US4756955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density composite based on discontinuous mineral fibers
Assignee: Isover Saint Gobain Recherche
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Filing: 1987-03-31
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Granted: 1988-07-12
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Expires: 2007-03-31
Abstract
Abstract The invention relates to a high density composite sheet based on discontinuous mineral fibers. The inventive sheet has a content of mineral fibers greater than 70 wt. % of the total weight of fibers and binder, and has a density between 400 and 1600 kg/m 3 . The sheet can be employed in particular as an architectural structural wall facing, as a component of a composite insulating panel, etc., and is formed by compressing at high pressure at least one non-woven layer of discontinuous mineral fibers provided with a polymerizable resin which is cured during compression.
Inventors
- 👤 Jean-Claude Rias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:19
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/02; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4218; C; C04; C04B; C04B26/00; C04B26/02; C04B26/10; C04B26/12; D04H1/58; D04H1/587; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10S428/92; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/614; Y10T442/623; Y10T442/696
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A composite sheet of discontinuous mineral glass or rock insulation fibers having a diameter of 2 to 15 microns bound together by a polymerized binder, said sheet produced by the process comprising forming at least one non-woven layer comprising said mineral insulation fibers including a nonpolymerized heat-hardenable binder, compressing said layer at a pressure of about 1-100 bar at a temperature which assures polymerization of the binder; wherein said compressed sheet comprises said mineral insulation fibers in an amount greater than 70 wt. % of the total weight of the fibers plus binder, and has a density between 400 and 1500 kg/m 3 , said composite sheet being a porous sheet.
Claim 2
Dependent Claim
111 words
A composite sheet of discontinuous mineral glass or rock insulation fibers having a diameter of 2 to 15 microns bound together by a polymerized binder, said sheet produced by the process comprising forming at least one non-woven layer comprising said mineral insulation fibers including a nonpolymerized heat-hardenable binder, compressing said layer at a pressure of about 1-100 bar at a temperature which assures polymerization of the binder; wherein said compressed sheet comprises said mineral insulation fibers in an amount greater than 70 wt. % of the total weight of the fibers plus binder, and has a density between 400 and 1500 kg/m 3 , said composite sheet being a porous sheet.
Claim 3
Dependent Claim
16 words
A composite sheet according to claim 1; characterized in that the mineral fibers are glass fibers.
Claim 4
Dependent Claim
30 words
A composite sheet according to claim 1 and characterized in that the binder is a heat-hardenable resin chosen from the group consisting of phenol-formaldehyde, melamine-formaldehyde, urea-formaldehyde resin and mixtures thereof.
Claim 5
Dependent Claim
26 words
A composite sheet according to claim 1, further comprising at least one additive selected from the group consisting of fillers, water-repellant agents, silicone oils and pigments.
Claim 6
Dependent Claim
20 words
A composite sheet according to claim 1; characterized in that its density is between 600 and 1100 kg/m 3 .
Claim 7
Dependent Claim
86 words
A composite sheet according to claim 1 based on discontinuous mineral glass or rock insulation fibers, being bound together by a polymerized binder, said sheet produced from at least one non-woven layer of fibers, said layer compressed under heating; characterized in that said sheet has a content of mineral fibers greater than 70 wt. % of the weight of the fibers plus binder, and has a value of .sup.σ /.sub.ρ, the ratio of the tensile strength to the density, greater than 2×10 -2 MPa- 3 /kg.
Claim 8
Dependent Claim
15 words
A composite sheet according to claim 1; characterized in that it has a molded shape.
Claim 9
Dependent Claim
14 words
A composite sheet according to claim 1; characterized in that it has surface impressions.
Claim 10
Dependent Claim
52 words
A method of manufacturing the composite sheet of claim 1, comprising compressing at least one non-woven layer of discontinuous mineral visulating fibers including a polymerizable resin under a pressure between 1 and 100 bar, at a temperature sufficient to polymerize said binder, and for a duration of at least about 1 min.
Claim 11
Dependent Claim
14 words
The process of claim 9, wherein said pressure is between 10 and 50 bar.
References Cited (Backward Citations)
US4430380A
Cited
US4433020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |