813 results about "Hardwood" patented technology

An absorbent sheet of cellulosic fibers includes a mixture of hardwood fibers and softwood fibers arranged in a reticulum having: (i) a plurality of pileated fiber enriched regions of relatively high local basis weight interconnected by way of (ii) a plurality of lower local basis weight linking regions whose fiber orientation is biased along the machine direction between pileated regions interconnected thereby, wherein the sheet exhibits a % CD stretch which is at least about 2.75 times the dry tensile ratio of the sheet. Tensile ratios of from about 0.4 to about 4 are readily achieved.

One aspect of the invention relates to a process, comprising treating lignocellulosic biomass according to a first pretreatment protocol, thereby generating a first product mixture; separating the first product mixture into a first plurality of fractions; and treating at least one fraction of said first plurality of fractions according to a second pretreatment protocol, thereby generating a second product mixture. In one embodiment, the lignocellulosic biomass is selected from the group consisting of grass, switch grass, cord grass, rye grass, reed canary grass, miscanthus, sugar-processing residues, sugarcane bagasse, agricultural wastes, rice straw, rice hulls, barley straw, corn cobs, cereal straw, wheat straw, canola straw, oat straw, oat hulls, corn fiber, stover, soybean stover, corn stover, forestry wastes, recycled wood pulp protocol protocol fiber, paper sludge, sawdust, hardwood, softwood, and combinations thereof.

Door and glazing frames include intumescent material positioned in a dado that is formed in a jamb side surface. Trim materials are positioned over the intumescent material to improve the appearance of the frame and to prevent tampering with and damage to the intumescent material. The jamb trim is preferably made of a cut hardwood panel having a thickness that allows heat to be transmitted to the intumescent material in the event of a fire so that the intumescent material will expand and fill a clearance space between the frame and the door or glazing. The expanded intumescent material inhibits the transmission of smoke and heat between the door and door frame. After expanding, the intumescent material will char and solidify, which may provide an added benefit of structural support for the door and or glazing.

The invention provides a tie-to-tree dendrobium officinale cultivation method, comprising the steps of seedling tissue-culture breeding, tissue-culture seedling acclimatization and tie-to-tree cultivation of acclimatized seedlings. The step of tissue-culture seedling acclimatization comprises selection of bottled tissue-culture seedlings, selection and arrangement of a seedling acclimatization medium, selection of seedling acclimatization fertilizer, planting and after-planting management and is characterized in that the seedling acclimatization medium consists of hardwood sawdust and broken stone mixed in a mass ratio of 6.5-7.5:2.5-3.5, and the seedling acclimatization fertilizer is organic fertilizer prepared by fermenting herbivorous animal waste. The step of tie-to-tree cultivation of acclimatized seedlings comprises selection of acclimatized seedlings, selection of cultivation forest land, selection of variety of trees to be tied, seedling tying up and planting management. The tie-to-tree dendrobium officinale cultivation method provided by the invention has the advantages of low planting cost, easiness in management, high survival rate and long harvesting period; moreover, the harvest products have high quality.

The present invention is a hardwood flooring board including a middle layer formed from a non-hardwood flooring material and a hardwood material upper layer which is secured to an upper surface of the middle layer that is thick enough to include decorative designs. The middle layer forms between 45% and 75% of the overall material of the board and enables the board to be manufactured to be more dimensionally stable, i.e., wider and longer, than conventional hardwood flooring boards such that the boards can be more uniformly constructed. Also the use of the non-hardwood material in the middle layer greatly increases the dimensional stability and long term performance of the flooring boards, while providing a genuine hardwood appearance to the floor. The board also includes a lower layer that can be formed from either a hardwood material or a non-hardwood material to function as a base for the board. The upper layer is secured to the middle layer by an adhesive that is urged into the openings or cracks in the upper layer during the assembly of the board to prevent the cracks from spreading through the upper layer when the boards are in use.

The present invention relates to a process of producing a cellulosic product comprising (i) providing an aqueous suspension of cellulosic fibers, (ii) adding microfibrillar polysaccharide, (iii) adding thermoplastic microspheres, (iv) dewatering the suspension and forming a cellulosic product. The invention also relates to a process of producing a single layer cellulosic product comprising (i) providing an aqueous suspension of cellulosic fibers, (ii) adding microfibrillar polysaccharide derived from softwood and/or hardwood and optionally adding thermoplastic microspheres to the suspension, (iii) dewatering the suspension and forming a cellulosic product. The invention further relates to a cellulosic product obtainable from said processes. The invention also relates to a composition comprising microfibrillar polysaccharide and thermoplastic microspheres and the use thereof.

The invention discloses a method of hardwood cutting propagation of Qilian Juniper, which is characterized in that, annual hardwood of the Qilian Juniper having the age ranges from seven years to ten years is cut as branches; the average length of the branches ranges from 14.0cm to 18.0cm; the average diameter of the branches ranges from 3.0mm to 5.0mm; on the last ten days of April of each year, the branches are inserted into a greenhouse for seedling; the cutting medium is the mixture of peat and perlite mixed according to the proportion of 1:1; the cutting medium is firstly formed into a medium sausage having the length ranging from 13cm to 16cm; then the cutting medium is put in a 58 x 32cm tray and is put on the cutting bed in the greenhouse. The breeding of Qilian Juniper is realized by the method of hardwood cutting propagation. The method has the advantages of reduced seedling period of Qilian Juniper, saved cost and remarkable effect.

The present invention relates to a process for the production of xylose and dissolving pulp from xylan-containing biomass, such as hardwood. The invention is based on prehydrolysis of the xylan-containing biomass with SO₂ in specified conditions, followed by chromatographic fractionation, nanofiltration or precipitation crystallization of the xylose-containing prehydrolyzate to obtain a xylose product having a xylose content of at least 55% on DS. The dissolving pulp obtained from the process can be used for example for the production of viscose.

The invention provides a method for manufacturing reconstituted wood. Rotary cut is carried out on the raw wood for preparing a veneer or a veneer strip, defibering is carried out on the veneer, the forming points and/or wood bunch shades or wood bunches of striation crack are formed along the natural texture of wood on the veneer, then dipping, drying and hot pressing for molding the reconstituted wood are carried out. Compared with the prior art, the method of the invention solves the problem that wood bunch is irregular; the rate of utilizing wood and production efficiency of wood bunch are improved; defibering process is simplified and energy consumption for defibering is lowered. The process facilitates the cracks on the wood bunch shades and wood bunches to be very even and facilitates the dipping of wood bunch shades or wood bunches to be very even in the following dipping process; the product problems such as warp, deformation, jump fibre, and the like, are overcome, which are aroused by uneven defibering in making wood bunches from raw wood directly in the prior art, and the boards that the surface is very smooth, the mechanical performances such as stiffness and intensity, and the like, are higher than the raw material itself are made, therefore the fast-growing forest wood with worse performances and wider source can be made into the products of reconstituted wood which can compare beauty with noble hardwood.

The invention discloses white-surface coated craft paper and a production method thereof. The white-surface coated craft paper comprises a core paper layer; the upper side of the core paper layer is a surface paper layer, and the lower side is a bottom paper layer; a coating layer is arranged on the upper surface of the surface paper layer; the bottom paper layer and the core paper layer of the white-surface coated craft paper are prepared by the steps of: dosing the waste paper, preparing waste paper pulp to obtain non-deinked waste paper pulp, and manufacturing paper through a paper layer to obtain a wet bottom paper layer and a wet core paper layer; the surface paper layer is prepared by the steps of: mixing the bleached hardwood pulp, bleached softwood pulp and bleached regenerated fiber pulp DIP at any proportion, and manufacturing paper through a paper layer to obtain a wet surface paper layer; and the wet bottom paper layer, the wet core paper layer and the wet surface paper layer are subjected to the steps of compounding with the coated body paper, preliminary drying, sizing, later drying, paper surface calendering, paper surface coating and after-treatment to obtain the white-surface coated craft paper. The available waste paper types are increased, and the fiber source is wider; and meanwhile, the quality of the waste paper pulp is effectively stabilized so as to guarantee the quality stability of the coated body paper and the white-surface craft paper and avoid easy layering, splitting and scaling.

An improved fabricated hardwood flooring product providing the advantage of a thick wood wear layer similar to a traditional ¾ inch solid wood floor with the dimensional stability characteristics of engineered wood floor products.

The invention discloses a food wrapping paper and a production method thereof. Poplar chemical mechanical pulp, bleached kraft softwood pulp and bleached kraft hardwood pulp are used as fiber raw materials. Sizing, desanding and degassing, sizing, fine sieving, wire dehydration forming, pressing, pre-drying, surface sizing, post-drying, calendering, coiling, and packaging to form food packaging paper. The present invention uses the surface sizing treatment method to process the product, and adds a starch surface sizing agent to the surface sizing to improve water resistance and adds a small amount of sizing agent alkyl ketene dimer to the surface sizing glue, which can Improve the retention rate, save costs, and make products more cost-effective.

The invention belongs to the technical field of plant agamous propagation and provides a method for raising seedlings of llex integra by cutting, which solves the technical problem that the conventional agamous propagation of the llex integra is difficult. The method comprises the following steps of: shearing spikes of a one-year-old half-lignified branch or an annual half-lignified hardwood branch, soaking the sheared one-year-old half-lignified branch or annual half-lignified hardwood branch into a blended hormone solution of an NAA, a DMSO and a VC or a PVP, inserting the soaked one-year-old half-lignified branch or annual half-lignified hardwood branch into a substrate prepared by mixing turf, vermiculite and perlite, and performing rooting culture management in a small sealed row cover. The technique for raising seedlings by cutting provided by the invention fulfils the aims of high rooting rate and simple operation and solves the problem that the agamous propagation of the llex integra is difficult. The obtained nursery stocks are excellent in quality and can adapt to the climatic environment in most parts of the Yangtze River Delta in China. The method of the invention has very important function and significance for the protection and reasonable development and use of the llex integra resource.

The invention provides a washing process in the grass pulping. It contains the following steps: A) send the cooked pulp into the presser for pressing to get the coarse pulp. B) Process the coarse pulp through the jumping screen. C) Send the screened pulp into the pulp washer for washing. The rigidity of the screened pulp is potassium permanganate value 16-28 (equals to karber value 24-50). The washed solvent remains 90-150ppm. Take the high rigidity pulp in this invention as materials to prepare bleaching chemical pulp by pressing and washing. The whiteness of the chemical pulp is 68-82%ISO and the removal rate of the lignin is 84-98%. The quality of the bleaching chemical pulp prepared by the grass is similar, even better than that of the exciting hardwood pulp.

A connector system for mechanically connecting two structural elements to each other, consisting of a connector element and mating grooves in each structural element. The connector element is comprised of a base plate having a split-tongue element at each side or end of said base plate. Each joined element has a mating groove formed into its connector-receiving surface. The mating groove is designed to allow fabrication via four sequential circular saw cuts, without loss of saleable decorative surface, and at a rate consistent with economical commercial production of vinyl, laminate, or hardwood flooring. The connector element is readily extruded in a variety of polymers, including PVC. The connector and mating grooves interact so as to generate a force component acting to forcibly draw the connector into the mating grooves. The connector system operation is relatively insensitive to geometric deviations associated with normal manufacturing methods.

A pneumatic mallet-blow operated fastener driving tool for securing hardwood planks to a subfloor, which comprises a fastener discharge mechanism in turn comprising a housing having a pressurized main chamber in direct link with a compressed air intake, a selectively depressurizable closure chamber pressurized when the tool is at rest, and a cylinder in which a piston having a plunger affixed thereto is slidably mounted. A valve, biased toward a closed position when the closure chamber is pressurized, or biased towards its open limit position if the closure chamber is depressurized, permits selective establishment of fluid communication between the inside of the cylinder and the pressurized main chamber. The piston, at a retracted limit position when the tool is at rest, is forced towards a deployed limit position when fluid communication is established between the main chamber and the inside of the cylinder, in order for its plunger to strike a fastener and drive it into an underlying plank. In use, after the mallet blow has engendered depressurizing of the closure chamber, the valve is moved in its open limit position, a fastener is discharged from the tool upon being struck by deployment of the piston by being struck by its plunger, and closure chamber starts to become pressurized again by compressed fluid flowing therein from the main chamber through a first fluid inlet, which initiates movement of the valve towards its closed position, and after such movement is initiated, a second fluid inlet port opens up to further admit compressed air into the closure chamber and thus accelerate pressurizing of the closure chamber and displacement of the valve towards its closed position.

The invention belongs to the technical field of material and transport, and relates to a composite material for a container base plate and a preparation method thereof. The composite material is a sandwich structure, and comprises a core layer and cover panels covering on upper and lower surfaces of the core layer, wherein the core layer is glass-felt-reinforced thermoplastic composite panel, the cover panels are thermoplastic resin and fiber reinforced thermoplastic sheets made from fibers. The composite material can reasonably select thickness and density of the covering surfaces and core materials according to actual needs, so as to reach optimum economic and weight-loss effects. The composite material is good in wear resistance, corrosion resistance, non-absorbent, and easy to clean; and compared with hardwood base plates, is greatly improved in service life. In addition, the composite material base plate is prepared all by fibers and plastic, free of corrosion and bacteria, and not damaged by insects; during preparation, no adhesive is used, and no formaldehyde is released, and thus the material is completely harmless, green and environmentally protective.

The invention discloses an apocarya hardwood cutting seedling raising method. The method comprises the steps of selecting a 12cm long middle section twig and a 12cm long lower section twig of an annual apocarya seedling, soaking the trimmed twigs in a solution of phytohormone IBA (Indolebutyric Acid) or NAA (Naphthaleneacetic Acid) for 4 hours, inserting the morphological lower ends of the twigs into a matrix, laying a heating wire at the bottom of the matrix, and controlling the temperature difference between the bottom of the matrix and the outside temperature at 15 DEG C approximately, and the water content at 30% approximately. The rooting rate is counted after 60 days, and reaches above 81%. The rooting rates of a single phytohormone treatment method or a single temperature difference method are both 0%. The method effectively realizes the apocarya cutting seedling raising; seedling raising approaches of apocarya are widened; and powerful technical support is provided for the rapid propagation and industrialization of the apocarya seedlings.