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US4369201A
Expired / Lapsed
US
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Method of manufacturing reinforced fibers for mineral structural materials, and a structural element of a fiber-reinforced mineral structural material
Assignee: Individual
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Filing: 1981-03-02
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Granted: 1983-01-18
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Expires: 2001-03-02
Abstract
Abstract A method of manufacturing reinforcing fibers for a hydraulic binding material, to be used as an initial material for structural elements comprises the steps of providing a plurality of plant fibers and mineralizing the plant fibers. The mineralizing step includes opening the capilaries of the plant fibers, drying the same, impregnating the plant fibers with a lime water suspension, soaking the plant fibers with a formaldehyde-containing water glass solution, and intermediately drying the plant fibers between the impregnating and soaking steps. The plant fibers, after the drying, can be first impregnated with a lime water suspension, then dried, and after this soaked with a formaldehyde-containing water glass solution. It is also possible that the plant fibers, after drying, can be first soaked with a formaldehyde-containing water glass solution, then dried and after this impregnated with a lime water suspension. A structural element has a body of a hydraulic binding material, and a plurality of reinforcing fibers which are formed as mineralized plant fibers.
Inventors
- 👤 Harald Kober
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:44
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; C; C04; C04B; C04B18/00; C04B18/04; C04B18/18; C04B18/24; C04B18/28; E04C2/06; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/4935
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
90 words
A method of manufacturing reinforcing fibers for a hydraulic binding material, to be used as an initial material for structural elements such as pipes, plates and the like, the method comprising the steps of providing a plurality of plant fibers having capillaries; and mineralizing the plant fibers by opening the capillaries of the plat fibers, drying the plant fibers, impregnating the plant fibers with a lime water suspension, soaking the plant fibers with a formaldehyde-containing water glass solution, and intermediately drying the plant fibers between said impregnating and soaking steps.
Claim 2
Independent Claim
90 words
A method of manufacturing reinforcing fibers for a hydraulic binding material, to be used as an initial material for structural elements such as pipes, plates and the like, the method comprising the steps of providing a plurality of plant fibers having capillaries; and mineralizing the plant fibers by opening the capillaries of the plat fibers, drying the plant fibers, impregnating the plant fibers with a lime water suspension, soaking the plant fibers with a formaldehyde-containing water glass solution, and intermediately drying the plant fibers between said impregnating and soaking steps.
Claim 3
Dependent Claim
64 words
A method as defined in claim 1, wherein said impregnating step is performed after said drying step, said intermediate drying step being performed after said impregnating step so that the plant fibers impregnated with the water lime suspension are dried, and said soaking step being performed after said intermediately drying step so that the lime-containing fibers are soaked with the formaldehyde-containing water glass solution.
Claim 4
Dependent Claim
65 words
A method as defined in claim 1, wherein said soaking step is performed after said drying step, said intermediately drying step being performed after said soaking step so that the plant fibers soaked with the formaldehyde-containing water glass solution are dried, and said impregnating step being performed after said intermediately drying step so that the soaked plant fibers are impregnated with the lime water suspension.
Claim 5
Dependent Claim
20 words
A method as defined in claim 1, wherein said providing step includes cutting the plant fibers to a predetermined length.
Claim 6
Dependent Claim
15 words
A method as defined in claim 1, wherein said providing step includes providing flax fibers.
Claim 7
Dependent Claim
45 words
A method as defined in claim 1, wherein said soaking step includes soaking with the formaldehyde-containing water glass solution with a degree of dilution of substantially between 10% and 20% of a silicate selected from the group consisting of a calcium silicate and sodium silicate.
Claim 8
Dependent Claim
29 words
A method as defined in claim 1; and further comprising the step of final drying of the plant fibers, after a respective one of said soaking and impregnating steps.
Claim 9
Dependent Claim
32 words
A method as defined in claim 1; and further comprising the step of final treating the plant fibers with a mineral material, after a respective one of said soaking and impregnating steps.
Claim 10
Dependent Claim
26 words
A method as defined in claim 1; and further comprising the step of substantially completely removing wooden particles from the plant fibers, before said opening step.
Claim 11
Dependent Claim
23 words
A method as defined in claim 1, wherein said opening step includes hackling, scalding and squeezing the plant fibers with subsequently drying thereof.
Claim 12
Dependent Claim
26 words
A method as defined in claim 4, wherein said cutting step includes cutting the plant fibers to a length of substantially between 4 and 25 mm.
Claim 13
Dependent Claim
34 words
A method as defined in claim 5, wherein said drying step and said final drying step includes continuously moving and loosening the plant fibers, after a respective one of said soaking and impregnating steps.
Claim 14
Dependent Claim
30 words
A method as defined in claim 12, wherein said drying step and said final drying step include drying the plant fibers in a whirling layer of a hot air apparatus.
Claim 15
Dependent Claim
27 words
A method as defined in claim 1, wherein said providing step includes preliminarily drying the plant fibers to a residual moisture of not more than substantially 10%.
Claim 16
Dependent Claim
37 words
A method as defined in claim 14, wherein said preliminary drying step includes preliminarily drying the plant fibers to a residual moisture of substantially 8%, said soaking step including soaking during substantially between 10 and 12 minutes.
Claim 17
Dependent Claim
33 words
A method as defined in claim 14, wherein said preliminarily drying step includes drying to a residual moisture of substantially 2%, said soaking step including soaking during substantially between 2 and 4 minutes.
References Cited (Backward Citations)
GB259636A
Cited
US4263049A
Cited
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