Fire resistant door system
OwnerChad A. Collison, Ken Majorsinventors
Life of this patent
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Abstract
A process for making a door structure and particularly a fibrous panel member for a subdoor structure. The process includes mixing a porous fiber material with a MDI adhesive. The fiber construct is compressed between a pair of porous belts. Steam and heat are applied to the compressed construct to form a bound flexible constructing material. The material is then placed within a door structure to form a fire resistant door.
Claims20
A method for producing a textile fiber construct for a fire resistant door defining a cavity comprising:
- a) providing textile fibers to a blowline;
- b) providing a polymeric MDI containing binder having a diisocyanate content of between about 8% and about 35%, by weight to the blowline to treat the fibers;
- c) at least partially drying the treated fibers;
- d) pressing the treated fibers to form a textile fiber construct;
- and
- e) placing the textile fiber construct into the cavity defined by the door.
A door structure consisting of:
- a hollow door formed of a frame and a door skin defining an internal cavity;
- an insulative textile member disposed within said cavity and said door skin, said insulative member consisting of a fibrous web layer of interlocked reinforcement fibers distributed substantially randomly in a first plane, said textile member comprising between 8% and 35% MDI and a fire retardant.
A door structure configured to be disposed on a subdoor, the door structure consisting of:
- a frame and a skin layer defining an internal cavity;
- an insulative textile member having a density of greater than 10 pounds per cubic foot disposed within said cavity and in contact with said skin, said insulative member consisting of a fibrous web layer of interlocked fibers and 15% to 20% by weight MDI adhesive.
Dependencies are inferred from the claim text.