The disclosure relates to a method for producing a wooden composite material board in particular an MDF or HDF board, wherein a cake made of wood chips or wood fibres wetted with a binder is spread, which is subsequently pressed in a hot press to form a board of a desired thickness, wherein, before the pressing, a mixed powder made of colour pigments and a second binder is spread onto an upper side of the cake as a primer, wherein the cake is sprayed with water after the spreading of the mixed powder.

Provided is a building material manufacturing apparatus and a building material manufacturing method that are suitable for efficiently manufacturing a building material while suppressing clogging of a sieve portion for sieving the building raw material. The building material manufacturing apparatus of the present invention includes, for example, a sieve portion 10 and a receiving tool 30. The sieve portion 10 includes a receiving and sending sheet 11 with no sieve openings, onto which the building raw material M is dropped, and at least one sieve sheet 12 with sieve openings that is located below the sheet. The receiving and sending sheet 11 and the sieve sheet 12 can perform undulating motion, are inclined, and are arranged side by side in the inclination direction. The receiving tool 30 is for receiving the building raw material M that has passed through the sieve openings of the sieve portion 10. In the building material manufacturing method of the present invention, for example, in a state in which the receiving and sending sheet 11 and the at least one sieve sheet 12 are performing undulating motion, the building raw material M is dropped onto the receiving and sending sheet 11, moved from the receiving and sending sheet 11 onto the sieve sheet 12, subjected to sieving by the sieve sheet 12, and the portion that passes through the sieve openings of the sieve sheet 12 is accumulated on the receiving tool 30, whereby a mat with at least one layer is formed.

The present invention provides a method for processing a molded tray based on bamboo-wood mixed shavings, comprising: extracting, crushing, mixing, drying, separating by wind separation, heat balance treatment, mixing glue, paving and hot pressing, cooling and grinding, inspecting and warehousing. In the invention, the industrial trays are manufactured by mixed bamboo and wood materials. The bamboo materials do not include bamboo peels and other impurities. The use of bamboo materials can improve the quality of trays from raw materials and reduce the moisture content of the trays. In addition, the brittleness of bamboo materials can improve the hardness of trays. The combined bamboo materials and wood materials can increase the toughness of the product and reduce the cost; furthermore, each link in the production process is elaborately designed and adjusted in the invention. The industrial trays made by the processing method of the present invention have increased the weight supporting capacity by at least 1.5 times compared to ordinary trays, and the product's service life is 3 to 5 years in normal uses (no water soaking, no overpressure).

The present invention provides a method for processing a molded tray based on bamboo-wood mixed shavings, comprising: extracting, crushing, mixing, drying, separating by wind separation, heat balance treatment, mixing glue, paving and hot pressing, cooling and grinding, inspecting and warehousing. In the invention, the industrial trays are manufactured by mixed bamboo and wood materials. The bamboo materials do not include bamboo peels and other impurities. The use of bamboo materials can improve the quality of trays from raw materials and reduce the moisture content of the trays. In addition, the brittleness of bamboo materials can improve the hardness of trays. The combined bamboo materials and wood materials can increase the toughness of the product and reduce the cost; furthermore, each link in the production process is elaborately designed and adjusted in the invention. The industrial trays made by the processing method of the present invention have increased the weight supporting capacity by at least 1.5 times compared to ordinary trays, and the product's service life is 3 to 5 years in normal uses (no water soaking, no overpressure).

[Object] To provide a building material having excellent durability.

[Solution] A building material has a convex part formed on a surface thereof, the convex part including a first lateral surface part and a second lateral surface part corresponding to the first lateral surface part. The building material is formed from a mixture containing a hydraulic material, an admixture, and a plant-based reinforcing material, and the plant-based reinforcing material at least in the convex part is distributed in the mixture with the hydraulic material and the admixture attached to the plant-based reinforcing material. A distribution of the plant-based reinforcing material in the first lateral surface part and a distribution of the plant-based reinforcing material in the second lateral surface part are substantially the same. Desirably, the convex part includes a first edge part that is an edge part of the first lateral surface part and a second edge part that is an edge part of the second lateral surface part and that corresponds to the first edge part, and a distribution of holes formed in the first edge part and a distribution of holes formed in the second edge part are substantially the same.

The disclosure relates to a method for producing a wood material panel with at least one layer with an inhomogeneous density profile, including the steps: scattering a multitude of wood particles to produce a particulate cake, pressing the particulate cake to form a layer of the wood material panel, and scattering different pre-determined quantities of wood particles in at least two areas within the particulate cake.

A sheet manufacturing apparatus suppresses material being left in a material supply conduit while manufacturing sheets with uniform grammage. A sheet manufacturing apparatus includes: a rotatable, foraminous drum unit; a web forming unit configured to form a web using material including fiber that has passed through the holes in the drum unit; and a material supply conduit having a connector that connects to the drum unit, and carrying material including fiber into the drum unit by air flow; the velocity of the flow in the connector being lower than the velocity of the flow on the upstream side of the connector.

An oriented polymer composition (OPC) article comprising a body having a length, which is greater than any perpendicular dimension, comprised of an OPC having a softening temperature, the body having an outer surface extending the length of the body, having polymer strands aligned in the lengthwise direction of the body, wherein the length dimension stability is greater than 99% when tested by heating the article for 24 hours at temperatures at least up to and including 71 degrees Celsius after completion of the manufacture of the article and processes for forming said article.

An engineered wood based siding, cladding or panel with a microstrand interface layer (MIL) applied to the top of the main strand matrix layers to minimize telegraphing, add rigidity and strength, and provide an improved surface appearance. The MIL comprises microstrands applied to the surface of the strand matrix or mat during production, prior to deposition of a fines layer. The MIL prevents the loss of fines into the strand matrix, and helps prevent or eliminate strand telegraphing.

A sheet manufacturing apparatus includes a drum unit having a plurality of openings, a web forming unit that has a deposition surface, on which material containing fibers that has passed through the openings is deposited, and forms a second web on the deposition surface, a sheet forming unit that processes the second web and forms a sheet, and a control unit that controls a basis weight of the second web deposited on the deposition surface in a direction crossing a transport direction of the second web.