311results 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.

A method of making paper and paperboard products comprising absorbent structures is disclosed. The method comprises mixing an ultra-high molecular weight ("UHMW") glyoxalated polyethylene amide ("GPVM") adduct and a high molecular weight ("HMW") anionic polyacrylamide ("APAM") with ingredients in the raw material preparation process of the wet laying papermaking method. High wet strength paper and paperboard products are also disclosed.

The present invention provides a water-closed cycle waste paper pulping system and a process thereof, which relates to the technical field of pulping devices, and includes: a base, which is a rectangular plate-shaped structure, and is placed on the ground, and a box body with a rectangular box-shaped structure is fixed on the base. The present application, through the arrangement of the second barrel body and the third barrel body, firstly, can precipitate the pulp, and through precipitation, the excess water can be extracted, thereby ensuring the water content of the pulp; secondly, after the excess water is extracted, the water can be decomposed by a decomposition agent, and after decomposition, it can be put into the box body again for continued use, thereby realizing the circulation of water and saving water; the present application, through the arrangement of auxiliary components, firstly, the array-shaped air holes on the annular seat can improve the mixing effect of the pulp in the first barrel body, thereby improving the bleaching effect; secondly, under the telescopic action of the electric cylinder, the height change of the annular seat can be realized, thereby further improving the bleaching effect.

The invention relates to the technical field of waste treatment, and provides environment-friendly waste treatment equipment which comprises an equipment box body and a crushing and stirring stick, a plurality of inclined partition plates are installed in the equipment box body and divide the interior of the equipment box body into a plurality of treatment cavities, and a telescopic gate and a filter screen plate are installed at the lower end of each inclined partition plate; when the telescopic gates are opened, every two adjacent layers of treatment cavities communicate with each other, a driven gear is installed below the high end of each inclined partition plate, the driven gears are used for driving the corresponding telescopic gates to be closed or opened, and a driving gear and a vertical rotation switching mechanism are installed in the equipment box body; and the vertical rotation switching mechanism is used for carrying out linear driving or rotary driving on the driving gear in the vertical direction, so that the driving gear is in engaged connection with different driven gears. Opening and closing work of different telescopic gates can be completed by rotating or linearly driving the driving gear, the overall efficiency is high, and the conveying cost is low.

Recycle fiber bleaching includes an oxygen pre-treatment to activate the fiber for further bleaching. A preferred method of making a high brightness papermaking pulp from recycled cellulose fiber includes: (a) pre-treating a first recycled cellulosic fiber mix with oxygen, said first recycled cellulosic fiber mix having a first high Kappa number prior to pre-treatment and a reduced Kappa number after pre-treatment that is lower than said first high Kappa number; and (b) blending the pre-treated first recycled cellulosic fiber mix with the reduced Kappa number with a second recycled cellulosic fiber mix having a second Kappa number lower than the first high Kappa number of the first recycled cellulosic fiber mix; and (c) oxidatively bleaching the blended recycled cellulosic fiber mix of step (b); and optionally (d) reductively bleaching the blended recycled cellulosic fiber mix of step (c).

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.

To provide a roughly crushed piece supply device capable of satisfactorily and quickly agitating, discharging and humidifying roughly crushed pieces, and also to provide a fiber structure manufacturing device.SOLUTION: A roughly crushed piece supply device comprises: a storage tank that stores roughly crushed pieces including fibers and has a first space and a second space positioned below the first space; an introduction port that communicates with the first space and introduces the roughly crushed pieces into the first space; a partition part that divides the storage tank into the first space and the second space and has a communication port to make the first space and the second space communicate with each other; an adjustment part to adjust amount of the roughly crushed pieces transferred from the first space to the second space through the communication port; an agitation part to agitate the roughly crushed pieces in the second space; and a discharge port to discharge the roughly crushed pieces agitated by the agitation part from the second space.SELECTED DRAWING: Figure 2

The invention provides a preparation method of a cellulose-based film with an ultraviolet shielding function. The method comprises the steps of preparation of cellulose, preparation of oxidized nanocellulose and preparation of the cellulose-based film with the ultraviolet shielding function. The invention also provides an application for preparing a material which has permeability to visible light and can shield total ultraviolet rays. The cellulose-based thin film can shield ultraviolet rays in a full wave band, meanwhile, the light transmittance of the cellulose-based thin film in a visible light region exceeds 90%, and high-transparency and strong ultraviolet ray shielding in the true sense is achieved.

A sheet manufacturing system includes a coarsely crushing apparatus that coarsely crushes a paper; a sheet manufacturing apparatus that generates a sheet-shaped recycled paper using coarsely crushed pieces of the paper as a raw material; and a server that is connected to the coarsely crushing apparatus and the sheet manufacturing apparatus via a network, in which the sheet manufacturing apparatus has a reserving section that reserves the coarsely crushed pieces, a remaining amount detector that detects a remaining amount of the coarsely crushed pieces in the reserving section, a calculation section that calculates an allowable filling amount of the coarsely crushed pieces in the reserving section based on a detection result of the remaining amount detector, and an output section that transmits information related to the calculated allowable filling amount to the server, and the coarsely crushing apparatus has an integration section that integrates the coarsely crushed pieces, an input section that acquires the information related to the allowable filling amount from the server, a display information generation section that generates display information related to the allowable filling amount based on the information acquired by the input section, and a display section that displays the display information.

A method for manufacturing packaging material (10) which includes collecting residual grain, in the form of BSG (brewers spent grain) (12), from a beer brewing process (14), breaking down fibres (16) contained in the grain, creating a pulp (18) from the broken-down fibres, preparing the pulp (20) for article formation, including adding biodegradable additives to the pulp (22), and forming an article from the pulp (24) suitable for use as packaging.

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.

An inorganic fiber mat is produced by a method of producing an inorganic fiber mat. The method includes 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 10 inorganic fibers, and a papermaking step of forming the inorganic fiber mat by papermaking using a slurry containing the defibrated inorganic fibers.

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 purpose of the present disclosure is to provide a method that can form recycled pulp fiber, wherein the method suppresses the residual presence of highly water absorbent polymer and residues thereof and suppresses changes in properties in comparison to bringing about oxidative degradation of highly water absorbent polymer using only an oxidant. This method produces recycled pulp fiber from a mixture obtained from hygiene products and comprising pulp fiber and highly water absorbent polymer, wherein the method characteristically comprises: a recycled pulp fiber formation step for forming recycled pulp fiber by supplying an oxidant and ultraviolet radiation to an aqueous solution comprising the aforesaid mixture in order to oxidatively degrade the highly water absorbent polymer and dissolve the oxidatively degraded highly water absorbent polymer in the aqueous solution; and a recycled pulp fiber recovery step for recovering the recycled pulp fiber.

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.

A method of treating cellulosic waste material, decolorized cellulosic pulp and uses thereof. The method includes providing a cellulosic waste material containing colouring substances such as color pigments, dyes, colorants, and combinations thereof, pulping the 5 waste material to produce a cellulosic pulp, and decolorizing the pulp with ozone under alkaline conditions. By subjecting recycled textile waste material to ozone treatment in the alkaline range after pulping, excellent whiteness of the pulp is achieved without significantly compromising the viscosity of the pulp.

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 present invention provides a composition and process for preparing a depolymered paper product from polymer-coated paper waste, comprising the steps of treating shredded polymer-coated paper waste with a polymer removing composition comprising a mixture of a solvent component, a surfactant component, and an acidic component.

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.

According to an example aspect of the present invention, there is provided a method for manufacturing cellulose films and / or coatings from alkaline cellulose solutions via citric acid regeneration coagulation.

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.

An integrated method and system for recycling waste materials, including waste paper, is provided, the method including shredding the waste materials, treating the shredded waste materials in a pressure vessel at an elevated processing temperature and pressure to form a treated waste material including substantially repulped waste paper, discharging the treated waste material from the pressure vessel, and then separating and diluting the treated waste material to dilute the portion including substantially repulped waste paper to about 1% to about 20% solids by weight. The recovered paper pulp portion and substantially fiber-free recoverable / recyclable plastics and metals may be further separated and used as feedstock in various downstream processes.