A method of producing a moulded article comprising a thermoset polymer and particles of porous natural materials, such as wood materials, and uses thereof. The composite material has a continuous matrix of a hardened thermoset polymer and, distributed within the matrix, and the particles are at least partially encased by the thermoset polymer. The method comprises the steps of providing a mould with two opposite pressing surfaces, said pressing surfaces defining a space between them; feeding particles of porous natural materials into the space between the pressing surfaces; advancing the surfaces towards each other to compress the particles in said space; feeding unhardened thermoset resin in liquid form into the mould so as to fill at least said space between pressing surfaces while keeping the particles compressed between the pressing surfaces; and curing the thermoset resin in the mould to provide a moulded composite article.

Described is a process of producing a multilayer lignocellulosic composite comprising one or more lignocellulosic composite layers or a single-layer lignocellulosic composite, wherein a high-frequency electrical field is applied and wherein a binder comprising for hardening the binder via esterification at least one, two or more compounds having two or more hydroxy groups and additionally one, two or more compounds having two or more carboxyl groups is provided or prepared. Furthermore described is a lignocellulosic com-posite, which is preparable according to said process, a construction product comprising such lignocellulosic composite and the use of such lignocellulosic composite as a building element in a construction product. Moreover is described a binder for producing a lignocellulosic composite.

Described is a process of producing a multilayer lignocellulosic composite comprising one or more lignocellulosic composite layers or a single-layer lignocellulosic composite, wherein a high-frequency electrical field is applied and wherein a binder comprising for hardening the binder via esterification at least one, two or more compounds having two or more hydroxy groups and additionally one, two or more compounds having two or more carboxyl groups is provided or prepared. Furthermore described is a lignocellulosic composite, which is preparable according to said process, a construction product comprising such lignocellulosic composite and the use of such lignocellulosic composite as a building element in a construction product. Moreover is described a binder, for producing a lignocellulosic composite.

An embodiment of the present disclosure provides fine cellulose fibers that satisfy, in measurement using an automatic fiber shape analyzer, all of (i) the length weighted average fiber length of fibers having a fiber length of at least 100 ?m is 110-500 ?m, (ii) the average fiber diameter is at most 42.5 ?m, (iii) the fine fiber area ratio is at most 90%, (iv) the number frequency of fibers having a fiber length of 20-56 ?m is at most 97% among fibers having a fiber length of less than 100 ?m, (v) the number frequency of fibers having a fiber length of at least 411 um is at most 54% among fibers having a fiber length of at least 100 ?m, and (vi) the average fiber diameter is 20-150 nm in terms of specific surface area.

The general inventive concepts relate to engineered wood products. The engineered wood products demonstrate improved properties including acoustic damping, fire resistance, and water absorption relative to similar engineered wood products that comprise only a single source of fibers. In contrast, the inventive engineered wood products include a combination of at least two types of fibers.

A building panel including a multi-layered substrate having a back side layer with lignocellulosic particles and a binder, an intermediate layer with lignocellulosic particles and a binder, arranged on the back side layer, and a front side layer with lignocellulosic particles and a binder, arranged on the intermediate layer. The building panel further includes a front side wood veneer element attached to the front side layer of the multi-layered substrate, and a balancing element attached to the back side layer of the multi-layered substrate. The back side layer was formed from a first mixture, the intermediate layer was formed from a second mixture and the front side layer was formed from a third mixture where lignocellulosic particles from the second mixture and lignocellulosic particles from the third mixture are mixed, at least in a border area between the intermediate layer and the front side layer.

A building panel, such as a floor panel, or wall panel, having a multi-layered substrate including a back side layer comprising lignocellulosic particles and a binder, an intermediate layer including lignocellulosic particles and a binder which is arranged on the back side layer, and a front side layer including lignocellulosic particles and a binder, and which is arranged on the intermediate layer. The back side layer was formed from a first mixture, the intermediate layer was formed from a second mixture and the front side layer was formed from a third mixture. The building panel further has a mechanical locking device arranged along at least one edge portion of the building panel where the mechanical locking device is configured for horizontal and/or vertical locking of similar or essentially identical building panels in an assembled position.

The present invention discloses a one-step integrally-formed bamboo sleeper. For the one-step integrally-formed bamboo sleeper, a bamboo unit is used as a raw material, to be dried and modified at the temperature of 110-180 C., and then subject to adhesive dipping, adhesive throwing, solidification, dopamine solution treatment, anti-mildew and/or anti-corrosion and/or anti-insect treatment, and fastening, to obtain the one-step integrally-formed bamboo sleeper with a density of 0.9-1.5 g/cm.sup.3. The present invention further provides a preparation method for the foregoing bamboo sleeper. The bamboo sleeper prepared in the present invention has a suitable elastic modulus, and applicable for ballasted tracks of railways and urban rail transit systems.

A fiber capsule and a method of compression molding a fiber-based packaging capsule, includes the steps: forming a raw capsule of a loosely bonded fiber mat, which capsule has an opening, positioning the raw capsule of the loosely bonded fiber mat on the inside of a substantially rigid mol having inner surfaces defining the molded outer surfaces of the fiber-based packaging capsule, compression molding the loosely bonded fiber mat by the insertion of a pressurizable compression member through the opening, and pressurizing the pressing device at a temperature of 150-250 degrees C.?, preferably 160-200 degrees C., and at a pressure of 100-5000 bar, preferably 300-1200 bar. The compression molding may take place by reshaping the reshaping pressing device and pressing the inside of the capsule against the inner surfaces of the rigid mold so that a cohesive fiber-based packaging capsule is obtained.

The general inventive concepts relate to engineered wood products. The engineered wood products demonstrate improved properties including acoustic damping, fire resistance, and water absorption relative to similar engineered wood products that comprise only a single source of fibers. In contrast, the inventive engineered wood products include a combination of at least two types of fibers.