Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1985-11-04
1986-07-22
Van Balen, William J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428285, 428484, 428920, 428921, B32B 1508, B32B 1706, E04B 194, E04C 226
Patent
active
046019430
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a fire proofing web with vapour barrier for covering roof and wall surfaces and the like comprising a carrier web and a flame proofing web which is applied thereto, comprising a glass fibre fleece with a content of crystalline-bound water.
STATE OF THE ART
Webs which are referred to as fire proofing webs are applied to roof structures and webs which do not constitute a `hard roofing` within the terms of German Industrial Standard (DIN) 4102 and which are therefore not resistant to flying or air-borne fire and radiant heat. Such fire proofing webs provide the desired `hard roofing`. The fire proofing webs are laid between the barrier or insulating material and a top layer. They are primarily used in the case of plastic foils or high-polymer webs. An example in respect of a `hard roofing` which is attained in that way is described in German laid-open application (DE-OS) No. 32 20 821.
It has also already been proposed (German patent application No. P 33 22 283.5) for flat roofs to be protected from fire from above by a fire proofing coating agent which contains elastomer bitumen. That fire proofing coating has a similar effect to a gravel or grit fill.
In relation to roofs and flat roofs, particularly when large areas are to be covered, a shaped steel plate is frequently used as a substructure. EPS-hard foam is predominantly used in that construction as an insulating or barrier material, for reasons concerned with the physical aspects of building. In that term, EPS denotes expanded polystyrene which is a thermoplastic material. Such plastic foam represents the optimum solution in regard to wind load, absorption of moisture, elasticity, good value and a good laying capability.
From tests carried out by IVH, Industrieverband Hartschaum eV, Heidelberg, and the North Rhine-Westphalia region, it is known that thermoplastic materials which are laid on shaped steel plates, as barrier or insulating materials, have a particularly advantageous behaviour in the initial phase of a fire. In the initial phase of a fire, they undergo sintering or flow and thereby absorb heat, thereby delaying the transmission of heat to the steel plate. It is stated in that respect that the temperature flows away upwardly. When the fire continues the roof skin however becomes increasingly heavily loaded. After the barrier or insulating material has burnt away or disappeared, the temperature strikes through. If the fire is allowed to continue for a prolonged period of time, the fire can burn through over an area of the roof. In the final phase of the fire when the steel plate collapses, it is then irrelevant whether the barrier material used was a melting thermoplastic material or a non-melting material.
In order to provide good endurance in respect of the middle phase of a fire, being a phase which occurs comparatively frequently, barrier or insulating materials comprising a non-melting material are being increasingly used. In the United States of America for example plasterboard panels or boards are laid on the shaped steel plates and EPS-boards are additionally laid on the plasterboard boards. That is effected in two working operations so that it is comparatively expensive. Furthermore, in order to comply with the requirements regarding the physical aspects of building, a vapour barrier generally has to be provided beneath the plasterboard panels.
It is also known for an aluminum foil which is coated with bitumen on both sides to be laid as a vapour barrier on the shaped steel plate. However, due to the bitumen coating, that foil construction burns easily and does not contribute to a fire proofing effect.
BRIEF DESCRIPTION OF THE INVENTION
Taking the foregoing considerations as the basic starting point, the object of the present invention is that of developing a roof web which forms both a fire proofing web and also a vapour barrier. In that connection, the fire proofing web should be such that in the event of a fire from below, the structure reliably prevents the fire from burning t
REFERENCES:
patent: 4310587 (1982-01-01), Beaupre
Haushofer Bert
Serwane Karl
Bobis Daniel H.
Jackson David A.
Van Balen William J.
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