197results about "Waste paper working-up" patented technology

The invention discloses a production process of high-folding-resistance corrugated base paper, and particularly relates to the technical field of corrugated paper production. The process comprises the following steps: mixing and hydraulically pulping different types of waste paper raw materials to obtain original waste paper pulp with the concentration of 2.5-2.8%; original waste paper pulp enters a classifying screen after being subjected to high-concentration sand removal, coarse screening and low-concentration sand removal, and fibers in the waste paper pulp are screened into long fibers and short fibers; mixing the long fiber pulp and the short fiber pulp in proportion, and carrying out papermaking and surface sizing treatment; wherein the papermaking comprises the steps of forming a net part, squeezing and dehydrating, and drying in a pre-drying part to obtain initial corrugating base paper with the dryness of 90-92%, then carrying out surface sizing treatment on the initial corrugating base paper by using a boiled glue solution, drying at 60-100 DEG C until the dryness is 85-92%, and curling and slitting to obtain the high-folding-resistance corrugating base paper. Stable production of the high-folding-resistance corrugated base paper is achieved through raw material diversification, fiber refining treatment, papermaking process flexible regulation and control and glue solution accurate preparation.

Natural bamboo is chemically treated to remove at least some lignin therefrom. As a result, the bamboo becomes more porous and less rigid, while otherwise retaining the aligned microstructure of bamboo fibers and constituent cellulose nanofibers. In some embodiments, the treated bamboo can then be pressed such that the lumina therein at least partially collapse, thereby improving the strength and toughness of the bamboo among other properties. In some embodiments, the treated bamboo can be infiltrated with a polymer or polymer precursor, and / or have non-native particles added to surfaces thereof to tailor properties of the resulting bamboo structure. By further modifying, manipulating, or machining the treated bamboo, it can be adapted to various applications.

The present invention relates to a glass paper for stripping interleaving paper, wherein the majority of the fiber ingredients are non-regenerated bleached chemical pulp from hardwood such as birch or eucalyptus. A small amount of recycled pulp produced from release liner glass paper and / or pulp mill broke is used to adjust the characteristics of the fiber ingredients. The invention makes it possible to produce cellophane, wherein the fibrous ingredients do not contain non-recycled chemical pulp produced from cork.

The invention provides a system for purifying stickies in pulp of a deinking pulp line, which relates to the technical field of papermaking industry and comprises a repulping carrying cylinder and a cleaning assembly, a treatment cavity is formed in the repulping carrying cylinder, a cleaning assembly is arranged in the treatment cavity, and the repulping device is characterized in that the cleaning assembly comprises a rotating supporting cylinder, the rotating supporting cylinder is rotationally installed in the middle of the treatment cavity, the outer side of the rotating supporting cylinder is fixedly connected with a connecting belt shaft, and the outer side of the connecting belt shaft is fixedly connected with a repulping cutter; the two-way lead screw is rotationally installed in the rotating supporting cylinder, one end of the two-way lead screw is fixedly connected with a rotating handle, and the outer side of one end of the rotating supporting cylinder is fixedly connected with a limiting angle block; the cleaning assembly is arranged, the cleaning assembly and the slurry are mechanically linked through adjustment, attached sticky substances and residual slurry are efficiently scraped through mechanical scraping, the cleaning efficiency is greatly improved, bacterium breeding caused by slurry residues can be eradicated, and it is guaranteed that follow-up slurry quality is not polluted from the source; and dual optimization of production efficiency and cleaning maintenance is realized.

The present invention concerns a facility for cleaning cigarette butts, including a treatment tank configured to treat the cigarette butts in order to extract therefrom fibres to be depolluted, and depollution means configured to depollute the fibres by placing them in contact with a fluid in the supercritical state, referred to as supercritical fluid.

The present invention generally relates to methods and compositions for manufacture of tissue, paper, or board and for enhancing retention and drainage thereof. In particular, the disclosure provides methods for enhancing retention and drainage by addition of a retention and drainage aid comprising quick inversion cationic emulsion polyacrylamides (QIC-EPAMS) and polyvinylamine (PVAm) polymers Preparation of paper sheets under these conditions provides improved retention, gravimetric drainage rates, and DDA drainage time, without over-flocculation and allowed for significant decrease in PVAm dosage.

