77 results about "Cellulose pulp" patented technology

A method of manufacturing an article at least partially made of cellulose fibers comprises inserting a cellulose pulp comprising cellulose fibers and water into a mixing cavity; applying a high shear mixing action to the cellulose pulp using a high-shear mixer, such that a foam blend comprising cellulose fibers, water and air bubbles is created; inserting the foam blend into a mold cavity; and molding the article by heating the foam blend contained within the mold cavity.

This invention discloses a heterolayer-coupled cellulose-based composite membrane with impact resistance and fatigue resistance, and its preparation method. The membrane comprises: a rigid support layer composed of cellulose pulp, providing overall structural support and dimensional stability; and a flexible crosslinked layer located on the surface of the rigid support layer, composed of gelatin treated with a DES solvent system and crosslinked with glutaraldehyde, used to absorb impact energy and disperse stress. The rigid support layer and the flexible crosslinked layer form a heterolayer-coupled structure. By adjusting the modulus difference between the two layers, the bending stability and durability of the composite membrane under repeated loading and dynamic impact conditions are improved. The bilayer cellulose-based composite membrane of this invention exhibits excellent impact resistance, good fatigue resistance, and structural stability under dynamic impact and repeated bending conditions.

The present application provides a cellulose / acetyl cellulose composite fiber and a preparation method thereof, the preparation method comprising the following steps: mixing and crushing cellulose pulp and acetyl cellulose sheets, adding a low-concentration NMMO solution and a surfactant for stirring and impregnation, and obtaining a suspension after the material is fully mixed and impregnated; obtaining a blending spinning solution after the suspension is subjected to two-stage reduced-pressure evaporation and dehydration; and spinning the blending spinning solution by dry-jet wet spinning to obtain the composite fiber. The composite fiber prepared by the present application has the performance advantages of lyocell fiber and acetyl cellulose, excellent mechanical properties, and improved fibrillation performance. The fabric has the advantages of air permeability, skin friendliness, moisture absorption, easy drying, comfort, natural degradation, green environmental protection, and good application prospect in high-end textiles and garments.

Wipers are disclosed formed from two, three, or more fibrous sheets. The fibrous sheets or plies are attached together by embossing a pattern into opposite sides of the product such that at least some of the embossments on one side align with at least some of the embossments on the opposite side. The resulting wiper includes outer layers primarily made from polymer synthetic fibers and a middle layer comprised primarily of cellulose fibers, such as cellulose pulp fibers. The wipers can be formed without any thermal bonding or ultrasonic bonding and can be formed without containing any polyester fibers. The wipers have demonstrated excellent oil absorbency.

The invention aims to provide a preparation method and application of a nano-zinc oxide cellulose-based composite hydrogel film with antibacterial activity, and belongs to the field of food preservation. Comprising the following steps: preparing a sodium hydroxide-urea-water composite solvent system, pre-cooling to-12 DEG C, adding cellulose, stirring for 20 minutes to obtain cellulose slurry, adding 1.1 wt% of MBA cross-linking agent into the slurry, stirring at room temperature for 1.8 hours, respectively adding nano-zinc oxide powder into the slurry, stirring at room temperature for 1 hour until the materials are uniformly mixed, centrifuging at 1500 rpm for 10 minutes to remove suspended bubbles, and drying to obtain the nano-zinc oxide cellulose. And injecting the centrifugate into a flat glass plate mold, standing to complete gelation and film formation, after demolding, soaking in a weak acid solution and deionized water to be neutral, immersing the obtained gel into 10% w / v glycerol for solvent replacement, after 6 hours, cleaning the glycerol on the surface by using distilled water, and drying at 45 DEG C for 8 hours to prepare the nano-zinc oxide composite cellulose film. The strawberry fresh-keeping film is used for strawberry fresh-keeping, can effectively delay strawberry weightlessness, rotting and flavor substance loss, and has a fresh-keeping effect obviously better than that of a traditional PE film and non-packaging treatment.

The invention discloses a synergistic preparation method and application of carboxylated cellulose nanocrystals and regenerated cellulose, and belongs to the technical field of cellulose nanomaterial preparation. The synergistic preparation method of the carboxylated cellulose nanocrystal and the regenerated cellulose comprises the following steps: carrying out dipping treatment on a cellulose raw material in a Lewis acid solution, then carrying out solid-liquid separation, and collecting a solid-phase component to obtain cellulose slurry; dispersing the cellulose slurry in a polycarboxylic acid solution, reacting, and then filtering and collecting a solid product; treating the solid product by a method I or a method II; the method I comprises the following steps: carrying out separation treatment on the solid product to obtain carboxylated cellulose nanocrystals and regenerated cellulose; and the method II comprises the following steps: washing the solid product, and then carrying out suction filtration to obtain the holocellulose composite membrane.

The invention relates to the field of cellulose paper pulp materials, in particular to an environment-friendly corrugated carton material and a preparation method thereof. The environment-friendly corrugated carton material structurally comprises a surface layer located on the surface, a core layer located in the middle and a bottom layer serving as a lower base. The surface layer is prepared from surface layer plant cellulose pulp, a polymerization composition, a function enhancer, an adhesive, a wet strength agent, a waterproof agent, water and the like. The environment-friendly corrugated carton material provided by the invention not only can keep excellent mechanical properties, but also can balance the performance contradiction of the existing materials, so that the comprehensive performance of the materials is ensured, and the application quality and the application field of the environment-friendly corrugated carton material are improved.

A process for preparing paper pulp, comprising the following steps: - mixing (E10) a mass percentage of a fibrous by-product (10) with a complementary mass percentage of cellulose pulp (20), wherein the fibrous by-product (10) comprises at least one of the following: coffee husks obtained from roasting coffee beans, the coffee husks having a mass percentage of water-soluble compounds greater than 15% and a mass water content less than 20%, and textile dust having a length of less than 5 mm; and - refining (E20) the mixture to obtain the paper pulp. Figure for the abstract: Fig. 1

The invention relates to the technical field of functional paper-based materials, in particular to a paper-based antistatic diaphragm and a preparation method thereof. The method comprises the following steps: 1) carrying out enzymolysis modification on coniferous wood pulp to prepare cellulose pulp; (2) carrying out in-situ polymerization-wet-process papermaking forming on the cellulose paper pulp to obtain a paper base material; and 3) coating the single surface of the paper base material with the carbon-based slurry, and calendering to obtain the paper-based antistatic diaphragm. The diaphragm has good anti-static performance and mechanical performance, can be effectively used for packaging products with anti-static requirements such as drugs, electronic components and precision components, and has potential possibility of being used as a special electrochemical system diaphragm due to higher ionic conductivity generated by synergy on the basis.

The application discloses a chrysochlamys zollingeri extract functionalized viscose fiber and a preparation method and application thereof, and belongs to the technical field of functional fiber material preparation.The chrysochlamys zollingeri extract functionalized viscose fiber is formed by wet spinning process of a viscose original solution containing microcapsules, and the viscose original solution containing microcapsules is prepared by mixing a viscose original solution and chrysochlamys zollingeri extract / porous starch composite microcapsules, wherein the viscose original solution is prepared by impregnating cellulose pulp with a sodium hydroxide aqueous solution, carbon disulfide yellowing, and then dissolving and aging in a sodium hydroxide aqueous solution.The chrysochlamys zollingeri extract functionalized viscose fiber is prepared by microcapsule embedding combined with a mild spinning process, so that active ingredients of the chrysochlamys zollingeri extract are maximally retained, long-acting, stable and slow release and anti-inflammatory and soothing effects are achieved, the chrysochlamys zollingeri extract functionalized viscose fiber can be further processed into a functional fabric through a water jet process, and is suitable for high-end sanitary material fields such as infant paper diapers.

The invention relates to a capsule (1) for receiving a substance for preparing a beverage, said capsule comprising a body having a side wall (2) bordered on either side by a base (3) and by a rim (4) surrounding an opening (5) in said body, the body being formed by moulding a cellulose pulp, and the side wall (2) of said body being covered with a sealing label (18).

The present application relates to a kind of preparation lyocell fiber with corn stalk as raw material method, comprising:1) organic solvent pretreatment: corn stalk particles are placed in the mixed solvent of ethanol and water and are handled to obtain pretreated particles;2) alkali oxygen synergistic treatment: pretreated particles are added to the mixed solution containing sodium hydroxide and hydrogen peroxide to obtain alkali oxygen treated material;3) high temperature hot water treatment to obtain corn stalk cellulose;4) washing and drying to obtain corn stalk cellulose pulp;5) pulp swelling to obtain swollen material;6) vacuum heating dissolution: reduced pressure distillation concentration, to obtain spinning dope;7) spinning coagulation and post-processing.The quality of corn stalk cellulose pulp obtained by the method is good, the prepared lyocell fiber has excellent mechanical properties, and has the advantages of high softness, good dyeing degree, high hygroscopicity, etc.;The process is green and environmentally friendly, and meets the requirements of clean production;Realize the high-value conversion of agricultural waste corn stalk, and have good economic and social benefits.

The present invention relates to a system for treating delignified cellulose pulp, comprising: consecutive first and second washing devices configured to receive and wash delignified cellulose pulp; an acidic bleaching device arranged to receive cellulose pulp from the second washing device; the post-acid-bleaching washing device is connected to the acid bleaching device and is used for washing the cellulose pulp received from the acid bleaching device; an alkaline bleaching device arranged downstream of the washing device; the alkaline bleaching post-washing device is connected to the alkaline bleaching device and is used for washing the cellulose pulp received from the alkaline bleaching device; a filtrate feeding means arranged to recycle the waste washing liquid from the post-alkaline-bleaching washing means as a diluent between the first washing means and the second washing means and / or as a washing liquid to the first washing means; and a source of water and / or condensate connected to the second washing device to provide a washing liquid.

The invention discloses a preparation method for prolonging the validity period of erythromycin ethylsuccinate orally disintegrating tablets. The preparation method comprises the following steps: sequentially putting low-substituted hydroxypropyl cellulose, microcrystalline cellulose, aspartame, carboxymethyl starch sodium and polyvinylpolypyrrolidone into a wet granulation mixer, covering with a cover, starting equipment, carrying out low-speed dry mixing for 3 minutes, slowly adding low-concentration hydroxypropyl methylcellulose slurry from a feed port of a pot cover, and carrying out low-speed wet mixing for 3 minutes; stopping the machine, opening the cover, scraping powder on the inner surface of the pot cover and the periphery of the inner side of the pot by using a clean scraper, adding erythromycin ethylsuccinate raw materials, covering the cover, starting equipment, carrying out low-speed wet mixing for 3 minutes, and carrying out high-speed wet mixing for 2 minutes. By improving the medicine production process, the stability and durability of the medicine are improved, so that the validity period of the medicine is prolonged, and meanwhile, the effectiveness and safety of the medicine can still be kept within the prolonged validity period.

This disclosure relates to lyocell materials, smoking articles including the thereof, and methods for preparing said lyocell materials, wherein the lyocell materials can be prepared from a stock solution comprising a cellulose slurry and N-methylmorpholine-N-oxide (NMMO), wherein the cellulose slurry can have a CED viscosity of 4.0 to 11.0, a hemicellulose content of less than 5% by weight, an Fe content of at least 1 ppm and less than 30 ppm by weight, and a Si content of at least 1 ppm and less than 100 ppm by weight.

