Steam-assisted paper impregnation
AssigneePaper Technology Foundation Inc.
InventorsCHARLES JOHN GILFERT, DIMITRIS IOANNIS COLLIAS, STEVEN MICHAEL SCHENNUM
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Abstract
The present invention relates to a process of using steam to achieve simultaneous impregnation and drying of lignocellulosic material to improve the strength of lignocellulosic material and to reduce the number of serial processing steps. The steam may be either indigenously generated by way of a heated press or heated nip, or the steam may be externally applied.
Claims27
A process of using exogenous steam to achieve simultaneous impregnation and drying of lignocellulosic material comprising the steps of:
- a) treating a lignocellulosic material an additive;
- and
- b) applying steam to said treated lignocellulosic material.
A process of using indigenous steam to achieve simultaneous impregnation and drying of lignocellulosic material comprising the steps of:
- a) treating a lignocellulosic material with an additive, said treated lignocellulosic material containing moisture;
- b) placing said treated lignocellulosic material into a heated press;
- c) applying heat and pressure from said heated press while providing venting means;
- and
- d) removing said treated lignocellulosic material from said heated press.
A process of using indigenous steam to achieve simultaneous impregnation and drying of lignocellulosic material comprising the steps of:
- a) treating a lignocellulosic material with an additive, said treated lignocellulosic material containing moisture;
- b) introducing said treated lignocellulosic material into a heated nip;
- c) applying heat and pressure from said heated nip while providing venting means;
- and
- d) removing said treated lignocellulosic material from said heated nip.
Dependencies are inferred from the claim text.