US6479164B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing composite materials from renewable raw materials
Assignee: BioTec Biologische Naturverpackungen GmbH and Co KG
•
Filing: 1998-04-06
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Granted: 2002-11-12
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Expires: 2018-04-06
Abstract
Abstract There is provided a method for preparing composite materials from renewable raw materials wherein natural raw materials, especially in fiber form, comprising starch as binder are molded by adding water in accordance with a predetermined temperature and time profile to form boards and molded articles. The advantages of this method reside in said materials being fully biodegradable and free from harmful substances.
Inventors
- 👤 Jürgen Lörcks
- 👤 Winfried Pommeranz
- 👤 Kurt Klenke
- 👤 Harald Schmidt
- 👤 Joachim Heuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:42
CPC Classifications
D; D21; D21J; D21J1/00; C; C08; C08L; C08L97/00; C08L97/02; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
33 words
A composite article comprising fibers of renewable material physically bound by a starch-based biodegradable binder, wherein said starch-based biodegradable binder is a physically cured matrix of a dried colloid of a swellable starch.
Claim 2
Dependent Claim
33 words
A composite article comprising fibers of renewable material physically bound by a starch-based biodegradable binder, wherein said starch-based biodegradable binder is a physically cured matrix of a dried colloid of a swellable starch.
Claim 3
Dependent Claim
15 words
A composite article as defined in claim 1 wherein said composite article comprising a board.
Claim 4
Dependent Claim
16 words
A composite article as defined in claim 1 wherein the composite article comprises a molded article.
Claim 5
Dependent Claim
18 words
A composite article as defined in claim 1 wherein the fibers of renewable raw material comprise wood fibers.
Claim 6
Dependent Claim
16 words
A composite article as defined in claim 1 wherein the composite article comprises an extruded article.
Claim 7
Dependent Claim
49 words
A composite article as defined in claim 1 wherein the starch of the starch-based biodegradable binder comprises native starch in natural or hybrid form derived from the group consisting of potatoes, manoic, corn, wax corn, corn with high amylose content, grain flours, physically modified starch and chemically modified starch.
Claim 8
Dependent Claim
29 words
A composite article as defined in claim 1 wherein the fibers are fibers of plant-based raw materials selected from the group consisting of lignocellulose, wood, wood chips, and cotton.
Claim 9
Dependent Claim
16 words
A composite article as defined in claim 1 wherein the composite article comprises a nonwoven fabric.
Claim 10
Dependent Claim
40 words
A composite article is defined in claim 1 wherein the composite article is formed by heating a mixture comprising fibers, water, and the starch-based biodegradable binder in order to evaporate the water therefrom and form the cured starch binder matrix.
Claim 11
Dependent Claim
52 words
A molded composite article of manufacture comprising fibers of a renewable material dispersed throughout and bound together by a starch-based biodegradable binder matrix formed by blending together the starch-based biodegradable binder, water, and fibers and heating the resulting mixture in order to evaporate water therefrom to form the starch-based biodegradable binder matrix.
Claim 12
Dependent Claim
52 words
A molded composite article of manufacture comprising fibers of a renewable material dispersed throughout and bound together by a starch-based biodegradable binder matrix formed by blending together the starch-based biodegradable binder, water, and fibers and heating the resulting mixture in order to evaporate water therefrom to form the starch-based biodegradable binder matrix.
Claim 13
Dependent Claim
19 words
A molded composite article of manufacture as defined in claim 9 wherein the molded composite article comprises a board.
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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) | 2005-11-11 | 2006-05-13 | 2006-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-11-11 | 2010-05-13 | 2010-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-11-11 | 2014-05-13 | 2014-11-12 | $7700.00 | Window Closed / Lapsed |