916results about "Paper coating" patented technology

The invention discloses a double-PHA barrier system for a paper-based container and a paperboard as well as a preparation method and application of the double-PHA barrier system, and belongs to the technical field of paper-based material surface engineering and green packaging. The system sequentially comprises a paper base material, a water-based PHA dispersion hole sealing layer and a PHA extrusion compact layer from inside to outside. According to the invention, the micron-sized PHA dispersoid without cell debris is utilized, so that an efficient hole sealing effect which is difficult to achieve by a high coating amount in a traditional process can be achieved by only needing an extremely low coating amount, and the pinhole defect of an extrusion layer is eliminated from the source. And in cooperation with the modified PHA extrusion layer with the specific crystallinity, the problem of micro-cracking of a single coating during edge rolling forming is cooperatively solved. According to the system, excellent barrier performance is achieved through a thinner bio-based structure, and meanwhile the system has a wide heat sealing window and excellent repulp recycling performance. Compared with the prior art, on the premise that high performance is guaranteed, the consumption amount of packaging materials and the environmental burden are remarkably reduced.

The invention discloses a large-size green packaging carton and a preparation process thereof, and relates to the field of packaging box preparation. The environment-friendly composite material comprises the following raw materials in parts by weight: 50-80 parts of plant fiber slurry, 10-25 parts of a modified starch-based adhesive, 5-15 parts of a nanoscale inorganic reinforcing filler, 1-5 parts of a degradable water repellent agent, 0.5-3 parts of a cross-linking agent and 2-8 parts of starch and plant fiber composite buffer microspheres. According to the preparation method, full-environment-friendly raw materials such as plant fiber slurry and a modified starch-based adhesive are selected and matched with starch and plant fiber composite buffer microspheres, and optimized processes such as segmented temperature control pressurization molding, adhesive gelatinization treatment, stirring speed reduction and microsphere structure protection are combined; and through coating of the degradable polymer coating and micron-sized hydrophobic texture imprinting, synergistic improvement of high compressive strength, excellent buffering performance, excellent hydrophobic and damp-proof effects and high degradation rate of the carton is achieved.

The invention discloses environment-friendly high-barrier packaging paper and a preparation method thereof, and belongs to the technical field of paper product manufacturing. The method comprises the following steps: dispersing bleached sulfate softwood pulp in an aqueous solution of TEMPO and NaBr, adding a NaClO solution, adjusting the pH value, carrying out a reaction, washing the product obtained by the reaction, and carrying out high-pressure homogenization to obtain TEMPO oxidized nanocellulose (TOCNF); mixing the bleached sulfate softwood chemical pulp, hardwood pulp and viscose fibers, pulping, papermaking and the like to obtain original paper; then, TOCNF and waterborne epoxy modified acrylic emulsion are mixed, and a mixed coating is prepared; and finally, coating the surface of original paper with the coating according to a certain mass ratio, and carrying out hot-pressing curing to obtain the environment-friendly high-barrier packaging paper. The packaging paper is excellent in mechanical property, high in barrier property, good in surface uniformity and printing property, environment-friendly and degradable in raw materials, simple to prepare and low in cost.

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 invention discloses a compostable and reslurrable mineral-based dual-scale barrier coating as well as preparation and application thereof, and belongs to the technical field of water-based and reslurrable barrier materials. In order to overcome the defects of high coating weight, large color difference or difficulty in recovery in the prior art, a compact barrier is constructed through double-scale collaborative design of interlayer intercalation of layered double hydroxides and interparticle metal micro-networks. The method has the prominent advantage that high-efficiency water-oxygen barrier better than that of a conventional scheme can be realized only by using an extremely low coating amount. Meanwhile, the coating strictly controls color difference to maintain high whiteness of the paper, has pH responsiveness, can be quickly unlapped and dispersed under an acidic condition, and is easy to re-pulp. The coating does not contain PFAS and PVDC, and unification of high barrier, high whiteness and recoverability is achieved.

The invention discloses a paper base-PHA double-sided composite soil biodegradable agricultural mulching film as well as a preparation method and application thereof, and belongs to the technical field of agricultural mulching materials and green high polymer materials. The mulching film comprises a paper base layer and a homologous polyhydroxyalkanoate covering layer arranged on the surface of the paper base layer. Through double-sided synergy of the water-based PHA coating on the soil sticking surface and the thermoplastic PHA extrusion film layer on the windward and rainy surface, and in combination with a'wet-to-heat 'integrated composite process and trace anhydride grafting, super-strong combination of a paper-plastic interface fiber tearing level is realized, and the problem that traditional paper-plastic is easy to layer is solved. Compared with a traditional fluorine-containing product, on the premise that total organic fluorine is not detected, the excellent barrier and moisture conservation performance is achieved with the thinner coating thickness by means of double barriers. The product has excellent mechanical laying adaptability and long-season weather resistance, is fully biodegradable, thoroughly solves the hidden dangers of micro-plastic residues and persistent organic pollutants, and is an ideal green agricultural covering material.

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.

The present invention relates to a method for manufacturing a barrier-coated substrate web, coated with a layer of reduced graphene oxide. The invention further relates to laminated packaging materials comprising the barrier-coated substrate web, in particular intended for liquid carton food packaging, and to liquid carton packaging containers comprising the laminated packaging material.

Multi-ply structures incorporating adhesive compositions, products produced from such structures, and methods of producing the structures.

The application discloses a mineral-based easily-recyclable compostable water-barrier coating and a preparation method thereof, and belongs to the technical field of paper-based packaging materials. The coating is formed by a biodegradable film-forming system and a hierarchical lamellar mineral system containing three different scales and morphologies. The mineral system contains specific morphology and size of lamellar kaolin, non-asbestos grade lamellar talc and fully exfoliated sodium montmorillonite. The mineral lamella forms a dense parallel spread barrier path in the coating through a specific coating and drying solidification process, and combines a pH value responsive reversible cross-linking system to achieve excellent water vapor and oxygen barrier properties, water resistance and oil resistance at a low dry weight of 8-15 g / m2. The coating system does not contain polyvinylidene chloride and perfluoro and polyfluoro alkyl substances. The paper-based material coated with the coating is easily defibered and recycled under standard alkaline warm water conditions, and the fiber recovery rate is high, and meanwhile, the whole material meets the industrial composting requirements.

The invention discloses a plastic-free low-shrinkage waterproof oil-proof barrier type modified acrylate emulsion and a preparation method thereof, the plastic-free low-shrinkage waterproof oil-proof barrier type modified acrylate emulsion comprises the following raw materials by mass: 3-12 parts of a nano dispersion, 13-42 parts of a hard monomer, 30-55 parts of a soft monomer, 3-10 parts of a silicon-containing monomer, 4-12 parts of a polyfunctional monomer, 0.1-3 parts of an initiator, and 2-13 parts of a reactive emulsifier; the modified acrylate emulsion is prepared from a nano dispersion, a hard monomer, a soft monomer, a silicon-containing monomer, a polyfunctional monomer, an initiator and a reactive emulsifier through soap-free emulsion polymerization. The plastic-free low-shrinkage waterproof oil-proof barrier emulsion is prepared through soap-free emulsion polymerization, the prepared emulsion is small in particle size, can form a dense film after being coated on the surface of paper, and has good barrier performance on water vapor, oil and the like; according to the plastic-free low-shrinkage waterproof oil-proof barrier emulsion, a polyfunctional structure, especially structures containing-COOH,-OH,-NH2,-NH-C (= O)-NH-and the like, is introduced into a molecular structure, so that the emulsion has good adhesion to paper-based fibers.

The present disclosure relates to a machine glazed paper comprising softwood fibers, the machine glazed paper comprising starch to an amount within the range of from 0.1 wt. % by weight to 2 wt. % of the dry weight of the machine glazed paper. the amount of softwood fibers of the total amount of fibers being 63 wt. % or more, and the machine glazed paper having a Cobb value within the range of from 20 gsm to 50 gsm. as measured according to the standard method ISO 535:2014. The present disclosure furthermore relates to a method of producing the machine glazed paper.

The present invention relates to a barrier paper or barrier film for a food or liquid packaging laminate, said barrier paper or barrier film comprising: a substrate layer comprising a highly refined cellulose composition comprising fibers obtained from used beverage cartons (UBC), and a polymeric gas barrier coating disposed on at least one side of the substrate layer.

In an embodiment, a package enclosure can include a first creped paper packaging material and a second creped paper packaging material. The first creped paper packaging material can include a first single-layer creped packaging paper. The second creped paper packaging material can include a second single-layer creped packaging paper. The first creped paper packaging material and the second creped paper packaging material can define a respective material perimeter, with the second creped paper packaging material being attached to the first creped paper packaging material proximal their respective material perimeters to form a set of bound borders. The first creped paper packaging material and the second creped paper packaging material can thereby be attached together in a manner to define a package enclosure. The materials used for the package enclosure may be referred to as a package material combination.

Methods of making films with feedstock comprising biomass. The methods include treating a feedstock comprising biomass with an acidic aqueous solution to yield a solid phase and a liquor, generating a forming fluid with the liquor, and generating a film from the forming fluid. Some versions include comminuting the solid phase to generate a comminuted solid phase and including the comminuted solid phase in the forming fluid. The biomass preferably contains relatively high amounts of pectin and protein. The films can be in the form of standalone films or coatings on substrates such as paper. The films provide oil and grease resistance and air impermeability, among other advantages.

The invention relates to the technical field of papermaking and food packaging materials, in particular to a preparation method of full-degradable plastic-substituted high-strength food packaging paper. Preparing a fiber layer by taking plant fiber as a base material; the preparation method comprises the following steps: grafting a methyl methacrylate-butyl acrylate block copolymer on nano-cellulose through an atom transfer radical polymerization technology to prepare enhanced nano-cellulose; dialdehyde starch rich in aldehyde groups and chitosan are subjected to a Schiff base reaction to form a dynamic cross-linked network, polylactic acid microspheres modified by beta-cyclodextrin are introduced to serve as supramolecular enhancement units, and functional coating liquid is prepared; and finally, coating the functional coating liquid on the fiber layer, and drying, cross-linking and curing to obtain a finished product. Through cooperation of chemical grafting, dynamic covalent bonds and supramolecular action, the packaging paper is endowed with extremely high strength and toughness and excellent oil and moisture resistance and heat sealability, meanwhile, it is ensured that the packaging paper can be completely biodegraded in the natural environment, and functional replacement of traditional plastic packaging is successfully achieved.

The application belongs to the field of paper-based materials, and provides a high-strength paper-based packaging material and a preparation method thereof. First, a water-based polyurethane with complete biodegradability and better strength modification effect is developed by using polyester polyol as a reaction soft segment and using completely degradable composite monomers (DMPA and BDO) as raw materials, and then the water-based polyurethane is compounded with dialdehyde starch-PVA to prepare a high-strength paper-based packaging material, which comprises: the base paper is loaded with at least one dialdehyde starch / PVA layer; the dialdehyde starch / PVA layer is loaded with at least one water-based polyurethane layer; and the raw material of the dialdehyde starch / PVA layer is composed of the following raw materials in parts by weight: dialdehyde starch 1-6 parts, PVA 1-3 parts. The application develops a coating layer with high strength, so as to perform surface modification on paper and give the paper sufficient mechanical properties to meet the demand of replacing plastic products.

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.

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 belongs to the field of biomass-based functional materials, relates to a difunctional coating based on enzymolysis modified cassava starch as well as a preparation method and application of the difunctional coating, and innovatively solves the technical problem that a single coating gives consideration to oil prevention and water absorption through a synergistic technical path of pretreatment and composite enzymolysis. The core mechanism is as follows: the starch particle structure is destroyed through pretreatment, and the degradation degree of starch is accurately controlled through the synergistic effect of alpha-amylase and saccharifying enzyme, so that an unexpected technical effect is achieved, and an enzymolysis product with a film-forming skeleton (medium molecular weight dextrin) and a hydrophilic unit (small molecular saccharide) is formed; meanwhile, a compact and continuous network structure can be formed by a film-forming framework, and grease permeation is blocked; and the hydrophilic unit endows the coating with a rapid capillary water absorption effect.

