1525 results about "Kraft paper" patented technology

A composite structural material suitable, for example, as a replacement for wooden boards, is disclosed. It comprises a dimensionally stable core material ensheathed in a dimensionally stable, laminar covering that is adherent to the core material. The laminar covering is comprised of at least one layer of parallel cords bonded to at least one layer of a rigidified web material selected from the group consisting of paper and cloth. Suitable core materials include polyurethane foam, optionally filled with granulated rubber and/or expandable polymer beads. The parallel cords preferably are supplied in the form of a strip of polyester cloth, as the warp cords thereof. The web material preferably is kraft paper that is rigidified with an epoxy resin.

The environmental protection shelving combination of the present invention includes sleeves and panels made of corner protection paper for support and plastic connector sets used for coupling the sleeves. Therefore, in accordance with different requirements, the assembly thereof can be altered as desired. Furthermore, since the corner protection paper is formed by pressing Kraft paper and the sand tube paper into a supporting structure, it can provide bearing and pressure capability, so that can replace the conventional wood, plastic or metal framework. Accordingly, not only the costs of material, conveying and assembly can be reduced, the pollution to the environment also can be minimized.

A system and/or method for cutting designs of text and/or shapes out of sheet material, such as paper, vellum, and other materials used in, for example, the scrapbooking and card making industries.

Materials and a method are provided whereby polymers with least 0.5 mole % of the pendant group or end group containing —Si(OR″)₃ (where R″ is H, an alkyl group, Na, K, or NH₄) are used to control aluminosilicate scaling in an industrial process having an alkaline process stream such as a pulping mill process stream. When materials of the present invention are added to the alkaline process stream, they reduce and even completely prevent formation of aluminosilicate scale on equipment surfaces such as evaporator walls and heating surfaces. The present materials are effective at treatment concentrations that make them economically practical.

A composition and process suitable for making acoustic tiles are disclosed. Certain embodiments of the composition comprise: perlite; inorganic material selected from the group consisting of calcium sulfate, calcium carbonate, clay and mixtures thereof; a binder selected from the group consisting of starch, a combination of starch and cellulosic fibers, latex, kraft paper gel and mixtures thereof; optionally mineral wool; optionally gypsum; and cellulosic fiber, wherein at least a portion of the cellulosic fiber and at least a portion of the inorganic material are pulp and paper processing waste comprising cellulosic fiber, clay and calcium carbonate. Certain embodiments of the process comprise: forming an aqueous slurry; continuously flowing slurry onto a moving foraminous wire to form a cake; dewatering the cake to form a base mat; and drying the base mat.

A method and apparatus for reducing mercury in industrial gases such as the flue gas produced by the combustion of fossil fuels such as coal adds hydrogen sulfide to the flue gas in or just before a scrubber of the industrial process which contains the wet scrubber. The method and apparatus of the present invention is applicable to installations employing either wet or dry scrubber flue gas desulfurization systems. The present invention uses kraft green liquor as a source for hydrogen sulfide and/or the injection of mineral acids into the green liquor to release vaporous hydrogen sulfide in order to form mercury sulfide solids.

A process for separating organic components from a pulp mill waste stream comprising the steps of washing a cellulose pulp to obtain an aqueous extraction liquor containing organic components, and separating at least a portion of said organic components from the extraction liquor by passing the extraction liquor through at least one nanofiltration membrane. The process may be used in conjunction with a variety of pulp mill processes, including kraft cooking processes, hot caustic extraction processes, sulfite cooking processes, and bleaching processes.

A method for the determination of cellulosic-fibre properties, such as, but not limited to, residual lignin content of chemical pulp, with the aid of a spectroscopic technique obtained over a range covering the visible and the near-infrared regions of the electromagnetic spectrum, comprising the steps of obtaining a sample from the process line, minimally removing some excess water, exposing the fibres in the sample to a large beam light source, optionally moving the sample at a constant speed, and acquiring the spectral data over a pre-determined length of time, and correlating the spectrum to a previously determined calibration so as to determine the Kappa number. Alternatively, as an arrangement for process control, along with other varying configurations, the instant invention includes the mounting of the excitation light source and fibre-optic probe along the various locations of the kraft cooking and bleaching process, such as 1) at the drum brownstock washers and 2) throughout the bleach plant deckers, located just before the doctored blade, the probe being connected to a fast scanning spectrometer, via fibre optic cables, with a computer sequencing spectral acquisition and correlating the spectrum against a predetermined calibration, and logging the results. The process configuration, with the use of the instant invention, overcomes all limitations of prior art, including sampling hardware and sample preparation, and provides true online Kappa number determinations of the order of seconds, as compared to current state of the art Kappa analyzers which require 10 to 15 minutes per analysis. The present method is capable of measuring residual lignin content of chemical pulps with varying consistency, accounts for species effects to provide species insensitivity and can provide analysis in less than 10 seconds. The method can provide true online continuous measurement of Kappa number for feedforward and feedback control of the bleaching, paper machine and kraft cooking processes.

The dispersant of the present invention comprises at least one component unit derived from kraft lignin and/or its salt and at least one component unit derived from at least one water-soluble monomer. The novel lignin derivative of the present invention comprises at least one component unit derived from kraft lignin and/or its salt, at least one polyoxyalkylene chain, and at least one anionic functional group.

A low density polyethylene film layer is extrusion coated on densified bleached kraft paper liner to form a film-coated liner sheet. A facestock sheet is adhered with a layer of hot melt adhesive to the film layer to form a laminate sheet web, which is rolled on a roll. The facestock sheet, the film layer and the adhesive layer together define a laminate feedstock. The roll is transported to and loaded on a press with the liner side up. One (or both) edge(s) of the web is (are) crushed with a calendering die to form thin lead-in edge(s). The web is die cut on the bottom face, up through the laminate facestock, but not through the paper liner, to form the perimeters of a grid of blank business cards or other printable media, with a waste paper frame of the laminate facestock encircling the grid. The web is then die cut from the top through the paper liner and to but not through the laminate facestock, to form liner strips covering the back face of the laminate facestock. According to one preferred embodiment of the invention, alternate ones of the strips are then pulled off of the laminate facestock web. A final production step is to sheet the web to form the desired sheet width (or length) of the laminated sheet construction. The individual laminated business card sheets can be stacked into the infeed tray of an ink jet printer for example, and the sheets individually and automatically fed lead-in edge first into the printer and a printing operation performed on each of the printable media, to form a sheet of printed media. The remaining strips on the back of the laminate facestock cover the lateral cut lines in the laminate facestock and thereby hold the facestock together as it is fed into and passed through the printer. The user then individually peels the printed media off of the strips and out from the waste paper frame. Thereby printed business cards (or other printed media), each with its entire perimeter defined by clean die cuts, are formed. Instead of calendering both edges of the web and thus the sheet, one end can be calendered and a strip of the laminate facestock can be stripped off of the liner sheet from the other end. The remaining thin liner sheet strip at the other end forms a thin infeed edge for feeding into a horizontal feed, ink jet printer.

The envelope comprises layers of plain un-coated kraft paper and of bubble-wrap polyethylene. A stack of the layers is joined at the marginal edges of the envelope by squeezing the stack between a pair of points-dies, which are formed with points that puncture the kraft paper but do not puncture the polyethylene. The points push crowns of un-punctured polyethylene through the punctured boles in the paper. Then, the marginal edges are squeezed flat between flat-dies, the flat-dies being heated enough to cause fuse-bonding. The margins of the finished envelope are held together not only by fuse-bonding, but by the presence of the crowns, which, penetrating right through the holes in the paper, serve as mechanical rivets.

The invention discloses a carbon crystal calorific plate and the preparation method thereof, especially a carbon crystal calorific plate used for floor heating and preparation thereof. The calorific plate consists of a reflective metal coating, an epoxy resin proof fabric bottom, a kraft paper layer, a carbon crystal powder layer, a copper sheet electrode, an epoxy resin proof fabric layer, a decorative paper layer and a polyester film. The preparation method of the calorific plate comprises the preparation methods of the carbon crystal powder, the epoxy resin proof fabric and the carbon crystal calorific plate. The calorific plate in the invention has the advantages of strong far-infrared radiation, high electricity-heat radiation conversion efficiency, small surface temperature difference and strong acid/alkali/corrosion proof ability, and can be applied in the hidden project like floor heating safely.

Disclosed is a making method of truewood hot setting resin soaked high-pressure laminated decorative fireproof board, comprising the following steps: immerses a plurality of kraft paper pieces in resin and then dry the kraft paper pieces so as to obtain soaked kraft paper pieces whose resin percentage in weight is more than or equal to 25 percent and less than or equal to 80 percent and whose fugitive constituent percentage in weight is more than or equal to 0.05 percent and less than or equal to 25 percent; pile up the dried kraft paper pieces and cover a truewood skin on the kraft paper pieces to form an initial blank; press the initial blank. In this way, a native truewood decorative fireproof board can be made. The invention is made with natural truewood skin and a plurality of kraft paper pieces immersed in resin under hot press treatment and is pressed into fireproof, heat-resistant, wear-resistant and scrape-resistant decorative materials with both the function of a wooden decorative board and the function of fire resistance of a fireproof board; with the advantages that the invention is of no need to paint, easy to maintain and is environment-friendly, the invention is suitable to be used in the fitment of an office, furniture and cooker.

Provided is a method which is capable of producing a cellulose nanofiber dispersion liquid that has a low viscosity and excellent fluidity even at a high concentration, while exhibiting excellent transparency. In a method for producing cellulose nanofibers, wherein a cellulosic starting material is oxidized in water using an oxidant in the presence of an N-oxyl compound and a compound that is selected from the group consisting of a bromide, an iodide and a mixture thereof and the thus obtained oxidized cellulose is defibrated and dispersed, pulp which is obtained by carrying out kraft cooking after a hydrolysis process is used as the cellulosic starting material.

A method for removing metal contaminants from acidic mine wastewater using lignin derivatives, such as lignosulfonates and kraft lignin, an alkali coagulant, such as a lime compound, and an alkaline composition for increasing the pH. The lignin derivatives are dispersed in the wastewater and the coagulant is added, increasing the pH to about 4.5-8.5 and causing the formation of a floc. The alkaline composition is then added to bring the pH to about 9 to 10, causing the further formation of a floc. Optionally, air oxidation is carried out, reducing the pH to about 8.1-8.6. Optionally, a ferric or ferrous salt may also be added. The flocs comprise metal-lignin colloids, metal hydroxides and metal salts. The flocs coagulate to form a sludge. Optionally, fly ash or diatomaceous earth may be added to increase the density and stability of the sludge. The sludge that is formed contains the metals and is separated from the treated water by filtration.

The invention discloses a paper-plastic composite film, which consists of kraft paper, a resin bonding layer, a vacuum aluminizing polyethylene glycol terephthalate film, an adhesive layer and a heat sealing layer which are connected in sequence from the top to the bottom. The invention also provides a production process of the paper-plastic composite film, which comprises the following steps of: 1) compounding films by extruding; 2) compounding films in a dry method; and 3) curing and slitting the composite film in a curing chamber. The production process of the paper-plastic composite film combines extrusion compounding with dry compounding, wherein the kraft paper and an aluminum coated layer of VMPET are subjected extrusion compounding to avoid the phenomenon of the transfer of the aluminum coated layer occurring in the conventional dry compounding and ensure the separating performance of the paper-plastic composite film; and higher compounding strength is provided by the dry compounding, so that the paper-plastic composite film has short production period, high compounding firmness and low solvent residue.

The present invention relates to a pallet including a base, a paper cellular structure, and a lid, wherein the base, being made of plastic, wood, plastic-wood, or plastic-stone, including a tray-like structure with paper-cylinder-inserted feet formed underneath, the paper cellular structure, having krafts adhere to the top and the bottom thereon to fix its shape and being fastened in the tray-like structure, and the lid being made of the same material as that in the base and being fixed on the base, thereby forming a light-weight, heavy-duty, and also environmental friendly pallet.

The present invention provides a paste or solid cleaning agent composition for cleaning human skin, hair and such that gives a mild and refreshing tactile sensation, and exhibits superior stability and a sufficient foaming performance. The first portion of the present invention characteristically comprises (a) 5-50 mass % of a specific acyl salt anionic surfactant, (b) one, two or more chosen from inorganic salts, organic acids, and organic salts, (c) polyethylene glycol, and (d) water wherein the total electrolyte molar concentration is 1.8 mol/kg or more. The second portion of the present invention characteristically is in a paste or solid form and has a system melting point of 40° C. or higher, comprising (a) an anionic surfactant having a Kraft point of 40° C. or lower, (b) one, two, or more chosen from inorganic salts and organic salts, (c) trihydric or higher polyol, and (d) water.

The invention discloses a method for propagating apocarya seedlings. The method comprises the steps of selecting an annual apocarya seedling branch, shearing the branch to be the length being 10 cm, and soaking the lower end of the sheared branch into an 800 mg/L NAA solution for 4 h; placing a matrix into a paper bag, inserting a cutting into the matrix, enabling the paper bag obtained by cuttage to tightly abut against a mesh disc with a hole, and placing the paper bag on a seedbed; in the cutting rooting process, keeping the soil humidity to be about 70%, and keeping the temperature of the lower end of the cutting to range from 25 DEG C to 30 DEG C; conducting grafting 40 days after cuttage, adopting the bark peg grafting method, transferring the kraft paper bag, obtained after grafting, with the cutting into a large pot, filling the periphery of the pot with the matrix, pulling out 4/5 of the kraft paper bag, observing the grafting survival rate 15 days after grafting, completely removing the paper bag, and then conducting high-density nutrient and water management. According to the method, the apocarya nursery stock can grow more than 80 cm in the current year, and the survival rate is more than 90%.

The invention relates to the technical field of a stone decoration material, and particularly relates to a composite quartz board and a manufacturing process thereof. The manufacturing process comprises the following steps: weighing a mortar raw material for molding a quartz layer, and stirring for standby application; laying a layer of kraft paper or PVC film on the bottom surface of a mold, uniformly pouring the stirred mortar raw material into the mold, laying a piece of fibrous web on the surface of the flattened mortar raw material, then laying a layer of kraft paper or PVC film on the fibrous web, and vacuumizing, vibrating and compacting to obtain an uncured quartz mortar layer; and removing the kraft paper or PVC film on the fibrous web, attaching a ceramic tile coated with modified glue onto the surface of the fibrous web, then compacting, curing at a high temperature, cooling, molding, and grinding for determining the size to obtain the composite quartz board. The quartz layer is unlikely to separate from the ceramic tile, the adhesive strength is high, the production process is simple, no air bubble is produced during the compositing process, and the prepared composite quartz board is high in strength and long in service life.

A multiwall paper bag for bulk material, especially particulate or powdered material, has an inner ply of a high performance kraft paper, an intermediate layer or ply of a thin polyethylene secured to the outer surface of the inner ply, and an outer ply of high performance kraft paper that is secured to the intermediate ply. At least one end of the bag is closed during initial formation of the bag. The other end can be left open for filling and subsequent closing, or it can be initially closed and provided with a filling valve. At least the intermediate ply, and preferably the inner ply as well, is microperforated for venting of air during filling. The intermediate ply is secured to the inner ply either by a plurality of longitudinally extending transversely space apart lines of adhesive or the securing adhesive is spread completely over the mating surfaces of the two plies.