Patent US4728325A successfully refreshed from Google Patents.
US4728325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaper backsheet
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1986-04-03
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Granted: 1988-03-01
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Expires: 2006-04-03
Abstract
Abstract Adhesion to a low gloss polyolefin surface is improved by forming the polyolefin from linear low density polyethylene (LLDPE) with hexene-1 as the comonomer, particularly LLDPE with a density of less than 0.926 and high pressure low density polyethylene (LDPE density of 0.910-0.925) or a mixture of the high pressure low density polyethylene and up to 30 wt. % of a high density polyethylene (HDPE density 0.948-0.965). Preferably the polyolefin composition will contain 45 to 85 wt. % of the LLDPE and 10 to 60 wt. % of LDPE.
Inventors
- 👤 Russell A. Spiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:49
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A disposable diaper having a diaper backsheet of polyolefin, a non-woven top sheet, an absorbent inner layer and refastenable adhesive closure tabs, said polyolefin backsheet having a 45° gloss of less than 9 and a tape peel force greater than 600 grams on the surface exposed to said adhesive tabs, said polyolefin comprising from 30 to 95 wt.% linear low density polyethylene containing hexene-1 comonomer in an amount up to 20 wt.% and from 5 to 70 wt.% of a low density polyethylene or a mixture of low density polyethylene and up to 30 wt.% high density polyethylene.
Claim 2
Dependent Claim
98 words
A disposable diaper having a diaper backsheet of polyolefin, a non-woven top sheet, an absorbent inner layer and refastenable adhesive closure tabs, said polyolefin backsheet having a 45° gloss of less than 9 and a tape peel force greater than 600 grams on the surface exposed to said adhesive tabs, said polyolefin comprising from 30 to 95 wt.% linear low density polyethylene containing hexene-1 comonomer in an amount up to 20 wt.% and from 5 to 70 wt.% of a low density polyethylene or a mixture of low density polyethylene and up to 30 wt.% high density polyethylene.
Claim 3
Dependent Claim
56 words
The disposable diaper according to claim 1 wherein said linear low density polyethylene contains 6 to 12 wt.% hexene-1 and has a density of less than 0.930, said low density polyethylene has a density in the range of 0.910 to 0.925 and said high density polyethylene has a density in the range of 0.941 to 0.965.
Claim 4
Dependent Claim
29 words
The disposable diaper according to claim 2 comprising 40 to 90 wt.% of said linear low density polyethylene and from 10 to 60 wt.% of said low density polyethylene.
Claim 5
Dependent Claim
29 words
The disposable diaper according to claim 3 comprising from 45 to 85 wt.% of said linear low density polyethylene having a density in the range of 0.910 to 0.920.
Claim 6
Dependent Claim
20 words
The disposable diaper according to claim 4 wherein said exposed surface has a 45° gloss of no greater than 8.
Claim 7
Dependent Claim
15 words
The disposable diaper according to claim 4 wherein said low gloss exposed surface is embossed.
Claim 8
Dependent Claim
42 words
The disposable diaper according to claim 1 wherein the surface for contacting the closure tabs is embossed and has an adhesive force of at least 10% higher than the film composition comprising of LDPE, HDPE, LLDPE (butane copolymer) or mixtures of these.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |