518 results about "Coated paper" patented technology

The invention discloses a degradable PHA / PU composite water-based barrier coating and a coated paper product, and belongs to the field of biodegradable polymer coatings. The coating composition comprises a high proportion of polyhydroxyalkanoates as a barrier phase and a bio-based polyurethane as a toughening and heat sealing phase. The key innovation lies in that the cooperation of rigid barrier and flexible functions is realized by accurately regulating and controlling the ratio of two phases and adopting bio-based crosslinking, and the problem that the barrier property, the heat sealability and the flexibility of a traditional single material are difficult to consider at the same time is solved under the condition of low coating amount. The invention provides a full-life-cycle green packaging solution, aims to replace a polyethylene spraying film and a fluorine-containing coating, and has a remarkable application value in the field of food packaging.

The invention discloses a bio-based PHA oil-resistant and moisture-permeable coating for hamburger paper, coated paper and a preparation method, and belongs to the technical field of bio-based high polymer materials and paper-based food packaging. The coating is a PHA aqueous dispersion, and mainly comprises a semi-crystalline matrix PHA and a low-crystallinity or amorphous toughening PHA. The core of the coating is that after the coating is dried to form a film, a functional gradient structure can be spontaneously formed in the thickness direction of the coating: an interface layer close to a paper base is rich in toughening PHA so as to enhance toughness and adhesive force; and the surface layer of the coating is rich in matrix PHA so as to maximize the oil resistance. By means of the functional gradient structural design, the packaging material integrates oil resistance, moisture permeability and flexibility of the packaging material, has the degradable environment-friendly characteristic and is suitable for packaging high-grease food.

The application discloses degradable PHA / PU composite water-based barrier coating and coated paper products, and belongs to the field of biodegradable polymer coating. The coating composition contains a high proportion of polyhydroxyalkanoate as a barrier phase and a bio-based polyurethane as a toughening and heat-sealing phase. The key innovation is that by precisely controlling the ratio of the two phases and using bio-based cross-linking, the synergy of rigid barrier and flexible function is achieved, and the problem that the barrier property, heat-sealing property and flexibility of traditional single material are difficult to balance is solved at low coating amount. The application provides a full life cycle green packaging solution, which aims to replace polyethylene shower film and fluorine-containing coating, and has significant application value in the field of food packaging.

The invention relates to a coated paper film thickness measuring device, and relates to the technical field of film thickness measurement, the coated paper film thickness measuring device comprises a workbench, two side plates, four mounting seats and two back plates, the two side plates are vertically fixed on the left side and the right side of the upper surface of the workbench, and every two of the four mounting seats form a group; the two groups of mounting seats are respectively fixed with the upper surface of the workbench and the top ends of the two side plates, the two back plates are both located at the rear side of the workbench and are fixed with the ground, and the mounting seats are provided with thickness measuring mechanisms for measuring the thickness of a coated paper film. According to the coated paper film thickness measuring device, the horizontal position of the photoelectric detector can be accurately controlled through the linear module, automatic alignment of the photoelectric detector on the movable plate is achieved through the laser transmitter and the laser receiver, and the moving distance of the movable plate is monitored in real time through the photoelectric displacement sensor; therefore, under the cooperation of the laser transmitter and the laser receiver with the photoelectric displacement sensor, the two photoelectric detectors are always kept in high-precision alignment.

The invention relates to the field of packaging materials, and discloses low-temperature heat-sealing water-based coated paper and a preparation method and application thereof.The water-based coated paper comprises a base paper layer and a water-based coating, and the water-based coating comprises water-based ethylene-acrylic acid copolymer emulsion, modified nano-silica, a coalescing agent and water; a cardanol derivative is introduced into the water-based ethylene-acrylic acid copolymer emulsion as a functional component; the cardanol derivative is prepared by reacting epoxidized cardanol with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and then grafting with acryloyl chloride. The preparation method comprises the following steps: reacting epoxidized cardanol with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; the modified nano silicon dioxide is prepared by mixing aminated nano silicon dioxide and chitosan and adding a cross-linking agent prepared by grafting phytic acid and ethylene glycol diglycidyl ether. The water-based coating paper prepared by the invention overcomes the defects that the existing BOPP film is not environment-friendly, and the conventional coating paper is high in heat sealing temperature and easy to stick; meanwhile, good mechanical properties, water resistance and flame retardance are achieved.

The present invention relates to a composition comprising an aqueous dispersion of biodegradable polymer particles, a method of preparing the composition, and a method of preparing a coated substrate comprising the composition. The composition is useful as a coating applied to a substrate, particularly a paper substrate. The coated paper is useful as a single layered barrier coated paper or paperboard.

The invention belongs to the technical field of coated paper, and particularly relates to a coated paper humidifying water recycling device which comprises an operation box, an opening communicated with the outside is formed in the top of the operation box, a box cover matched with the opening is arranged at the top of the operation box, and a first recycling body is connected to the box cover. A first recycling main body is arranged on the bottom wall of the operation box, a second recycling main body is arranged on the bottom wall of the operation box, the first recycling main body and the second recycling main body are arranged in a matched mode, a horizontally-arranged operation frame is arranged in the operation box, two symmetrically-arranged first supporting plates are fixedly connected to the operation frame, and two symmetrically-arranged baffles are connected to the inner wall of the operation box in a clamped mode; and the two baffles are matched with the operation frame. By means of the device, coated paper can be evenly humidified, the humidified coated paper can be dried in time, it is avoided that the coated paper is mildewed or bred with bacteria due to the fact that the coated paper is placed in a humid environment for a long time, and water used in the humidifying process of the coated paper can be effectively recycled.

An object of the present invention is to provide a coated paper that includes a coating layer containing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) with few coating defects. As a solution, the present invention provides a coated paper including a coating layer containing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and an adhesive, on at least one side of a paper substrate. A solid content weight ratio of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) to the adhesive in the coating layer is 99.9 / 0.1 to 60.0 / 40.0.

The present invention relates to a composition comprising an aqueous dispersion of biodegradable polymer particles, a method of preparing the composition, and a method of preparing a coated substrate comprising the composition. The composition is useful as a coating applied to a substrate, particularly a paper substrate. The coated paper is useful as a single layered barrier coated paper or paperboard.

This invention discloses a bio-based PHA oil-blocking and moisture-permeable coating for hamburger paper, the coated paper, and its preparation method, belonging to the fields of bio-based polymer materials and paper-based food packaging technology. The coating is an aqueous dispersion of PHA, mainly comprising semi-crystalline matrix PHA and low-crystallinity or amorphous toughening PHA. Its core feature is that after the coating dries and forms a film, it spontaneously forms a functional gradient structure along the coating thickness direction: the interfacial layer near the paper substrate is rich in toughening PHA to enhance toughness and adhesion; while the surface layer is rich in matrix PHA to maximize oil-blocking performance. Through this functional gradient structure design, this invention balances the oil-blocking, moisture-permeable, and flexible properties of the packaging material, and possesses biodegradable environmental characteristics, making it suitable for high-oil food packaging.

The utility model relates to the technical field of carton structures, in particular to a waterproof and moistureproof coating carton structure, which comprises a carton body and is characterized in that at least two pairs of oppositely arranged double-layer folding cover plates are arranged at the top of the carton body, soft sealing strips are arranged on the long edges of the periphery of the top of the carton body, a moistureproof lining partition plate is arranged in the carton body, and the waterproof and moistureproof coating carton structure is arranged in the carton body. According to the utility model, a multi-layer structure is adopted to realize omnibearing water resistance and moisture resistance, the surface of the box body is coated with a polyurethane waterproof coating, and the top of the box body is provided with a double-layer folding cover plate and a sealing strip to reinforce sealing; honeycomb PP plastic partition plates are arranged inside to achieve dry and wet isolation. The bottom adopts a waterproof base matched with an arc-shaped diversion trench to discharge accumulated water; a disposable humidity sensing label is arranged to monitor humidity in real time; the cover plate is formed by compounding craft paper and PE coated paper, so that the cover plate is high in strength and moisture-proof; the handle holes are provided with double-layer reinforcing ribs to improve the bearing capacity. The structure integrates waterproof, moisture-proof and load-bearing functions and the like, and meets the use requirements of complex environments.

The invention relates to the technical field of functional paper production, in particular to a pressing and flat pasting composite process of skin-touch surface polymer coated paper, which comprises the following steps: pretreating a base material through low-temperature plasma to form a nano groove; the preparation method comprises the following steps: preparing a bottom coating solution containing sulfydryl modified polyurethane and other components, a middle coating layer containing a carbon nanotube forest and a surface coating solution containing a fluorosilicone block copolymer, and sequentially coating, drying and curing; the coated paper and the base material treated by the silicon dioxide transition layer are compounded after being subjected to vacuum hot pressing and steam treatment, and then are subjected to ultraviolet ozone treatment, so that the comprehensive performance is improved. According to the process, by innovating a coating formula and a compounding technology, the wear resistance, pollution resistance and touch performance of the coated paper are remarkably improved, and the functions of antibiosis, temperature sensing adjustment and the like are achieved; the gloss is adjustable, the adhesive force is high, the VOCs emission is low, the environmental protection property is good, and the multi-element requirements of the high-end market are met.

To provide process paper that can prevent evaporation of volatile ingredients during storage or transportation.SOLUTION: Process paper has barrier-coated paper and a release agent layer on at least one surface of the barrier-coated paper, wherein the barrier-coated paper comprises a paper substrate and a gas barrier coating layer on at least one surface, and the paper substrate has a thickness of 50 μm or more and 200 μm or less, a density of 0.5 g / cm3 or more and 1.1 g / cm3 or less, and a dry shrinkage ratio in the CD direction of 0.6% or less.SELECTED DRAWING: None

The present disclosure provides a coated paperboard comprising a paperboard substrate and a coating layer wherein: the coating layer comprises a pigment mixture and a binder in a dry weight ratio within the range of from 100:14 to 100:25; the pigment mixture comprises a calcium carbonate pigment and a clay pigment in a dry weight ratio within the range of from 98:2 to 92:8; and the calcium carbonate pigment has a particle size distribution (wt. %<2 μm) within the range of from 75 to 95.

The utility model relates to the field of full-automatic bag making equipment, in particular to a puncturing and cutting device of an environment-friendly film-coated paper bag processing production line and a production line, which comprise adjusting devices, gears, a roll shaft and puncturing and cutting knives, and are characterized in that two groups of adjusting devices are arranged and are respectively positioned on two sides of the roll shaft, and each adjusting device comprises a rotating wheel, a fixed block, an adjusting block and a screw rod, the adjusting device is installed on a film-coated paper bag processing production line through a fixing block, a screw rod is arranged on the fixing block in a penetrating mode, the upper end of the screw rod is connected with a rotating wheel, the lower end of the screw rod is connected with adjusting blocks, and the two ends of the roller shaft are connected with the two adjusting blocks respectively. According to the paper bag production equipment, single paper bags can be produced, continuous paper bags can also be produced, the continuous paper bags can be torn off one by one during use, and various requirements of customers are met.

The invention discloses nano cellulose with high lignin content, a preparation method thereof and application of a barrier coating. The preparation method comprises the following steps: mixing a lignocellulose raw material with dilute sulphuric acid for acid pretreatment, and selectively depolymerizing hemicellulose to obtain lignin-rich residues of which the relative content of lignin is higher than that of the raw material; and carrying out mechanical nano fibrillation treatment to obtain the high-lignin-content nano cellulose with the lignin content of 29-60%. The prepared nano cellulose with high lignin content has excellent thermal stability, hydrophobicity and organic compatibility. The surface of paper is coated with the coating material, after hot pressing treatment, the Cobb value of the coated paper is as low as 3.3 g / m < 2 >, the water vapor permeability is only 12.1 g / (m < 2 >. D), grease permeation can be completely blocked, and the coating material has wide application prospects in the field of food packaging.

The invention discloses a paper composite filter material for reducing hydrocyanic acid and crotonaldehyde and a preparation method and application thereof, and the preparation method comprises the following steps: adding a gelator into a solvent to form a gelator solution; transferring the gelator solution into a liquid storage tank of an intaglio printing device, and printing and coating the gelator solution in the liquid storage tank onto a paper base material by using an anilox roller; the coated paper base material is conveyed to a low-temperature tunnel, so that nanofibers of a three-dimensional network structure are formed inside and on the surface of the paper base material in a self-assembly mode; and transferring the paper base material subjected to low-temperature treatment to a drying cylinder, and drying to obtain the paper composite filter material. According to the prepared paper composite filter material, the specific surface area in contact with smoke can be increased, the paper composite filter material can make full contact with the smoke in the process that the smoke passes through a filter stick, the interception capacity of the paper filter stick on hydrocyanic acid and crotonaldehyde in mainstream smoke of cigarettes is improved through amino and carboxyl groups on the surfaces of the nanofibers, and the sensory quality of the cigarettes with the paper filter stick is improved.

The invention discloses a preparation method and application of a repulpable gallic acid-based waterproof and oil-proof agent, and belongs to the technical field of bio-based oil-proof hydrophobic paper surface coatings. The preparation method comprises the following steps: by taking alkyl gallate and epoxy chloropropane as raw materials, preparing alkyl gallate epoxy through epoxidation reaction; and uniformly mixing the alkyl gallate epoxy resin with an acid anhydride / phenol compound to obtain the alkyl gallate epoxy resin series waterproof and oil-proof agent. The structure of the bio-based waterproof and oil-proof agent prepared by the invention contains groups such as a non-polar long alkyl chain, an epoxy group and an amino group, a compact cross-linked coating can be formed on the surface and the interior of paper, and gaps between paper cellulose are filled, so that permeation of oil, water and gas is blocked, meanwhile, the adhesive force between the coating and the paper is increased, and the waterproof and oil-proof effects are improved. The fibers are more tightly combined together; non-polar long alkyl chains and benzene ring groups in the structure can endow the paper with excellent oil-proof, hydrophobic and mechanical properties, and flexible chain segments (alkyl carbon chains) with different lengths are introduced to adjust the flexibility of the coating, so that the flexibility and tensile strength of the paper can be effectively adjusted; the coating paper can be recycled and reused in an alcoholysis mode. The raw materials are easy to obtain and renewable, paper can be re-pulped after being coated, and the paper has the potential of replacing plastic packaging and meets the performance requirements of paper packaging on specific scenes such as water resistance and oil resistance.

The present disclosure relates to a coated paper. The coated paper includes a cellulosic layer and at least two coating layers on one side of the paper. The first coating applied to the paper is a barrier coating that can be made from a plant-or animal-derived component, which is preferably water-soluble or water-dispersible, more preferably water-soluble. In another aspect, the second coating may be a heat sealable coating. The coated paper is particularly suitable for use in the construction of packages.

The invention discloses biodegradable coated paper and a preparation method thereof, and relates to the technical field of polymer materials. The coated paper comprises a polylactic acid compound, wherein the polylactic acid compound comprises the following components in percentage by weight: 2-40% of long-chain branched polylactic acid containing ZnO nanoparticles and 60-98% of polylactic resin. According to the biodegradable coated paper and the preparation method thereof provided by the invention, through introduction of ZnO nanoparticles, physical crosslinking points and nucleating points in a polylactic acid compound system are increased, and the mechanical property, crystallization property, hot water resistance and oil resistance of PLA can be remarkably improved, so that the prepared coated paper has good antibacterial property and excellent comprehensive performance.

The invention relates to the technical field of paper coating defect detection, and discloses a paper coating defect classification method and system based on infrared image recognition, and the method comprises the steps: dividing the surface of coated paper into a plurality of detection regions; a multi-agent distribution collaborative optimization algorithm is utilized, and according to detection resources and progress, detection tasks are distributed and sorted, so that an optimized partition detection execution sequence is obtained; based on a coupled vibration modal feature extraction algorithm and a convolutional neural network model, under the guidance of a partition detection execution sequence, feature extraction is performed on the original infrared image of each partition, and a multi-dimensional partition feature set containing infrared image features and aerodynamic modal features is obtained; and respectively inputting the multi-dimensional partition features into different defect classification models, and obtaining a final coated paper defect classification result of each partition in a weighted voting mode. According to the invention, high-precision defect identification of the coated paper is realized.

The invention relates to the technical field of coated paper production, in particular to coated paper production equipment with an automatic feeding function, the coated paper production equipment comprises first feeding equipment, second feeding equipment and a containing hopper which are arranged on a machine base and used for coated paper production, and anti-blocking equipment which is connected with the first feeding equipment and used for blocking prevention is further arranged on the top side of the machine base; the anti-blocking device comprises a transmission structure, a conveying structure, a gas conveying assembly and a knocking assembly which are arranged above the machine base, the transmission structure is connected with the first feeding device, and the transmission structure and the conveying structure are connected. According to the coated paper production equipment with the automatic feeding function, the knocking assembly periodically knocks the outer wall of the conveying pipe to generate vibration, materials are effectively prevented from being stacked, bridged or blocked in a pipeline, knocking points directly act on the conveying pipe prone to being blocked, the effect is direct and remarkable, meanwhile, the anti-blocking action is completely driven by power of the production equipment, and the production efficiency is improved. Extra manual intervention or external energy is not needed, and the operation complexity and cost are reduced.

The invention relates to the technical field of manufacturing of coated paperboards, in particular to frame paper for cigarettes and a preparation process of the frame paper. The problem that the mechanical property and the barrier property cannot be considered at the same time in the prior art is solved. According to the frame paper for the cigarettes, the bleached hardwood pulp and the softwood pulp are compounded, and the calcium carbonate and the nanocellulose crystals are added to prepare the high-uniformity modified paper base; then, polycaprolactone diol, isophorone diisocyanate, dimethylolpropionic acid and 1, 4-butanediol are subjected to a reaction, aminopropyltriethoxysilane is used for blocking, obtained polyurethane emulsion is mixed with gelatinized starch and flaky kaolin step by step, and the composite coating is prepared; coating double surfaces of the modified paper base with the composite coating, and performing step-by-step drying, hot-pressing shaping and curing to obtain the paper. Through multi-stage cooperation of paper base-coating-process, the frame paper has excellent mechanical properties, high printing stability and high barrier property, and is suitable for the field of high-grade cigarette packaging with strict performance requirements.

The invention relates to a coating for coating paper, said coating comprising chitosan and / or derivatives thereof having an average molecular weight of at most 50 kDa and comprising at least one solvent. The invention also relates to a paper coated with the coating. Finally, the invention relates to a production method and to a package produced with the coated paper.

The invention relates to the technical field of laminated paper production, and provides ultra-low gram weight PLA laminated paper production equipment and a production technology.The ultra-low gram weight PLA laminated paper production equipment comprises a casting machine device and a hot press device, the discharging end of the casting machine device is located on the upper side of the hot press device, a plurality of heating rotating rollers are arranged on the hot press device in a transmission mode, and the heating rotating rollers are located on the upper side of the hot press device; the hot press device is fixedly connected with the trapezoidal groove frame, the heating rollers are rotationally arranged on the trapezoidal groove frame, the discharging end of the casting machine device is located on the side of the heating roller on the middle side, and a material receiving barrel is arranged between the trapezoidal groove frame and the heating roller on the middle side; the material receiving barrel is located on the lower side of the middle side heating rotating roller after rising, and a film guiding assembly is rotationally arranged in the material receiving barrel. According to the technical scheme, the problem that in the prior art, residual polylactic acid raw materials in a casting machine are difficult to discharge is solved.

The invention provides coated paper and a preparation method thereof. The preparation method comprises the following steps: performing corona treatment on the surface of raw paper; extruding a molten resin film to the surface of the raw paper subjected to corona treatment by using an extruder; wherein the anti-sticking smooth master batch is added in the process of melting the resin film by the extruder; and pressing the resin film and the body paper by using a pressure roller and a cooling roller, cooling and shaping. According to the preparation method of the coated paper provided by the embodiment of the invention, the problem of bubbling of the coated paper in the subsequent printing process can be effectively solved by adding the anti-sticking smooth master batch in the process of melting the resin film by the extruder and adjusting and optimizing the coating process parameters and equipment configuration.

The utility model relates to the technical field of paper cups, in particular to a polylactic acid coated paper cup drying machine. The device comprises a mounting bracket, a mounting seat is mounted at the top end of the mounting bracket, a heating cover is jointly mounted between two opposite side walls of the mounting seat, a plurality of heating pipes are mounted at the top end in the heating cover, a conveying belt is rotationally arranged between two opposite inner walls of the mounting seat, and a vibration assembly and an auxiliary assembly are mounted at the bottom of the conveying belt; wherein regular slight vibration is generated through the vibration assembly, so that paper scraps on the paper cups are not prone to adhering to the conveying belt, and glue adhering to the surface of the conveying belt is cleaned and collected through the auxiliary assembly. By means of regular slight vibration generated by the vibration assembly, paper scraps on the paper cups can be effectively prevented from adhering to the conveying belt, pollution to the paper cups caused by the paper scraps is avoided, the surface of the conveying belt is kept clean, the influence of impurity accumulation on heat transfer and the quality of the paper cups is reduced, and meanwhile the maintenance cost of equipment is reduced.

The utility model discloses oil-proof and water-proof coated paper which comprises base paper and a first protective layer, the first protective layer is connected to two ends of the base paper, a reinforcing layer is arranged at one end of the first protective layer, and a second protective layer is arranged at one end of the reinforcing layer. The waterproof performance of the base paper is enhanced through the upper moisture-proof layer and the lower moisture-proof layer, the upper moisture-proof layer is a filter paper water-resistant agent so that the strength and the water-resistant performance of the coated paper can be improved conveniently, the lower moisture-proof layer is composed of the resin and the ultra-low density polyethylene, the resin is generally insoluble in water, and the ultra-low density polyethylene has impact resistance, tear resistance and low water absorption, so that the water-resistant performance of the coated paper is improved. The resin and the extremely low density polyethylene are synthesized, so that the waterproof performance of the base paper is improved, that is, the waterproof performance of the coated paper is improved, the coated paper is prevented from being wetted by water and cannot be used, and the reinforcing layer is made of acetic bacteria and agrobacterium under different conditions.

The present invention discloses a production method of star paper based on silver foil pulping, which relates to the technical field of special paper production. The production method of star paper based on silver foil pulping includes the following steps: Step 1: Prepare the base paper and silver foil slurry required for star paper; Step 2: Feed the base paper into a coater, and the coater coats the silver foil slurry on the base paper and reduces the waste part of the base paper to obtain coated paper; Step 3: Feed the coated paper into an oven for drying. In Step 2, the base paper passes through a fixed roller, and the slurry tank on one side of the fixed roller coats the middle area of the base paper, without coating on both sides. This production method of star paper based on silver foil pulping can coat the base paper twice, and the raw material for the second coating is the excess part of the raw material for the first coating. The transfer component transports the excess slurry from the first coating to the edge, greatly reducing the phenomenon of paper waste.

The invention relates to the technical field of a coating process in pulping and papermaking, in particular to a preparation process of a matte white cardboard, which comprises the following steps: grinding and screening raw ore to obtain calcium carbonate with ultrafine particle size distribution, the viscosity of which is 100-150cps, the particle size of which is less than or equal to 2 mu m distribution of 97-99% and the particle size of which is less than or equal to 1 mu m distribution of 79-80%; mixing 100 parts of calcium carbonate with superfine particle size distribution, 0.2 part of a dispersing agent, 0-0.4 part of sodium carboxymethyl cellulose, 10.5-11 parts of styrene-butadiene latex, 0.2 part of a defoaming agent, 0.2 part of a lubricating agent, 0.3 part of a water-resistant agent, 0.15 part of polyvinyl alcohol and 0.1-0.4 part of a rheological agent to prepare a top coating; conveying the prepared topcoat paint to a paper machine, and coating the paper; and drying and coiling the coated paper. By optimizing and improving the particle size distribution of ground calcium carbonate, the consumption of the china clay is reduced, the coating index, the on-machine operation condition and the physical property and printing effect of paper are improved, the matte effect is realized, meanwhile, the dependence on imported china clay is reduced, and the production cost is reduced.