US4047534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nursing pad
Assignee: Kimberly Clark Corp
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Filing: 1977-01-03
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Granted: 1977-09-13
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Expires: 1997-01-03
Abstract
Abstract A nursing pad of multi-ply construction that is conformable and comfortable with a high resistance to strike-through and low sticking properties. The pad includes a lightweight layer of thermoplastic polymeric microfibers on one side of an absorbent middle layer containing thermoplastic polymeric fibers and, on the opposite side of the middle layer, a lightweight spun-bonded continuous filament thermoplastic polymer layer. The microfiber layer provides resistance to strike-through and will tend to cling to many fabrics preventing displacement of the pad during normal use. The continuous filament layer provides comfort and strength with a reduced tendency to stick. The combination is bonded by embossing wherein the embossing pattern on the microfiber side occupies a lower percentage of the surface area than the bonding pattern on the continuous filament side.
Inventors
- 👤 Susan N. Thomaschefsky
- 👤 Ann Sprangers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:03
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/14; A61F13/141; A61F13/15; A61F2013/15008; A61F2013/15016
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
180 words
A flexible, breathable nursing pad having low stick properties, consisting essentially of, a layer having a basis weight of from about 0.2 oz/yd 2 to 1.5 oz/yd 2 of synthetic polymeric microfibers having an average fiber diameter of up to 10 microns and a tendency to cling to garments containing natural fibers and a resistance to the passage of aqueous liquids of at least 60 min. according to the Mason jar test, an absorbent middle layer comprising 30 to 50% polymeric fibers by weight and having a basis weight from about 150 g/yd 2 to about 250 g/yd 2 , and a spunbonded continuous synthetic polymeric filament layer having a basis weight of from about 0.25 oz/yd 2 to 1.5 oz/yd 2 on the other side of said absorbent layer opposite from said microfiber layer, said combination being bonded by means of embossments wherein the embossing pattern on the microfiber side occupies from about 1% to 5% of the surface area and the embossing pattern on the continuous filament side occupies from about 10% to 20% of the surface area.
Claim 2
Dependent Claim
180 words
A flexible, breathable nursing pad having low stick properties, consisting essentially of, a layer having a basis weight of from about 0.2 oz/yd 2 to 1.5 oz/yd 2 of synthetic polymeric microfibers having an average fiber diameter of up to 10 microns and a tendency to cling to garments containing natural fibers and a resistance to the passage of aqueous liquids of at least 60 min. according to the Mason jar test, an absorbent middle layer comprising 30 to 50% polymeric fibers by weight and having a basis weight from about 150 g/yd 2 to about 250 g/yd 2 , and a spunbonded continuous synthetic polymeric filament layer having a basis weight of from about 0.25 oz/yd 2 to 1.5 oz/yd 2 on the other side of said absorbent layer opposite from said microfiber layer, said combination being bonded by means of embossments wherein the embossing pattern on the microfiber side occupies from about 1% to 5% of the surface area and the embossing pattern on the continuous filament side occupies from about 10% to 20% of the surface area.
Claim 3
Dependent Claim
25 words
The nursing pad of claim 1 wherein the microfibers are polypropylene having a softening point in the range of from 135° F to 150° F.
Claim 4
Dependent Claim
34 words
The nursing pad of claim 1 wherein the absorbent layer comprises a mixture of polypropylene fibers having a softening point in the range of from 135° F to 150° F and natural cellulose fibers.
Claim 5
Dependent Claim
27 words
The nursing pad of claim 1 wherein the spunbonded layer comprises polypropylene having a softening point in the range of from about 160° F to 165° F.
Claim 6
Dependent Claim
44 words
The nursing pad of claim 1 wherein the thermoplastic material used to form the microfiber layer, the spunbonded layer and the polymeric component of the absorbent layer is polypropylene having a softening point in the range of from about 135° F to 150° F.
Claim 7
Dependent Claim
180 words
A nursing pad comprising, an absorbent layer having a basis weight of from about 150 g/yd 2 to 250 g/yd 2 and comprising a mixture of absorbent, natural cellulose fibers with thermoplastic fibers and containing from about 30 to 50 percent thermoplastic fibers by weight, on one side of said absorbent layer a nonwoven cover having a basis weight of from about 0.25 oz/yd 2 to 1.5 oz/yd 2 formed from thermoplastic filaments having a porosity of from about 600 to 900 to 900 ft 3 /min/ft 2 , on the other side of said absorbent layer a nonwoven cover having a basis weight of from about 0.2 oz/yd 2 to 1.5 oz/yd 2 formed from thermoplastic microfibers having a water resistance at least 60 minutes according to the Mason jar test, said layers being interbonded by the application of heat and pressure in spaced areas wherein the spaced areas on the microfiber side cover 1 to 5 percent of the total area and the spaced areas on the opposite side cover 10 to 20 percent of the total area.
Claim 8
Dependent Claim
180 words
A nursing pad comprising, an absorbent layer having a basis weight of from about 150 g/yd 2 to 250 g/yd 2 and comprising a mixture of absorbent, natural cellulose fibers with thermoplastic fibers and containing from about 30 to 50 percent thermoplastic fibers by weight, on one side of said absorbent layer a nonwoven cover having a basis weight of from about 0.25 oz/yd 2 to 1.5 oz/yd 2 formed from thermoplastic filaments having a porosity of from about 600 to 900 to 900 ft 3 /min/ft 2 , on the other side of said absorbent layer a nonwoven cover having a basis weight of from about 0.2 oz/yd 2 to 1.5 oz/yd 2 formed from thermoplastic microfibers having a water resistance at least 60 minutes according to the Mason jar test, said layers being interbonded by the application of heat and pressure in spaced areas wherein the spaced areas on the microfiber side cover 1 to 5 percent of the total area and the spaced areas on the opposite side cover 10 to 20 percent of the total area.
Claim 9
Dependent Claim
41 words
The nursing pad of claim 6 wherein the thermoplastic material used to form the nonwoven covers and the thermoplastic fibers in the absorbent layer is polypropylene having a softening point in the range of from about 135° F to 150° F.
References Cited (Backward Citations)
US2617102A
Cited
US3855046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |