GB2356649A - Fire resistant sandwich plate - Google Patents

Fire resistant sandwich plate Download PDF

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Publication number
GB2356649A
GB2356649A GB0027419A GB0027419A GB2356649A GB 2356649 A GB2356649 A GB 2356649A GB 0027419 A GB0027419 A GB 0027419A GB 0027419 A GB0027419 A GB 0027419A GB 2356649 A GB2356649 A GB 2356649A
Authority
GB
United Kingdom
Prior art keywords
sandwich plate
core
fire
resistant
covering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0027419A
Other versions
GB0027419D0 (en
GB2356649B (en
Inventor
Andreas Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SCHREINEREL SCHNEIDER AG
Original Assignee
SCHREINEREL SCHNEIDER AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SCHREINEREL SCHNEIDER AG filed Critical SCHREINEREL SCHNEIDER AG
Publication of GB0027419D0 publication Critical patent/GB0027419D0/en
Publication of GB2356649A publication Critical patent/GB2356649A/en
Application granted granted Critical
Publication of GB2356649B publication Critical patent/GB2356649B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/10—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/047—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/24—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
    • E04C2/36—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels
    • E04C2/365—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels by honeycomb structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0221—Vinyl resin
    • B32B2266/0235—Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/022—Foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/024—Honeycomb
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2311/00—Metals, their alloys or their compounds
    • B32B2311/24—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2375/00—Polyureas; Polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2377/00—Polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2379/00—Other polymers having nitrogen, with or without oxygen or carbon only, in the main chain
    • B32B2379/08—Polyimides

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Description

2356649 FIRE-RESISTANT SANDWICH PLATE The present invention relates to a
fire-resistant sandwich plate, and in particular to a fire-resistant sandwich plate consisting of first and second covering plates between which a substantially lighter core is disposed.
Fire-resistant plates are used, for example, as floor or wall plates in railway or tram carriages, wherein different plate constructions are known. In particular, various requirements are expected of floor plates, e.g. good fire resistance, high resistance to compression and stability, low weight and low cost, and these requirements are not satisfactorily fulfilled in combination by conventional plates.
For example, fire-resistant plates formed from a plurality of wooden plates with the direction of their grains crossing are normally sufficiently resistant to compression, but are also relatively heavy. Wooden plates assembled so that the directions of their grains cross are hereinafter referred to as "closed" plates.
On the other hand, so-called sandwich plates exist which comprise layers of different materials. In order to save weight, a substantially lighter core is disposed between two covering plates. The known sandwich plates are either insufficiently resistant to compression and/or not completely fire-resistant, or have a fire resistant compression- resistant core which is relatively expensive.
With regard to the disadvantages of the aforementioned hitherto-known plates, at least the preferred embodiments of the invention have the object of providing a fire-resistant plate of the type mentioned above which combines good fire-resistant properties, high resistance to compression, stability and low weight, and is also cheap to produce.
According to a f irst aspect of the invention, there is provided a fire-resistant sandwich plate with a first and a second covering plate, between which a substantially lighter core is disposed, characterised in that the covering plates each comprise at least three closed layers of wood, glued to one another, and are formed so as to be fire-resistant, and that the core is enclosed by fire-resistant material.
Since the core is surrounded by fire-resistant material, it is not necessary to make it fire-proof. In this way, it can be produced more cheaply and/or with lower weight. The fact that the covering plates have at least three glued, closed layers of wood stabilises the sandwich plate and increases its soundproofing properties in comparison to metal plates.
The core advantageously has a density of a maximum of 300 kg /M3, preferably a maximum of 160 kg /M3 and a modulus of elasticity in the transverse direction to the covering plates of 1000 N/MM2, preferably at least 4000 N/mm2. In preferred embodiments, the core may comprise, for example, balsa wood, a foam, which may be formed from, for example, polyetherimide, polyurethane or PVC, or a honeycomb plate, for example formed from aluminium or aramid. In this way, high resistance to compression can be attained.
In a preferred embodiment, an edge strip, which is formed to be fire-resistant and comprises at least three layers of glued wood, is disposed around the core between the first and the second covering plate, and is preferably glued to the two covering plates. The.entire sandwich plate thus substantially only comprises layers of glued wood and the core.
The fire-resistant effect of the covering pla'tes and the edge strip is preferably produced by the use of a fire-retardant adhesive, preferably phenol resin adhesive. Inorganic, non-corrosive salts may be added to the adhesive. Alternatively, the layers of wood can be suitably treated.
Preferred embodiments of the invention will now be described by way of example only and with reference to the accompanying drawings, in which:
Fig. 1 shows a top elevation of a first embodiment of the fire-resistant sandwich plate; and Fig. 2 shows a cross-sectional elevation of the fire-resistant sandwich plate along line A-A in Fig. 1, wherein a portion of the sandwich plate is cut away in the centre.
The represented sandwich plate contains a first covering plate 2, a second covering plate 3, a core 1 disposed in between, and an edge strip 4 disposed between the first covering plate 2 and the second covering plate 3 and surrounding the core 1. The first covering plate 2 comprises five layers of wood 21-25, which are glued together, whilst the second covering layer 3 comprises five layers of wood 31-35, which are glued together. The covering plate 2 is glued onto the edge strip 4, which comprises six layers of wood 41-46, from above and the second covering layer 3 is glued on from below. Two adjacent layers of wood 21-25, 31-35, 41-46 of the covering plate 2, the covering plate 3 and the edge strip 4 each cross in the direction of the wood's grain.
Phenol resin adhesive, which has fire-retardant properties, is used as an adhesive. The fire-retardant effect is produced by inorganic, non-corrosive salts which are added to the adhesive bath.
Depending on the material used, fire classification S3 or even S4 according to DIN 5510 Part 2 can be attained for the entire sandwich plate.
The core 1 is completely enclosed by the covering plate 2, the covering plate 3 and the edge strip 4, and therefore does not need to be formed to be fire resistant. In the present case it comprises polyetherimide foam but can, for example, comprise polyurethane foam or PVC foam, balsa wood or a honeycomb plate comprising e.g. aluminium or aramid. Its purpose 4 is to guarantee high resistance to compression whilst having low weight. It will be appreciated that materials other than those mentioned above may be used to form the core.
In the present example, the core 1 is enclosed between the covering plates 2, 3 and the edge strip 4 formed of a plurality of layers of wood 41-46.
Naturally, it is also conceivable that it is enclosed by another fire-resistant material such as e.g. a foam or a thin covering strip.

