US5037410A
Expired / Lapsed
US
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Disposable articles comprising compostible components
Assignee: Century Adhesives Corp
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Filing: 1990-08-08
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Granted: 1991-08-06
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Expires: 2010-08-08
Abstract
Abstract Disposable articles that mitigate environmental problems when charged into solid waste landfills have a moisture barrier layer in the form of a compostible flexible sheet composed of 20-80% by weight unvulcanized, uncured C4-C6 alkadiene elastomer, e.g., natural rubber, 5-20% of modifier, e.g., casein, dextrose, starch or mixtures thereof, 1-40% filler, e.g., titanium dioxide or fibrous clay, 0-30% wax, e.g., carnauba wax, 0-40% styrene resin, e.g., polystyrene, 0-10% additive, e.g., bis-steramide, and 0-20% yeast. Typically, the sheets have a thickness of about 1 to 10 mils and an ultimate tensile strength of at least 200 grams per inch of width.
Inventors
- 👤 Robert R. Zimmerman
- 👤 Tamela A. Viers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:51
CPC Classifications
C; C08; C08L; C08L7/00; A; A61; A61F; A61F13/00; A61F13/15; A61F13/15203; A61F13/15252; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; A61L15/34; A61L15/42; A61L15/62; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/51429; A61F2013/51431; A61F2013/51433; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K3/346; C08L1/00; C08L1/02; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L3/00; C08L89/00; C08L91/00; C08L91/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
70 words
A disposable article comprising a compostible flexible sheet composed of an unvulcanized, uncured homogeneous mixture of a major percentage of natural rubber with lesser percentages of a modifier selected from casein or equivalent animal or plant protein, dextrose, starch and mixtures thereof and inorganic filler, wherein said sheet has a thickness of about 1 to 10 mils and a tensile strength of at least 200 grams per inch of width.
Claim 2
Dependent Claim
70 words
A disposable article comprising a compostible flexible sheet composed of an unvulcanized, uncured homogeneous mixture of a major percentage of natural rubber with lesser percentages of a modifier selected from casein or equivalent animal or plant protein, dextrose, starch and mixtures thereof and inorganic filler, wherein said sheet has a thickness of about 1 to 10 mils and a tensile strength of at least 200 grams per inch of width.
Claim 3
Dependent Claim
57 words
A disposable article comprising as an independent component thereof a compostible flexible sheet composed of the following ingredients in the stated percentages by weight: ______________________________________
unvulcanized, uncured C4-C6 alkadiene elastomer
20-80%,
modifier selected from animal and plant
protein, dextrose, starch or mixtures thereof
5-20%,
inorganic filler 1-40%,
wax 0-30%,
styrene resin 0-40%,
additive 0-10%
yeast 0-20%.
______________________________________
Claim 4
Dependent Claim
57 words
A disposable article comprising as an independent component thereof a compostible flexible sheet composed of the following ingredients in the stated percentages by weight: ______________________________________
unvulcanized, uncured C4-C6 alkadiene elastomer
20-80%,
modifier selected from animal and plant
protein, dextrose, starch or mixtures thereof
5-20%,
inorganic filler 1-40%,
wax 0-30%,
styrene resin 0-40%,
additive 0-10%
yeast 0-20%.
______________________________________
Claim 5
Dependent Claim
37 words
The article of claim 2 which is a disposable diaper wherein said elastomer is natural rubber, said inorganic filler is selected from titanium dioxide and clay and said styrene resin is selected from polystyrene and styrene/alkadiene copolymers.
Claim 6
Dependent Claim
35 words
The disposable diaper of claim 3 wherein said sheet consists essentially of the following ingredients in the stated percentages by weight: ______________________________________
unvulcanized, uncured natural rubber
65-75%,
casein 10-15%,
wax 10-20%,
inorganic filler 5-20%.
______________________________________
Claim 7
Dependent Claim
30 words
The diaper of claim 3 wherein said sheet has a thickness of about 1 to 2 mils and a tensile strength of at least 200 grams per inch of width.
Claim 8
Dependent Claim
28 words
The diaper of claim 3 wherein said sheet has a tensile strength of at least 400 grams per inch of width at an elongation of at least 400%.
Claim 9
Dependent Claim
62 words
A disposable garment comprising a compostible flexible sheet about 1 to 10 mils thick composed of a homogeneous mixture of the following ingredients in the stated percentages by weight: ______________________________________
unvulcanized, uncured C4-C6 alkadiene elastomer
50-80%,
modifier selected from animal and plant
protein, dextrose, starch or mixtures thereof
5-20%,
inorganic filler 1-40%,
wax 0-30%,
styrene resin 0-40%,
additive 0-10%
yeast 0-20%.
______________________________________
Claim 10
Dependent Claim
62 words
A disposable garment comprising a compostible flexible sheet about 1 to 10 mils thick composed of a homogeneous mixture of the following ingredients in the stated percentages by weight: ______________________________________
unvulcanized, uncured C4-C6 alkadiene elastomer
50-80%,
modifier selected from animal and plant
protein, dextrose, starch or mixtures thereof
5-20%,
inorganic filler 1-40%,
wax 0-30%,
styrene resin 0-40%,
additive 0-10%
yeast 0-20%.
______________________________________
Claim 11
Dependent Claim
33 words
The disposable garment of claim 7 wherein said elastomer is natural rubber, said inorganic filler is selected from titanium dioxide and clay and said styrene resin is selected from polystyrene and styrene/alkadiene copolymers.
Claim 12
Dependent Claim
10 words
The disposable garment of claim 7 which is a diaper.
Claim 13
Dependent Claim
15 words
The disposable garment of claim 7 which is selected from surgical gowns, bibs and aprons.
Claim 14
Dependent Claim
31 words
The disposable garment of claim 7 wherein said sheet has a thickness of about 1 to 2 mils and a tensile strength of at least 200 grams per inch of width.
Claim 15
Dependent Claim
35 words
The disposable garment of claim 7 wherein said sheet consists essentially of the following ingredients in the stated percentages by weight: ______________________________________
unvulcanized, uncured natural rubber
45-75%,
casein 10-15%,
wax 10-20%,
inorganic filler 5-20%.
______________________________________
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) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |