Fire door core assembly

a core and fire door technology, applied in the field of doors, can solve the problems of inability to withstand the hose stream test in a 45-minute fire test, more difficult or impossible, and more expensive construction of higher rated fire doors, and achieve the effect of convenient and effective lamina
US20060096240A1Inactive Publication Date: 2006-05-112843 5816 QUEBEC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
2843 5816 QUEBEC
Publication Date
2006-05-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

A laminated fire door including a core, containing panels or boards made from an organic material including flax, and a fibrous binder constituting a sodium silicate adhesive, is used to make a door exhibits at least a 45 minute fire rating. In accordance with a preferred form of the invention, the fire door core is formed by using a silicate adhesive, preferably sodium silicate, in the order of 25 mils (0.6 mm) to laminate together two flax boards, each having a thickness in the range of 0.625-0.875 inches (approximately 16-22 mm), with each of the laminated flax boards having a density of between 20 and 45 pounds per cubic foot (320-700 kgs / m3).
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention pertains to the art of doors and, more particularly, to the construction of a door having a fire resistant core.

[0003] 2. Discussion of the Prior Art

[0004] Doors for commercial, and even domestic, applications are often rated for fire resistance. More specifically, fire doors are rated based on their ability to resist burning in the case of a fire, with standard ratings being defined as 20, 45, 60 and 90 minutes depending on the length of time a door can withstand a rating temperature, typically in the range of 1700+° F. The higher the minute rating, the better the fire rating. For instance, low rated fire doors are typically made from an organic material, while high rated fire doors are generally made from mineral or metal materials. More specifically, a 20 minute door typically includes a particle or stave board core. For 45, 60 and 90 minute ratings, a wood door generally has a mineral cor...

Claims

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