256 results about "Pulp fibre" patented technology

The invention discloses a method for preparing high-quality dissolving pulp from low-grade plant fiber raw materials, and belongs to the technical field of biomass pulping. The preparation method comprises the following steps: screening a low-grade plant fiber raw material to obtain a fiber raw material of which the length is 20-30 mm, the width is 10-15 mm and the thickness is 3-5 mm; carrying out deep prehydrolysis-sulfate cooking treatment on the screened fiber raw materials to obtain unbleached sulfate pulp fibers; performing deep eutectic solvent and elemental chlorine-free bleaching treatment on the unbleached sulfate pulp fiber to obtain paper pulp fiber with low kappa number; and carrying out biological enzyme treatment on the paper pulp fibers with low kappa number to obtain the high-quality dissolving pulp. According to the method, the morphology and the structure of chemical pulp fibers are effectively regulated and controlled by designing deep eutectic solvent treatment, and deep dissolution of residual hemicelluloses and lignin is achieved; through biological enzyme treatment, the alpha-cellulose content and the Fock reaction performance are further improved, and finally the high-quality dissolving pulp is prepared.

The invention discloses a cellulose paper-based diaphragm for a zinc-iodine battery as well as a preparation method and application of the cellulose paper-based diaphragm. The diaphragm is of a three-layer composite structure and comprises a matrix layer formed by paper pulp fibers such as softwood pulp, hardwood pulp, bamboo pulp or straw pulp through a wet papermaking technology, and compact functional layers which cover the two sides of the matrix layer and are formed by oxidized nanocellulose (TOCN). The preparation method mainly comprises the following steps: preparing the paper-based diaphragm matrix through wet papermaking, coating the two sides of the paper-based diaphragm matrix with TOCN aqueous dispersion, and finally carrying out hot-pressing drying treatment to enable the three layers to be tightly combined. According to the invention, the nano aperture and the surface negative electricity functional group of the TOCN layer are utilized, so that physical blocking and electrostatic repulsion of polyiodide ions can be realized at the same time, and the shuttle effect is effectively inhibited; and the uniform pore channels can guide zinc ions to uniformly deposit and inhibit dendritic crystal growth. The diaphragm is green in raw material, simple in process and low in cost, and the cycle life and coulombic efficiency of the battery can be remarkably improved when the diaphragm is applied to the zinc-iodine battery.

The invention relates to the field of food packaging and coatings, and provides a bio-based fluoride-free environment-friendly oil-proof agent for food packaging paper and paperboards, which is simple in preparation process, green and environment-friendly and has the bio-based raw material proportion of 70% or above. The bio-based fluoride-free environment-friendly oil-proof agent is characterized in that the bio-based fluoride-free environment-friendly oil-proof agent is prepared by synergistic micro-nanocrystallization of paper pulp fibers, starch and inorganic particles under the action of high-speed shearing and grinding; the prepared oil-proof agent can be coated on the surfaces of sized or unsized paper, paperboards and paper pulp molded products by a conventional coating method, the coated finished product has good oil-proof performance, the coating weight is 1.5-15g / m < 2 >, and the oil-proof grade tested by a Kit method after drying can reach 12 grade to the maximum. Compared with a fluoride-free oil-proof agent on the market at present, the bio-based fluoride-free environment-friendly oil-proof agent disclosed by the invention can obtain good oil-proof performance under a relatively low coating weight, is biodegradable and is easy to recycle and reuse.

The invention belongs to the technical field of building materials, and particularly provides a low-carbon energy-saving fiberboard, which is prepared from the following components in parts by weight: 8 to 38 parts of steel slag, 12 to 36 parts of fly ash, 0 to 20 parts of cement, 10 to 48 parts of desulfurized gypsum, 2 to 4 parts of silica fume, 3 to 9 parts of quartz tail mud, 6 to 10 parts of dry paper pulp fiber, 0.1 to 0.48 part of gypsum retarder, 0.48 to 1.20 parts of alkali activator and 0.01 to 4.32 parts of modifier. According to the fiberboard, solid waste is adopted as a main material, an alkaline activator is adopted to excite a reaction and promote generation of calcium aluminum sulfate and other minerals, a modifier is adopted to enhance the water resistance of a gypsum-based product, recycled paper is adopted to replace part of raw paper, the production cost is reduced, fiber directional distribution is improved, and the longitudinal and transverse fracture resistance ratio of the fiberboard is increased. The steel slag pre-carbonization can effectively eliminate free calcium oxide and magnesium oxide in the steel slag, and reduces the damage of the later hydration expansion of the active alkali to the structure. And the uncarbonized tricalcium silicate and dicalcium silicate in the material are hydrated to form hydrated calcium silicate, calcium aluminum sulfate and other minerals through steam normal-pressure curing.

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 discloses a degradable waterproof and oilproof paper pulp molded product and a preparation method thereof. The preparation method comprises the following steps: S1, pretreatment of polyhydroxybutyrate; s2, preparing modified starch; s3, coating the polyhydroxybutyrate with the modified starch; s4, preparation of modified montmorillonite; and S5, preparing the paper pulp molded product. According to the paper pulp molded product, the degradable oleophobic and hydrophobic high polymer material polyhydroxybutyrate is introduced, the degradability of the paper pulp molded product is guaranteed, the waterproof and oil-proof performance of the paper pulp molded product is improved, the polyhydroxybutyrate is coated with the modified starch, the compatibility of the polyhydroxybutyrate and paper pulp fibers is improved, and the paper pulp molded product has the advantages of being environmentally friendly and free of pollution. The overall quality of a paper pulp molded product is ensured; meanwhile, the added modified montmorillonite and the modified starch coated polyhydroxybutyrate can synergistically improve the barrier property of a paper pulp molded product, and the waterproof and oil-proof properties of the paper pulp molded product are jointly improved.

The invention belongs to the technical field of mineral flotation, and particularly relates to a cellulose-based coal slime collecting agent and a preparation method and application thereof. The method comprises the following steps: performing wet grinding on recycled waste paper to obtain a paper pulp solution, stirring until paper pulp fibers are uniformly dispersed, adding excessive lithium chloride and sodium periodate, performing stirring reaction, cleaning and centrifuging to obtain precursor cellulose, performing amino alkylation modification to obtain amino alkyl cellulose, preparing the amino alkyl cellulose into a 20 g / L solution, and performing vacuum drying to obtain the lithium ion battery cathode material. And then uniformly mixing with non-polar hydrocarbon oil according to the volume ratio of 1: 2 to obtain the coal slime collecting agent. The prepared coal slime collecting agent contains the hydrophobic nanocellulose with the large length-diameter ratio, in the flotation process, adhesion of bubbles and minerals can be promoted, diffusion of the bubbles is promoted, and the flotation efficiency and the recovery rate are improved.

The invention relates to the field of Tibetan paper, in particular to mineral-containing plant fiber Tibetan paper and a preparation process thereof. A radix euphorbiae lantu root system is used as a fiber raw material, and chitosan modified talc and calcium chloride are added into paper pulp. A traditional Tibetan paper manufacturing technology is combined with a modern technology, and after chitosan modified talc and calcium chloride are added into paper pulp, the strength of the paper is improved, and meanwhile, the aging resistance is also improved. By compounding chitosan on the surface of talc, hydrogen bonds can be formed among paper pulp fibers, and the combination between talc and fibers is improved, so that the tensile strength of paper prepared from the modified talc powder is remarkably improved compared with that of paper filled with pure talc powder. Meanwhile, due to the existence of calcium chloride, more chitosan modified talc can be adsorbed on fibers, and the aging resistance of the paper is improved.

A kraft paper having a pulp according to ISO 536 of between 60 g / m2 and 120 g / m2, a density of between 680 kg / m3 and 720 kg / m3, and a tensile strength index in the machine direction according to ISO 1924-3 of between 79 kNm / kg and 98 kNm / kg, the kraft paper optionally having a coating and / or an auxiliary element on at least one side. The kraft paper is made of a pulp having an average pulp fibre length of 2.2 mm to 2.7 mm with a minimum pulp content of at least 96% wt. %; a pore volume of the uncoated kraft paper is between 200 μl / g and 220 ml / g; in the thickness direction of the paper, there are regions of different porosities; and at least one region has pores with a pore diameter of less than or equal to 0.3 μm. The invention also relates to a paper sack.

The invention relates to the technical field of packaging materials, and discloses a low-volatility carton material and a preparation method thereof. The preparation method comprises the following steps: carrying out melt blending on a modified epoxy chain extender and polylactic acid to obtain modified polylactic acid, mixing the modified polylactic acid with nano-silica to obtain a modified polylactic acid nano-composite, adding methyl cellulose and the modified polylactic acid nano-composite into a paper pulp suspension, carrying out stirring and mixing, carrying out papermaking and drying, and carrying out granulation and granulation to obtain the modified polylactic acid paper. And performing a hot pressing process to obtain the low-volatility material for the carton. The modified epoxy chain extender improves the molecular weight of the polylactic acid; a bicyclic aromatic structure of naphthyl can improve the rigidity of a chain segment, so that the mechanical property of polylactic acid is improved; silicon dioxide is connected with a polylactic acid molecular chain by a silane group through a coupling effect, so that the mechanical property is further improved; nitrogen atoms in the pyrrole group and the imidazole group enhance the hydrogen-bond interaction between the polylactic acid and the paper pulp fiber material, so that the binding force between fibers is improved; through the beneficial effects, the mechanical strength of the material for the carton is cooperatively improved.

The invention relates to the technical field of experimental animal feeding, in particular to a slow-release antibacterial experimental animal padding manufacturing formula which comprises a contact layer, a slow-release antibacterial layer and a bottom layer which form an experimental animal padding basic layer. The contact layer comprises 50% by mass of corncob particles, 30% by mass of paper pulp fibers, 15% by mass of super absorbent resin and 5% by mass of a bamboo fiber woven mesh. According to the animal padding manufacturing formula, the ammonia gas adsorption capacity is remarkably improved, cleaner and healthier survival conditions are provided for experimental animals, the lasting antibacterial effect is achieved, the welfare of the experimental animals and the accuracy of experimental data are further improved, the excellent adsorption and antibacterial capacity is achieved, and the animal padding has the good application prospect. Remarkable economic benefits are brought to experimental animal feeding mechanisms, the survival rate of experimental animals using the animal padding is increased by 5%, and the safety of the animal padding is further proved.

A method for coating products is provided. The method includes the steps of applying a coating liquid to a product and removing excess coating liquid from the product. It is desirable to provide a method for efficiently and reliably coating delicate or easily deformable products, such as products molded from a pulp fiber slurry. The method includes fixing the product to a receiving portion of a product carrier that is configured in the same shape as the product, such that an exterior surface of the product abuts the interior concave surface of the receiving portion of the device. A coating liquid is applied to the product in the product carrier. The product carrier is affixed to a centrifuging device and the coating liquid is dispersed over the surface of the product using centripetal force.

A filter material for manufacturing a segment of a smoking article is described. The filter material includes a hydro-entangled nonwoven, which includes fibers. The fibers are selected from the group consisting of pulp fibers, fibers of regenerated cellulose and mixtures thereof. These fibers are contained in the nonwoven in an amount of 50% to 100% of the mass of the hydro-entangled nonwoven. The nonwoven is in the form of a web, has a longitudinal direction in the running direction of the web, a cross direction orthogonal thereto and lying in the plane of the web and a thickness direction orthogonal to longitudinal direction and the cross direction. The nonwoven is shaped to have a wave structure in the plane formed by the cross direction and the thickness direction with a wave height from 50 μm to 1000 μm and a wave length from 150 μm to 5000 μm.

A material for a smoking article includes non-pulp fibers and a hydrophobic substance. The non-pulp fibers are preferably plant-derived.

The invention provides a paper-based buffer material based on dry forming and radio frequency heating consolidation and a preparation method of the paper-based buffer material, and belongs to the technical field of buffer packaging materials. Paper pulp fibers, bi-component hot melting fibers and functional fibers are subjected to fiber burdening and mixing, dry forming, radio frequency heating consolidation and cooling setting, and finally the high-performance paper-based buffer material is obtained. The preparation method has the advantages of greenness, high efficiency, no water addition and low energy consumption.

A tool for a thermoforming process to form a moulded product from wet pulp fibre material includes two or more moulds each having a moulding surface, an actuator assembly, and a fluid extraction system. At least one of the moulds is displaceable by the actuator assembly between first and second positions and has fluid extraction paths extending through the mould to transport fluid away from the moulding surface. One of the moulds has a first layer that is substantially rigid to form a support member and is in communication with a heating subsystem of the fluid extraction system, and a second layer that is, in use of the tool, between the first layer and the wet pulp fibre material. The second layer is formed of a material that has interconnected internal voids forming part of the fluid extraction paths and has a lower heat transfer coefficient than the first layer.

The invention discloses high-smoothness paper for daily use and a preparation method thereof. The method comprises the following steps: applying a cationic softening agent (the addition amount is 0.8%-1.2%) to paper pulp fibers, and carrying out physical swelling treatment (0.15-0.20 MPa, 20-30 minutes); then grinding under the power of 280-310 kW, and controlling the concentration to be 3.5%-4.0%; and finally, forming on a 120-140-mesh forming net under the calendering pressure of 0.25-0.30 MPa, drying at the temperature of 110-120 DEG C for 15-20 seconds, and wrinkling. An on-line detection and feedback system can be integrated, and key parameters can be dynamically adjusted. The softness of the prepared household paper is 6.0-8.0 mN, the smoothness is 45-55 s, the wrinkle depth deviation is less than or equal to 0.02 mm, and the raw materials are hardwood pulp and softwood pulp in a ratio of 8.5: 1.5. According to the scheme, unification of softness, smoothness and high strength is achieved, the problems of performance contradiction and unstable production in a traditional process are solved, and the method is suitable for continuous intelligent manufacturing of high-end household paper.

The invention relates to the technical field of cigarette packaging materials, in particular to environment-friendly lining paper and a preparation method thereof. The problem that the environment-friendly lining paper is insufficient in tensile strength and barrier property is solved. Paper pulp fibers are compounded with nano fibrillated cellulose and homogenized under high pressure, cationized lignosulfonate and nano montmorillonite slurry are compounded in homogenized slurry, glyoxal is used for in-situ crosslinking, and an internal'brick-mud 'bionic barrier structure is constructed; after the paper sheet is formed, the surface of the paper sheet is coated with an acetylation modified hemicellulose blocking agent, thermocuring is carried out, a gradient structure is constructed cooperatively, the tensile strength, the water vapor blocking property and the aroma blocking property of the lining paper are improved, and the used raw materials are derived from biomass and natural minerals and are green and environment-friendly.

A capsule for use in preparing a beverage in a beverage preparation device that has a brewing chamber. The capsule has a body having a cup shape that defines an internal cavity within which to contain a beverage ingredient, and a flange that extends radially outwardly from a mouth of the body. The flange includes a chamber engagement portion that, during preparation of a beverage, is to be in engagement with components of the beverage preparation device that define the brewing chamber. The body and the flange are formed of compressed pulp fibre material. The chamber engagement portion of the flange has a density of the pulp fibre material that is less than the maximum density of the pulp fibre material in the body.

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.

To provide an absorbent article having both of thinness and water absorption and hardly shifted.SOLUTION: An absorbent article 10 includes a top sheet 11, a back sheet 12 and an absorber 13. The absorber 13 includes an upper layer absorber 15, a lower layer absorber 16, a first intermediate sheet 17 wrapping both of the upper layer absorber 15 and the lower layer absorber 16, and a second intermediate sheet 18 disposed between the upper layer absorber 15 and the lower layer absorber 16. The upper layer absorber 15 includes: 40-100 wt.% of pulp fibers having a basis weight of 50 g / m2-130 g / m2, and 0-60 wt.% of highly-absorbent polymer. The lower layer absorber 16 does not contain the pulp fibers and is constituted with the highly-absorbent polymer. The upper layer absorber 15 and the lower layer absorber 16 are provided with slits 19, 20 extending in a longitudinal direction. A plurality of protrusion parts 14 is formed on the top sheet 11, and the length of the protrusion parts 14 in the width direction is longer than the length of the protruding part 14 in the longitudinal direction.SELECTED DRAWING: Figure 2

The present disclosure provides a stretchable paper comprising at least 90% by dry weight of kraft pulp fibres, wherein the stretchability according to ISO 1924-3:2011 of the paper is at least 8.0 % in the machine direction (MD) and the cross direction (CD) and wherein the paper comprises 5-10 kg / tonne of cationic starch based on dry weight of the paper, 0.25-1.00 kg / tonne of AKD or ASA based on dry weight of the paper, 1.00-3.00 kg / tonne of rosin size based on dry weight of the paper and 0.5-5.0 kg / tonne of glyoxylated polyacrylamide (G-PAM) based on dry weight of the paper.

The application discloses a pulp bleaching method based on electric field gradient coupling oxygen nucleus. The method comprises the following steps: adding pulp into a reaction kettle, adding alkali and a protective agent, stirring and mixing, and heating; when the temperature is heated to 90-100 DEG C, the temperature is kept, a direct current electric field is applied to the reaction kettle and oxygen is introduced under high-speed stirring, and reaction is carried out for 3-5 min; reaction is carried out for 30-120 min under low-speed stirring. The method solves the problems of low reaction efficiency and low oxygen utilization rate in the existing oxygen delignification process. By applying a direct current electric field to the outer wall of the reaction kettle, the oxygen molecules are separated by the electric field force, and the combination ability with the surface of the pulp fiber is improved. The method significantly improves the removal efficiency of lignin, and significantly improves the pulp brightness and Kappa number. The application is suitable for the field of pulping and papermaking, and has important significance for the bleaching process with high environmental protection requirements.

The invention provides a method for manufacturing paper with high filler content. The method for producing paper having a high filler content comprises: a paper stock production step (S1) in which a filler containing titanium dioxide is added to a pulp slurry to obtain a paper stock; an amphoteric polyacrylamide addition step (S2) in which an amphoteric polyacrylamide is added to the paper material in a range of 0.005-3 mass% with respect to the total mass of the solid content of the pulp fibers and the filler; and a papermaking step (S3) for papermaking the paper material to which the amphoteric polyacrylamide has been added, in which the content of titanium dioxide in the paper material obtained in the paper material production step (S1) is 1 mass% or more relative to the total mass of the solid content of the pulp fibers and the filler, and the content of titanium dioxide in the paper material obtained in the paper material production step (S1) is 1 mass% or more relative to the total mass of the solid content of the filler. And the content of the filler containing titanium dioxide is in the range of 8.5 mass% to 50 mass% (inclusive).

A cigarette filter that reduces harmful smoke components is disclosed. In one view, the present invention provides a cigarette filter comprising a paper sheet, wherein the paper sheet comprises pulp fibers and chitosan fibers, and the pulp fibers comprise at least one of single fibers and mixed fibers having an average coarseness of 13 mg / 100 m or more.

To increase the rigidity and strength of paper mannequins. [Solution] A paper mannequin doll 1 containing mulberry fibers and pulp fibers, wherein the mixing ratio of mulberry fibers to pulp fibers is in the range of mulberry fibers:pulp fibers = 1:1 to 1:3 by mass ratio.

The invention relates to the technical field of pulp molding preparation, in particular to an environment-friendly degradable pulp molding product and a preparation method thereof.The preparation method comprises the steps that modified starch is added into deionized water for low-temperature pre-gelatinization, and a pre-gelatinized modified starch solution is obtained; mixing the pre-gelatinized modified starch solution with paper pulp fibers, and performing deep gelatinization to obtain starch-coated fiber slurry; adding a bio-based cross-linking agent into deionized water, and stirring to obtain a bio-based cross-linking agent solution; dropwise adding the bio-based cross-linking agent solution into the starch-coated fiber slurry in a pulse manner, stirring, and carrying out ultrasonic treatment to obtain composite paper pulp; adding a waterproof agent into the composite paper pulp, and stirring to obtain hydrophobic modified paper pulp; and the hydrophobic modified paper pulp is poured into forming equipment to be subjected to segmented pre-hot-pressing forming treatment and then put into steeping liquor to be steeped, then hot-pressing drying is conducted, and a paper pulp molded product is obtained. According to the preparation method, the surface strength and the internal binding force of the product are enhanced through the synergistic effect of the modified starch and the bio-based cross-linking agent.

The invention provides a composite metal catalyst and application thereof in biological combined light treatment paper pulp bleaching. The method comprises the following steps: dividing and brooming cooked paper pulp fibers by adopting biological pretreatment, and then carrying out illumination bleaching under simulated sunlight irradiation by adopting a metal photocatalyst (ZnO, ZFO, ZAO, ZMO and the like). According to the mild treatment method, the whiteness of the paper pulp is improved, and meanwhile it is guaranteed that fibers are not damaged. Compared with traditional chemical bleaching, biological combined light treatment bleaching has the advantages that the content of pollutants in wastewater is greatly reduced, meanwhile, reacted metal oxides can be recycled, and the combined treatment method can be used as a novel paper pulp fiber bleaching mode.