US3610245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flushable wrapper for absorbent pads and pad covered therewith
Assignee: Kimberly Clark Corp
•
Filing: 1969-04-10
•
Granted: 1971-10-05
•
Expires: 1989-04-10
Abstract
Abstract An improved wrapper for sanitary napkins and other absorbent pads, adapted for easy disposal by flushing down conventional sewerage systems. The wrapper comprises a nonwoven fiber web bonded by dialdehyde starch alone or in combination with coldwater-soluble binders. A web of such structure retains significant strength during use in the presence of moisture given off by body fluids, but is readily disintegrated after short exposure to excess water, as in the sewerage system, for easy disposal.
Inventors
- 👤 Leo J Bernardin
- 👤 John F Champaigne Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:49
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
18 words
The improved wrapper of claim 1 in which said wet burst value is at least about 20 grams/cm2.
Claim 2
Dependent Claim
21 words
The improved wrapper of claim 1 in which said dialdehyde starch is oversprayed on a web previously treated with said binder.
Claim 3
Dependent Claim
14 words
The improved wrapper of claim 3 in which said cold-water-soluble binder is polyvinyl alcohol.
Claim 4
Dependent Claim
38 words
The improved wrapper of claim 4 in which said dialdehyde starch is present in the amount of at least 2.5 percent by weight and the polyvinyl alcohol is present in the amount of about 10 percent by weight.
Claim 5
Dependent Claim
38 words
The improved wrapper of claim 1 in which said dialdehyde starch is present in the amount of at least 2.5 percent by weight and the cold-water-soluble binder is present in the amount of about 10 percent by weight.
Claim 6
Dependent Claim
40 words
The improved wrapper of claim 1 in which said nonwoven web comprises a carded web of rayon fibers. 8. The improved wrapper of claim 1 in which said nonwoven web comprises a laminate of at least two crosslaid carded webs.
Claim 7
Dependent Claim
23 words
The improved wrapper of claim 1 in which said dialdehyde starch is present in the amount of at least 5 percent by weight.
Claim 8
Dependent Claim
106 words
A sanitary napkin comprising an absorbent core enwrapped with a fluid pervious wrapper capable of being readily dispersed in excess water, said wrapper comprising a dry-formed nonwoven web of staple length cellulosic fibers bonded at least in part by an adhesive material which provides said web with a wet burst value sufficient to maintain said web intact when subjected to the moist environment produced by body-generated fluids and which wet burst value decays rapidly after disposal of said web in an excess of water, whereby the fibers in said web and said napkin are free to disperse in said water said adhesive material being dialdehyde starch.
Claim 9
Dependent Claim
18 words
The sanitary napkin of claim 10 in which said wet burst value is at least about 20 grams/cm2.
Claim 10
Dependent Claim
15 words
The sanitary napkin of claim 10 in which the fibers in said web are rayon.
Claim 11
Dependent Claim
17 words
The sanitary napkin of claim 10 in which said adhesive material is augmented by a cold-water-soluble binder.
Claim 12
Dependent Claim
21 words
The sanitary napkin of claim 13 in which said dialdehyde starch is oversprayed on a web previously bonded with said binder.
Claim 13
Dependent Claim
14 words
The sanitary napkin of claim 14 in which said cold-water-soluble binder is polyvinyl alcohol.
Claim 14
Dependent Claim
23 words
The sanitary napkin of claim 12 in which said dialdehyde starch is present in the amount of at least 5 percent by weight.
Claim 15
Dependent Claim
36 words
The sanitary napkin of claim 13 in which said dialdehyde starch is present in the amount of at least 2.5 percent and the cold-water-soluble binder is present in the amount of about 10 percent by weight.
Claim 16
Dependent Claim
14 words
The sanitary napkin of claim 17 in which said water-soluble binder is polyvinyl alcohol.
References Cited (Backward Citations)
CA759238A
Cited
US3123075A
Cited
US2546705A
Cited
US3101292A
Cited
US3034922A
Cited
US3017291A
Cited
US3067088A
Cited
US3269852A
Cited
US3236721A
Cited
US3372086A
Cited
US3332901A
Cited
US3370590A
Cited
US3480016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |