392 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 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.

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.

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 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 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 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 present invention relates to a method for coating a paper substrate comprising: i) providing a paper substrate; ii) applying to the paper substrate an aqueous barrier coating composition comprising: a) from 10 to 50 wt% of a modified cutin extract (as dry matter), wherein said modified cutin extract is obtained by thermal treatment of 5 a raw cutin extract at a temperature comprised between 40 and 120 °C; b) at least one divalent or trivalent fatty acid metal salt, wherein the weight ratio, based on the dry content, of the modified cutin extract to the at least one divalent or trivalent fatty acid metal salt is from 10:1 to 1.1:1.

The invention provides matte coated paper, modified calcium carbonate and a preparation method. The preparation method of the modified calcium carbonate comprises the following steps: drying a certain amount of light calcium carbonate raw material in a drying oven; carrying out dry pre-modification on the dried light calcium carbonate by utilizing a silane coupling agent; carrying out wet deep modification on the light calcium carbonate subjected to dry pre-modification by using stearic acid; filtering the modified suspension, washing a filter cake, and drying; and carrying out superfine grinding on the dried blocky material to obtain the modified calcium carbonate powder. According to the preparation method of the modified calcium carbonate provided by the embodiment of the invention, the prepared modified calcium carbonate powder can improve the absorptivity and retentivity of calcium carbonate to ink, so that matte coated paper has better ink absorptivity and good ink drying performance, and the printing efficiency is further improved.

The present application relates to the technical field of production of coated paper, and discloses a coated paper corona treatment device, which comprises a corona device, the side of the corona device is fixed with two side plates, a plurality of guide rollers are rotationally arranged between the two side plates, an electrostatic discharge assembly is arranged between the two side plates, the electrostatic discharge assembly is composed of a wiping structure and a water storage box, the wiping structure comprises water-absorbing cloth, the water storage box accumulates water, the bottom surface of the water-absorbing cloth is immersed in the water, and a plurality of overflow holes are formed in one side of the water storage box. The coated paper treated by the corona device is wiped by the wet water-absorbing cloth, the surface charge is quickly dispersed through the micro-conductive layer formed by water molecules, meanwhile, the heterocharge is neutralized by the active adsorption of the polar molecules, the interference of static electricity accumulation on printing and compounding processes is eliminated, in addition, the dust particles adsorbed on the surface of the coated paper are physically removed by wiping, the secondary pollution caused by electrostatic adsorption is avoided, and the surface cleanliness of the product is improved.

To provide coated paper which can be used as a practical cushioning material, and to provide a paper-made cushioning material comprising the coated paper.SOLUTION: The paper-made cushioning material comprises coated papers having an under layer and a top layer in this order on a paper base material, wherein both the under layer and the top layer contain resins, at least one of the under layer and the top layer has a Young modulus of 300MPa or less, and the Oken type air permeation resistance as a whole is 100,000 seconds or more.SELECTED DRAWING: None

The application discloses a polylactic acid / calcium carbonate papermaking coating composite pigment and a preparation method and application thereof, and belongs to the technical field of papermaking. In the application, under high-speed stirring at pH 7.6-7.8, a carbonate aqueous solution is added dropwise into a calcium salt solution, and porous amorphous calcium carbonate particles are prepared through reaction; the porous amorphous calcium carbonate particles are added into polylactic acid, the polylactic acid fills the internal pores of the porous amorphous calcium carbonate particles and coats the particles, and the polylactic acid / calcium carbonate papermaking coating composite pigment is obtained. The polylactic acid / calcium carbonate papermaking coating composite pigment prepared in the application has uniform particle size distribution, improved light scattering capacity, low coating viscosity, good coating performance, high surface strength, smoothness, whiteness and opacity of coated paper; the polylactic acid is biodegradable and environment-friendly, and the mechanical strength, wear resistance and thermal stability of the coating are improved.

The present invention relates to a barrier red algae fiber, a method for preparing the same, and a barrier coated paper and a barrier sheet comprising the same. The barrier coated paper according to the present invention not only has better oxygen barrier properties and dehydration properties during a coating process than conventional wood derived nanocellulose, but is also environmentally friendly because it has biodegradable properties.

The utility model relates to double adhesive paper production technical field, concretely for a kind of coating machine for double adhesive paper production, including base, coating machine body and double adhesive paper body, coating machine body is fixedly connected in the upper surface of base, the upper surface of base is fixedly connected with symmetrical fixed block, the upper surface of fixed block is fixedly connected with support frame, the inner wall of support frame is fixedly connected with electric push rod.Compared with prior art, the patent is set by electric push rod, lifting plate, fixed plate and dust suction component, the cleaning pad on lifting plate is contacted to double adhesive paper body by electric push rod driving lifting plate to move, then the dust on double adhesive paper body is cleaned by moving double adhesive paper body, dust is sucked into dust collection box inside by dust suction head and dust collector, improve the cleaning effect of double adhesive paper body, the movement of lifting plate can be controlled in millimeter level by using electric push rod, different thickness double adhesive paper body can be cleaned, and the technical problem that double adhesive paper body is not damaged.

The application relates to the field of vacuum aluminum-plated paper processing and specifically discloses a dry-wet compounding process for vacuum aluminum-plated paper. The dry-wet compounding process for vacuum aluminum-plated paper comprises the following preparation steps: S1, coating a bottom adhesive on a film, and heat setting one side of the bottom adhesive close to the film; S2, compounding the heat-set bottom adhesive with base paper, curing the bottom adhesive, and forming a bottom coating layer on the surface of the base paper; S3, vacuum aluminum plating on the side of the bottom coating layer away from the base paper to form a vacuum aluminum-plated layer; and S4, coating a surface adhesive on the side of the vacuum aluminum-plated layer away from the bottom coating layer, curing to form a surface coating layer, and obtaining vacuum aluminum-plated composite paper. The dry-wet compounding process can improve the amount of the bottom adhesive without causing overflow of the bottom adhesive, improve the folding resistance of the obtained vacuum aluminum-plated paper, and solve the color explosion problem.

A packaging layer arrangement (110) for manufacturing a packaging container comprises: - a paper layer (112) as a carrier layer, - an oxygen barrier layer (120) such that the oxygen transfer rate of the packaging layer arrangement (110) does not exceed 1.1 cm³ / (m²·d·bar) according to DIN 53380-3, measured at 23 °C and 50% relative humidity, - a metallization barrier layer arrangement (122) formed by vacuum deposition, wherein the packaging layer arrangement (110) additionally comprises a water vapor barrier layer (118) such that the water vapor transfer rate of the packaging layer arrangement (110) does not exceed 1.1 g / (m²·d) according to DIN EN ISO 15106-3, measured at 38 °C and 90% relative humidity, wherein the oxygen barrier layer (120) is located in the layer sequence (LS) between the water vapor barrier layer (118) and the metallization barrier layer arrangement (122), wherein the packaging layer arrangement (110) has a cover layer (124),wherein the metallization barrier layer arrangement (122) is arranged between the paper layer (112) and the cover layer (124). The cover layer (110) is predominantly formed from a polyolefin blend or from a copolymer based on styrene and acrylic or from a thermoplastic elastomer.

The invention discloses a method for improving evenness of two-side offset paper, and relates to the technical field of papermaking, the freeness of each sizing agent is accurately controlled, and a mixed sizing agent ratio is adopted; a ternary retention system is adopted, and cationic polyacrylamide, anionic polyacrylamide and silica sol are added; a forming net is adopted, uniform fiber distribution is promoted by delaying the dehydration speed, and meanwhile the speed of a paper machine is stably controlled to avoid speed fluctuation; squeezing, pre-baking, sizing, post-baking and calendaring; and a coiling process. The method is suitable for the production and manufacturing process of the two-side offset paper, the produced two-side offset paper can be widely applied to multiple scenes such as printing and writing, and the problems that in existing two-side offset paper production, the uniformity index is low, the product quality consistency is poor, fibers are prone to flocculation to form pulp balls in the production process, the paper structure uniformity is affected, the unit consumption of chemicals is too high, and the production cost is low are solved. Therefore, the problems of high production cost, insufficient operation stability of a paper machine, large fluctuation of technological parameters and the like are solved.