US4742164A
Expired / Lapsed
US
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Bacterial cellulose-containing molding material having high dynamic strength
Assignee: Ajinomoto Co Inc
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Filing: 1986-04-16
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Granted: 1988-05-03
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Expires: 2006-04-16
Abstract
Abstract A molding material having high dynamic strength which contains bacterial cellulose having ribbon-shaped microfibrils. Such material is advantageously used as a reinforcing material for composite plastics having high strength, as high quality paper or as acoustic diaphragms for percussion instruments.
Inventors
- 👤 Masatoshi Iguchi
- 👤 Shigenobu Mitsuhashi
- 👤 Kunihiro Ichimura
- 👤 Yoshio Nishi
- 👤 Masaru Uryu
- 👤 Shigeru Yamanaka
- 👤 Kunihiko Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:21
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/02; C12; C12P; C12P19/00; C12P19/04; D; D01; D01F; D01F2/00; D21; D21H; D21H13/00; D21H13/02; D21H5/00; D21H5/12; G; G10; G10D; G10D13/00; G10D13/01; G10D13/02; G10D13/10; G10D13/20; G10K; G10K13/00; H; H04; H04R; H04R31/00; H04R31/003; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/823; Y10S435/874
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
85 words
A molded material having high dynamic strength and a modulus of elasticity of at least 7.4 GPa, containing ribbon-shaped microfibrils of bacterial cellulose, which is produced by: (a) culturing a bacteria capable of producing cellulose in a nutrient medium, (b) withdrawing the cellulose produced from said culture in the form of a gel, and (c) pressing said gel to remove water from said cellulose by squeezing the same at a pressure sufficient to enhance said dynamic strength or macerating the same or a combination thereof.
Claim 2
Dependent Claim
85 words
A molded material having high dynamic strength and a modulus of elasticity of at least 7.4 GPa, containing ribbon-shaped microfibrils of bacterial cellulose, which is produced by: (a) culturing a bacteria capable of producing cellulose in a nutrient medium, (b) withdrawing the cellulose produced from said culture in the form of a gel, and (c) pressing said gel to remove water from said cellulose by squeezing the same at a pressure sufficient to enhance said dynamic strength or macerating the same or a combination thereof.
Claim 3
Dependent Claim
40 words
The molded material having high dynamic strength according to claim 1, wherein said bacterial cellulose is produced by a microorganism belonging to the genus Acetobacter, the genus Pseudomonas or the genus Agrobacterium, or the bacteria Sarcina ventriculi and Bacterium xylineides.
Claim 4
Dependent Claim
23 words
The molded material having high dynamic strength according to claim 1, wherein a content of said bacterial cellulose is about 0.01% to 100%.
Claim 5
Dependent Claim
42 words
The molded material having high dynamic strength according to claim 1, which further contains at least one material selected from the group consisting of a hydrophilic high molecular weight material, a hydrophobic high molecular weight material, a metal and an inorganic material.
Claim 6
Dependent Claim
17 words
The molded material having high dynamic strength according to claim 1, which further contains a magnetic material.
Claim 7
Dependent Claim
19 words
The molded material having high dynamic strength according to claim 1, which further contains a material having electric conductivity.
Claim 8
Dependent Claim
20 words
The molded material having high dynamic strength according to claim 1, which further contains a material having high thermal conductivity.
Claim 9
Dependent Claim
20 words
The molded material having high dynamic strength according to claim 1, which contains a material having high resistance to weathering.
Claim 10
Dependent Claim
21 words
The molded material having high dynamic strength according to claim 1, which further contains a substance having high resistance to chemicals.
Claim 11
Dependent Claim
17 words
The molded material having high dynamic strength according to claim 1, wherein said bacterial cellulose is macerated.
Claim 12
Dependent Claim
24 words
The molded material having high dynamic strength according to claim 1, which process of preparation further comprises impregnating said molding material with an additive.
Claim 13
Dependent Claim
27 words
The molded material having high dynamic strength according to claim 1, which process of preparation further comprises coating said molding material with a water-proofing high-molecular weight material.
Claim 14
Dependent Claim
17 words
The molded material having high dynamic strength according to claim 1, which is molded into a sheet.
Claim 15
Dependent Claim
16 words
The molded material having high dynamic strength according to claim 13, wherein said sheet is paper.
Claim 16
Dependent Claim
18 words
The molded material having high dynamic strength according to claim 1, which is molded into a thread shape.
Claim 17
Dependent Claim
18 words
The molded material having high dynamic strength according to claim 15, which is molded into a cloth shape.
Claim 18
Dependent Claim
18 words
The molded material having high dynamic strength according to claim 1, which is molded into a solid form.
Claim 19
Dependent Claim
27 words
The molded material having high dynamic strength according to claim 1, wherein said molding material having high dynamic strength is an immobilized carrier having high dynamic strength.
Claim 20
Dependent Claim
23 words
The molded material having high dynamic strength according to claim 1, wherein said molding material having high dynamic strength is an acoustic diaphragm.
Claim 21
Dependent Claim
23 words
The molded material according to claim 1, wherein said ribbon-shaped microfibrils are approximately 100-500 Å in width and approximately 10-200 Å in thickness.
Claim 22
Dependent Claim
30 words
The molded material according to claim 1, wherein said bacterial cellulose comprises cellulose and one or more hetero polysaccharides having cellulose as a main chain and containing β-1,2 or β-1,3-glycans.
Claim 23
Dependent Claim
29 words
The molded material according to claim 21, wherein said hetero polysaccharide is selected from the group consisting of hexose, pentose, mannose, fructose, galactose, xylose, arabinose, ramnose and glucuronic acid.
Claim 24
Dependent Claim
13 words
The molded material according to claim 1, wherein said ribbon-shaped microfibrils are intertwined.
Claim 25
Dependent Claim
23 words
The molded material according to claim 1, wherein said bacterial cellulose has a modulus of elasticity in the range of about 10-20 GPa.
Claim 26
Dependent Claim
24 words
The molded material having high dynamic strength according to claim 1, wherein said gel is pressed in an orthogonal direction to remove said water.
Claim 27
Dependent Claim
21 words
The molded material having high dynamic strength according to claim 25, wherein a squeezing pressure of 1-10 kg/cm 2 is applied.
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) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |