Absorbent article comprising cyclodextrin complexes
Disclosed are absorbent articles having a cyclodextrin complex of one or more odor controlling organic compounds wherein the cyclodextrin is a substituted cyclodextrin (wherein the H atom of OH groups in positions 2, 3 and 6 is partially or entirely replaced by a substituent —R) having a substitution degree (DS) of 0.4 or more —R substituents per molecule of cyclodextrin and wherein substitution in position 2 is 20% or above, in position 6 is 20% or above and in position 3 is 50% or below. Cyclodextrin complexes of this type release the odor controlling organic compound much faster and in more complete manner than non-substituted or differently substituted cyclodextrin complexes thus the odor control efficacy is improved.
1. An absorbent article comprising a topsheet, a backsheet, and an absorbent core disposed between the topsheet and the backsheet, the absorbent core comprising:
a substituted cyclodextrin complex comprising:
one or more odor controlling organic compounds; and
substituted cyclodextrin;
wherein the substituted cyclodextrin complex has a substitution degree of about 0.4 to about 2.5 —R substituents per glucose unit of cyclodextrin, and wherein substitution in position 2 is about 20% or above, substitution in position 6 is about 20% or above, and substitution in position 3 is less than that of position 2 or position 6.
2. The absorbent article of claim 1 , wherein the substitution in position 3 is less than 50 percent.
3. The absorbent article of claim 1 , wherein the substitution in position 3 is less than 40 percent.
4. The absorbent article of claim 1 , wherein the substitution in position 3 is less than 30 percent.
5. The absorbent article of claim 1 , wherein the substituted cyclodextrin complex has a substitution degree of between about 0.9 and about 2.4.
6. The absorbent article of claim 1 , wherein the substituted cyclodextrin complex has a substitution degree of between about 1.2 and about 2.2.
7. The absorbent article of claim 1 , wherein the substituted cyclodextrin complex has a substitution degree of between about 1.6 and about 2.1.
8. The absorbent article of claim 1 , wherein the substitution in position 2 is between about 20 percent and about 90 percent.
9. The absorbent article of claim 1 , wherein the substitution in position 2 is between about 45 percent to about 80 percent.
10. The absorbent article of claim 1 , wherein the substitution in position 6 is between about 20 percent and about 90 percent.
11. The absorbent article of claim 1 , wherein the substitution in position 6 is between about 40 percent and 80 percent.
12. The absorbent article of claim 1 , wherein the R substituents are selected from linear or branched C1-C5 saturated chain.
13. The absorbent article of claim 1 , wherein the R substituents are selected from methyl and hydroxymethyl.
14. The absorbent article of claim 1 , wherein the absorbent article comprises an overall length generally parallel to a longitudinal axis of the absorbent article and an overall width generally parallel to a lateral axis of the absorbent article, and wherein the substituted cyclodextrin complex is provided in a target zone of the absorbent article.
15. The absorbent article of claim 14 , wherein the target zone is disposed between two outer zones, and wherein the target zone comprises more than 20 percent to less than 80 percent of the overall length of the absorbent article.
16. The absorbent article of claim 14 , wherein the target zone is disposed between two outer zones, and wherein the target zone comprises more than 30 percent to less than 70 percent of the overall length of the absorbent article.
17. The absorbent article of claim 14 , wherein the target zone is disposed between two outer zones, and wherein the target zone comprises more than 40 percent to less than 60 percent of the overall length of the absorbent article.
18. The absorbent article of claim 1 , wherein the substituted cyclodextrin complex is disposed on a surface of absorbent material particles within the absorbent core.
19. The absorbent article of claim 1 , wherein the one or more odor controlling organic compounds comprises a perfume.