2852results about "Lignocellulosic moulding material treatment" patented technology

A composite filtration medium web of fibers containing a controlled dispersion of a mixture of sub-micron and greater than sub-micron diameter polymeric fibers is described. The filtration medium is made by a two dimensional array of cells, each of which produces a single high velocity two-phase solids-gas jet of discontinuous fibers entrained in air. The cells are arranged so that the individual jets are induced to collide in flight with neighboring jets in their region of fiber formation, to cause the individual nascent fibers of adjacent jets to deform and become entangled with and partially wrap around each other at high velocity and in a localized fine scale manner before they have had an opportunity to cool to a relatively rigid state. The cells are individually adjusted to control the mean diameters, lengths and trajectories of the fibers they produce. Certain cells are adjusted to generate a significant percentage of fibers having diameters less than one micron diameter, and which are relatively shorter in length and certain other cells are adjusted to generate a significant percentage of structure-forming reinforcing fibers having diameters greater than one micron diameter which are relatively longer in length. By employing appropriate close positioning and orientation of the cells in the array, the sub-micron fibers are caused to promptly entangle with and partially wrap around the larger reinforcing fibers. The larger fibers thereby trap and immobilize the sub-micron diameter fibers in the region of formation, to minimize the tendency of sub-micron diameter fibers to clump, agglomerate, or rope together in flight. Also, the larger fibers in flight are made to form a protective curtain to prevent the sub-micron fibers from being carried off by stray air currents.

A composite filtration medium web of fibers containing a controlled dispersion of a mixture of sub-micron and greater than sub-micron diameter polymeric fibers is described. The filtration medium is made by a two dimensional array of cells, each of which produces a single high velocity two-phase solids-gas jet of discontinuous fibers entrained in air. The cells are arranged so that the individual jets are induced to collide in flight with neighboring jets in their region of fiber formation, to cause the individual nascent fibers of adjacent jets to deform and become entangled with and partially wrap around each other at high velocity and in a localized fine scale manner before they have had an opportunity to cool to a relatively rigid state. The cells are individually adjusted to control the mean diameters, lengths and trajectories of the fibers they produce. Certain cells are adjusted to generate a significant percentage of fibers having diameters less than one micron diameter, and which are relatively shorter in length and certain other cells are adjusted to generate a significant percentage of structure-forming reinforcing fibers having diameters greater than one micron diameter which are relatively longer in length. By employing appropriate close positioning and orientation of the cells in the array, the sub-micron fibers are caused to promptly entangle with and partially wrap around the larger reinforcing fibers. The larger fibers thereby trap and immobilize the sub-micron diameter fibers in the region of formation, to minimize the tendency of sub-micron diameter fibers to clump, agglomerate, or rope together in flight. Also, the larger fibers in flight are made to form a protective curtain to prevent the sub-micron fibers from being carried off by stray air currents.

The present invention provides a method for converting lignocellulosic material into biofuel. In particular embodiments, the method comprises pre-treating lignocellulosic material by dissolving the material in ionic liquids. The pretreated lignocellulosic material can be isolated, such as by precipitation with a regenerating solvent (e.g., water), and be used directly in the formation of biofuel, including undergoing hydrolysis to form sugar and fermentation to form fuel, such as bioethanol. The ionic liquid can be recycled for further use, such as by evaporation of the water introduced during precipitation, and the recycling provides a route to a hemicellulose rich fraction and an ionic liquid of consistent quality and wood dissolution characteristics. The recovered hemicelluloses are of significant utilization potential toward commodity and specialty applications.

An apparatus and method for forming tow-based absorbent structures having a single casing sheet are disclosed. The apparatus has a tow supply mechanism for providing tow material, a particulate matter supply mechanism for providing particulate matter, and a casing sheet supply mechanism for providing casing sheet material. The apparatus also has a vacuum draw roll having a foraminous center surface that has a width defined by a first edge and a second edge and is rotatable about a first axis. The vacuum draw roll is positioned to receive the tow material, the particulate matter and the casing sheet material to form a open core composite supply. The apparatus also has one or more angled surfaces positioned to create one or more obtuse angles in the open core composite supply, and one or more folders to further fold the one or more obtuse angles in the open core composite supply to form a folded core composite supply.

A box for shipping temperature sensitive or perishable goods made from a double walled combined web having an inside barrier layer, a first paper liner bonded to the inside barrier layer, a first paper flute medium bonded to the first paper liner, an outside barrier layer, a second paper liner bonded to the outside barrier layer, a second paper flute medium bonded to the second paper liner, and a sandwich of a barrier layer bonded between third and fourth paper liners. The flute mediums are bonded, respectively, to the third and fourth paper liners.

The double bag vacuum infusion process of the present invention provides a low cost method for producing complex composite assemblies without an autoclave. It also enables the production of highly innovative structures. The quality of the composites produced using such an infusion process are comparable to composites made using prepregs, hand layup or fiber placement, and autoclave curing. Double bagging provides vacuum integrity, controls bag relaxation while flow media controls the flow front to allow high quality aerospace-grade products.

A method of manufacturing a separate and continuous layer being essentially uncured. The method includes applying a powder mix including fibres and a thermosetting binder on a carrier, forming a powder mix layer, wherein the powder mix is connected together such that the powder mix layer is obtained and wherein the powder mix layer is essentially uncured, and releasing the powder mix layer from the carrier. Also, a layer and a method for manufacturing a building panel.

A flexible structure includes a plurality of starch filaments. The structure includes at least a first region and a second region, each of the first and second regions having at least one common intensive property selected from the group consisting of density, basis weight, elevation, opacity, crepe frequency, and any combination thereof. The common intensive property of the first region differs in value from the common intensive property of the second region.

Polymers that have extremely high melt viscosities are very difficult to extrude and stretch making it difficult to synthesize fibers of such polymers via conventional methods. A process is provided for producing a polymer fiber which involves blowing a mixture of a polymer and a gas through a nozzle such that polymer micro- and / or nano-fibers are produced. The polymer fibers are characterized in that they have a diameter less than the diameter of the outlet aperture of the nozzle.

A forming box for use in dry forming of a mat of fibrous material, and a forming method. The forming box comprises a housing with an open bottom providing direct access for fibers onto an underlying forming wire and a vacuum box underneath said forming wire; an inlet for supplying fiber material into the inside of the housing; and a number of fiber separating rollers in one or more rows in the housing between the fiber inlet and the housing bottom. An endless belt screen is provided inside the housing having an upper run between two rows of spike rollers and a lower run closer to the open bottom of the forming box. Fiber clumps captured on the lower run of the belt screen are conveyed above fiber separating rollers and are released from the upper run of the belt screen into contact with the fiber separating rollers.

A manufacturing method for providing a cement bonded wood chip product, a resin bonded wood chip product and a simulated wood product, in which recycled wooden members and recycled resinous members are pulverized after having been mixed. Accordingly, a mixing process and a pulverizing process can be integrated into one single line, reducing the space as well as laborious work and efficient operation in a plant. A manufacturing method of a simulated wood product utilizing pulverized powders obtained from recycled building members as raw material, in which the building members comprise recycled wooden members made of wooden materials and resinous members made of resinous materials, the manufacturing method further comprising a mixing process for mixing the recycled wooden members, a pulverization process for pulverizing the mixed materials obtained in the mixing process to form pulverized powder, a kneading process for kneading the pulverized powders obtained by the pulverizing process, and a molding process for molding the kneaded materials obtained in the kneading process either by an extrusion or injection molding.

Melt blown nonwoven webs are formed by supplying attenuating fluid to a meltblowing die through an attenuating fluid distribution passage whose distribution characteristics can be changed while the die and manifold are assembled. By adjusting the distribution characteristics of the passage, the mass flow rate of attenuating fluid to channels in the meltblowing die and the temperature of the attenuating fluid at the die outlets can be made more uniform.

Reduced aldehyde emissions during heated storage of a polyurethane resin are obtained by including at least one sulfurous compound selected from the group consisting of hydrogen sulfites and disulfites in the polyol component from which that polyurethane is produced. The amount of the sulfurous compound added is generally from 0.02 to 2.0 parts by weight for every 100 parts by weight of the polyol component.

A method of manufacture of a nonwoven cellulose fabric is disclosed. The fabric is made from fibers formed by extrusion of a solution of cellulose through a spinning jet. The extruded fiber is attenuated with a high velocity gas flow, and the attenuated fiber is collected on a surface (such as the curved surface of a rotating drum) on which the fiber web is subsequently coagulated. Apparatus for carrying out the method is also disclosed. The method and apparatus permit the manufacture of a nonwoven lyocell fabric web in which fibers are bonded together without the use of a binder.

A super absorbent distribution system for homogenous distribution throughout an absorbent core is disclosed. A super absorbent material is injected into a stream of absorbent fluff at an opposite direction to that of the stream of absorbent fluff. The super absorbent is blasted into the peak and outer surface of a cone shaped super absorbent barrier. The oncoming absorbent fluff also contends with a similarly shaped absorbent fluff barrier. The super absorbent material slows down as it hits the super absorbent barrier and oncoming fluff, then stops, then reverses direction and flows with the absorbent fluff as a homogenous distribution of super absorbent material and absorbent fluff. The combination of super absorbent material and absorbent fluff may encounter baffle members to further distribute the super absorbent material and absorbent fluff.

