957results about "Cellulose pulp after-treatment modification" patented technology

To provide a material for thermoforming that contains microfibrous cellulose exhibiting thermoformability.SOLUTION: A material for thermoforming according to an embodiment contains 50 mass% or more of an onium salt-type anion-modified microfibrous cellulose having a number average fiber width of 2-1000 nm.SELECTED DRAWING: None

The invention belongs to the technical field of packaging carton production, and discloses a folding-resistant damp-proof packaging carton and a preparation method thereof. The folding-resistant moisture-proof packaging carton is prepared from the following raw materials in parts by weight: 70 to 80 parts of papermaking wood flour, 8 to 10 parts of filler, 30 to 40 parts of modified plant fiber, 20 to 30 parts of high-toughness plant fiber-based composite material, 8 to 10 parts of carboxymethyl cellulose and 1 to 2 parts of additive. According to the folding-resistant damp-proof packaging carton and the preparation method thereof, the defects that a packaging carton is prone to being affected with damp, cracks exist after being folded for multiple times, and the packaging carton is difficult to reuse are overcome. Through the modified plant fibers and the high-toughness plant fiber-based composite material, the folding resistance of the packaging carton is effectively improved, and meanwhile, the moisture resistance of the carton is also improved.

The present invention relates to a method for manufacturing a barrier layer for a paper or paperboard based packaging laminate. said method comprising: a) providing a barrier substrate comprising at least 50 wt % highly refined cellulose pulp (HRC) based on dry weight of the barrier substrate. said HRC having a Schopper-Riegler (SR) number above 80 as determined by standard ISO 5267-1, b) providing a transfer coating substrate comprising a vacuum coating layer and a backing layer separated by a release layer, and c) transferring the vacuum coating layer from the backing layer to the barrier substrate by a transfer coating process using an adhesive layer applied on the barrier substrate and / or the vacuum coating layer to obtain a barrier layer for a paper or paperboard based packaging laminate.

The invention discloses paper pulp, a paper pulp board, a preparation method and application. The paper pulp provided by the invention comprises the following components in parts by weight: 15-50 parts of wood pulp, 10-30 parts of recycled paper pulp, 10-40 parts of barley straw fibers, 2.5-40 parts of vinasse fibers, 3-8 parts of a negative oxygen ion exciting agent, 0.5-8 parts of an adhesive, 0.5-4 parts of a sizing agent and 0-1 part of an additive. According to the provided paper pulp, waste of the wine making industry chain is fully utilized, barley straw fibers, vinasse fibers, wood pulp, recycled paper pulp, the negative oxygen ion exciting agent and the like are combined, the obtained paper pulp fiber is high in strength, and a carton finished product is high in compressive strength and free of peculiar smell. The paper pulp for preparing cartons with excellent performance is provided while the recycling of wastes of a wine brewing industry chain is realized.

The invention belongs to the technical field of corrugated paperboards, and is characterized in that wood fibers and modified bamboo fibers prepared by reaction of allyl bamboo fibers, 1, 4-butanediol di (mercaptoacetate) and magnolol are pulped, a biodegradable water-resistant auxiliary agent is added for hydrophobic modification, papermaking and shaping are carried out to prepare water-resistant base paper, and the water-resistant base paper is prepared by the following steps: pulping the modified bamboo fibers and the biodegradable water-resistant auxiliary agent. And finally, preparing a surface paper layer, a corrugated medium paper layer and an inner paper layer from the water-resistant raw paper, and bonding and pressing to obtain the corrugated board. Magnolol groups grafted on the surfaces of the modified bamboo fibers can improve the water absorption performance of the fibers, and the hydrophobicity of the corrugated board is improved through the synergistic effect of the magnolol groups and the biodegradable water-resistant auxiliaries; the surface of the biodegradable water-resistant auxiliary agent is embedded with a carboxylated nano-cellulose structure, so that the biodegradable water-resistant auxiliary agent has deformation resistance; the epoxidized soybean oil is used as a core part and has excellent hydrophobicity; through combination of a polyphenol structure of tannic acid and hydrogen bonds of water-resistant base paper fibers, the mechanical properties of the corrugated board are improved, and the corrugated board has excellent biodegradability, hydrophobicity and mechanical strength.

The invention relates to a dry strength composition for manufacture of paper, board or the like. The dry strength composition comprises, as a mixture, at least one anionically derivatized polysaccharide, and cationic starch having an amylopectin content > 80 weight-%. The anionically derivatized polysaccharide and the cationic starch provide the composition with a charge density in the range of 0.1 — 1.5 meq / g, when measured at pH 2.8, and -0.1 — -3 meq / g, preferably -0.3 — -2.5 meq / g, more preferably -0.5 — -2.0 meq / g, when measured as an aqueous solution, at pH 7.0. The invention relates also to a use of the said composition and to a method for manufacturing paper, board or the like.

The invention relates to a method for manufacturing SCK paper having a basis weight in the range of 50 to 100 g / m2, wherein an optimal combination of nonrecycled BCP, BCTMP and recycled pulp obtained from release liner supercalendered Kraft paper is used to adjust the properties of the fiber furnish. While the use of BCTMP enables a product having a higher bulk, the recycled pulp component, which has high compatibility with the paper manufacturing process, enables to balance the manufacturing process and reduce the dimensional changes and shrinkage of the formed SCK paper. The combined presence of the BCTMP and the recycled pulp component in the fiber furnish improves the water removal from the fibers during the SCK paper manufacturing, while the presence of non-recycled BCP produced from softwood improves the formation and runnability of the paper web on the paper machine. This enables to produce SCK paper with improved sustainability, wherein the density may be controlled by means of the fiber furnish, without downgauging and without adverse effects to other paper properties, which would prevent the use of the SCK paper as substrate layer in a release liner.

The application relates to a method for producing a cellulose-based porous aerogel product, in which cellulose nanofibrils and a phase change material are mixed to form a homogenous suspension mixture, a carbon-based and / or mineral agent is added to the suspension mixture, and the suspension mixture is treated to form the porous aerogel product comprising a three-dimensional shape. Further, the application relates to a method for producing a cellulose-based porous aerogel composition. Further, the application relates to a use of the method.

Described herein is a composite structure that includes microfibrillated cellulose (MFC) monofilament permeated by a hydrophobic resin. Also described herein are a structure and methods of manufacturing the composite material and structure and the uses thereof.

A barrier film (1) for a paper or paperboard-based packaging material, said barrier film comprising a, MFC layer, (2) with a grammage in the range 20-100 g / m2, and a density higher than 650 kg / m3. The barrier film further comprises a PHA, dispersion coated, primer layer (3, 9) coated on at least one side of the MFC layer, wherein the primer layer has a coating weight 0.5-12 g / m2; the primer layer (3, 9) comprises a PHA type selected from the group consisting of PHB, PHBV, PHBH, P(3HB4HB), other co-polymers of PHB, other homopolymers such as PHO, PHH, P3HP, and combinations thereof; and a thin vacuum deposited layer (4) coated on a first primer layer (3) which vacuum deposited layer has a thickness of 20-500 nm, the vacuum deposited layer comprises material selected from the group consisting of aluminum, magnesium, silicon, copper, aluminum oxides, magnesium oxides, silicon oxides and combinations thereof, preferably aluminum oxides.

The invention relates to a preparation method of high-substitution-degree cationic micro-nano cellulose and application of the high-substitution-degree cationic micro-nano cellulose to improvement of water filtering performance of paper. In the enzymolysis pretreatment process, beta-1, 4 glucosidic bonds among glucose molecules are cut off, and more reaction binding sites are created for cationization after cellulose in an amorphous region and a part of crystalline region is hydrolyzed, so that the use amount of chemical reagents can be effectively reduced, and the environmental pollution is reduced. The prepared high-substitution-degree cationic micro-nano cellulose (CMFC) has abundant positive charges, weakens the hydrogen-bond interaction of cellulose molecules, improves the content of nano-fibrillation, and effectively reduces the mechanical preparation energy consumption of the CMFC. CMFC pulp is added into paper pulp fibers, so that pores of the paper fibers are blocked, more filler is intercepted, and the filler is difficult to be completely brought into white water by water flow in the water filtering process, so that the retention rate is increased, and the water filtering performance is effectively improved.

The invention relates to a method for manufacturing SCK paper having a basis weight in the range of 50 to 70 g / m2, wherein an optimal combination of BSKP and BCTMP is used to adjust the properties of the fiber furnish. In SCK papers with low basis weight the bulk of the formed paper web upon paper manufacturing may be controlled by means of the fiber furnish, without downgauging and without adverse effects to other paper properties, which would prevent the use of the SCK paper as substrate layer in a release liner. Thus SCK paper with exceptionally high share of BCTMP in the fiber furnish may be produced into the same thickness as was possible before for a conventional supercalendered kraft paper having a higher basis weight, while maintaining other quality characteristics of the paper sufficient for use as a substrate layer of an industrial release liner.

The invention provides lightweight sound-absorbing mute cotton and a preparation method thereof, the lightweight sound-absorbing mute cotton is of a bionic gradient structure and is divided into three layers, the bottom layer dissipates high-frequency sound waves, the middle layer optimizes intermediate-frequency resonance, and the upper layer enhances low-frequency sound wave scattering. The preparation method comprises the following steps: respectively preparing bottom-layer slurry, middle-layer slurry and upper-layer slurry; pre-cooling the bottom of a mold, and carrying out synchronous three-layer co-injection molding on the three kinds of slurry: carrying out one-way freezing to form a longitudinal gradient aperture; freezing and drying to obtain a three-layer gradient structure material; immersing in a graphene oxide quantum dot ethanol solution for vacuum treatment; heating, adding ascorbic acid, keeping for 2 hours, and applying 0.5% pre-strain to the material; photo-thermal curing is performed; and performing hot-pressing shaping to obtain the product. The gradient structure design is adopted, and the aperture, the fiber distribution and the filler type are regulated and controlled, so that acoustic impedance gradient change is realized, sound wave reflection is reduced, and the sound absorption efficiency is improved.

The invention discloses a preparation method and application of a cationized composite paper-based material for filtering nano plastic, and belongs to the technical field of nano cellulose. The preparation method comprises the following steps: preparing cationized lignocellulose nanofibers through DES treatment, dissolving out lignin through DES treatment, fully mixing the lignin with a silane coupling agent KH-560 to obtain silanized lignocellulose nanofibers, and then loading a layer of nano lignocellulose material on the surface of a polyvinylidene fluoride filter membrane by adopting a vacuum suction filtration method, and finally, cross-linking polyethyleneimine to obtain the cationized composite paper-based material. The cationized composite paper-based material prepared by the invention is green and environment-friendly, has excellent hydrophilic, antibacterial and recycling performances, and has broad-spectrum effects on the size, concentration and type of carboxylated nano-plastics in efficient capture. The cationized composite paper-based material has the advantages that the carboxylated polystyrene nano-plastic filtering efficiency reaches 97.56%, the filtering flux reaches 1889.99 L.m <-2 >. H <-1 >. Bar <-1 >, the practical application performance of lignocellulose is further widened, and the cationized composite paper-based material has a good application prospect.

The present invention relates to a method for preparing lignocellulose nanofibril and a lignocellulose nanofibril prepared by the method. The present invention also relates to a method for preparing a lignocellulose nanofibri reinforced composite material, and a lignocellulose nanofibri reinforced composite material prepared by the method.

The present technology relates to fluff pulp having improved odor control and methods of making such fluff pulp. A fluff pulp is provided that includes bleached kraft fibers and a copper ion content of from about 0.2 ppm to about 50 ppm by weight of the bleached kraft fibers. The bleached kraft fibers include a length-weighted average fiber length of at least about 2 mm, a copper number of less than about 7, a carboxyl content of greater than about 3.5 meq / 100 grams; an ISO brightness of at least 80; and a viscosity of from about 2 cps to about 9 cps.

A molded pulp product formed from the molding of a three-dimensional pulp slurry. The pulp slurry comprises a natural fiber composition of virgin fibers which have not been recycled and are derived from plant materials. The natural fiber composition includes hemp fibers which have been micronized to suitable length and combined with pulverized hemp shive to form a fibrous matrix. The molded pulp product is formed from a vacuum molding process, thermoforming process, custom air-burst molding process, or other molding process wherein the slurry is applied to a three-dimensional mold and a three-dimensional product is formed. The resulting packaging product is one hundred percent biodegradable.

Provided herein are mycelium materials and methods for production thereof. In some embodiments, a mycelium material includes one or more deformation areas spaced apart from each other. Additives and bonding agent may be combined with the mycelium material. Wet embossing methods of producing a mycelium material are also provided.

The invention discloses a 0.1 mu m ultra-fine filtering material as well as a preparation method and application thereof, relates to the technical field of filtering materials, and solves the problems of insufficient precision and high maintenance cost of an existing oil filtering technology. Lignocellulose is bleached after being subjected to alkali treatment, nano cellulose fibers are obtained through a high-pressure homogenization method or an enzymolysis method, and the nano cellulose fibers are dispersed in water to be subjected to ultrasonic treatment to obtain main slurry; modifying the surface of the mesoporous SiO2 by using a silane coupling agent; adding chopped aramid fibers, surface-modified mesoporous SiO2 and nano-silver into the main slurry, and uniformly mixing with stirring and ultrasonic treatment; performing vacuum filtration on the crude fiber slurry to obtain a supporting layer; performing vacuum filtration on the slurry to obtain a middle layer; performing vacuum filtration on the main slurry to obtain a surface layer, pressing the three layers together, and sequentially performing pre-freezing, freeze-drying and chemical crosslinking; carrying out hot-pressing wrinkle treatment, and then spirally winding; a polypyrrole coating is electrostatically sprayed on the surface, and then a fluorosilane oleophobic coating is subjected to vapor deposition. The device can be applied to lubricating oil filtration and has a wide application prospect.

Disclosed are non-wood pulps having a fiber length greater than about 1.70 mm and a Very Long Fiber (VLF) content of about 0.50% or less. The fibers are readily dispersible in water and useful in the formation of fibrous sheets, particularly wet-laid sheets and more particularly wet-laid tissue sheets having a relatively low basis weight. In addition of having a relatively long fiber length and a low VLF content, the pulps may also have a Dispersivity Index of about 2.00 or less, which is indicative of a relatively narrow fiber length distribution. The pulps may be prepared from plants of the family Asparagaceae by mechanical pulping and more preferably by a chemi-mechanical pulping process using an alkaline and hydrogen peroxide where the plant biomass is cut to size prior to pulping.

The present invention relates to a method for manufacturing a laminate (8) comprising a paper substrate and a microfibrillated cellulose (MFC) layer. An MFC suspension containing 50 to 100% by weight of MFC is provided. A wet MFC layer (1) is formed by casting the suspension onto a metal belt support (2), and the dry content of the formed wet MFC layer (1) is 1 to 40% by weight. A paper substrate having a Gurley-Hill air permeability of less than 10,000 s / 100 ml is provided and joined to the wet MFC layer (1) positioned on the metal belt support (2) to form a laminate structure (6). The laminate structure (6) positioned on the metal belt support (2) is dewatered to form the laminate (8). The dewatering includes at least one drying step including drying by at least one non-contact drying device (7), and the metal belt support (2) is heated during at least one drying step. The present invention also relates to the laminate (8) and a packaging material comprising the laminate (8).

The invention provides multifunctional composite fiber reinforced decorative base paper and a preparation method thereof. The decorative base paper is prepared from the following raw materials in parts by weight: 30-60 phr of wood pulp fibers, 15-35 phr of bamboo fibers, 1-10 phr of polyester fibers, 1-10 phr of polyamide fibers, 57-91 phr of an antibacterial reinforcing agent, 3-20 phr of a flame retardant and 1-10 phr of nano cellulose. The antibacterial reinforcing agent is prepared from the following components in parts by weight: 1 to 5 phr of silver nitrate, 3 to 10 phr of tetrabutyl titanate, 2 to 8 phr of sulfydryl modified chitosan, 50 to 70 phr of absolute ethyl alcohol and 2 to 6 phr of plant essential oil; the flame retardant is a composition of ammonium polyphosphate and aluminum hydroxide wrapped by chitosan. According to the invention, the composite fiber prepared by compounding four fibers is used, and the antibacterial agent, the flame retardant and the nano cellulose are added to supplement functionality, so that the multifunctional composite fiber reinforced decorative base paper with high strength, excellent wear resistance and excellent antibacterial performance is obtained, and the fireproof performance of the multifunctional composite fiber reinforced decorative base paper reaches the national B1-level fireproof standard.

This application provides a method for applying a plant-extracted bioenzyme to paper pulp treatment. Specifically, it involves applying plant-extracted peroxidase to the pre-bleaching delignification treatment of mechanical pulps from bamboo, reeds, and eucalyptus using H2O2. Key parameters in the treatment process, such as enzyme dosage, treatment time, and H2O2 addition, are optimized. The optimal treatment scheme is determined by measuring the total lignin and surface lignin content and fiber morphology of the treated samples. This optimal scheme is more effective in improving the fiber strength and brightness of the treated pulp compared to conventional enzyme treatment methods. Furthermore, molecular docking simulations are performed using a model of the plant-extracted peroxidase and lignin model compounds (LMCs) with different degrees of polymerization to obtain information on the interaction between the enzyme and LMCs, revealing the mechanism of action between peroxidase and lignin. This provides reliable evidence and technical reference for the feasibility of using plant-extracted peroxidase to remove surface lignin from mechanical pulp and promote subsequent H2O2 bleaching.

The present disclosure provides cellulose based adsorbents and their use in removing impurities from liquids, including water. The celluloses are alkylamine functionalized celluloses which may be contacted with a liquid, including water, to remove impurities therefrom.

The present disclosure relates to a polymer complex. According to the present disclosure, there is provided a polymer complex capable of exhibiting excellent mechanical properties while being environmentally friendly by including cellulose fibers as a reinforcing material.

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.

To provide an antiviral sheet that has good mechanical properties, is capable of suppressing the separation of antiviral / deodorant / antibacterial ingredients, and also has good antiviral / deodorant / antibacterial effects.SOLUTION: The antiviral sheet has an antiviral activity value (Mv) of at least 2.0 against influenza viruses or feline caliciviruses in an antiviral test method for textile products according to JIS L 1922:2016, and comprises a metal-containing cellulosic fiber containing one or more metal ions and / or metal particles selected from the group consisting of Ag, Au, Pt, Pd, Ni, Mn, Fe, Ti, Al, Zn, and Cu.SELECTED DRAWING: None

The invention provides a method for preparing nanocellulose by using a phellinus igniarius substrate as a raw material, and belongs to the technical field of green biomass refinement, the method comprises the following steps: crushing and sieving the phellinus igniarius substrate, repeatedly washing with deionized water, and filtering to obtain phellinus igniarius substrate filter residues; bleaching the phellinus igniarius substrate filter residues with alkali liquor and bleaching liquor at the same time to obtain cellulose; the method comprises the following steps: carrying out enzymolysis on cellulose by utilizing an enzymolysis method, and carrying out centrifugal separation, acid flocculation, centrifugal washing and freeze drying to obtain the nano cellulose. The hydrogen peroxide is used for bleaching the cellulose, so that pigments can be effectively removed, the damage to the cellulose is smaller than that of other bleaching agents, and no chemical substance harmful to the cellulose is left after bleaching. By changing the enzymolysis conditions and the centrifugal rotating speed, three different supernates can be separated, and different nano-crystalline cellulose can be extracted from the supernates to meet the requirements of different applications. And resource utilization of the phellinus igniarius substrate is realized, and waste is turned into wealth.

The invention discloses a corrugated board and a preparation method thereof, the corrugated board comprises surface paper, core paper and inner paper, the core paper is of a wave-shaped structure, and the surface paper and the inner paper are bonded with the core paper through an adhesive; the paper pulp formula of the surface paper, the core paper and the inner paper comprises the following raw materials: regenerated wood pulp, bamboo pulp, nano cellulose, modified starch and nano silicon dioxide. The corrugated board has the advantages of obdurability, high compression resistance and buffering performance and excellent waterproofness.