US5035930A
Expired / Lapsed
US
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Biodegradable shaped products and the method of preparation thereof
Assignee: Brunob II BV
•
Filing: 1990-02-09
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Granted: 1991-07-30
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Expires: 2010-02-09
Abstract
Abstract A biodegradable shaped product comprising an expanded high amylose starch product having at least 45% by weight amylose content, said expanded product having a low density, closed cell structure with good resilience and compressibility. Another embodiment provides a biodegradable packaging material comprising an expanded, low density, closed cell starch product, the starch having at least 45% by weight amylose content and the expanded product having a bulk density of less than about 2.0 lb/ft3, a resiliency of at least about 50%, and a compressibility of from about 100 to 800 g/cm2.
Inventors
- 👤 Norman L. Lacourse
- 👤 Paul A. Altieri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:13
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/125; B; B29; B29C; B29C44/00; B29C44/34; B29C44/3402; B65; B65D; B65D65/00; B65D65/38; B65D65/46; B65D65/466; C08B; C08B30/00; C08B30/20; C08L; C08L3/00; C08L3/12; C08J2303/00; Y; Y02; Y02W; Y02W90/00; Y02W90/10; Y10; Y10S; Y10S264/00; Y10S264/05; Y10T; Y10T428/00; Y10T428/13; Y10T428/1348; Y10T428/1352; Y10T428/1376
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
62 words
A biodegradable shaped product comprising an expanded, low density, closed cell, resilient and compressible starch product, said starch having at least 45% by weight amylose content and the expanded product having a bulk density of from about 0.1 to 5 lb/ft 3 , a resiliency of at least about 20%, and a compressibility of from about 100 to 800 g/cm 2 .
Claim 2
Dependent Claim
62 words
A biodegradable shaped product comprising an expanded, low density, closed cell, resilient and compressible starch product, said starch having at least 45% by weight amylose content and the expanded product having a bulk density of from about 0.1 to 5 lb/ft 3 , a resiliency of at least about 20%, and a compressibility of from about 100 to 800 g/cm 2 .
Claim 3
Dependent Claim
16 words
The product of claim 1 wherein the starch has at least 65% by weight amylose content.
Claim 4
Dependent Claim
26 words
The product of claim 1 wherein the starch is modified with up to about 15% by weight of alkylene oxide containing 2 to 6 carbon atoms.
Claim 5
Dependent Claim
20 words
The product of claim 1 wherein the starch is modified with up to about 10% by weight of propylene oxide.
Claim 6
Dependent Claim
26 words
The product of claim 2 wherein the starch is modified with up to about 15% by weight of alkylene oxide containing 2 to 6 carbon atoms.
Claim 7
Dependent Claim
22 words
The product of claim 5 wherein the expanded product has a bulk density of from about 0.2 to 3 lb/ft 3 .
Claim 8
Dependent Claim
29 words
The product of claim 6 wherein the expanded product has a resiliency of at least about 50% and a compressibility of from about 150 to 700 g/cm 2 .
Claim 9
Dependent Claim
20 words
The product of claim 2 wherein the starch is modified with up to about 10% by weight of propylene oxide.
Claim 10
Dependent Claim
20 words
The product of claim 8 wherein up to about 10% by weight of polyvinyl alcohol is added to the starch.
Claim 11
Dependent Claim
19 words
The product of claim 8 wherein an effective amount of a flame retardant material is added to the starch.
Claim 12
Dependent Claim
19 words
The product of claim 8 wherein an effective amount of a water resistance additive is added to the starch.
Claim 13
Dependent Claim
12 words
The product of claim 11 wherein said additive is a styrene-acrylate resin.
Claim 14
Dependent Claim
17 words
The shaped product of claim 1 which is a packaging product in the form of a sheet.
Claim 15
Dependent Claim
17 words
The shaped product of claim 8 which is a packaging product in the form of a sheet.
Claim 16
Dependent Claim
61 words
A biodegradable packaging material comprising an expanded, low density, closed cell, resilient and compressible starch product, said starch having at least 45% by weight amylose content and the expanded product having a bulk density of less than about 2.0 lb/ft 3 , a resiliency of at lest about 50%, and a compressibility of from about 100 to 800 g/cm 2 .
Claim 17
Dependent Claim
61 words
A biodegradable packaging material comprising an expanded, low density, closed cell, resilient and compressible starch product, said starch having at least 45% by weight amylose content and the expanded product having a bulk density of less than about 2.0 lb/ft 3 , a resiliency of at lest about 50%, and a compressibility of from about 100 to 800 g/cm 2 .
Claim 18
Dependent Claim
17 words
The packaging material of claim 15 wherein the starch has at least 65% by weight amylose content.
Claim 19
Dependent Claim
41 words
The packaging material of claim 16 wherein the expanded product has a bulk density of less than about 1.0 lb/ft 3 , a resiliency of at least about 60% and a compressibility of from about 150 to 700 g/cm 2 .
Claim 20
Dependent Claim
27 words
The packaging material of claim 15 wherein the starch is modified with up to about 15% by weight of alkylene oxide containing 2 to 6 carbon atoms.
Claim 21
Dependent Claim
20 words
The packaging material of claim 15 wherein the starch is modified with up about 10% by weight of propylene oxide.
Claim 22
Dependent Claim
27 words
The packaging material of claim 15 wherein the starch is modified with up to about 15% by weight of alkylene oxide containing 2 to 6 carbon atoms.
Claim 23
Dependent Claim
41 words
The packaging material of claim 20 wherein the expanded product has a bulk density of less than about 1.0 lb/ft 3 , a resiliency of at least about 60% and a compressibility of from about 150 to 700 g/cm 2 .
Claim 24
Dependent Claim
21 words
The packaging material of claim 21 wherein the starch is modified with up to about 10% by weight of propylene oxide.
Claim 25
Dependent Claim
21 words
The packaging material of claim 22 wherein up to about 10% by weight of polyvinyl alcohol is added to the starch.
Claim 26
Dependent Claim
22 words
The packaging material of claim 23 wherein the expanded product has a bulk density of less than about 0.6 lb/ft 3 .
Claim 27
Dependent Claim
20 words
The packaging material of claim 21 wherein an effective amount of a flame retardant material is added to the starch.
Claim 28
Dependent Claim
20 words
The packaging material of claim 16 wherein an effective amount of a water resistance additive is added to the starch.
Claim 29
Dependent Claim
13 words
The packaging material of claim 26 wherein said additive is a styrene-acrylate resin.
Claim 30
Dependent Claim
41 words
The shaped product of claim 1 prepared by extruding the starch in the presence of a total moisture content of 21% or less by weight and at a temperature of from about 150° to 250° C. followed by a thermoforming operation.
Claim 31
Dependent Claim
26 words
The product of claim 28 which is thermoformed into a packaging product selected from the group consisting of a container, carton, sheet, tray, dish or cup.
Claim 32
Dependent Claim
34 words
The product of claim 28 wherein the starch has at least 65% by weight amylose and is modified with up to about 15% by weight of alkylene oxide containing 2 to 6 carbon atoms.
Claim 33
Dependent Claim
26 words
The product of claim 30 which is thermoformed into a packaging product selected from the group consisting of a container, carbon, sheet, tray, dish or cup.
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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) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |