Elastic hot melt adhesive composition and an elastic composite made with the same
OwnerDavid B. Malcolm, Kevin P. Davis +5inventors
InventorsDavid B. Malcolm, Kevin P. Davis, Yuanyan Gu, Peter Remmers, Thomas Wittkopf, Kristy J. Beckman, Mark S. Kroll
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Abstract
This invention claims hot melt adhesive compositions that can be used to form elastic composites that are useful in disposable absorbent articles. The compositions have good elastic recovery and high peel adhesion at a viscosity of less than about 15,000 cps at 177° C. (350° F.). The low viscosity makes it possible to apply the hot melt adhesive at a high line speed and target application to only those areas requiring elastic performance.
Claims20
An elastic composite comprising:
- a first and second substrate;
- and
- a hot melt adhesive composition between the first and second substrates thereby permanently bonding the first and second substrates to each other and providing elasticity in the bonded area, said hot melt adhesive composition comprising:
- about 35% by weight to about 60% by weight of one or more styrene block copolymers wherein the one or more styrene block copolymers has an average styrene content of at least about 30% by weight and an average MFR (200° C./5 kg) of no less than about 20,
- greater than about 15% of a plasticizer and,
- a tackifying agent;
- wherein the hot melt adhesive composition has a viscosity of less than about 15,000 cps at 177° C. (350° F.).
A hot melt adhesive composition that can be used to create a bonded, elasticized region, comprising:
- from about 35% to about 60% by weight of one or more styrene block copolymers wherein the one or more styrene block copolymers has an average styrene content of at least about 35% and an average MFR (200° C./5 kg) of no less than about 20,
- greater than about 15% plasticizing oil and,
- a tackifying agent
- wherein the adhesive composition has a viscosity of less than about 15,000 cps at 177° C. (350° F.).
A hot melt adhesive composition that can be used to create a bonded, elasticized region, comprising:
- from about 40% to about 50% by weight of one or more styrene block copolymers wherein the one or more styrene block copolymers has an average styrene content of at least about 35% and an average MFR (200° C./5 kg) of no less than about 20,
- from about 15% to about 30% of a naphthenic plasticizing oil and,
- from about 30% to about 40% by weight of an aromatic modified hydrocarbon resin;
- wherein the adhesive composition has a viscosity of less than about 15,000 cps at 350° F.
Dependencies are inferred from the claim text.