US4447490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated mineral fibre mat and processes for its production
Assignee: DUETSCHE ROCKWOOL MINERALWOLL-GESELLSCHAFT MBH
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Filing: 1982-11-26
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Granted: 1984-05-08
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Expires: 2002-11-26
Abstract
Abstract A laminated mineral fibre mat consisting of substantially randomly arranged mineral fibres which are held together by organic binders where they cross one another and which form the mat and of a lamination adhering to the mat by means of an organic adhesive, characterized in that a plane substantially free from organic binder is provided in the mat parallel to and in the vicinity of the lamination, whereby the laminated product is rendered fire resistant. The binder-free zone is created prior to lamination by removal of the binder from the mat.
Inventors
- 👤 Heinz Ventker
- 👤 Fred Wendlinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:57
CPC Classifications
D; D06; D06N; D06N7/00; D06N7/0005; D06N7/0039; D06N7/0042; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T442/00; Y10T442/60; Y10T442/654; Y10T442/656
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
72 words
A laminated mineral fibre mat comprising substantially randomly arranged mineral fibres which are held together by organic binders where they cross one another and which form the mat and of a lamination adhering to the mat by means of an organic adhesive, characterised in that a plane of substantially randomly arranged mineral fibers substantially free from organic binder is provided in the mat parallel to and in the vicinity of the lamination.
Claim 2
Dependent Claim
72 words
A laminated mineral fibre mat comprising substantially randomly arranged mineral fibres which are held together by organic binders where they cross one another and which form the mat and of a lamination adhering to the mat by means of an organic adhesive, characterised in that a plane of substantially randomly arranged mineral fibers substantially free from organic binder is provided in the mat parallel to and in the vicinity of the lamination.
Claim 3
Dependent Claim
32 words
A mineral fibre mat as claimed in claim 1, characterised in that the plane free from organic binder has a thickness of at least 2 mm and preferably at least 4 mm.
Claim 4
Dependent Claim
19 words
A mineral fibre mat as claimed in claim 1, characterised in that the organic binder is a phenol-formaldehyde resin.
Claim 5
Dependent Claim
24 words
A mineral fibre mat as claimed in claim 1, characterised in that the lamination is bonded to the mat by a polyethylene-based hot-melt adhesive.
Claim 6
Dependent Claim
19 words
A mineral fibre mat as claimed in claim 1, characterised in that the lamination consists of an aluminum foil.
Claim 7
Dependent Claim
61 words
A process for the production of the mineral fibre mat claimed in claim 1, characterised in that binder is removed from the mat of substantially randomly arranged mineral fibers in a plane parallel and adjacent to the surface to be laminated and thereafter the lamination is applied and adhered to the binder-free surface of the mat through use of an adhesive.
Claim 8
Dependent Claim
19 words
A process as claimed in claim 6, characterised in that, before hardening, binder is dissolved out by organic solvents.
Claim 9
Dependent Claim
25 words
A process as claimed in claim 6, characterised in that, after hardening, binder is removed by exposing the surface of the mat to a flame.
Claim 10
Dependent Claim
61 words
A process for producing the laminated mineral fibre mats claimed in claim 1, characterised in that a binder-containing mat is initially produced, a layer of binder-free fibres is subsequently applied to the mat, after which the binder in the mat is hardened and the lamination subsequently is applied and adhered to the layer of binder-free fibres through use of an adhesive.
Claim 11
Dependent Claim
70 words
A process for producing the laminated mineral fibre mats claimed in claim 1, characterised in that a layer of binder-free mineral fibres is bonded to the lamination before its application to the binder-containing mineral fibre mat, after which the lamination is applied to the binder-containing mat and bonded thereto, binder optionally being sprayed in at that point at which the lamination and the mat come into contact with one another.
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) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |