Drapeable sanitary absorbent napkin and materials for use in drapeable sanitary absorbent articles
View Patent ↗An absorbent article including a cover layer, a barrier layer and an absorbent system arranged between the cover layer and the barrier layer, the absorbent article being drapeable and possessing the absorbency attributes required of a sanitary napkin.
1. An absorbent article comprising:
a cover layer,
a barrier layer;
an absorbent layer arranged between said cover layer and said barrier layer, said absorbent layer comprising less than 50% cellulosic fibers, less than 20% bonding materials and greater than 30% nonbonding materials;
wherein said absorbent article has a thickness of less than 2.5 mm; and
wherein at least a portion of said absorbent article satisfies one of the two following equations:
AI>2.37−0.77 ln(BW/MCB), where BW/MCB is ≦5.9; and
AI>1.0, where BW/MCB is >5.9.
2. The absorbent article according to claim 1 , wherein said absorbent article has a thickness of less than 2.0 mm.
3. The absorbent article according to claim 1 , wherein said absorbent article has a thickness of less than 1.5 mm.
4. The absorbent article according claim 1 , wherein said absorbent layer includes superabsorbent material.
5. The absorbent article according to claim 4 , wherein said absorbent layer includes a mixture of cellulosic fibers and a superabsorbent polymer (SAP).
6. The absorbent article according to claim 5 , wherein said SAP has an absorbency rate of at least 20 g/g after 1 minute.
7. The absorbent article according to claim 5 , wherein said SAP has a total capacity, of at least 40 g/g.
8. The absorbent article according to claim 1 , wherein at least a portion of said absorbent article has a BW/MCB ratio of at least 2.5.
9. The absorbent article according to claim 1 , wherein said bonding material of said absorbent layer is a latex material.
10. The absorbent article according to claim 9 , wherein said latex material has a T g of less than 25° C.
11. The absorbent article according to claim 1 , wherein said bonding material of said absorbent layer is a bicomponent fiber.
12. The absorbent article according to claim 11 , wherein said bicomponent fiber has a denier per filament of 3 dpf or less.
13. The absorbent article according to claim 1 , wherein said absorbent layer contains less than 10% bonding materials.
14. The absorbent article according to claim 1 , wherein said absorbent layer contains between about 3% to about 5% bonding materials.
15. The absorbent article according to claim 1 , wherein said absorbent layer comprises a first synthetic fiber having a melting temperature less than a process temperature and a second synthetic fiber having a melting temperature higher than a process temperature.
16. The absorbent article according to claim 1 , wherein said cover layer comprises a spunlaced material said spunlace material having a fluid absorption time of less than 100 s.
17. The absorbent article according to claim 16 , wherein said spunlace material has a fluid absorption time of less than 50 s.
18. The absorbent article according to claim 17 wherein said spunlace material has a fluid absorption time of less than 30 s.
19. The absorbent article according to claim 16 , wherein said spunlaced material is composed of at least 90% nonabsorbent fibers.
20. The absorbent article according to claim 16 , wherein said spunlaced material is composed of at least 95% nonabsorbent fibers.
21. The absorbent article according to claim 16 , wherein said spunlaced material is composed of 100% nonabsorbent fibers.
22. The absorbent article according to claim 1 , wherein said spunlace material is composed substantially entirely of nonabsorbent fibers.
23. The absorbent article according to claim 22 , wherein a portion of the nonabsorbent fibers are introduced in the form of a preformed web.
24. The absorbent article according to claim 23 , wherein said preformed web material is polypropylene.
25. The absorbent article according to claim 24 , wherein said preformed web makes up between about 10% and about 50% of the total spunlaced material weight.
26. An absorbent article comprising:
a liquid permeable spunlaced cover layer having a fluid absorption time of less than 60 seconds;
a liquid impermeable barrier layer;
an absorbent layer arranged between said cover layer and said barrier layer, said absorbent layer comprising less than 50% cellulosic fibers, less than 20% bonding materials and greater than 30% nonbonding materials, said absorbent layer including a superabsorbent polymer in an amount of at least 20% by weight of said absorbent layer and said superabsorbent polymer having a total capacity of at least 40 g/g and an absorbency rate of at least 20 g/g after 1 minute;
wherein said absorbent article has a thickness of less than 2.0 mm; and
wherein at least a portion of said absorbent article satisfies one of the two following equations:
AI>2.37−0.77 ln(BW/MCB), where BW/MCB is ≦5.9; and
AI>1.0, where BW/MCB is >5.9.