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A technology was developed to cast
cores for fire-resistant doors using a significant amount of de-inker
wastes from the recycled paper recovery process. Prototyping and burn
testing of doors manufactured were conducted. In testing, the door was
certified to a 60-minute burn test, passing both the fire and hose stream
portions of the test. Difficulties bonding the edge system to the door
core occurred, but slight modifications to the door manufacturing process
would resolve this issue.
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