Claims
- 1. A composite cover for an absorbent product comprising:
- a first, body-facing layer of a substantially hydrophobic material containing fluid passageways therethrough, selected from the group consisting of: a coextruded, apertured film having a top surface comprising linear low density polyethylene and a bottom surface comprising ethylene vinyl acetate; a spunbonded nonwoven polypropylene; a polyester apertured web; and a polyethylene apertured film; and
- a second layer bonded to the surface of said first layer comprising porous material selected from the group consisting of: a nonwoven blend of about 75% of bicomponent fusible fibers and about 25% rayon fibers, said fusible fibers comprising a polyester core and a sheath of high density polyethylene; and a homogenous mixture of about 75% polyester fibers and about 25% bicomponent fusible fibers in the form of a lofty, low density web comprising randomized fibers, said web having been treated with surfactant;
- said fibers of said second layer being in registration with the apertures of the first layer, being minimally wettable and exhibiting a capillary gradient therethrough, with larger average capillaries opposing said first layer and relatively smaller average capillaries spaced away from the first layer, such that said composite cover exhibits unidirectional liquid flow characteristics.
- 2. A composite cover according to claim 1 wherein said second layer interfaces an absorbent layer into which said fluid may pass.
- 3. A composite cover according to claim 1 wherein said first layer comprises a coextruded, apertured film having a top surface comprising linear low density polyethylene and a bottom surface comprising ethylene vinyl acetate.
- 4. A composite cover according to claim 1 wherein said first layer comprises a coextruded, apertured film having a top surface comprising linear low density polyethylene and a bottom surface comprising ethylene vinyl acetate and said second layer comprises a nonwoven blend of about 75% bicomponent fusible fibers and about 25% rayon fibers, said fusible fibers comprising a polyester core and a sheath of high density polyethylene.
- 5. A composite cover according to claim 1, wherein said second layer comprises a homogeneous mixture of about 75% polyester fibers and about 25% of bicomponent fusible fibers in the form of a lofty, low density web comprising randomized fibers, said web having been treated with surfactant.
- 6. A composite cover according to claim 1 which allows a majority of fluid to pass from the body facing side to the side away from said body facing side.
- 7. A composite cover according to claim 1 wherein said first layer comprises spunbonded nonwoven polypropylene.
- 8. A composite cover according to claim 1 wherein said first layer comprises a polyester apertured web.
- 9. A composite cover according to claim 1, wherein said first layer comprises a polyethylene apertured film which has been treated with a non-ionic surfactant, has a basis weight of about 0.7 oz/yd.sup.2, an average open area of about 36% and an equivalent hydraulic diameter of about 0.025 inches.
- 10. A composite cover according to claim 1 wherein said second layer contains pores of sufficient size to permit the passage of fluid without being retained in said second layer.
- 11. A composite cover according to claim 10 wherein said second layer comprises a homogeneous mixture of about 75% polyester fibers and about 25% bicomponent fusible fibers in the form of a lofty, low density web comprising randomized fibers, said web having been treated with surfactant.
- 12. A composite cover according to claim 11, wherein the basis weight of said second layer is about 0.8 oz/yd.sup.2, and the thickness of said composite cover is about 0.015 inches.
- 13. A composite cover according to claim 10 wherein said second layer comprises a nonwoven blend of about 75% bicomponent fusible fibers and about 25% rayon fibers, said fusible fibers comprising a polyester core and a sheath of high density polyethylene.
- 14. A composite cover according to claim 13, wherein said apertured film has a basis weight of about 1.0 oz/yd.sup.2, and has an open area of about 35 to about 45%, apertures in said apertured film having an equivalent hydraulic diameter of about 0.015 to about 0.022 inches, said bicomponent fusible fibers in said second layer have a denier of about 3.0 and staple length of about 1.5 inches and said rayon has a denier of about 1.5 and a staple length of about 1.25 inches.
- 15. A composite cover according to claim 14 wherein said polyester fibers have a denier of about 15.0 and a staple length of 1.5 inches and said bicomponent fusible fibers have a denier of about 3.0 and a staple length of about 1.5 inches and wherein said second layer has a basis weight of about 1.2 oz/yd.sup.2 and has a treatment level of surfactant of about 0.015 cc/in.sup.2 to about 0.025 cc/in.sup.2.
- 16. A composite cover for an absorbent product comprising:
- a first, body facing layer of a substantially hydrophobic material containing fluid passageways therethrough comprising a coextruded, apertured film having a top surface comprising linear low density polyethylene and a bottom surface comprising ethylene vinyl acetate; and
- a second layer bonded to the surface of said first layer comprising porous material comprising a nonwoven blend of about 75% bicomponent fusible fibers and about 25% rayon fibers, said fusible fibers comprising a polyester core and a sheath of high density polyethylene;
- said fibers of said second layer being in registration with the apertures of the first layer, being minimally wettable and exhibiting a capillary gradient therethrough, with larger average capillaries opposing said first layer and relatively smaller average capillaries spaced away from the first layer, such that said composite cover exhibits unidirectional liquid flow characteristics.
- 17. A composite cover according to claim 16, wherein said apertured film has a basis weight of about 1.0 oz/yd.sup.2, and has an open area of about 35 to about 45%, apertures in said apertured film having an equivalent hydraulic diameter of about 0.015 to about 0.022 inches, said bicomponent fusible fibers in said second layer have a denier of about 3.0 and staple length of about 1.5 inches and said rayon has a denier of about 1.5 and a staple length of about 1.25 inches.
- 18. A composite cover according to claim 16, wherein the basis weight of said second layer is about 0.8 oz/yd.sup.2, and the thickness of said composite cover is about 0.015 inches.
- 19. A composite cover for an absorbent product comprising:
- a first, body facing layer of a substantially hydrophobic material containing fluid passageways therethrough comprising a coextruded, apertured film having a top surface comprising linear low density polyethylene and a bottom surface comprising ethylene vinyl acetate; and
- a second layer, the fibers of which are in registration with the apertures of the first layer, said second layer being bonded to the surface of said first layer comprising porous material comprising a homogeneous mixture of about 75% polyester fibers and about 25% of bicomponent fusible fibers in the form of a lofty, low density web comprising randomized fibers, said web having been treated with surfactant; said composite cover exhibiting unidirectional liquid flow characteristics.
Parent Case Info
This is a continuation of application Ser. No. 387,673, filed Jul. 31, 1989 abandoned which in turn was a continuation of Ser. No. 158,415 filed Feb. 22, 1988, abandoned which in turn was a continuation of Ser. No. 06/886,271 filed Jul. 15, 1986 abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
165807 |
Dec 1985 |
EPX |
Continuations (3)
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Number |
Date |
Country |
Parent |
387673 |
Jul 1989 |
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Parent |
158415 |
Feb 1988 |
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Parent |
886271 |
Jul 1986 |
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