The invention belongs to the technical field of novel environment-friendly printing and water-based packaging protection materials, and discloses high-wear-resistance degradable water-based plastic-replacing oil, a preparation method and application of the high-wear-resistance degradable water-based plastic-replacing oil. Water-based matte polyurethane, a water-based acrylic polymer and water-based bright polyurethane serve as core film-forming substances, and water-based matte polyurethane, water-based acrylic polymer and water-based bright polyurethane serve as core film-forming substances; degradable reinforcing agents such as nano-crystalline cellulose and functional auxiliaries are compounded, and a step-by-step dispersion technology is adopted for preparation. Through cooperation of the formula and the technology, the comprehensive performance that the A4 paper is resistant to abrasion for more than 3000 times, the natural biodegradation rate is more than 3000 times, the folding and explosion resistance is 30 times and the like can be achieved, complex chemical modification is not needed in the technology, the production period is remarkably shortened, a traditional BOPP film covering technology can be replaced, and the method is suitable for a high-speed printing and packaging production line and is suitable for protection of various paper packages such as digital electronics, cosmetics and tobacco and wine. The problems that a traditional BOPP covering film is difficult to degrade, wear resistance and degradation of existing water-based plastic replacing oil are difficult to consider, and quick drying conflicts with film forming are solved.

A low basis weight, low opacity paper is disclosed. The low opacity paper is made from a fiber web containing highly refined cellulose fibers. The fiber web is coated with a bio-based wax such as coconut-based wax, palm-based wax, or soy-based wax. The resulting product may have a relatively low basis weight and relatively low opacity. Therefore, the product may have excellent transparency or translucency characteristics.

To provide a biomass water-soluble surfactant composition that imparts excellent wettability, permeability and takes care of solubility in water and an environmental issue, and an ink in which the composition is blended, and a paper coating agent.SOLUTION: A water-soluble surfactant composition has a biomass degree of 10% or more, comprising: (A) an acetylene glycol represented by the following formula (1): (wherein R1 and R2 each are an alkyl group having 1 to 5 carbon atoms) and / or an ethoxylated acetylene glycol represented by the following formula (2): (wherein R3 and R4 each are an alkyl group having 1 to 5 carbon atoms, m and n each are positive numbers of 0.5 to 25, and m+n is 1 to 40); and (B) at least one bio-derived polyoxyalkylene-added nonionic surfactant.SELECTED DRAWING: None

This invention discloses an aqueous dispersion of a polyhydroxyalkanoate-grafted ethylene-acrylic acid copolymer with a self-emulsifying core-shell structure, its preparation method, and its recyclable paper packaging, belonging to the field of reactive modification of polymer materials and green packaging technology. This invention employs in-situ reactive extrusion technology to construct stable microparticles with a hydrophobic polyhydroxyalkanoate core and a hydrophilic ethylene-acrylic acid copolymer salt as the shell, overcoming the industry challenge of poor compatibility of bio-based materials. The aqueous dispersion requires no external emulsifier, achieving the same excellent barrier and heat-sealing effects with a lower coating weight, significantly reducing usage costs. Its unique alkali-induced swelling mechanism endows the coating with intelligent peeling properties, achieving efficient separation of the coating and fiber during resizing, greatly improving the purity of recycled fibers.

The invention relates to fluorine-containing epoxy acrylate and a preparation method thereof, in particular to fluorine-containing epoxy acrylate and a preparation method thereof. The problems that in the prior art, bonding of nano particles is not firm, and the transparency of a coating is poor are solved. The method comprises the following steps: dissolving tridecafluorooctyl methacrylate, glycidyl methacrylate, a KH-570 silane coupling agent and an initiator by using 1, 4-dioxane as a solvent, introducing high-purity nitrogen into a reaction container for a certain time to remove oxygen in the reaction container so as to prevent polymerization inhibition, controlling the reaction temperature and the stirring rate, and reacting for a certain time to obtain the tridecafluorooctyl methacrylate. Keeping the introduction of nitrogen; contacting the reaction system with oxygen, cooling and quenching the polymerization reaction; adding the reaction liquid into cyclohexane of which the weight is five times that of the reaction liquid to remove unreacted monomers; drying the purified product in a vacuum oven, and grinding into powder; and cleaning commercially available filter paper with acetone. The invention belongs to the technical field of acrylic resin synthesis and superhydrophobicity.

The present invention relates to a method of manufacturing a heat-seal packaging material (1) comprising: providing a support layer (2b) comprising paper (2a), applying a first barrier coating composition (7) in the form of an aqueous dispersion, thereby forming a first barrier coating (4) comprising at least 45% by weight of a binder based on the total dry weight of the first barrier coating (4), and applying a second barrier coating composition (7) in the form of an aqueous dispersion, thereby forming a second barrier coating (4) comprising at least 45% by weight of a binder based on the total dry weight of the first barrier coating (4). Applying a second barrier coating composition (8) to form a second barrier coating layer (5) wherein the second barrier coating composition (8) comprises a dispersed heat-sealing polymer which comprises at least 45% by weight of the total dry weight of the second barrier coating layer (5). The invention also relates to a heat-sealing packaging material, to a package comprising the heat-sealing packaging material, and to the use of the heat-sealing packaging material (1) in a package.

The invention discloses a preparation process and application of modified polymer-based oil polish, and the preparation process comprises the following steps: adding deionized water into a reactor, adding an emulsifier and modified silicon dioxide, adding part of methyl methacrylate, ethyl acrylate, butyl acrylate and acrylic acid, and uniformly stirring; adding an ammonium persulfate aqueous solution for reaction, dropwise adding the residual parts by mass of methyl methacrylate, ethyl acrylate, butyl acrylate and acrylic acid, heating for reaction after the dropwise addition of the monomer is completed, cooling to room temperature after the reaction is completed, and filtering to obtain a modified acrylate emulsion; uniformly mixing the modified acrylate emulsion, a flatting agent, a wetting agent, a coalescing agent, a defoaming agent and deionized water, and filtering to obtain the modified polymer-based oil polish. The oil polish disclosed by the invention has excellent leveling property, high glossiness and good wear resistance.

The present invention relates to an eco-friendly packaging material and a manufacturing method therefor. Specifically, the packaging material according to an embodiment of the present invention includes a surface coating layer, a first fiber layer, a second fiber layer, and a sealing coating layer, and thus has high recyclability and decomposes well in the soil and ocean, and may have excellent oxygen and / or moisture barrier properties, printability, antifouling / water resistance properties, sealing properties, etc.

The present disclosure provides a decorative sheet used for a production of a resin-impregnated decorative plate, the decorative sheet comprising a porous substrate; a design layer; and a release layer formed in a pattern, in this order in a thickness direction, wherein a 60° gloss value of the release layer is 10 or less; a pure water contact angle of the release layer is 85° or more; and a Spc (arithmetic average curvature at mountaintop point) of the release layer is 80 mm-1 or more.

A decorative sheet includes: a primary film layer; and a surface protective layer provided on one surface of the primary film layer. A surface of the surface protective layer has asperities including a plurality of ridge portions each protruding in a ridge-like shape, in a power spectrum obtained by Fourier transforming a surface profile of a cross section of the surface protective layer, a power ratio x of the mean of the common logarithm of power within a spatial frequency range of 500 cycles / mm or more and 1000 cycles / mm or less, log Pf500-1000, to the mean of the common logarithm of power within a spatial frequency range of 3000 cycles / mm or more and 3500 cycles / mm or less, log Pf3000-3500, is within a range of 4.0 to 13.5, and the surface protective layer has a gloss of less than 10.