An engineered wood based siding, cladding or panel with a pre-consolidated fines layer (PCF) applied to the top of the main strand matrix layers to minimize telegraphing and provide an improved surface appearance. The PCF is consolidated prior to application to the surface of the strand matrix or mat, and takes the place of a loose fines layer. The PCF prevents the loss of fines into the strand matrix, effectively keeping the fines at the surface so they can effectively and efficiently function to prevent or eliminate strand telegraphing, and provide a smooth finished surface for the product.

A method for producing environmentally friendly, coextruded hemp composite board (CHB) is provided. By using hemp fiber and hemp hurd in combination with virgin and/or recycled thermoplastics, the system and method may be used to create environmentally sound substitutes for traditional construction materials. The method generally comprises steps of obtaining hemp hurd/fiber and injecting said hemp hurd/fiber into an extruder along with a thermoplastic binder. Waste products from other production streams may be added as well to reduce waste/cost of said production streams. The resulting CHB is structurally superior to traditional construction materials largely due to the dispersed hemp hurd and hemp fiber, their encapsulation in a binder material and lower hygroscopic properties. Additionally, since the CHB is created using an extruder, a downstream extrusion arrangement may be used to mold the CHB into shapes that are difficult to achieve with traditional construction materials.

The present invention relates to a process for the production of lignocellulose materials via mixing A) of lignocellulose-containing particles or fibers, B) with organic isocyanate having at least two isocyanate groups or a mixture of these, and optionally with C) binders selected from the group of the phenol-formaldehyde resins, the aminoplastic resins, the protein-based binders, and other polymer-based binders, and mixtures of these, D) additives or a mixture of these, and E) plastics particles or a mixture of these, with the steps of: i.) scattering of the resultant mixture to give a mat, ii.) precompaction and heating of the mat during or after the precompaction process, and iii.) then hot pressing,
wherein, in the step ii.), operations are carried out at elevated temperature during and/or after the precompaction process, and a value of at least 4 cm is achieved for the resultant mat in the push-off test.

Methods of forming a lightweight reinforced thermoplastic core layer and articles including the core layer are described. In some examples, the methods use a combination of thermoplastic material, reinforcing fibers and bicomponent fibers to enhance retention of lofting agents in the core layer. The processes permit the use of less material while still providing sufficient lofting capacity in the final formed core layer.

A building panel with a surface layer including a wood veneer, a wood fibre based core and a sub-layer between the surface layer and the core. The sub-layer includes wood fibres and a binder. The surface layer has surface portions including material from the sub-layer. The surface portions including material from the sub-layer extend into the wood veneer.

A method of producing a veneered element, including providing a substrate, applying a sub-layer on a surface of the substrate, applying a veneer layer on the sub-layer, and applying pressure to the veneer layer and/or the substrate, such that at least a portion of the sub-layer permeates through the veneer layer. Also, such a veneered element.

A method for producing boards, wherein raw material (6) is provided and production steps are performed to obtain said boards, with half products formed during said production steps, wherein the productions steps comprise at least the following production steps: -a basic step wherein at least said raw material (6) is transported to a shaping unit (1); -a shaping step, wherein said raw material (6) is formed into plate shaped material to form a plate shaped half product (7); -a sawing step wherein said plate shaped half product (7) is sawn to board shaped half products (8); wherein these board shaped half products (8) are formed into respective boards, wherein, a number of boards is linked to a respective ID tag or comprises a respective ID tag, wherein said ID tags comprise individual data about parameters relating to production steps of said respective boards.