Claims (12)

1. A fire-resistant sandwich plate with a first and a second covering plate (2, 3), between which a substantially lighter core (1) is disposed, characterised in that the covering plates (2,3) each have at least three closed layers of wood, glued to one another, and are formed so as to be fire-resistant, and that the core (1) is enclosed by fire-resistant material.
2. A sandwich plate according to claim 1, characterised in that the core (1) has a maximum density of 300 kg/M3, and preferably a maximum density of 160 kg /M3.
3. A sandwich plate according to claim 1 or 2, characterised in that the core (1) has a modulus of elasticity in the transverse direction to the covering plates (2, 3) of at least 1000 N/mm2, and preferably at least 4000 Nlrme.
4. A sandwich plate according to one of claims 1 to 3, characterised in that the core (1) comprises balsa wood.
5. A sandwich plate according to one of claims 1 to 3, characterised in that the core (1) comprises a foam.
6. A sandwich plate as claimed in claim 5, wherein said foam is formed from polyetherimide, polyurethane or PVC.
7. A sandwich plate according to one of claims I to 3, characterised in that the core (1) comprises a honeycomb plate.
8. A sandwich plate as claimed in claim 7, wherein said honeycomb plate is formed from aluminium or aramid.
9. A sandwich plate according to one of claims 1 to 8, S characterised in that an edge strip (4) is disposed around the core (1) and between the covering plates (2, 3), this edge strip (4) having at least three layers of wood (41-46) which are glued to one another, and being formed so as to be fire-resistant.
10 10. A sandwich plate according to claim 9, characterised in that the edge strip (4) is glued to the two covering plates (2, 3).
11. A sandwich plate according to one of claims 1 to 10, characterised in that the individual layers of wood (21-25, 31-35, 41-46) of the covering layers (2, 3) and optionally the edge strip (4) are glued with a fireretardant adhesive, preferably phenol resin adhesive. 20
12. A sandwich plate substantially as described herein with reference to the accompanying drawings.
GB0027419A 1999-11-12 2000-11-09 Fire-resistant sandwich plate Expired - Lifetime GB2356649B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE29919919U DE29919919U1 (en) 1999-11-12 1999-11-12 Fire retardant sandwich panel

Publications (3)

Publication Number Publication Date
GB0027419D0 GB0027419D0 (en) 2000-12-27
GB2356649A true GB2356649A (en) 2001-05-30
GB2356649B GB2356649B (en) 2004-01-21

Family

ID=8081548

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0027419A Expired - Lifetime GB2356649B (en) 1999-11-12 2000-11-09 Fire-resistant sandwich plate

Country Status (4)

Country Link
CH (1) CH693947A5 (en)
DE (1) DE29919919U1 (en)
FR (1) FR2801066B1 (en)
GB (1) GB2356649B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20009571U1 (en) 2000-05-25 2000-08-10 Fraunhofer Ges Forschung Tabular wood composite element
DE102004038024A1 (en) * 2004-08-04 2006-03-16 Complexx Gesellschaft für Messe- und Ausstattungsbau mbH Base plate for manufacturing repeatedly useable floor, has core bounded by a circular edge made of reinforcing material, cover units laminarily fixed at core, and coating layer applied on one cover unit`s upper side
DE102006058445B3 (en) 2006-12-10 2008-06-19 Moralt Tischlerplatten Gmbh & Co.Kg Lightweight panel and manufacturing process
DE202012105040U1 (en) 2012-12-21 2013-01-29 Swl-Tischlerplatten Betriebs-Gmbh plywood

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1601948A (en) * 1978-05-31 1981-11-04 Shapland & Petter Ltd Fire resistant panels

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1269244A (en) * 1968-09-30 1972-04-06 United Plastics Ltd Improvements in composite panels
US4072788A (en) * 1975-10-03 1978-02-07 Bayer Aktiengesellschaft Insulating elements for walls and ceilings
US4110513A (en) * 1976-10-04 1978-08-29 Johns-Manville Corporation Fire resistant plywood
DE3100094A1 (en) * 1980-07-11 1982-03-25 Oelkers, Wolfgang, 6531 Laubenheim Reinforcing core panels for a sandwich construction element
JPH0330902A (en) * 1989-06-27 1991-02-08 Matsushita Electric Works Ltd Inorganically treated ply wood
DE4238562A1 (en) * 1991-11-15 1993-05-27 Frank Dipl Ing Moeller Light sandwich plate - comprises two deck layers between which is core of vertically arranged plant stalks
FR2728005A1 (en) * 1994-12-12 1996-06-14 Bouygues Sa Coffering panel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1601948A (en) * 1978-05-31 1981-11-04 Shapland & Petter Ltd Fire resistant panels

Also Published As

Publication number Publication date
GB0027419D0 (en) 2000-12-27
GB2356649B (en) 2004-01-21
CH693947A5 (en) 2004-05-14
FR2801066A1 (en) 2001-05-18
DE29919919U1 (en) 2000-02-17
FR2801066B1 (en) 2002-06-21

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Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20201108