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210results about "Biocidal agent addition" patented technology

Polyhydroxyalkanoate water-based barrier coating composition and application

The invention discloses a polyhydroxyalkanoate water-based barrier coating composition and application, and belongs to the technical field of packaging materials. The composition takes water as a dispersion medium and comprises polyhydroxyalkanoate, a plasticizer, an emulsifier and an inorganic nano filler. The stable emulsion with the volume average particle size of 400-700nm is prepared under specific proportioning and process conditions. After the emulsion is applied to a paper substrate according to the dry film coating weight of 10-12 g / m, the obtained coating shows good comprehensive performance: the oxygen permeability is not higher than 580 cm / m.d, the water vapor permeability is not higher than 290 g / m.d, and the heat sealing strength at 130 DEG C is not lower than 5.0 N / 15 mm. The biodegradable paper-based packaging film does not contain fluorine compounds, can be completely biodegraded, and provides a technical path for sustainable paper-based packaging.
Owner:DU BAI CHENG NEW MATERIAL TECH (SHANGHAI) CO LTD +3

Antibacterial agent, preparation process and preparation process of antibacterial decorative paper

The invention belongs to the technical field of new materials, and discloses an antibacterial agent, a preparation process and a preparation process of antibacterial decorative paper.The antibacterial agent is prepared from 40-50 parts of tea polyphenol and 20-50 parts of abelmoschus manihot gum. The antibacterial agent prepared by selecting tea polyphenol as a main antibacterial substance is applied to an impregnation process of impregnated bond paper of a veneer artificial board, the veneer artificial board is endowed with spectral antibacterial performance, and compared with chemical synthetic antibacterial agents and metal antibacterial agents, the antibacterial agent has the characteristics of high efficiency, safety, no toxicity and lasting antibacterial property. The antibacterial agent provided by the invention has excellent uniform dispersibility in melamine glue, UV paint and water-based paint, and the original production process of facing artificial boards and wood floors is not changed. According to the test standard of JC / T2039-2010 antibacterial mildew-proof wooden decorative sheet, the antibacterial performance of the product on staphylococcus aureus and escherichia coli can easily reach more than 99.99%, and the antibacterial durability of the product after 5000 times of washing is also more than 99.99%.
Owner:杭州新洋科技有限公司

Bacteriostatic and antiviral bamboo pulp paper-based sanitary isolation bag as well as preparation method and application thereof

The invention discloses a bacteriostatic and antiviral bamboo pulp paper-based sanitary isolation bag as well as a preparation method and application thereof, and belongs to the field of functional paper-based packaging materials. The isolation bag takes bamboo pulp fiber paper as a base material, and the surface of the isolation bag is coated with a water-based polyhydroxyalkanoate functional coating. According to the preparation method, a special polyphenol derivative-chitosan quaternary ammonium salt-nano zinc oxide organic-inorganic hybrid factor is introduced, and the problem of agglomeration of nano particles is effectively solved by utilizing the special bridging effect of polyphenol, so that high-density cation capture and oxidation inactivation sites are constructed on the surface of the coating. Compared with the prior art, the method has the advantages that the method does not need to depend on organic fluorine compounds, and the excellent waterproof and oil-proof barrier effect and the efficient inactivation of viruses can be achieved only through the extremely low coating amount. In addition, the isolation bag has unique environmental chemical responsiveness, can be efficiently dissociated under the alkaline condition to facilitate repulping recovery, can be completely biodegraded in the natural environment, and perfectly considers the requirements of biological safety protection and green environmental protection.
Owner:DU BAI CHENG NEW MATERIAL TECH (SHANGHAI) CO LTD +3

Double anti-mite fruit cultivating bag paper and preparation method thereof

The invention relates to the technical field of agricultural paper, in particular to double anti-mite fruit cultivating bag paper and a preparation method thereof. The preparation method comprises the following steps: pulping: respectively pulping natural-color bamboo pulp and natural-color softwood pulp, then mixing, adding water, and uniformly mixing to obtain pulp; papermaking: sequentially adding iron oxide yellow, aluminum sulfate, rosin size and a wet strength agent into the pulp, adding water for dilution, and drying after papermaking to obtain fruit cultivating bag body paper; sizing: taking oxidized cassava starch, adding water, preparing starch slurry, heating, continuously stirring until the starch is completely gelatinized, taking starch gelatinized liquid, adding neem oil, putting into a high-speed homogenizing emulsifying machine, emulsifying to obtain neem oil anti-mite emulsion, uniformly mixing the neem oil anti-mite emulsion with wax emulsion to obtain anti-mite glue liquid, immersing the fruit cultivating bag body paper into the anti-mite glue liquid, and drying to obtain the fruit cultivating bag. And taking out and drying to obtain the double anti-mite fruit cultivating bag paper. The composite material has physical barrier and long-acting anti-mite functions, and the risk of insect attack invasion is greatly reduced.
Owner:QINGDAO JIEZHONG NEW MATERIAL TECHNOLOGY CO LTD

Straw fiber-based antibacterial mulching film with temperature and humidity response performance and preparation method

The invention discloses a straw fiber-based antibacterial mulching film with temperature and humidity response performance and a preparation method, and belongs to the technical field of agricultural mulching films, the straw fiber-based antibacterial mulching film with temperature and humidity response performance comprises a bottom film layer, a slow release layer and a barrier layer in sequence from bottom to top; the slow-release layer is obtained by coating the base film layer with a mixed solution of acetic acid, a bactericide, gelatin and a plasticizer; the barrier layer is obtained by coating palm wax emulsion on the surface of the slow release layer. According to the invention, palm wax, a bactericide (carbendazim), gelatin and a wheat straw fiber-based mulching film are combined to construct the wheat straw fiber-based temperature and humidity response type bacteriostatic mulching film. The straw fiber-based antibacterial mulching film can respond according to the change of environmental temperature and humidity to realize accurate release of pesticides, so that diseases are accurately regulated and controlled.
Owner:NORTHEAST AGRICULTURAL UNIVERSITY

Multifunctional composite fiber reinforced decorative base paper and preparation method thereof

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.
Owner:ZHE JIANG XIA WANG ZHI YE YOU XIAN GONG SI

Preparation method of environment-friendly straw paper with hydrophobic and lip-sticking-free performance

The invention provides a preparation method of environment-friendly straw paper with hydrophobic and lip-sticking-free properties. The preparation method comprises the following steps: respectively pulping bleached softwood pulp and bleached hardwood pulp, and mixing to obtain a fiber mixture; adding a biological wax waterproof system sizing agent into the fiber mixture, or adding the biological wax waterproof system sizing agent and an antibacterial agent, and adding a wet strength agent and an alkyl ketene dimer, and carrying out net forming treatment; the preparation method comprises the following steps: carrying out squeezing dehydration and primary drying treatment on paper pulp subjected to net forming treatment, carrying out surface coating and sizing by adopting a sizing system containing a biological wax waterproof system sizing agent, carrying out secondary drying treatment, and finally sequentially carrying out calendering and coiling to obtain the environment-friendly straw paper. Experiments show that the straw paper disclosed by the invention has the advantages of excellent hydrophobicity, no lip sticking, high strength, high antibacterial property, complete degradability, no toxicity and environment friendliness.
Owner:MUDANJIANG HENGFENG PAPER CO LTD

Medical packaging box and preparation process

The invention discloses a packaging box special for medical treatment, and relates to the field of packaging boxes for medical treatment. The plant fiber composite material is prepared from the following raw materials in parts by weight: 80-95 parts of plant fiber slurry, 3-10 parts of chitosan, 5-15 parts of polylactic acid, 1-5 parts of nano silicon dioxide, 0.5-3 parts of an environment-friendly water repellent agent, 2-8 parts of reinforced fibers, 3-8 parts of a reversible moisture absorption phase change material and 0.1-0.5 part of a degradation indicating pigment. The plant fiber slurry is adopted as a bio-based framework, chitosan microfibers, polylactic acid, nano silicon dioxide, a reversible moisture absorption phase change material and other functional components are innovatively introduced, and an antibacterial trigger layer and degradation indication pigment on the inner surface are matched, so that the packaging box keeps good mechanical strength and structural stability, and meanwhile the packaging box has the advantages that the packaging box is not prone to deformation, and the service life is prolonged. And multiple functions of active on-demand antibiosis, dynamic humidity adjustment, visual degradation tracking and full bio-based degradability are achieved.
Owner:ZHEJIANG DELI PACKAGING CO LTD

Manufacturing process of environment-friendly antibacterial tea filter paper

The invention belongs to the technical field of tea filter paper manufacturing, and particularly relates to a green environment-friendly antibacterial tea filter paper manufacturing process which comprises the following steps: S4, calendaring and processing: calendaring wet paper through a calendaring machine to enable the surface to be smoother, processing according to needs, cutting into filter paper sheets with specific sizes, and cutting the filter paper sheets into filter paper sheets with specific sizes; and S4, the calender comprises a supporting beam used for supporting, a control cabinet is fixedly installed on the upper surface of the supporting beam, a calendering mechanism is arranged on the upper surface of the supporting beam, a shearing mechanism is arranged above the calendering mechanism, and a sorting mechanism is arranged below the calendering mechanism. According to the manufacturing process of the green and environment-friendly antibacterial tea filter paper, a speed reducing motor drives a linkage oblique bevel gear at the lower end to rotate, and then relative rotation of an inner sleeve and an outer sleeve is achieved under two driving oblique bevel gears and a linkage oblique bevel gear at the upper end, so that relative rotation of a connected shearing plate can be achieved, and the filter paper can be clamped and sheared off.
Owner:FUJIAN QUANZHOU YUYUAN TEA CO LTD

Antibacterial and bacteriostatic bamboo-wood fiber-based food material packaging box and preparation method thereof

The invention discloses an antibacterial and bacteriostatic bamboo-wood fiber-based food material packaging box and a preparation method thereof, and relates to the technical field of packaging materials. The packaging box is composed of a paper base layer and an antibacterial coating on the surface of the paper base layer. Wherein the paper base layer is made of mixed paper pulp; the antibacterial coating is obtained by coating the surface of the paper base layer with an antibacterial coating; the antibacterial coating is prepared from the following raw materials in parts by mass: 30 to 40 parts of deionized water, 2 to 2.4 parts of polyvinyl alcohol, 1.2 to 1.5 parts of glycerol, 6.7 to 7.3 parts of antibacterial particles, 0.1 to 0.4 part of rosmarinic acid and 0.5 to 0.8 part of modified silicon dioxide; the antibacterial particles are formed by mesoporous carrier materials loaded with wormwood essential oil. Due to the introduction of components such as the antibacterial particles and the modified silicon dioxide, the long-acting antibacterial, waterproof and fresh-keeping capacities of the bamboo-wood fiber-based food material packaging box are effectively improved. Therefore, the method has a wide application prospect.
Owner:HUNAN LING HI-TECH MATERIALS CO LTD

Preparation method of high-strength water-resistant special functional paperboard

The invention discloses a preparation method of a high-strength water-resistant special functional paperboard, and belongs to the technical field of papermaking, the high-strength water-resistant special functional paperboard sequentially comprises a surface sizing layer, a surface paper layer, a core paper layer, a bottom paper layer and a bottom sizing layer from top to bottom, and the surface paper layer, the core paper layer and the bottom paper layer are made of waste paper pulp. The surface sizing layer and the bottom sizing layer are made of environment-friendly glue, through the surface paper layer, the core paper layer and the bottom paper layer, the functional paper has higher paperboard physical strength and better water resistance, and the functional paper is environmentally friendly, efficient and remarkable in superiority.
Owner:ZHEJIANG JINGXING PAPER

Preparation process of copper-based nano antibacterial coating

The invention discloses a preparation process of a copper-based nano antibacterial coating, aiming at solving the problems that the traditional antibacterial coating has no complete inhibition and decomposition effect on mould due to factors such as simplification of a production process and the like, musty odor is difficult to thoroughly remove, and residual mould spores cause health problems and the like. The reason is that the self morphological structure of the antibacterial material is not uniformly distributed in the coating, and the oxidation degree is insufficient, so that the self bactericidal performance is influenced. According to the invention, a binary homogeneous high-pressure jet crushing and mixing preparation process is adopted, and the particle size of the copper-based nano-antibacterial material is below 300nm after the copper-based nano-antibacterial material is crushed and prepared by a homogeneous high-pressure jet collision process, so that the copper-based nano-antibacterial material is densely and uniformly distributed in the coating, and the effects of fully purifying formaldehyde and thoroughly inhibiting mould are achieved.
Owner:ZHEJIANG HONGJI NEW ENERGY TECHNOLOGY CO LTD

A method for surface antibacterial treatment of cardboard boxes for fruit preservation

ActiveCN118979406BBio-packagingPaper coating
This invention relates to a surface antibacterial method for cardboard boxes used for fruit preservation, belonging to the field of cardboard coating technology. The method involves preparing a base solution, curing and modifying capsules, and treating with a treatment solution to obtain a coating liquid. This coating liquid is then applied to the surface of the cardboard box to obtain a cardboard box with surface antibacterial properties for fruit preservation. Through intermolecular interactions, the connection between the coating and the cardboard box surface is innovatively strengthened, as well as the connection between the antibacterial components and the porous capsules, achieving long-lasting antibacterial effects and resulting in excellent fruit preservation.
Owner:ZHENGYE INT HLDG CO LTD

Process for modifying wood by using high-stability composite nano material

The invention relates to a process for modifying wood through a high-stability composite nano material, and belongs to the technical field of wood modification. The technology for modifying the wood through the high-stability composite nanometer material comprises the following steps that the wood is cleaned and dried, and pretreated wood is obtained; the preparation method comprises the following steps: dissolving a functional monomer, hydroxyl acrylamide and allyl glycidyl ether in absolute ethyl alcohol, adding a titanate coupling agent and an initiator, and stirring and mixing to obtain modified liquid; and the pretreated wood is soaked in the modified liquid for dipping treatment, the wood is taken out, deionized water is sprayed to the surface of the wood, aging and heating heat preservation treatment are conducted, vacuum drying is conducted till the weight is constant, and the wood is obtained. According to the method, a nano titanium dioxide material can be effectively combined with a wood matrix, and meanwhile, the hydrophobicity, the antibacterial property and the compressive strength of the wood are remarkably improved.
Owner:JIANGMEN ZICHUANG INTELLIGENT TECHNOLOGY CO LTD

A method for preparing a zero-VOCs degradable seedling paper

This invention discloses a method for preparing zero-VOCs degradable seedling paper, comprising the following steps: S1, raw material selection: the fiber raw material includes 75-85% cattail and 15-25% reed by mass fraction; S2, the fiber raw material described in S1 is sequentially processed through the following steps: cattail + reed → vertical cooking → closed screening → pulp washing → oxygen delignification → pulp concentration → unbleached chemical straw pulp → storage tower → extruder → high-consistency mill → anti-fouling tank → conical refiner → pulp mixing tank → pulp forming tank → sand removal → screening → wire forming → pressing → pre-drying → surface sizing → post-drying → calendering, to obtain seedling paper that meets the requirements for ecological agricultural paper. The seedling paper obtained by this invention has good air permeability and high dry and wet strength, weather resistance to wind and rain erosion and trampling, can achieve natural microbial degradation in soil, and all raw materials are zero-VOCs degradable and sustainable, making it green, environmentally friendly and harmless to the soil.
Owner:YUEYANG FOREST & PAPER CO LTD

Mildew-proof decorative paper as well as preparation method and application thereof

The invention provides mildew-proof decorative paper as well as a preparation method and application thereof, and relates to the field of mildew-proof decorative paper. The preparation method of the mildew-proof decorative paper comprises the following steps: preparing a core-shell composite particle dispersion liquid, preparing a mildew-proof agent, and mixing and manufacturing paper with pulp. According to the preparation method of the mildew-proof decorative paper, the problem that the whiteness, the opacity, the mechanical strength and the weather resistance of the mildew-proof decorative paper are influenced by directly adding the mildew preventive can be effectively avoided, and the whiteness, the opacity, the mechanical strength and the weather resistance of the mildew-proof decorative paper are effectively improved; and the surface smoothness, the veneer glue penetration grade, the veneer peel strength and the water-resistant and mildew-proof performance of the veneer artificial board prepared from the wood-plastic composite material are further improved.
Owner:SHANDONG XIANHUA NEW MATERIAL TECH CO LTD

Bacterial nanocellulose transparent film, manufacturing method thereof, and packaging material using the same

Provided are a bacterial nanocellulose transparent film, a manufacturing method thereof, and a packaging material including a food packaging material or an electronic product packaging material using the same capable of newly manufacturing a bacterial nanocellulose transparent film with an oxygen barrier property, a moisture barrier property, or a UV barrier property by performing electron beam irradiation and a film process on bacterial cellulose.
Owner:KOREA RES INST OF CHEM TECH

Method for manufacturing a fibrous web

The invention relates to a method for manufacturing a fibrous web, such as web of paper, board, tissue or the like. The method comprises obtaining at least one fibre suspension of lignocellulosic and / or cellulosic fibres and feeding the fibre suspension into an intermediate residence entity, such as pulper, storage tower or broke tower. Fibre suspension, which comprises bacterial endospores, is discharged out of the intermediate residence entity via an outlet after a residence time of at least 2 hours in the intermediate residence entity and after a time delay the fibre suspension is formed into a fibrous web. Bacterial endospores are sensitised by adding a germinant surfactant, which comprises a primary or secondary ammonium head group and a linear unsubstituted C12-alkyl tail, to the fibre suspension at an addition point, which is located at the lower part of the intermediate residence entity or after the outlet of the intermediate residence entity, but before the formation of the fibrous web.
Owner:KEMIRA OY

Degradable paper pulp packaging product suitable for tomato transportation and storage and preparation method of degradable paper pulp packaging product

The invention discloses a degradable paper pulp packaging product suitable for tomato transportation and storage and a preparation method thereof.The method comprises the following steps that S1, functional auxiliaries are added into pulp and stirred and mixed, then modified polyamide-epichlorohydrin resin is added, bagasse is added and stirred and mixed, uniform stirring is performed, the pulp is mixed, and a mixture is obtained; the modified polyamide-epichlorohydrin resin is prepared by mixing polyamide-epichlorohydrin resin and cationic starch; s2, the mixed slurry is subjected to vacuum adsorption, dehydration and forming, and a wet blank is obtained; s3, the wet blank is heated, dried and shaped, and a packaged semi-finished product is obtained; s4, sterilizing the packaged semi-finished product prepared in the step S3 to obtain a bagasse paper pulp packaged crude product; and S5, the packaging crude product prepared in the step S4 is subjected to a film coating procedure, an antibacterial coating is coated, and the bagasse paper pulp packaging product suitable for tomato packaging is obtained.
Owner:BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES

Mildew-proof agent, preparation process and preparation method of mildew-proof bond paper

The invention relates to a mildewproof agent, a preparation process and a preparation method of mildewproof bond paper, and belongs to the technical field of mildewproof agent preparation. According to the mildew preventive disclosed by the invention, composite zirconium phosphate is taken as a carrier, mould permeation is physically blocked through a layered structure, and zinc ions and epsilon-polylysine are slowly released, so that a multi-dimensional long-acting antibacterial effect is realized; the styrene-acrylic emulsion base material and the silane coupling agent construct a brick-mud interpenetrating network structure, so that the oxygen permeability of the coating is reduced, and mould permeation is further prevented. According to the preparation method of the mildew-proof bond paper, N2 / CF4 mixed plasma treatment is adopted, so that the surface energy of the paper is improved, meanwhile, a fluorocarbon group and a silane coupling agent form a covalent bond, the interface bonding strength is improved, and uniform permeation of a mildew-proof agent is promoted; according to the gradient drying process, through three-stage temperature control, the internal stress of the coating is reduced, and the silane crosslinking degree and the water resistance are improved. Through collaborative innovation of a mildew inhibitor formula and a preparation method, the mildew inhibition rate of the mildew inhibitor is enhanced, and meanwhile, the loading efficiency of the mildew inhibitor is improved compared with that of a traditional process.
Owner:杭州新洋科技有限公司

High-strength antibacterial decorative paper and preparation method thereof

The invention relates to the technical field of decorative paper, and discloses high-strength antibacterial decorative paper and a preparation method thereof. The preparation method comprises the following steps: mixing and reacting a waterborne polyurethane prepolymer with antibacterial functional polyether to obtain a waterborne polyurethane-polyurea prepolymer; carrying out an imidazole end-capping reaction on the waterborne polyurethane-polyurea prepolymer, and neutralizing and emulsifying to obtain an antibacterial impregnation liquid; and dipping decorative raw paper in the antibacterial dipping liquid, taking out the decorative raw paper, and drying the decorative raw paper to obtain the high-strength antibacterial decorative paper. The decorative paper is high in strength, excellent in wear resistance and excellent in antibacterial property, and a veneer prepared from the decorative paper as a veneer material is high in bonding strength.
Owner:ANHUI RONGCHANG NEW MATERIAL TECH CO LTD

Resin-containing composition with antimicrobial, especially biocidal, properties for surface coating of paper or wood-based panels

ActiveCN116034141BBiocideSpecial paper
This invention relates to a composition having antibacterial properties, particularly biocidal properties, for use as a surface coating of paper layers or material boards, wherein the composition comprises: at least one formaldehyde resin, particularly melamine-formaldehyde resin; at least one compound of general formula (I), R 1 SiX3(I), where X is an alkoxy group and R 1 It is an organic residue selected from C1-C10 alkyl groups, wherein the C1-C10 alkyl group can be interrupted by -O- or -NH-, and wherein R 1 The composition comprises at least one functional group Q1, said functional group being selected from amino groups, methacrylic acid groups, methacrylic acid oxy groups, vinyl groups, and epoxy groups; at least one other compound of general formula (II), SiX4(II), wherein X is an alkoxy group; and at least one antibacterial active substance, particularly at least one biocidal agent. The invention also relates to the use of this composition and to paper layers or engineered wood panels having this composition.
Owner:SWISS KRONO TEC AG

A composite antibacterial and antiviral plate and a preparation method of a composite antibacterial and antiviral agent

The application relates to the technical field of antibacterial and antiviral plates, and discloses a composite antibacterial and antiviral plate and a composite antibacterial and antiviral agent, which comprises two substrates, the two substrates are provided with balance layers at one end, adhesive agents are arranged between the two substrates and the two balance layers, and antibacterial and antiviral impregnated decorative papers are arranged between the two balance layers. The composite antibacterial and antiviral plate is formed by combining various antibacterial and antiviral technologies to form a novel composite antibacterial and antiviral agent. Compared with general antibacterial or antiviral plates, the antibacterial and antiviral plate has a synergistic effect, and the performance of single antibacterial or antiviral function is increased by 30%. Meanwhile, the antibacterial and antiviral components are more uniformly dispersed in the system through synergistic effect and porous nano structure, and the consumption of effective components is reduced through ion replacement effect, so that the effect of slow release of effective components is achieved, and the antibacterial and antiviral service life is prolonged.
Owner:DEHUA TB NEW DECORATION MATERIAL CO LTD

Method for producing a long-life fibrous substrate and fibrous substrate

PendingEP4585748A1Special paperPaper coating
A method (100) for increasing the longevity of a fiber substrate (10), for example for banknotes, is disclosed. The method (100) comprises providing (110) an untreated fiber substrate (10), impregnating (120) the untreated fiber substrate (10) with at least one soft polymer (21) having a relatively low glass transition temperature (Tg) to obtain an impregnated fiber substrate (10), drying (130) the impregnated fiber substrate (10), and coating (140) the impregnated and dried fiber substrate (10) with at least one hard polymer (41) having a higher glass transition temperature (Tg) relative to the soft polymer (21) to obtain a circulation-stable fiber substrate (10).A fiber substrate (10) is further disclosed, comprising a substrate core (11) having a core impregnation with a soft polymer (12) having a relatively low glass transition temperature (Tg) and having a surface coating (12) comprising a hard polymer (41) having a higher glass transition temperature (Tg).
Owner:GIESECKE & DEVRIENT CURRENCY TECHNOLOGY GMBH

Preparation method of composite paper antibacterial film

The invention relates to the technical field of composite paper antibacterial film preparation, and mainly relates to a composite paper antibacterial film preparation method, which comprises: S1, raw material preparation: preparing kraft paper, an antibacterial agent and a dispersant; s2, preparing an antibacterial layer; s3, compounding is carried out; s4, trimming is conducted, specifically, the composite film roll is conveyed to pass through trimming equipment, the composite film roll is cut into the specified size through the trimming equipment, and edge flaws are removed; in the preparation process of the composite paper antibacterial film, the adjusting part in the trimming equipment drives the two cutting parts to swing, so that the two cutting parts can conduct trimming treatment on paper in turn, meanwhile, the cleaning part is used for cleaning the lifted cutting parts, continuous trimming is avoided when glue is attached, the production efficiency is improved, and the production cost is reduced. Therefore, burrs and other flaws are generated during trimming, and the trimming quality is improved.
Owner:SUQIAN GETTEL PLASTIC IND

Biocide control in paper making

PendingEP4555144A1Waste product additionPaper recycling
A method for controlling paper making includes monitoring (302) a surface level of a fibrous suspension in a storage, and identifying (303) that the surface level has decreased so that at least one emptying criterion is met and thereafter identifying that the surface level has increased so that at least one refilling criterion is met, and responsively to the identifying that the surface level has increased so that the at least one refilling criterion is met, starting to dose a biocide agent into the fibrous suspension entering the storage. A corresponding apparatus and computer program are disclosed.
Owner:KEMIRA OY

Bacterial cellulose sheet and its preparation method and application

The application provides a bacterial cellulose sheet and a preparation method and application thereof, and the preparation method comprises the following steps: modifying bacterial cellulose homogenate by using a modifier to obtain modified bacterial cellulose homogenate; mixing the modified bacterial cellulose homogenate with fiber pulp to obtain on-loom pulp, and forming by papermaking to obtain the bacterial cellulose sheet; and the dry weight content of bacterial cellulose in the bacterial cellulose sheet is 30-90%. The bacterial cellulose sheet is prepared by regulating the particle size and content of bacterial cellulose, the performance indexes of the compounded fiber pulp and the parameters of the forming net material, so that the problem of poor water filtration and strong adhesion of the compounded pulp in the papermaking process and the problem of inability to release paper are solved, the papermaking process is suitable for continuous production equipment such as a paper machine, and the continuous and industrial production of the bacterial cellulose sheet is realized.
Owner:BAODING BANKNOTE PAPER CO LTD +1

Process for manufacturing a fibre web

The present invention relates to a process for manufacturing a fibre web, such as paper, board, tissue or the like. In the process bleached cellulose-containing fibres are suspended into process water in order to prepare a fibre stock, which comprises residual hydrogen peroxide. The process comprises at least one pulp storage tower through which the fibre stock is transferred before it is formed into a fibrous web and dried. Zinc ions are introduced to the fibre stock or one of its constituents to maintain the amount of residual hydrogen peroxide in the fibre stock at or above a predetermined threshold level after at least one pulp storage tower.
Owner:KEMIRA OY

Biocide management in papermaking

PendingJP2025524584A5Waste product additionPaper recycling
A method for controlling papermaking, comprising: monitoring the liquid level of a fibrous suspension in a reservoir (302); identifying that the liquid level has dropped so as to meet at least one empty criterion (303), and then identifying that the liquid level has risen so as to meet at least one replenishment criterion; and starting to administer a biocide to the fibrous suspension flowing into the reservoir in response to identifying that the liquid level has risen so as to meet at least one replenishment criterion. A corresponding device and computer program are also disclosed.
Owner:KEMIRA OY

Preparation method of thermoplastic melamine glue impregnated decorative paper

The invention relates to the technical field of decorative paper, in particular to a preparation method of thermoplastic melamine glue impregnated decorative paper, which comprises the following steps: step (1) pretreatment of base paper; (2) preparing thermoplastic melamine glue; and (3) gum dipping: dipping the pretreated base paper with thermoplastic melamine gum, drying, cooling, shearing, stacking, paving and hot-pressing to obtain the decorative paper dipped with the thermoplastic melamine gum. According to the scheme, a compound containing a flexible chain segment is introduced to a melamine molecule, and the ductility is improved by accurately controlling conditions such as the temperature, the pH value and the reaction time of a synthetic reaction; the modified nano silicon dioxide dispersion liquid is coated on the surface of the base paper, and the modified nano silicon dioxide is embedded in the base paper by utilizing gaps of the base paper, so that the interface bonding force between the filler and the resin is improved, the filler can play a better role, and the overall performance of the resin adhesive is improved.
Owner:CHENGDU DILONG NEW MATERIAL CO LTD