The invention relates to a method for production of wood material articles with low emissions of chemical compounds. The applied wood is treated with bisulfite before bonding. On using formaldehyde resins in the bonding agent, wood material articles can be produced with the inventive method with extremely low formaldehyde emissions and very bright colours.

In some examples, one or more metal-containing catalysts and one or more waxes can be mixed or otherwise combined to produce an encapsulated catalyst composition. The wax can be at least partially coated on the metal-containing catalyst. A mixture of water and the wax can be agitated or otherwise mixed, and the metal-containing catalyst can be added to or otherwise combined with the water and wax mixture to produce a wax emulsified catalyst. A plurality of lignocellulose substrates, one or more oxidants, and the encapsulated catalyst composition can be mixed or otherwise combined to produce a lignocellulose binder mixture. The lignocellulose binder mixture can be heated to produce a composite product.

A method of manufacture of medium and high density fibreboard with moisture and mildew resistance and low formaldehyde emission, which includes the steps of: (a) providing wood chips; (b) pre-steaming; (c) refining the wood chips into fibers and adding 200-230 kg/m.sup.3 urea-formaldehyde resin adhesive, nigrosine solution with a mass percentage of nigrosine in absolutely dried fiber of 1-1.2%, 6-8 kg/m.sup.3 refined paraffin and 1.5-2 kg/m.sup.3 curing agent; (d) feeding activated carbon of 100-200 mesh to mix with the fibers and then drying the fibers to a water content between 8-10%; (e) separating qualified fibers to measuring silo; (f) laying the fibers onto a mat formation platform uniformly to form a fiber mat by pre-pressing; (g) pre-heating the fiber mat; and (h) processing continuous hot-pressing to form a raw board. The resulting fiberboard is black in color, has good physical properties and low formaldehyde emission rate.

The present invention provides a flexible high-density fiberboard which is essentially free of formaldehyde and isocyanates and comprises 70 to 90% by weight of straw fibers, and 30 to 10% by weight of a thermoplastic elastomer and one or more optional additive(s). Furthermore, the present invention provides a method for manufacturing such a flexible high-density fiberboard comprising the steps of providing straw fibers, providing a thermoplastic elastomer in powder form, optionally providing one or more additive(s), dry mixing the straw fibers, the thermoplastic elastomer powder and optionally the one or more additive(s), such that a mixture comprising 70 to 90% by weight of the straw fibers, and 30 to 10% by weight of the thermoplastic elastomer and one or more of the optional additive(s) is obtained, extruding the obtained mixture at a temperature such that the thermoplastic elastomer powder is in a molten state, and pressing the extruded mixture.

In some examples, one or more metal-containing catalysts and one or more waxes can be mixed or otherwise combined to produce an encapsulated catalyst composition. The wax can be at least partially coated on the metal-containing catalyst. A mixture of water and the wax can be agitated or otherwise mixed, and the metal-containing catalyst can be added to or otherwise combined with the water and wax mixture to produce a wax emulsified catalyst. A plurality of lignocellulose substrates, one or more oxidants, and the encapsulated catalyst composition can be mixed or otherwise combined to produce a lignocellulose binder mixture. The lignocellulose binder mixture can be heated to produce a composite product.

In some examples, a method for making a composite product can include combining a plurality of lignocellulose substrates, one or more complexed metal catalysts, one or more complexing agents, and one or more oxidants to produce a lignocellulose binder mixture and heating the lignocellulose binder mixture to produce a composite product. The lignocellulose binder mixture can have a molar ratio of the complexing agent to the complexed metal catalyst of about 0.1 or greater.

The disclosure relates to a process for manufacturing fiber boards with reduced VOC emissions.

Composite cellulosic products and processes for making same. In some embodiments, the composite cellulosic product can include a plurality of cellulosic substrates and an at least partially cured binder. Prior to curing, the binder can include a mixture formed by combining magnesium oxide, water, and magnesium chloride. A weight ratio of the magnesium oxide to the magnesium chloride in the binder can be at least 2.2:1 to 8.5:1.

The invention relates to a process for producing a lignocellulosic composite comprising one or more lignocellulosic composite layers. The process comprises S1) providing or preparing a mixture, at least comprising: lignocellulosic particles and a binder composition, the binder composition comprising as components at least: c1) one or more amino acid polymers having two or more primary amino groups and c2) one or more polyaldehyde compounds. The process further comprises S2) compacting the mixture from step S1) to receive a compacted mixture, and S3) applying heat and optionally pressure to the compacted mixture from step S2), so that the binder of the binder composition hardens and a lignocellulosic composite results. The invention further relates to the use of the lignocellulosic composite. Moreover, the invention relates to a kit for producing a binder composition, for use in the production of a lignocellulosic composite, and to the use of such binder composition.

Composite cellulosic products and processes for making same. In some embodiments, the composite cellulosic product can include a plurality of cellulosic substrates and an at least partially cured binder. Prior to curing, the binder can include a mixture formed by combining magnesium oxide, water, and magnesium chloride. A weight ratio of the magnesium oxide to the magnesium chloride in the binder can be at least 2.2:1 to 8.5:1.