A method for manufacturing a transparent heat-insulation building material from waste wood is provided. The method includes the following steps of: step S1, wood pretreatment, drying immersing, heating, adding a complexing agent solution, stirring, then drying the wood; step S2, wood acetylation treatment, loading the wood into a pressure vessel, adding acetylation fluid, reducing the pressure, and then pressurizing and raising a temperature; step S3, resin impregnating, adding a methyl methacrylate monomer solution and heating it, adding the methyl methacrylate monomer and benzoyl peroxide, bleaching the wood by hydrogen peroxide, and placing them in a vacuum permeator to allow the prepolymer liquid to penetrate into the wood and collecting the prepolymer liquid; and step S4, hot press molding polymerizing the wood in an oven and sleeving it into a heat press molding to obtain a densified wood.

The present invention is directed to a method for manufacturing a drylaid mat suitable for thermoforming. The present invention is directed to a dry forming process, wherein cellulosic or lignocellulosic fibers have been impregnated, but not cross linked, with a cross linking agent prior to forming in a dry forming method. The invention is also directed to dry-laid mats manufactured according to the method as well as to thermoformed products manufactured from such dry-laid mats.

The present invention relates to a process for preparing a modified wood product wherein the wood is treated with low-molecular weight resin based on lignin degradation products. The present invention also relates to a modified wood product produced using said process.

Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.

Methods for treating cellulosic materials comprising introducing a liquid treating composition into the cellulosic material, the treating composition comprising a solution prepared from at least: (i) one or more of a copper amine complex or copper ammine complex, such as copper tetraamine carbonate, (ii) one or more of ammonia or a water-soluble amine and (iii) water; and exposing the cellulosic material provided thereby to carbon dioxide and/or carbonic acid to provide treated cellulosic material, and treated cellulosic materials prepared thereby.

A device and a method for specifically influencing the technological properties of individual regions of a sheet-like material are provided, including the following steps: a) fixing the sheet-like material or a pre-compacted material nonwoven or a material fibre cake on a workbench, b) placing at least one applicator on the upper side and/or the underside of the sheet-like material, the material nonwoven or the material fibre cake, c) specifically moving the at least one applicator on the upper side and/or the underside and pressing an improving medium into partial regions of the sheet-like material, the material nonwoven or the material fibre cake in a predetermined amount and under a predetermined pressure, d) optionally, subsequently pressing the pre-compacted material nonwoven or the material fibre cake to form a sheet of the desired thickness.

A method for densifying a hygroscopic material is disclosed. The method is for hygroscopic material which may be a natural hygroscopic material or woodThe method comprises the steps of providing the hygroscopic material to be densified; pre-conditioning of the hygroscopic material by adjusting the moisture content of the hygroscopic material to a value within a predefined moisture range, if required; simultaneously heating and pressing the gas-tight packed hygroscopic material under predefined temperature and pressure conditions, whereby the moisture content of the hygroscopic material is kept constant; and obtaining a densified material.

In a method for treating wood, wherein a wooden body is impregnated with a polymerizable compound which is polymerizable by oxidation, the polymerizable compound is brought into contact with an oxidizer in the wooden body in order to polymerize the polymerizable compound in situ. The polymerizable compound applied therein comprises a heterocyclic compound with nitrogen and/or sulphur as heteroatom. The oxidizer is brought into solution and the wooden body is saturated with a solution of the oxidizer. The wooden body is subjected to a vapour phase of the heterocyclic compound under an increased pressure and the heterocyclic compound is polymerized in situ in the wood.

A two-part flame-retardant, a flame-retardant oriented strand (OSB) and method for forming a flame-retardant OSB is provided. The two-part flame-retardant composition includes an aqueous solution containing a water-soluble flame-retardant and a flame-retardant powder that is incorporated into an oriented strand board without substantially affecting the mechanical properties of the oriented strand board. The method includes applying the aqueous solution containing a water-soluble flame-retardant to an oriented strand board furnish and applying a flame-retardant powder to the wetted furnish, without requiring an additional drying step.

The present invention relates to improved methods of treating wooden materials. By the method of the invention, the wooden material is subjected to vacuum, overpressure and increased temperature, and subjected to ultrasound. Ultrasound is applied while the wooden material is covered by a liquid at a suitable overpressure and at a suitable temperature for a suitable period of time.