMark Gibes, Diane Strelow, Mark Alper
Life of this patent
Estimating the term…
Abstract
Hydrophilic hot melt adhesive compositions suitable for a variety of applications, especially in nonwoven disposable articles, are prepared by blending various adhesive components with a surfactant. The surfactant has a hydrophile-lipophile balance (HLB) number of less than 15, and is incorporated into the composition in an amount such that the resultant adhesive has a contact angle of 750 of less, and preferably less than about 40°. A low contact angle is desirable so that water, urine or other water-based discharges, upon contacting a laminate bound together by the adhesive, wets out rather than beads up resulting in the fluid being directed away from the adhesive and towards an absorbent core of the disposable article.
Claims22
A hydrophilic hot melt adhesive composition, comprising the following components:
- about 10-50% of a polymer;
- about 40-80% of a tackifying resin;
- about 0-40% of a plasticizer;
- about 0.1-2% of an antioxidant;
- and
- about 0.1-30% of a surfactant, the components totaling 100% by weight, and wherein the adhesive has a contact angle of less than about 75°.
A hydrophilic hot melt adhesive composition, comprising the following components:
- about 18-25% of a polymer;
- about 50-60% of a tackifying resin;
- about 12-25% of a plasticizer;
- about 1% of an antioxidant;
- and
- about 2-15% of a surfactant;
- the components totaling 100% by weight, and wherein the adhesive has a contact angle of less than about 50°.
A method of manufacturing a disposable nonwoven absorbent article, comprising the steps of:
- providing a first sheet material comprising one substrate of a disposable nonwoven absorbent article;
- providing a second sheet material comprising a second substrate of a disposable nonwoven absorbent article;
- applying a hydrophilic hot melt adhesive to one of said first or second sheet material in a configuration such that fluid contacting said adhesive is directed toward a desired absorbent location in one of said first or second sheet material;
- and
- bonding said first and second sheet material together.
Dependencies are inferred from the claim text.