The invention relates to a process for producing non-woven fabric-like composite materials, novel non-woven fabric-like composite materials, articles made therefrom and their use. In particular the fabric-like composite materials are derived from shredded polymer-glued or polymer-coated paper products and coffee grounds as raw material.

The present invention generally relates to methods and compositions for making tissue, paper or paperboard and for enhancing their retention and drainage. In particular, the present disclosure provides a method for enhancing retention and draining by adding a retention and drainage aid comprising a fast reversed phase cationic emulsion polyacrylamide (QIC-EPAM) and a polyvinylamine (PVAm) polymer. Manufacture of paper under these conditions provides improved retention, gravity drain rate, and DDA drain time without excessive flocculation, and allows for a significant reduction in PVAm dosage.

The invention relates to a process for producing non-woven fabric-like composite materials, novel non-woven fabric-like composite materials, articles made therefrom and their use. In particular the fabric-like composite materials are derived from shredded polymer-glued or polymer-coated paper products and coffee grounds as raw material.

To provide a method capable of achieving both a processing speed and energy efficiency in ozone processing, in a method of manufacturing recycled fibers from a mixture of highly water-absorbing polymer and pulp fiber.SOLUTION: A method for manufacturing recycled fibers from a mixture of highly water-absorbing polymer and pulp fiber includes: a first processing step S6; and a second processing step S9. In the first processing step, the mixture of the highly water-absorbing polymer and the pulp fiber is processed with ozone in a first processing liquid 52-1 while ozone is supplied to the first processing liquid in a first processing tank 31-1, and at least a part of the highly water-absorbing polymer is removed. In the second processing step, the pulp fiber is processed with ozone in a second processing liquid 52-2 while ozone discharged from the first processing liquid in the first processing tank is supplied to the second processing liquid in a second processing tank 31-2.SELECTED DRAWING: Figure 1

Provided is a method for producing recycled fibers from a mixture of a superabsorbent polymer and pulp fibers, the method making it possible to achieve both treatment speed and energy efficiency in ozone treatment. This method for producing recycled fibers from a mixture of a superabsorbent polymer and pulp fibers comprises a first treatment step (S6) and a second treatment step (S9). The first treatment step includes removing at least part of the superabsorbent polymer by treating the mixture of the superabsorbent polymer and the pulp fibers with ozone in a first treatment liquid (52-1) within a first treatment tank (31-1) while supplying ozone to the first treatment liquid. The second treatment step includes treating the pulp fibers with ozone in a second treatment liquid (52-2) within a second treatment tank (31-2) while supplying ozone released from the first treatment liquid within the first treatment tank to the second treatment liquid.

The invention relates to the technical field of waste paper pulping, and discloses a water closed cycle waste paper pulping mechanism which comprises a support and further comprises an impurity removal box, a spraying box and a treatment box which are sequentially installed on the support from top to bottom. A mixing cylinder used for mixing repulping and a diluting component are installed in the treatment box, a spraying plate is arranged in the spraying box and used for spraying a solution into the treatment box, a conveying pipeline communicated with the treatment box is arranged on the outer side in the impurity removal box, the solution is conveyed into the impurity removal box through a water pump, and an air flotation component is arranged in the impurity removal box. Wastewater is reused, closed circulation of the wastewater is achieved, repulping is limited by the mixing cylinder, the wastewater in the circulation process does not need to be additionally filtered, in the wastewater reuse process, a large amount of repulping is diluted by a small amount of recycled wastewater, and the wastewater is recycled. Meanwhile, the solution can be circulated while being diluted, so that the discharge of wastewater is reduced.

The invention discloses a preservative paper preparation process constructed based on a plant bionic crosslinking strategy, which comprises the following steps: S1, dissolving polyvinyl alcohol in deionized water at 93-97 DEG C to form a homogeneous polyvinyl alcohol solution with the concentration of 1.5-3 wt%; s2, adding borax into the solution obtained in the step S1, and stirring at 88-92 DEG C at the stirring speed of 400-600r / min for 25-35 minutes to form a borax mediated pre-crosslinking system; s3, under the continuous alkaline condition, urea is added into the pre-crosslinking system obtained in the S2, stirring continues to be conducted for 25-35 min, and a PVA-urea hydrogen bond three-dimensional compact grid structure is constructed; and S4, sizing the composite coating obtained in the step S3 on the surface of quantitative 35-45 g / m < 2 > of base paper according to the coating weight of 2.5-3.0 g / m < 2 >, and drying at 60-105 DEG C for 8-12 minutes to form the preservative paper base material with the gradient cross-linked structure. By innovating a material modification and structure reconstruction process, the barrier property bottleneck of the paper-based material is broken through, and the barrier property, oil resistance and water resistance of the paper-based material are enhanced while the environment-friendly characteristic is maintained.

The invention related to an apparatus for recycling of lignocellulosic fibres from a fibreboard (10) comprising compressed lignocellulosic fibres bonded together by a binding agent. The apparatus (100) comprises a transport device (110) arranged within a closed housing (111), wherein the housing (111) is arranged for steaming pieces (11) of the fibreboard (10) at super-atmospheric pressure to decompress and release the lignocellulosic fibres by hydrating them, as well as hydrolysing the binding agent, and the transport device (110) is arranged for transporting the fibreboard pieces (11), upon being steamed, from an inlet (116) of the housing (111), at which the fibreboard pieces (11) are fed to the housing (111), to an outlet (118) of the housing (111), at which steamed portions (12) comprising released lignocellulosic fibres exit the housing (111). Further, the apparatus comprises a steam generator (160) in communication with the housing (111), whereby the fibreboard pieces (11) may be steamed at super-atmospheric pressure in the housing (111) to provide the steamed portions (12) comprising released lignocellulosic fibres, an inlet pressure lock (120) configured to receive the fibreboard pieces (11) at atmospheric pressure and to deliver them to the housing (111), via the inlet (116), at super-atmospheric pressure, and an outlet pressure lock (130) configured to receive steamed portions (12) comprising released lignocellulosic fibres via the outlet (118) and ejecting recycled lignocellulosic fibres (13) during a sudden expansion of super-atmospheric pressure.

A hybrid insulation product and related method for making the insulation product. The insulation product includes one or more feedstock components that may include one or more cellulosic feedstock components, wherein a first portion of the one or more feedstock components is treated with wet fire retardancy material, and a second portion of the one or more feedstock components is treated with dry fire retardancy material. The one or more feedstock components may include in addition to one or more cellulose feedstocks, one or more agricultural fiber sources.

Provided is a method of producing an inorganic fiber mat the method including: a preparing step of preparing a first inorganic fiber molding derived from a needle-punched mat and a second inorganic fiber molding derived from a papermaking mat; a defibrating step of defibrating the first inorganic fiber molding and the second inorganic fiber molding to obtain defibrated inorganic fibers; and a papermaking step of forming the inorganic fiber mat by papermaking using a slurry containing the defibrated inorganic fibers.

To provide an oil absorbent that can be manufactured in a short time and inexpensively, and a method for manufacturing an oil absorbent.SOLUTION: An oil absorbent includes at least pulverized defective corrugated cardboard, or used corrugated cardboard, or disposal corrugated cardboard, where the corrugated cardboard is one having inner and outer two liners impregnated with wax and a core impregnated with wax sandwiched between both liners, or one impregnated with wax over the approximately entire corrugated cardboard.SELECTED DRAWING: Figure 1

Natural bamboo is chemically treated to remove at least some lignin therefrom. As a result, the bamboo becomes more porous and less rigid, while otherwise retaining the aligned microstructure of bamboo fibers and constituent cellulose nanofibers. In some embodiments, the treated bamboo can then be pressed such that the lumina therein at least partially collapse, thereby improving the strength and toughness of the bamboo among other properties. In some embodiments, the treated bamboo can be infiltrated with a polymer or polymer precursor, and / or have non-native particles added to surfaces thereof to tailor properties of the resulting bamboo structure. By further modifying, manipulating, or machining the treated bamboo, it can be adapted to various applications.

The application relates to a plasma direct deinking method, belonging to the paper deinking technical field.The plasma direct deinking method is characterized in that: a plasma spray gun with a special electrode structure is designed and manufactured, ionized working gas is used as a working medium, a plasma jet is generated to directly process the surface of paper materials, and different carrier gases are used according to different inks.The application uses ionized gas instead of chemical deinking agents, adopts a direct surface processing method, and under the bombardment of plasma particles, the combination of ink components with paper fibers is lost, and the pigments and other particles in the components are stripped from the surface of the paper, so that the ink on the surface of the paper is directly removed.The application can obtain a plasma direct deinking method.

The present disclosure is directed to a method for repulping lignocellulosic fibers having at least one wet strength resin disposed thereon, the method comprising: b) preparing an aqueous slurry comprising (1) the lignocellulosic fiber, (2) the resin, and (3) an enzymatic agent present in an amount of from about 0.01 to about 1 wt.%, based on the dry weight of the lignocellulosic fiber, wherein the enzymatic agent comprises: i) at least one hemicellulase; and, ii) at least one cellulase; and, c) agitating the slurry.

The present invention provides a method for producing recycled pulp fibers derived from used absorbent articles that is highly safe and has a high cleaning effect. [Solution] A method for producing recycled pulp fibers from used absorbent articles comprises a dewatering and washing step and a separation step. In the dewatering and washing step S3, a mixture containing pulp fibers from used absorbent articles and a treatment liquid containing at least one of a non-flammable hydrophobic organic solvent, a hydrophilic organic solvent, and water is stirred to dewater the pulp fibers. In the separation step, the pulp fibers are separated from the mixture.

This application relates to a continuous pulping method for high wet strength waste paper and a horizontal tube continuous digester. The method involves continuously feeding shredded high wet strength waste paper into a horizontal tube continuous digester with an aspect ratio of 8:1, where it is mixed with water and PAE crosslinking breaking agent to form pulp. Steam is directly introduced into the reactor for heating, and a central rotating shaft with a shearing plate is driven to rotate at a low speed of 5-15 r / min, applying continuous and gentle mechanical agitation and shearing to the pulp. The pulp is then continuously processed and discharged. This application achieves an effective synergy between high temperature, chemical degradation, and mechanical shearing, breaking through the inefficiency bottleneck of traditional intermittent hydraulic pulping. It not only achieves continuous and efficient production but also effectively improves fiber dissociation rate and significantly reduces unit energy consumption and loss of pulp physical strength.

To detect existence of contaminated foreign matters and kinds and sizes thereof with high probability in a paper making step using a waste paper raw material contaminated with foreign matters including taboo articles.SOLUTION: A near-infrared spectrum of a waste paper pulp slurry obtained by using a waste paper raw material or a pulp mat obtained from a waste paper pulp slurry is acquired by using a hyper-spectral camera, and this spectrum is analyzed to detect foreign matters in the waste paper pulp slurry.SELECTED DRAWING: Figure 1

A recycled sheet generation system includes a detection section that detects a type of material included in a raw material, a fiber separation section that generates fibers by separating the raw material, a sheet production section that produces a sheet by depositing a mixture in which a treatment agent is mixed with the fibers generated by the fiber separation section, a printing section that prints on the sheet, a history acquisition section configured to acquire, as history, a sheet configuration component based on the type of material that is included in the raw material and that was detected by the detection section and a sheet production condition, and a registration section that registers the sheet configuration component and the sheet production condition in association with each other. The printing section prints an access destination for accessing the registered sheet configuration component and the sheet production condition in a predetermined region of the sheet.

The application discloses a production process of secondary fiber high-performance low-basis weight wet-strength recycled kraft paper, and aims at solving the technical problem of high material cost and high production energy consumption caused by the fact that the existing high-strength wet-strength paper is generally produced by using 100% virgin wood pulp as raw material. The application comprises the following steps: preparing raw materials, wherein the raw materials comprise American waste recycled pulp board or American waste 12 / 13# and virgin coniferous wood pulp; preparing the American waste recycled pulp board or American waste 12 / 13# into first pulp by a preset first pulping process, preparing the virgin coniferous wood pulp into second pulp by a preset second pulping process, and mixing the first pulp and the second pulp at a paper machine feeding system to become papermaking pulp; adding retention and drainage aids, in-pulp sizing agent and wet-strength agent into the papermaking pulp; conveying the papermaking pulp to a paper machine through the paper machine feeding system, and performing papermaking, squeezing dewatering, drying, sizing and calendering processes on the papermaking pulp by the paper machine, so that the kraft paper product is obtained.

A system for decolorization of material comprising cellulose including: a purification stage for removing non-cellulosic components from cellulose in alkaline process conditions; a first decolorization stage for decolorizing the material comprising cellulose in alkaline process conditions; and a second decolorization stage for decolorizing the cellulose in alkaline process conditions; wherein the first and second decolorization stages use ozone and hydrogen peroxide; wherein the purification stage and the second decolorization stage include washing the cellulose, wherein the purification stage, the first decolorization stage and the second decolorization stage are connected to the subsequent stage by a process line for feeding the cellulose; and wherein each washing arrangement is connected to the washing arrangement of a preceding stage by a filtrate line for feeding wash filtrate of the washer of a preceding stage.

A method for controlling papermaking, comprising: monitoring the liquid level of a fibrous suspension in a reservoir (302); identifying that the liquid level has dropped so as to meet at least one empty criterion (303), and then identifying that the liquid level has risen so as to meet at least one replenishment criterion; and starting to administer a biocide to the fibrous suspension flowing into the reservoir in response to identifying that the liquid level has risen so as to meet at least one replenishment criterion. A corresponding device and computer program are also disclosed.

To provide a bale which is excellent in putrefaction resistance and is also excellent in disintegration properties of waste paper; and to provide a method for manufacturing the bale.SOLUTION: There is provided a bale comprising waste paper having at least a resin layer and a paper base material layer. In the bale, a basis weight of the waste paper is 100 g / m2 or more, and a median value of an area of the waste paper is 20 cm2 or more and 150 cm2 or less. There is also provided a method for manufacturing a bale, comprising a molding step of subjecting waste paper having at least a resin layer and a paper base material layer to compression molding to obtain the bale. In the method, a basis weight of the waste paper is 100 g / m2 or more, and a median value of an area of the waste paper is 20 cm2 or more and 150 cm2 or less.SELECTED DRAWING: None

The invention discloses regenerated high-strength corrugating base paper, a preparation method thereof and a corrugated board for shoe boxes. The preparation method of the corrugating base paper comprises the steps that waste paper pulp is subjected to enzyme modification treatment and pulped, and then cationic starch, a polyamide epichlorohydrin wet strength agent, carboxylated cellulose nanocrystals and alkyl ketene dimer are added and mixed to obtain corrugated paper primary pulp; carrying out papermaking forming on the corrugated paper primary pulp, and carrying out squeezing dehydration and drying to obtain shaped paper; a reinforcing sizing material is applied to the surface of the sizing paper, and the sizing paper is dried and calendered to obtain corrugated base paper; the reinforced sizing material is prepared from 80 to 90 parts of a film-forming reinforcing agent, 3 to 5 parts of carboxylated reduced graphene oxide dispersion liquid, 1 to 2 parts of a carbodiimide cross-linking agent, 1 to 5 parts of a borate coupling agent and 5 to 8 parts of polydimethylsiloxane; the film-forming enhancer comprises a styrene-acrylic emulsion and a carboxylated styrene-butadiene emulsion, so that the obtained corrugating base paper has high strength and excellent moisture resistance, and is suitable for being made into a corrugated board for a shoebox.

The invention relates to a waste paper recycling method and application thereof, and belongs to the technical field of waste paper recycling. The invention provides a waste paper recycling method which comprises the following steps: S1, adding a compound enzyme into a reaction kettle, heating to 40-50 DEG C, adding waste paper, pulping, performing ultrasonic treatment, performing enzymolysis, and filtering to obtain pretreated fiber pulp; s2, transferring the pretreated fiber pulp into a photocatalytic reaction tank for reaction; s3, spraying a nano material to form a Zeta potential gradient, transferring into an electromagnetic field treatment device, carrying out directional arrangement, dehydrating, and drying to obtain paper; wherein the compound enzyme is prepared from cellulase, xylanase, laccase and pullulanase. According to the method, key indexes such as deinking efficiency, fiber protection, bleaching performance and mechanical strength are remarkably improved, the technical bottleneck in recycling of the oil-containing waste packing paper is successfully solved, and a breakthrough scheme is provided for production of high-added-value regenerated paper pulp.