The utility model discloses a kind of cellulose pulp small bale steel wire winding recovery devices, it is related to viscose fibre production technical field, including the winding of steel wire and is rolled up to the winding component of steel wire, the clamping component of limiting steel wire displacement, the unwinding component for unwinding and winding stand, the winding component, clamping component and unwinding component are set in winding stand top;The winding component includes winding motor and winding shaft, and the winding motor is connected with winding stand top surface, winding shaft is connected with winding motor transmission by speed reducer.The winding of steel wire after shearing is wound on winding shaft by winding component, clamping component is clamped to steel wire, prevent steel wire displacement in winding process, unwinding component is unwound from winding shaft after winding steel wire to unwinding component, realize full-automatic recovery steel wire, improve the production efficiency of this process, reduce artificial labor intensity, reduce labor cost, reduce security risk.

Nonwoven materials containing cellulose pulp fibers combined with microfibers are disclosed. The microfibers also have a relatively long length. By utilizing a foam forming process, the fibers can be uniformly mixed together to produce a fiber web with significantly high strength properties. By using microfibers, the fiber number / area can be greatly increased, thereby creating a fiber network within the nonwoven structure.

A smoking article (120) includes a tobacco rod (122) comprising a column of filler and a wrapper (123) surrounding the column of filler. The tobacco rod (122) has a circumferential direction, a longitudinal direction (142), a lit end (124), and a mouth end (130). The wrapper (123) includes a base web (140) having generally parallel first and second side edges extending in the longitudinal direction (142) and two ends extending in the circumferential direction wherein the base web (140) is disposed around the column of filler such that the first and second side edges of the base web (140) overlap and form a seam. The base web (140) includes at least one circumferentially extending banded region (126) of fibrous crystalline cellulosic material (126) thereon. The fibrous crystalline cellulosic material (126) is in a condition of having been gravure printed on the base web (140) as a fibrous crystalline cellulosic slurry that comprises water, crystalline cellulose, and chalk wherein the fibrous crystalline cellulosic slurry has a solids content of about 10% or less by weight of the fibrous crystalline cellulosic slurry.

The present application relates to the technical field of fiber production process control, especially to a preparation method of a high-spinnable flame-retardant lyocell fiber with precipitation resistance, comprising the following steps: S1. treating cellulose pulp and regulating hemicellulose through a low-temperature activation process; S2. selecting a flame retardant and adjusting the crystal face exposure ratio of the flame retardant; S3. uniformly mixing the treated cellulose pulp and the flame retardant; S4. then performing free radical scavenging treatment to prepare stable spinning solution; S5. performing spinning through a dry-jet wet spinning process to ensure uniformity of the yarn formation; S6. performing crosslinking treatment on the nascent fiber; and S7. performing quality detection on the finished fiber and screening qualified products. The present application precisely controls the uniform distribution of the crosslinking agent in the fiber cross section through a radial penetration lag gradient formula of the crosslinking agent, ensures the dispersion stability of the flame retardant in the spinning solution, makes the flame retardant and the cellulose molecules form a firm crosslinking combination, effectively locks the flame-retardant components, meets the long-term use requirements of textiles, and improves the safety of the products.

The present invention relates to a highly refined cellulose pulp (HRC) composition for preparation of barrier papers or films, said composition comprising: 50-99 wt% HRC having a Schopper-Riegler number (SR) > 70, as measured according to the standard ISO 5267-1, and 1-50 wt% of compression refined cellulose pulp having a Schopper-Riegler number (SR) < 30, as measured according to the standard ISO 5267-1, and a water retention value (WRV) > 120%, as measured according to the standard ISO 23714, based on the total dry weight of the HRC composition. The invention further relates to an HRC paper or film and a multilayer material comprising the HRC composition.

The invention discloses transformer cellulose insulation paper with strong hydrophobicity and high thermal conductivity and a preparation method thereof. The preparation method comprises the following steps: preparing cellulose insulation paper pulp; the preparation method comprises the following steps: carrying out surface modification on nano boron nitride (BN) particles by using a silane coupling agent, and blending with cellulose paper pulp to prepare mixed pulp; the preparation method comprises the following steps: mixing polytetrafluoroethylene (PTFE) nano particles and polydimethylsiloxane (PDMS) particles according to a specific proportion to prepare a hydrophobic coating solution; and uniformly coating the coating solution on the surface of the modified cellulose insulation paper through an impregnation method, and finally drying, curing and forming. Through nano particle modification and surface hydrophobic coating treatment, the heat-conducting property and hydrophobic property of the cellulose insulation paper are remarkably improved, the risks of moisture invasion and heat accumulation are effectively reduced, aging degradation is slowed down, the service life of a transformer oil paper insulation system is prolonged, and the service life of the transformer oil paper insulation system is prolonged. And the operation stability and safety of the transformer in high-voltage, high-temperature and humid environments and the like are enhanced.

Embodiments of the present invention enhance the properties of cellulosic pulp by infusing the cellulosic form, overcoming the deficiencies of the prior art. For example, these properties can include mechanical and barrier properties, i.e., tensile strength, liquid (e.g., water, oil, sauce) and gas (e.g., oxygen or carbon dioxide) impermeability are greatly improved. Another embodiment of the present invention further provides automated equipment and systems to produce fiberized cellulosic composites, including properties as strength enhancers, oligomerization agents, carbohydrates, plasticizers, antibacterial agents, water repellents, and / or transparent composites.

The invention discloses a self-floating biomass-based solar evaporator, and belongs to the technical field of seawater desalination. A simplest mixing method is adopted, green and environment-friendly cellulose slurry, low-cost carbon black and the like are mixed to obtain a black substance which serves as a light absorption material, calcium carbonate serves as a cross-linking agent, and the calcium carbonate, chitosan and sodium alginate act to form a skeleton structure in a cross-linking mode, so that the aerogel has good stability, and the light absorption performance of the aerogel is improved. The evaporation rate can reach 3.03 kg m <-2 > h <-1 >. Water molecules are dissociated to form aerogel with the minimum damage degree by adopting a freeze drying method, so that the aerogel has good rebound resilience and dry compression resistance, transportation and long-time use of materials are facilitated, and sustainable development of efficiency and low cost in the field of photo-thermal evaporation is effectively achieved.

A method for recovering cellulose from a cellulose containing textile raw material containing dyed textiles, the method comprising subjecting a disintegrated textile raw material to an oxidative pretreatment before alkaline cooking and any further processing of the cellulose pulp obtained after the alkaline cooking. After cooking, spent alkaline cooking solution containing dye and dye residues is withdrawn from the textile derived cellulose pulp and is transferred to a recovery boiler in a Kraft pulp mill. An apparatus for carrying out the method is also disclosed.

The invention discloses a TEMPO-based oxidation modified hard carbon paper negative electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out TEMPO oxidation pretreatment on cellulose paper pulp, and molding the obtained oxidized cellulose into raw paper through a wet papermaking process; and performing high-temperature carbonization treatment on the raw paper in a protective atmosphere to obtain the hard carbon paper negative electrode material. The obtained hard carbon paper negative electrode forms rich nanoscale sodium storage active sites after being carbonized, the platform capacity proportion is successfully increased to about 80%, the sodium storage characteristic close to the whole platform is achieved, and the energy density of the sodium ion battery is remarkably improved. In addition, the platform capacity of 250.1 mAh / g can still be achieved under the ultrahigh loading capacity (13.3 mg / cm < 2 >). Meanwhile, the integrated electrode structure does not need an additional current collector, an adhesive and a conductive agent, and shows excellent electrochemical performance and industrial application potential.

Paper cup (1) without plastic coating comprising of cup wall (2) forming hollow truncated conical shape (7), bottom (6) sealing hollow truncated conical shape (7) at its smaller diameter end (4), curl profile (5) formed at larger diameter end (3) of cup wall (2) and knurl profile (22) formed at smaller diameter end (4) of cup wall (2) and method of its manufacturing is disclosed. Cup wall (2) and bottom (6) is made up of paperboard composed from 94-96% of cellulose pulp, 1-2% of starch and 2-3% of rosin without any synthetic coatings or polymers. Welding adhesive used is polyolefin particles of 5-8 µm size uniformly disperse in water. By minimizing use of plastics and focusing on sustainable materials, present paper cup (1) and manufacturing process ensures compliance with regulatory requirements and supports production of high-quality, eco-friendly paper cups.

The present invention relates to a method for manufacturing a barrier film comprising highly refined cellulose, said method comprising: a) providing a highly refined cellulose pulp suspension comprising highly refined cellulose pulp having a Schopper-Riegler (SR) number in the range of 40-98 as determined by standard ISO 5267-1 and a content of fibers having a length >0.2 mm of at least 7 million fibers per gram based on dry weight, at a consistency in the range of 0.1-1.5 wt %; b) forming a web of the highly refined cellulose pulp suspension and dewatering the web in a paper machine former on a wire to a consistency of at least 5 wt % to obtain a substrate web, wherein the white water removed from the pulp contains 2-25 wt %, preferably 5-20 wt % and more preferably at least 5-15 wt % of the solids of the highly refined cellulose pulp suspension provided in step a); c) optionally further dewatering and optionally drying the substrate web; d) coating the optionally further dewatered and optionally dried substrate web with a coating suspension comprising cellulose fines or microfibrillated cellulose to obtain a coated web; and e) dewatering and / or drying the coated web to obtain a barrier film comprising highly refined cellulose.

The invention relates to the technical field of functional paper and environment-friendly coatings, and particularly discloses a preparation method of water-based wrapping paper. The method comprises the following steps: firstly, carrying out surface oxidation on base paper containing cellulose pulp by adopting sodium periodate, and introducing aldehyde groups to construct an active skeleton; secondly, designing and synthesizing a star polymer with beta-cyclodextrin as a core and carboxyl at the tail end of multiple arms, and synergistically grafting the star polymer and a silane coupling agent on the surface of the nano silicon dioxide to form a molecular brush type hybrid anti-sticking unit; and finally, preparing a coating liquid from the hybrid unit, carboxymethyl chitosan and the like, applying the coating liquid to pre-oxidized base paper, and triggering multiple in-situ solid-state reactions among aldehyde groups, amino groups, carboxyl groups and hydroxyl groups through programmed heating and drying, so as to construct a fiber-polymer-nanoparticle chemically bonded three-dimensional hybrid network coating on the paper surface. The wrapping paper prepared by the method has the advantages of lasting anti-sticking property, high strength, good printability, controllable moisture resistance and the like, is water-based and environment-friendly in the whole process, and is suitable for high-oil and high-moisture food packaging.

The invention relates to a process for producing a viscose solution, which comprises adding an ethoxylated C12-C14 isomeric fatty alcohol with an average degree of ethoxylation of 5-12 as a surfactant before or during the impregnation step of the cellulose pulp. The invention also relates to the viscose solution thus produced.

The application discloses a preparation method of regenerated cellulose fibers, and belongs to the technical field of regenerated cellulose fibers. In view of the problems of easy fibrillation of existing fibers, brittleness caused by cross-linking modification, and insufficient strength and heat resistance, the application adopts an eight-arm hyperbranched polyhedral oligomeric silsesquioxane cross-linking modifier to blend with cellulose pulp, N-methyl morpholine-N-oxide aqueous solution, antioxidant and spinning aid to prepare a spinning dope, and the fibers are prepared through dry-jet wet spinning and post-processing. The modifier is cross-linked with the hydroxyl groups of cellulose through the epoxy groups to form a three-dimensional network, and the rigid POSS core and the flexible polyether arm are combined, so that the fibrillation is inhibited while the flexibility is maintained, the wet strength and heat resistance are significantly improved, and the technical bottleneck that the traditional modification cannot simultaneously consider the strength and toughness is solved.