Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Coated or impregnated woven – knit – or nonwoven fabric which... – Coating or impregnation specified as water repellent
Reexamination Certificate
1998-10-28
2001-02-20
Morris, Terrel (Department: 1771)
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Coated or impregnated woven, knit, or nonwoven fabric which...
Coating or impregnation specified as water repellent
C428S099000, C428S304400, C428S315500, C428S35500R, C604S038000, C604S386000, C604S389000, C604S390000
Reexamination Certificate
active
06191055
ABSTRACT:
BACKGROUND AND FIELD OF THE INVENTION
The present invention relates to improved disposable articles such as diapers, incontinent products, disposable garments, feminine hygiene products, and the like.
Disposable baby diapers are often used in conjunction with powders or oils applied by the parent onto the baby. Quite often, the powder or oil contaminates the outer backsheet portion of the diaper. Typically, the powder or oil is transferred to the diaper backsheet by the parent's hands or from the baby. A persistent problem with such powder and oil contamination is that conventional adhesive tab closures used with diapers are adhered onto the outer backsheet portion of the diaper and do not adequately adhere to surfaces contaminated with talc or particularly oil.
U.S. Pat. No. 4,163,077 proposes a diaper closure system wherein the adhesive used on the fastening tab is a particular blend of a synthetic block copolymer and a blend of solid and liquid polyterpene type tackifiers. This adhesive provides a limited ability to adhere to talc or powder contaminated diaper surfaces, such as polyethylene backsheets typically employed in commercial diaper constructions. However, this adhesive composition does not address the problems of adhering to an oil-contaminated diaper substrate.
The problem of adhering to oil-contaminated surfaces with conventional pressure-sensitive adhesives is addressed in U.S. Pat. No. 3,991,002, which describes a method for improving the adhesion of normal pressure-sensitive adhesive tapes to oily or greasy substrates by treating the oil-contaminated substrate with a primer. This primer comprises a rubbery phase of a A-B-A triblock copolymer, such as a styrene-butadiene or styrene-isoprene block copolymer, and a resin phase comprised of a resin compatible with the conjugated diene portion of the block copolymer and a resin compatible with the monovinyl aromatic hydrocarbon portion of the block copolymer (i.e., styrene). These components are placed in a solution, then applied as an aerosol to render the oil-contaminated surface stable for subsequent adhesion. This patent states that the conventional approach to adhering to oil-contaminated surfaces is a complicated and time-consuming clean-up procedure. However, the primer solution proposed in this patent is still impractical for most consumer applications and particularly in a diaper being applied to a baby.
The present invention is addressed at solving the problems identified above. Particularly, the invention is directed at providing a diaper construction provided with a reinforced tape adhesion zone that has the property of oil-contamination tolerance.
BRIEF DESCRIPTION OF THE INVENTION
The present invention provides a disposable garment, generally a diaper, comprising an adhesive fastening tab permanently adhered to one corner of the garment at first end of the tab. A second free end of the adhesive fastening tab is provided to adhere to a reinforced outer surface of the garment to effect closure of the garment by connecting the first-mentioned corner to the reinforced surface by the two adhered ends of the fastening tab. The reinforcement is provided by a reinforcing film or web layer bonded to a thin outer film or web layer of the garment. The reinforcing layer is comprised of a porous film or web wherein the pores preferably contain at least a minor proportion of an incompatible oil or liquid polymer, the porous reinforcement layer providing oil-contamination tolerance, as well as reinforcing the thin outer film against tearing by the removal of the free end of the adhesive fastening tab.
REFERENCES:
patent: 3991002 (1976-11-01), Sadlo
patent: 4237889 (1980-12-01), Gobran
patent: 4539256 (1985-09-01), Shipman
patent: 4861635 (1989-08-01), Carpenter et al.
patent: 4902553 (1990-02-01), Hwang et al.
patent: 5019071 (1991-05-01), Bany et al.
patent: 5106383 (1992-04-01), Mulder et al.
patent: 5112889 (1992-05-01), Miller et al.
patent: 5264281 (1993-11-01), Arakawa et al.
patent: 5308695 (1994-05-01), Arakawa et al.
patent: 5468237 (1995-11-01), Miller et al.
patent: 5562983 (1996-10-01), Kono et al.
patent: 5885269 (1999-03-01), Boyer, III et al.
patent: 663894 (1994-04-01), None
patent: 677912 (1995-11-01), None
patent: 2221172 (1994-03-01), None
patent: 0 291 984 (1988-11-01), None
patent: 0 306 232 (1989-03-01), None
patent: 0 375 862 B1 (1994-08-01), None
patent: 0 661 959 B1 (1995-07-01), None
patent: 106812 (1993-08-01), None
patent: 54-145740 (1979-11-01), None
patent: 58-149303 (1983-09-01), None
patent: 57-165978 (1984-05-01), None
patent: 59-228008 (1984-12-01), None
patent: 62-282003 (1987-12-01), None
patent: 63-161035 (1988-07-01), None
patent: 63-309605 (1988-12-01), None
patent: 1-162804 (1989-06-01), None
patent: 9305407 (1994-07-01), None
patent: 936070 (1993-08-01), None
patent: WO 92/08763 (1992-05-01), None
patent: WO 94/06387 (1994-03-01), None
Boyer, III Charles E.
Gobran Ramsis
Kinney Robert J.
Midgley Roland R.
Velasquez Urey Ruben E.
3M Innovative Properties Company
Bond William J.
Griswold Gary L.
Morris Terrel
Singh Arti R.
LandOfFree
Oil-tolerant reinforcement strip does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oil-tolerant reinforcement strip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil-tolerant reinforcement strip will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2603628