Highly wettable—highly flexible fluff fibers and disposable absorbent products made of those
View Patent ↗An absorbent core comprising fluff pulp fiber treated with polysiloxane, wherein the absorbent core has a density of about 0.15 g/cm 3 or greater and a Young's modulus of about 75 psi or less. The polysiloxane may comprise an amino-functional moiety, The absorbent core may comprise superabsorbent, and may be employed in a disposable absorbent product.
1. An absorbent core comprising fluff pulp fiber treated with polysiloxane, wherein the absorbent core has a density of about 0.15 g/cm 3 or greater and a Young's modulus of about 75 psi or less, and wherein the polysiloxane has a general structure of:
wherein:
n is an integer ≧2;
each R′ and R″ moiety comprises independently an organofunctional group and non-organofunctional group or mixtures thereof.
2. The absorbent core of claim 1 , wherein the absorbent core has a first insult rate of about 1 mL/s or greater.
3. The absorbent core of claim 1 , wherein the absorbent core has a basis weight of about 150 g/m 2 or greater.
4. The absorbent core of claim 1 , wherein the polysiloxane comprises an amino-functional moiety.
5. The absorbent core of claim 1 , wherein the amino-functional moiety is selected from the group of primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.
6. The absorbent core of claim 1 , wherein the fluff pulp fibers are treated with the polysiloxane before the absorbent core is formed.
7. The absorbent core of claim 1 , further comprising superabsorbent material.
8. The absorbent core of claim 2 , further comprising superabsorbent material.
9. A disposable absorbent product containing the absorbent core of claim 1 or claim 7 .
10. A disposable absorbent product containing the absorbent core of claim 2 or claim 8 .
11. An absorbent core comprising
a) fluff pulp fiber treated with polysiloxane; and,
b) superabsorbent material;
wherein the absorbent core has a superabsorbent content of about 25% or greater, a density of about 0.25 g/ 3 or greater, and a Young's modulus of about 500 psi or less, and wherein the polysiloxane has a general structure of:
wherein:
n is an integer ≧2;
each R′ and R″ moiety comprises independently an organofunctional group and non-organofunctional group or mixtures thereof.
12. The absorbent core of claim 11 , wherein the absorbent core has a first insult rate of about 0.7 mL/s or greater and a second insult rate of about 2 mL/s or greater.
13. The absorbent core of claim 11 , wherein the absorbent core has a basis weight of about 50 g/m 2 or greater.
14. The absorbent core of claim 11 , wherein the polysiloxane comprises an amino-functional moiety.
15. The absorbent core of claim 11 , wherein the amino-functional moiety is selected from the group of primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.
16. The absorbent core of claim 11 , wherein the fluff pulp fibers are treated with the polysiloxane before the absorbent core is formed.
17. A disposable absorbent product containing the absorbent core of claim 11 .
18. A disposable absorbent product containing the absorbent core of claim 12 .
19. An absorbent core comprising
a) fluff pulp fiber treated with polysiloxane; and,
b) superabsorbent material;
wherein the absorbent core has a superabsorbent content of about 25% or greater, has a density of about 0.25 g/cm 3 or greater, and a Young's modulus of about 500 psi or less and wherein the polysiloxane has a general structure of:
wherein:
n is an integer ≧2;
each R′ and R″ moiety comprises independently an organofunctional group and non-organofunctional group or mixtures thereof.
20. The absorbent core of claim 19 , wherein the absorbent core has a first insult rate of about 0.7 mL/s or greater and a second insult rate of about 2 mL/s or greater.
21. The absorbent core of claim 19 , wherein the absorbent core has a basis weight of about 50 g/m 2 or greater.
22. The absorbent core of claim 19 , wherein the polysiloxane comprises an amino-functional moiety.
23. The absorbent core of claim 19 , wherein the amino-functional moiety is selected from the group of primary amine, secondary amine, tertiary amine, quaternary amine, unsubstituted amide, and mixtures thereof.
24. The absorbent core of claim 19 , wherein the fluff pulp fibers are treated with the polysiloxane before the absorbent core is formed.
25. A disposable absorbent product containing the absorbent core of claim 19 .
26. A disposable absorbent product containing the absorbent core of claim 20 .