A part made from lignocellulosic material (10) is formed from a single sheet (11) of partially delignified lignocellulosic material impregnated with an impregnation polymer. The part (10) comprises at least one curved portion having a double curvature surface. The part made from lignocellulosic material is produced by a production method implementing a thermoforming step. Use in particular for producing wood veneer structures.

The present disclosure describes a treated cellulosic material comprising a cellulosic material having a porous structure defining a plurality of pores, at least a portion of the pores containing a treating agent comprising a polymer, the polymer comprising a polyurethane polymer. The present disclosure further describes a method for preparing a treated cellulosic material comprising providing a cellulosic material; and a first treatment protocol comprising impregnating the cellulosic material with an aqueous dispersion comprising a polymer, the polymer comprising a polyurethane polymer; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising a hydrophobic amine.

A method for preparing a treated cellulosic material comprising: providing a cellulosic material; a treatment protocol comprising impregnating the cellulosic material with an aqueous dispersion comprising a polybutene and a stabilizing agent.

A method for preparing a treated cellulosic material comprising: providing a cellulosic material; a first treatment protocol comprising impregnating the cellulosic material with an aqueous solution comprising a polymer, the polymer comprising a water-soluble polyetheramine; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising an aqueous dispersion comprising an epoxy-containing resin.

A method for preparing a treated cellulosic material comprising: providing a cellulosic material; a first treatment protocol comprising impregnating the cellulosic material with an aqueous solution comprising a polymer, the polymer comprising a water-soluble polyetheramine; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising an aqueous dispersion comprising an epoxy-containing resin.

A treated cellulosic material comprising: a cellulosic material having a porous structure defining a plurality of pores, the cellulosic material comprising wood including wood or wood composite materials, at least a portion of the pores containing a treating agent comprising: a polymer comprising a water soluble polyol; and a modifying agent comprising a hydrophobic polyalkylene polyol. A method for preparing a treated cellulosic material comprising: providing a cellulosic material; a first treatment protocol comprising impregnating the cellulosic material with a polymer, the polymer comprising a water-soluble polyol; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising a hydrophobic polyalkylene polyol.

A treated cellulosic material comprising: a cellulosic material having a porous structure defining a plurality of pores, the cellulosic material comprising wood including wood or wood composite materials, at least a portion of the pores containing a treating agent comprising: a polymer comprising a water soluble polyol; and a modifying agent comprising a hydrophobic polyalkylene polyol. A method for preparing a treated cellulosic material comprising: providing a cellulosic material; a first treatment protocol comprising impregnating the cellulosic material with a polymer, the polymer comprising a water-soluble polyol; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising a hydrophobic polyalkylene polyol.

A treated cellulosic material comprising: a cellulosic material having a porous structure defining a plurality of pores, the cellulosic material comprising wood including wood or wood composite materials, at least a portion of the pores containing a treating agent comprising: a polymer comprising a water soluble polyol; and a modifying agent comprising a hydrophobic polymer. A method for preparing a treated cellulosic material comprising: providing a cellulosic material; a first treatment protocol comprising impregnating the cellulosic material with a solution comprising a polymer, the polymer comprising a water soluble polyol; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising a hydrophobic polymer dispersed in an aqueous dispersion.

A treated cellulosic material comprising: a cellulosic material having a porous structure defining a plurality of pores, the cellulosic material comprising wood including wood or wood composite materials, at least a portion of the pores containing a treating agent comprising: a polymer comprising a water soluble polyol; and a modifying agent comprising a hydrophobic polymer. A method for preparing a treated cellulosic material comprising: providing a cellulosic material; a first treatment protocol comprising impregnating the cellulosic material with a solution comprising a polymer, the polymer comprising a water soluble polyol; and a second treatment protocol comprising impregnating the cellulosic material with a modifying agent, the modifying agent comprising a hydrophobic polymer dispersed in an aqueous dispersion.

A treated cellulosic material comprising a cellulosic material having a porous structure defining a plurality of pores, the cellulosic material comprising wood including wood or wood composite materials, at least a portion of the pores containing the reaction product of one or more of the following: a water soluble polyol, an epoxy-containing resin, a catalyst or curing agent, and the cellulosic material. A method for preparing a treated cellulosic material comprising providing a cellulosic material; a first treatment protocol comprising impregnating the cellulosic material with a water-soluble polyol; and a second treatment protocol comprising impregnating the cellulosic material with an epoxy-containing resin.