摘要:
The present invention relates generally to the timber products industry, and particularly to methods and apparatus for use in the manufacture of reconstituted or reconsolidated wood products. More particularly, the present invention relates to methods and apparatus for use in the manufacture of reconstituted or reconsolidated wood products using crushing and steam pressing methods and apparatuses.
摘要:
Composite panels and pulp, and paper products of the pulp, are produced from Arundo donax. In the fabrication of the composite panels, Arundo donax is comminuted to a suitable size, combined with a binder, and consolidated into panels that meet standards for construction and/or furniture grade panels. The Arundo donax particulates may be combined with wood particulates to produce a mixed furnish that can be used in the preparation of composite panels. Comminuted Arundo donax is treated, in conventional pulping processes, to produce a high tensile strength pulp that can be used in the production of paper. The pulp has a lighter color than wood pulp, and thereby uses less bleaching chemicals to achieve a desired whiteness. The pulp can be combined with wood pulp to produce a variety of products.
摘要:
The invention relates to a method for preparing natural fibre-based composite materials containing natural binders and powdery proteins, comprising the following steps; adding a powdery protein adhesive binder to natural fibres having a moisture content of 1 15%; mixing the natural fibres together with the powdery protein adhesive; adjusting the moisture content of the composition to 6 24% w/w; and submitting the mixture to a heat pressure treatment to form the natural fibre-based material.
摘要:
Methods for forming compressed and adhesively bonded structural beams of strands divided from wood waste, and the beams resulting from such methods, are disclosed.
摘要:
Composite panels and pulp, and paper products of the pulp, are produced from Arundo donax. In the fabrication of the composite panels, Arundo donax is comminuted to a suitable size, combined with a binder, and consolidated into panels that meet standards for construction and/or furniture grade panels. The Arundo donax particulates may be combined with wood particulates to produce a mixed furnish that can be used in the preparation of composite panels. Comminuted Arundo donax is treated, in conventional pulping processes, to produce a high tensile strength pulp that can be used in the production of paper. The pulp has a lighter color than wood pulp, and thereby uses less bleaching chemicals to achieve a desired whiteness. The pulp can be combined with wood pulp to produce a variety of products.
摘要:
A method of producing a consolidated composite wood product composed of discrete wood elements and a binder by forming a layup and preheating only a central longitudinal portion of the layup by application of microwave energy across the longitudinal axis and then pressing to consolidate the layup and applying further microwave energy in a direction perpendicular to the direction of the application of the preheating microwave energy through the sides of the compressed layup in the press.
摘要:
A mill is described for compacting agricultural fibrous matter, such as straw or other agricultural waste, into a structural board. The board is useful as a dominant part of a load bearing and insulating panel replacing many of the load bearing and insulating structures typically used to make small buildings, such as houses. The mill includes many features not found in previous mills of this type, including not only a packer to place material in front of an oscillating ram head as is known, but a precompactor arrangement to regulate the volume of material fed to the packer. Another feature incorporated into the mill to aid in achieving a consistent density is a pressure offset mechanism which adjusts the rate of core formation. The mill has a modular design to facilitate replacement of those components subjected to significant wear.
摘要:
Shaped bodies such as board can be made from a mixture of comminuted vegetable matter and an isocyanate binder by forming the mixture with a moisture content in excess of that required to cure the binder, then coating a support for the mixture with a layer of a liquid parting agent, depositing the mixture on the support, coating the mixture with another film of the parting agent and hot pressing the mixture to form the board.
摘要:
A method of refining wheat straw into fibers cuts the straw to a length of between about two and about four inches, wets the straw, softens the straw by subjecting the straw to pressurized steam and refines the softened straw in a pressurized mechanical refiner to produce fibers capable of being used in the manufacture of cellulosic board products. The straw fibers may be combined in any proportion to other fibers, such as wood fibers, and used in known dry, wet-dry, and wet board manufacturing processes to produce softboard, medium-density fiberboard, and hardboard products.
摘要:
A process and apparatus for forming a reconsolidated wood product, and a partially rended natural wood bundle therefor, comprises partially rending natural wood to form a plurality of flexible open lattice work webs each of naturally interconnected wood strands which are generally aligned along a common grain direction with a substantial proportion of the strands in each web being substantially discrete but incompletely separated from each other. Each web is of increased width laterally and correspondingly decreased thickness compared to the natural wood but they may vary in dry wood densities. To avoid this the webs are compacted widthwise to substantially uniform dry wood densities and this may involve weighing the webs and measuring their moisture content. The compacted webs are then abutted width-to-width and partially rended natural wood bundles of preselected widths and dry wood densities are cut from the mat. The bundles may then be at least partly superposed, compressed and bonded together to form the desired product.