Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Patent
1977-09-26
1982-01-19
Smith, William F.
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
264121, 162190, D21C 324
Patent
active
043115551
ABSTRACT:
Method of producing fiberboard products according to the so-called dry method from lignocellulosic fiber material in which the fiber material discharged from a defibrating apparatus in an environment of steam is propelled in a stream of heated air to remove substantially all moisture therefrom. The thus dried fibers are deposited on an underlying moving perforated screen to form a mat in which the fibers are oriented at random while propellant air is evacuated therefrom. The thus formed mat is wetted by adding water thereto while it is being advanced by the screen into a hot press where the wetted fibers are compressed and bonded in their random orientation, with consequent removal of water. The amount of water added in the wetting step is proportioned to be effective in itself to bond the fibers without use of extraneous bonding or adhesive substance.
REFERENCES:
patent: 3801434 (1974-04-01), Carlsson
patent: 4012279 (1977-03-01), Selander et al.
patent: 4046622 (1977-09-01), Attwood et al.
Munson Eric Y.
Smith William F.
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