US4297409A
Expired / Lapsed
US
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Manufacture of articles from an organic material and a water-hardenable mass
Assignee: SIDI INTERNATIONAL DE DEVELOPPEMENT INDUSTRIELS HOLDING SA Ste
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Filing: 1979-11-06
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Granted: 1981-10-27
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Expires: 1999-11-06
Abstract
Abstract A material primarily for replacing asbestos-cement products includes a reinforcing network of continuous, fibrillated organic film and a water-hardened mass such as Portland cement and sand or alternatively gypsum. The organic film may be a polyolefin such as polypropylene or high modulus polyethylene. The reinforcement may be incorporated as a woven or non-woven network. A process for making such a material is also described. The material has, in some respects, superior properties in relation to those of asbestos-cement.
Inventors
- 👤 David J. Hannaht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:37
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/0006; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B5/022; C; C04; C04B; C04B16/00; C04B16/04; C04B16/06; C04B16/0608; B32B38/00; B32B2038/0052; B32B2038/0088; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2305/00; B32B2305/10; B32B2305/20; Y; Y10; Y10S; Y10S264/00; Y10S264/47; Y10S428/00; Y10S428/91; Y10T; Y10T442/00; Y10T442/30; Y10T442/3179; Y10T442/3195; Y10T442/3203; Y10T442/3472; Y10T442/3602; Y10T442/361; Y10T442/60; Y10T442/659; Y10T442/665
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
74 words
An article comprising a water-hardened mass and a continuous network of fabrillated film in the form of a plurality of layers embedded in the water-hardened mass, the volume of film amounting to more than 11/2% by volume of the overall volume of the article and the fibrils of said film providing continuous mechanical and frictional bonding to reinforce the water-hardened mass so that under excess loading the article exhibits multiple fine cracks without rupture.
Claim 2
Dependent Claim
74 words
An article comprising a water-hardened mass and a continuous network of fabrillated film in the form of a plurality of layers embedded in the water-hardened mass, the volume of film amounting to more than 11/2% by volume of the overall volume of the article and the fibrils of said film providing continuous mechanical and frictional bonding to reinforce the water-hardened mass so that under excess loading the article exhibits multiple fine cracks without rupture.
Claim 3
Dependent Claim
13 words
An article according to claim 1, wherein the network is a woven network.
Claim 4
Dependent Claim
58 words
An article according to claim 2, wherein the network is in the form of a weave with a doubled warp and a single weft so arranged that at each intersection the weft passes over one warp and beneath the other warp then the warps are twisted after insertion of the weft whereby to lock the weft in position.
Claim 5
Dependent Claim
12 words
An article according to claim 1, wherein said fibrillated film is polypropylene.
Claim 6
Dependent Claim
14 words
An article according to claim 1, wherein said water-hardened mass is cement and sand.
Claim 7
Dependent Claim
12 words
An article according to claim 1, wherein said water-hardened mass is gypsum.
Claim 8
Dependent Claim
30 words
An article according to claim 1, wherein the film is high modulus polyethylene which has been produced in such a way as to orientate the molecules and has been fibrillated.
Claim 9
Dependent Claim
33 words
An article according to claim 1, wherein the fibrillated film is derived from a polyolefin film which has been produced in such a way as to orientate the molecules and has been fibrillated.
Claim 10
Dependent Claim
32 words
An article according to claim 1, wherein the network is derived from a polypropylene film which has been produced in such a way as to orientate the molecules and has been fibrillated.
Claim 11
Dependent Claim
13 words
An article according to claim 1, wherein said fibrillated organic film is flat.
Claim 12
Dependent Claim
15 words
An article according to claim 1, wherein there are at least six layers of network.
Claim 13
Dependent Claim
19 words
An article according to claim 1, wherein the network comprises at least about 2% by volume of the article.
Claim 14
Dependent Claim
19 words
An article according to claim 1, wherein the network comprises at least about 5% by volume of the article.
Claim 15
Dependent Claim
57 words
An article comprising a water-hardened mass and a continuous network of fibrillated organic film in the form of a plurality of expanded, non-woven layers embedded within said mass, the fibrils of said film providing continuous mechanical and frictional bonding to reinforce the water-hardened mass so that under excess loading the article exhibits multiple fine cracks without rupture.
Claim 16
Dependent Claim
57 words
An article comprising a water-hardened mass and a continuous network of fibrillated organic film in the form of a plurality of expanded, non-woven layers embedded within said mass, the fibrils of said film providing continuous mechanical and frictional bonding to reinforce the water-hardened mass so that under excess loading the article exhibits multiple fine cracks without rupture.
Claim 17
Dependent Claim
34 words
An article according to claim 14, wherein the fibrillated organic film is derived from a polyolefin film which has been produced in such a way as to orientate the molecules and has been fibrillated.
Claim 18
Dependent Claim
33 words
An article according to claim 14, wherein the organic film is derived from a polypropylene film which has been produced in such a way as to orientate the molecules and has been fibrillated.
Claim 19
Dependent Claim
30 words
An article according to claim 14, wherein the film is high modulus polyethylene which has been produced in such a way as to orientate the molecules and has been fibillated.
Claim 20
Dependent Claim
13 words
An article according to claim 14, wherein said fibrillated organic film is flat.
Claim 21
Dependent Claim
15 words
An article according to claim 14, wherein there are at least six layers of network.
Claim 22
Dependent Claim
19 words
An article according to claim 14, wherein the network comprises at least about 11/2% by volume of the article.
Claim 23
Dependent Claim
19 words
An article according to claim 14, wherein the network comprises at least about 2% by volume of the article.
Claim 24
Dependent Claim
19 words
An article according to claim 14, wherein the network comprises at least about 5% by volume of the article.
Claim 25
Dependent Claim
14 words
An article according to claim 14, wherein the water-hardened mass is cement and sand.
Claim 26
Dependent Claim
12 words
An article according to claim 14, wherein the water-hardened mass is gypsum.
Claim 27
Dependent Claim
61 words
An article comprising a water-hardened mass and a network of fibrillated, high modulus polyethylene film in the form of a plurality of layers embedded in the water-hardened mass, the volume of film amounting to more than 1% by volume of the overall volume of the article and the fibrils of said film providing continuous mechanical bonding to reinforce the water-hardened mass.
Claim 28
Dependent Claim
61 words
An article comprising a water-hardened mass and a network of fibrillated, high modulus polyethylene film in the form of a plurality of layers embedded in the water-hardened mass, the volume of film amounting to more than 1% by volume of the overall volume of the article and the fibrils of said film providing continuous mechanical bonding to reinforce the water-hardened mass.
Claim 29
Dependent Claim
38 words
A process for the manufacture of articles comprising the steps of providing a supply of water-hardening material, providing a supply of layers of fibrillated organic film network and incorporating one said supply in the other without rotary mixing.
Claim 30
Dependent Claim
38 words
A process for the manufacture of articles comprising the steps of providing a supply of water-hardening material, providing a supply of layers of fibrillated organic film network and incorporating one said supply in the other without rotary mixing.
Claim 31
Dependent Claim
18 words
A process according to claim 26, wherein the network layers are obtained by expanding laterally fibrillated organic film.
Claim 32
Dependent Claim
30 words
A process according to claim 26, wherein the film is high modulus polyethylene which has been produced in such a way as to orientate the molecules and has been fibrillated.
Claim 33
Dependent Claim
15 words
A process according to claim 26, wherein the fibrillated organic film is a polyolefin film.
Claim 34
Dependent Claim
49 words
A process according to claim 26, wherein the fibrillated film is derived from polyolefin film which has been produced in such a way as to promote orientation of the molecular structure and the film, which is then in a state of imminent fibrillation, is fibrillated by further mechanical treatment.
Claim 35
Dependent Claim
12 words
A process according to claim 26, wherein the organic film is polypropylene.
Claim 36
Dependent Claim
21 words
A process according to claim 26, wherein the layers are subjected to mechanical action during the incorporation in the water-hardening mass.
Claim 37
Dependent Claim
44 words
A process according to claim 26, wherein each layer of the network is in the form of a weave with doubled warps and single wefts and is so woven that at each intersection the weft passes over one warp and beneath the other warp.
References Cited (Backward Citations)
US3591395A
Cited
US4242407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |