13results about "Wood hardening process" patented technology

To provide natural wood material with improved strength and toughness.SOLUTION: Wood material is treated in a chemical process to partially remove lignin from cellulose-based natural wood material, in which cellulose nanofibers of cell walls are aligned. Then, the treated wood material is pressed in a direction intersecting a direction in which lumens extend, such that the lumens are destroyed and residual fluid in the wood material is removed.SELECTED DRAWING: Figure 4

The invention relates to methods for preparing modified wood and wood products, including methods to fortify wood by increasing the strength and / or density of wood so as to yield a fortified wood or wood product. The methods can be used to, for example, improve the performance, alter the appearance, and / or improve the durability of wood, and particularly, solid wood. The methods comprise a combination of resin and thermal treatments to yield modified wood and modified wood products.

The invention belongs to the technical field of floor manufacturing, and particularly relates to a composite floor heat treatment assembly line which comprises a rack and a heating mechanism, a cooling mechanism, a water absorption mechanism and an air drying mechanism which are sequentially arranged above the rack, the heating mechanism comprises a plurality of heating water tanks which are continuously arranged, and each heating water tank is connected with a steam pipe; a drying device is arranged behind each heating water tank, each drying device comprises a drying box and a brush roller arranged at the bottom of the drying box, the cooling mechanism comprises a cooling water tank, and conveying steel belts are arranged in the heating water tanks and the cooling water tank; an auxiliary conveying device used for increasing friction is arranged above the conveying steel belt, the water absorption mechanism comprises a set of rubber rollers and a set of sponge rollers, the mode of hydrothermal treatment, drying and then hydrothermal treatment is adopted, it is ensured that floors are evenly heated by controlling the water temperature, the problem that products are excessively heated to accelerate aging is solved, and the service life of the products is prolonged. And the stability of the floor is improved.

The invention provides a method of producing a piece of delignified wood having a porous structure, said method comprising: chemically treating a piece of natural wood to remove at least 90% of lignin from the natural wood while substantially retaining cellulose-based lumina of the natural wood, thereby producing a piece of delignified wood; after the removing, drying the piece of delignified wood by freeze drying or critical point drying, such that the cellulose-based lumina remain open or unobstructed in a cross-sectional view; and after the drying, further chemically treating the piece of delignified wood to be hydrophobic or resistant to weather or salt water, or forming or depositing a coating on exterior surfaces of the delignified wood. The unique microstructure and composition of the delignified wood can provide advantageous thermal insulation properties, among other advantages described herein.

The invention provides a method of producing a piece of delignified wood having a porous structure, said method comprising: chemically treating a piece of natural wood to remove at least 90% of lignin from the natural wood while substantially retaining cellulose-based lumina of the natural wood, thereby producing a piece of delignified wood; after the removing, drying the piece of delignified wood by freeze drying or critical point drying, such that the cellulose-based lumina remain open or unobstructed in a cross-sectional view; and after the drying, further chemically treating the piece of delignified wood to be hydrophobic or resistant to weather or salt water, or forming or depositing a coating on exterior surfaces of the delignified wood. The unique microstructure and composition of the delignified wood can provide advantageous thermal insulation properties, among other advantages described herein.

A piece of plant material (e.g., wood) can have a lignin content in a range of 5-16 wt %, inclusive, and a microstructure including native lumina bounded by cellulose-based cell walls extending in a first direction. The piece of plant material can be pressed along a second direction crossing the first direction, such that the lumina collapse and facing portions of the collapsed lumina are brought into contact with each other. The piece of plant material prior to the pressing can have a first density. After the pressing, the piece of plant material can have a second density greater than the first density, for example, at least 1 g / cm3.

A production method of at least one wood having a predetermined densification profile comprising at least one step of delignifying a piece of natural wood, so as to at least partially remove the lignin therein, and a step of thermo-compressing the delignified wood to obtain the densified wood. Furthermore, such a step of thermo-compressing the delignified wood comprises a plurality of sub-steps in which the delignified wood is subjected to a predetermined heating temperature and a predetermined compression, which vary so as to make the thermo-compression step variable accordingly.

The present invention relates to a method for producing a delignified and densified wood product. The wood is delignified in the form of a veneer using process conditions corresponding to the sulfate process. The wood veneer is subjected to a pre-hydrolysis treatment prior to a process step corresponding to the sulfate process. The invention also relates to a delignified and densified wood product produced using said method. The delignified and densified wood product according to the invention has particularly advantageous strength properties.

A rotary separation device deploys a drum with mesh like opening on the cylindrical surfaces and a removable cover or cap for filling in an upright position and removal of product or spent matter in an inverted position. When the drum is loaded with material, and the cover closed, it is rotatable to a horizontal position, and disposed in an outer container. The drum is rotated in the horizontal position to initiate the separation process. The outer container may be formed by the mating engagement at a common rim of an upper and lower vessel that form the sealed container.

The present invention is directed to a process for preparing a delignified and densified wood product. The wood is delignified in the form of veneers, using process conditions corresponding to the Kraft process. The wood veneers are subjected to a pre-hydrolysis treatment before the process steps corresponding to the Kraft process. The present invention also relates to a delignified and densified wood product produced using said process. The delignified and densified wood product according to the present invention has particularly advantageous strength properties.

The invention relates to a process for treating lignocellulosic material, preferably wood, comprising the following successive steps: (1) extraction of lignin by a fluid in supercritical or subcritical phase in order to extract from 40 to 85%, in % by weight, of the lignin from the initial material; (2) filling by a filling compound, preferably in the presence of a fluid in supercritical or subcritical phase.; and (3) finishing, so as to obtain a composite material formed of a three-dimensional network of filling compound converted and incorporated in a network of cellulose and of lignin.

A super strong and tough densified wood structure is formed by subjecting a cellulose-based natural wood material to a chemical treatment that partially removes lignin therefrom. The treated wood retains lumina of the natural wood, with cellulose nanofibers of cell walls being aligned. The treated wood is then pressed in a direction crossing the direction in which the lumina extend, such that the lumina collapse and any residual fluid within the wood is removed. As a result, the cell walls become entangled and hydrogen bonds are formed between adjacent cellulose nanofibers, thereby improving the strength and toughness of the wood among other mechanical properties. By further modifying, manipulating, or machining the densified wood, it can be adapted to various applications.

The present disclosure relates to the field of cosmetics. In particular, the present disclosure provides fragrance-dispensing emanating substrates and related methods for dispensing fragrance oils or liquid fragrance materials into an ambient environment.