A manufacturing method of an electret processed product, comprising the steps of allowing a section nozzle (22) to come into contact with a nonconductive fiber sheet (S) so as to cross in the lateral direction of the sheet while running the sheet, allowing the surface of the sheet on the opposite side of the contact portion to come into contact with or to immerse into a water surface, sucking water from the suction nozzle (22) so that the water can be passed through the sheet in the thickness direction of the sheet to penetrate the water into the nonconductive fiber sheet (S), and drying the nonconductive fiber sheet (S), whereby a high quality and high performance electret processed product can be manufactured at a low cost.

Disclosed is a water disintegratable sheet of which fibers are hydroentangled about each other. The water disintegratable sheet includes: at least one kind of primary fibers having a fiber length of at most 10 millimeter; and bast / leaf fibers having a Canadian Standard freeness value of at most 600 milliliter and a fiber length of at most 10 millimeter.

A process for producing a thermoformable fibre-plastics composite product comprising lignolcellulosic or natural fibres, particularly but not exclusively useful as an intermediate product in subsequent manufacture, comprises conveying the fibres in a dry or wet air stream and applying to the fibres a thermoplastic binding agent, and forming the fibres into a solid or semi-solid product such as a panel, which is thermoformable. In at least a preferred embodiment the process may be carried out in known plant for manufacture of medium density fibre board.

Method and system using near infrared (NIR) spectroscopy for dynamically monitoring and controlling the proportion of resin solids or other additive solids in combination with other ingredients used in continuous production of resin-wood composite articles.

A super absorbent distribution system for homogenous distribution throughout an absorbent core is disclosed. A super absorbent material is injected into a stream of absorbent fluff at an opposite direction to that of the stream of absorbent fluff. The super absorbent is blasted into the peak and outer surface of a cone shaped super absorbent barrier. The oncoming absorbent fluff also contends with a similarly shaped absorbent fluff barrier. The super absorbent material slows down as it hits the super absorbent barrier and oncoming fluff, then stops, then reverses direction and flows with the absorbent fluff as a homogenous distribution of super absorbent material and absorbent fluff. The combination of super absorbent material and absorbent fluff may encounter baffle members to further distribute the super absorbent material and absorbent fluff.

The invention provides a crop straw medium density fiberboard by natural gum. Raw materials of the medium density fiberboard comprise crop straw fiber, a bonding agent, a waterproof and lubricating agent and a flame retardant, wherein the bonding agent is natural gum and comprises plant gum and animal gum; the waterproof and lubricating agent is natural wax, stearic acid or stearate; and the flame retardant is non-toxic and harmless flame retardant. The mixture ratio for all the raw materials by weight percent is: 75 to 93 percent of the crop straw fiber, 1 to 8 percent of the bonding agent (dried), 0.5 to 8 percent of the waterproof and lubricating agent, and 5.5 to 23.5 percent of the flame retardant. All the raw materials are produced into a finished product through mixing, sizing, spreading, prepressing, hot pressing and edge cutting; and microwave is used for auxiliary heating in the hot pressing phase. The crop straw medium density fiberboard by the natural gum can realize complete degradation under natural condition after the medium density fiberboard is abandoned or destroyed without any nonreversible destruction to the environment, so the production and application of the crop straw medium density fiberboard realize complete sustainability and recyclability, and have significant realistic and historic significance.

The invention provides a smooth surface wood oriented structure flakeboard and a preparation method used for the flakeboard, belonging to the technical field of artificial board, and more particularly relates to a modified wood oriented structure flakeboard and a preparation method of the flakeboard. The smooth surface wood oriented structure flakeboard of the invention is formed by the bonding of a surface layer, a core layer and a bottom layer; the core layer structure is the wood oriented structure flakeboard (OSB); the flakeboard is characterized in that the surface layer and the bottom layer are wood fine layers. The preparation method of the invention comprises the steps as follows: a wood slicing, grinding and fibre separation device is added at the front section of the preparation production line so as to manufacture and produce certain wood fine materials; the fine materials are dried, screened and chosen to carry out the sizing operation; subsequently, a paving machine is respectively arranged at the front section and the final section of the paving production line; a fine material layer is added at the surface layer and the bottom layer before the OSB is formed; subsequently, the hot extruding and plain plate disposals are carried out so as to prepare the flakeboard with smooth and flat surface.