Patent US4524042A successfully refreshed from Google Patents.
US4524042A
Expired / Lapsed
US
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Process for producing hydraulically setting extruding materials
Assignee: Kuraray Co Ltd
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Filing: 1983-07-20
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Granted: 1985-06-18
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Expires: 2003-07-20
Abstract
Abstract In a process for producing fiber-reinforced hydraulically setting extruding materials, the process which comprises, not adding the reinforcing fiber in the form of single fibers to the starting materials, but employing it as collected yarns by collecting the single fibers with a collecting agent, uniformly dispersing them in the starting materials, then releasing the collected condition of said dispersed collected yarns and splitting into single fibers by swelling and dissolution of the collecting agent and by the shear force by a screw etc., thereby the dispersion is improved. The single fibers having a great aspect ratio which have been released from the collected condtion are uniformly dispersed in the extruding material, and a remarkable reinforcing effect is obtained.
Inventors
- 👤 Tsuneo Genba
- 👤 Akio Mizobe
- 👤 Masaki Okazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:49
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B16/00; C04B16/04; C04B16/06; C04B16/0616; C04B16/0641
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A process for producing hydraulically setting materials which is characterized by dispersing in said material as a reinforcing fiber collected yarns which are obtained by fixing polyvinyl alcohol fibers with a water-soluble collecting agent to 200-10,000 denier and cutting said fibers so that the aspect ratio of the single fiber unit is 50-700, and 60% or more of which is split into single fibers during extrusion.
Claim 2
Dependent Claim
66 words
A process for producing hydraulically setting materials which is characterized by dispersing in said material as a reinforcing fiber collected yarns which are obtained by fixing polyvinyl alcohol fibers with a water-soluble collecting agent to 200-10,000 denier and cutting said fibers so that the aspect ratio of the single fiber unit is 50-700, and 60% or more of which is split into single fibers during extrusion.
Claim 3
Dependent Claim
35 words
The process for producing hydraulically setting extruding material according to claim 1 wherein the single fiber unit has a single fiber denier of 0.5-25 denier and a tensile strength of 40 kg/mm 2 or more.
Claim 4
Dependent Claim
31 words
The process for producing hydraulically setting extruding material according to claim 1 or 2 wherein the amount of the polyvinyl alcohol collected yarns dispersed in said material is 0.1-3% by weight.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein the aspect ratio of the single fiber unit is 200 to 500.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein the collected yarns are obtained by fixing polyvinyl alcohol fibers with a water-soluble collecting agent to 1,000 to 5,000 denier.
Claim 7
Dependent Claim
20 words
The process of claim 1 wherein 80% or more of the collected yarns are split into single fibers during extrusion.
Claim 8
Dependent Claim
27 words
The process of claim 1 wherein the water-soluble collecting agent comprises a natural product, a derivative of a natural product, a synthetic product or a mixture thereof.
Claim 9
Dependent Claim
83 words
The process claim 1 wherein the water-soluble collecting agent comprises a starch, a cellulose derivative, sodium arginate, an unsaponified polyvinyl acetate emulsion, a cationized polyvinyl acetate emulsion, a partially saponified polyvinyl alcohol, a completely saponified alcohol, an itaconic acid-modified polyvinyl alcohol, a phthalic acid-modified polyvinyl alcohol, an acrylic acid-modified polyvinyl alcohol, an ethylene-vinyl acetate copolymer emulsion, an emulsion of a saponified ethylene-vinyl acetate copolymer, a vinyl acetate-maleic acid copolymer, a vinyl acetate-crotonic acid copolymer, a vinyl acetate-acrylic acid copolymer or a mixture thereof.
Claim 10
Dependent Claim
35 words
The process of claim 1 wherein the hydraulically setting extruding material comprises Portland cement, blast furnace cement, silica cement, fly ash cement, alumina cement, gypsum, calcium silicate, magnesium carbonate, calcium carbonate or a mixture thereof.
Claim 11
Dependent Claim
29 words
The process of claim 1 wherein the hydraulically setting extruding material further comprises perlite, pozzolan, stone dust, silica dust, calcium carbonate dust, a plasticizer, organic fibers or mixtures thereof.
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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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |