Hot melt adhesive with high softening point tackifying agent
The invention includes a hot melt adhesive composition including an olefin polymer and a high melt point hydrocarbon tackifying agent, such compositions unexpectedly provide improved bonding between the layers found in a disposable absorbent article. In particular, such compositions improve the bond between the nonwoven top sheet and the acquisition distribution layer.
1. A disposable absorbent article comprising:
a top sheet,
an acquisition distribution layer, and
a hot melt adhesive composition comprising,
an olefin polymer, and
from 5% by weight to 60% by weight of a high softening point hydrocarbon tackifying agent having a softening point of from 110° C. to 150° C.,
wherein the hot melt adhesive composition adheres the top sheet to the acquisition distribution layer, and the acquisition distribution layer is a hydrophilic substrate.
2. The disposable absorbent article of claim 1 wherein the hot melt adhesive composition further comprises from 3% by weight to 35% by weight of a plasticizer.
3. The disposable absorbent article of claim 1 wherein the hot melt adhesive composition comprises from 20% by weight to 55% by weight of the high softening point hydrocarbon tackifying agent.
4. The disposable absorbent article of claim 1 wherein the high softening point hydrocarbon tackifying agent is selected from the group consisting of aliphatic and cycloaliphatic hydrocarbon resins.
5. The disposable absorbent article of claim 1 wherein the high softening point hydrocarbon tackifying agent has an aromatic content as tested by Nuclear Magnetic Resonance (NMR) of from 0% by weight to 20% by weight.
6. The disposable absorbent article of claim 1 wherein the high softening point hydrocarbon tackifying agent is at least partially hydrogenated.
7. The disposable absorbent article of claim 1 wherein the high softening point hydrocarbon tackifying agent has a softening point of from 115° C. to 145° C.
8. The disposable absorbent article of claim 1 wherein the olefin polymer is a single site catalyzed propylene based polymer.
9. The disposable absorbent article of claim 1 wherein the olefin polymer is a single site catalyzed propylene based polymer and the hot melt adhesive composition comprises from 30% by weight to 40% by weight of the hydrocarbon tackifying agent.
10. The disposable absorbent article of claim 1 selected from the group consisting of a disposable diaper and an adult incontinence product.
11. The disposable absorbent article of claim 1 wherein the hot melt adhesive composition comprises:
a. from 10% by weight to 80% by weight of a single-site catalyzed propylene based polymer and,
from 15% by weight to 60% by weight of a high softening point hydrocarbon tackifying agent having a softening point of from 110° C. to 150° C.