US3580253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanitary napkin and flushable wrapper therefor
Assignee: Kimberly Clark Corp
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Filing: 1968-12-09
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Granted: 1971-05-25
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Expires: 1988-12-09
Abstract
Abstract A flushable pad wrapper for sanitary napkins comprising a nonwoven web of cellulosic fibers in which the fibers are bonded together by sodium carboxymethylcellulose acidified to a pH of between 2.2 to 2.0. This wrapper has sufficient wet strength and abrasion resistance to perform satisfactorily in normal use but disintegrates readily when immersed and agitated in water.
Inventors
- 👤 Leo J Bernardin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:37
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
21 words
The wrapper of claim 1 in which said fibers are selected from the group consisting of natural cellulose and regenerated cellulose.
Claim 2
Dependent Claim
12 words
The wrapper of claim 1 in which said web comprises carded fibers.
Claim 3
Dependent Claim
15 words
The wrapper of claim 2 in which said web comprises carded textile length rayon fibers.
Claim 4
Dependent Claim
19 words
The wrapper of claim 3 in which said web comprises multiple carded webs crosslaid with respect to one another.
Claim 5
Dependent Claim
14 words
The wrapper of claim 1 in which the pH of said binder is 2.2.
Claim 6
Dependent Claim
40 words
A sanitary napkin comprising an absorbent core enwrapped with a fluid-pervious wrapper comprising a nonwoven web of textile fibers bonded by an adhesive comprising sodium carboxymethylcellulose; said binder being acidified to a pH in the range of 2.2 to 2.0.
Claim 7
Dependent Claim
24 words
A sanitary napkin in accordance with claim 7 in which said fibers are selected from the group consisting of natural cellulose and regenerated cellulose.
Claim 8
Dependent Claim
15 words
A sanitary napkin in accordance with claim 7 in which said web comprises carded fibers.
Claim 9
Dependent Claim
24 words
A sanitary napkin in accordance with claim 8 in which the fibers in said web comprises a carded web of staple length rayon fibers.
Claim 10
Dependent Claim
60 words
A process for producing a flushable wrapper for sanitary napkins which comprises forming a lightweight nonwoven web from cellulosic fibers, impregnating said web with a dilute solution of sodium carboxymethylcellulose, passing said impregnated web through an acidifying solution having a pH of from 2.2 to 2.0, washing said web free of said acidifying solution, and drying said web with heat.
Claim 11
Dependent Claim
33 words
The process of claim 11 in which said web is caused to pick up said sodium carboxymethylcellulose in an amount of between about 2 percent and 20 percent by weight of the fibers.
Claim 12
Dependent Claim
15 words
The process of claim 11 in which said web is formed by carding the fibers.
Claim 13
Dependent Claim
15 words
The process of claim 11 in which said web is formed by airlaying the fibers.
Claim 14
Dependent Claim
16 words
The process of claim 13 in which said carded webs are crosslaid before impregnation and acidification.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |