Coatings for Package Protection

A PVDC (polyvinylidene chloride) emulsion for pharmaceutical packaging that provides improved barrier properties, thermal stability, and long-term stability compared to conventional PVDC emulsions. The emulsion is made by using a silica sol as the dispersant instead of traditional surfactants. This avoids issues like decomposition, hydrolysis, migrant formation, crystallization, and poor thermal stability when heating. The silica sol also improves the water vapor barrier performance of the coating. The PVDC emulsion formulation contains 35-50% vinylidene chloride monomer, 0.5-5% comonomer, 0.1-0.5% initiator, 0.01-0.1% stabilizer, 5-7% silane coupling agent modified silica sol, and 30-5

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Barrier substrate for packaging containers with excellent gas barrier properties. The barrier substrate is made by coextruding a polyolefin-based stretched film with two resin layers containing polyolefin as the main component and an optional adhesive layer. A vapor deposition film is then applied to the outer surface. The barrier substrate can replace metal-coated substrates for better recyclability. The polyolefin-based barrier has good gas barrier properties and can be used in packaging containers without delamination or corrosion issues when filled with reactive contents.

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Multilayer substrate for packaging materials with improved gas barrier properties and adhesion between layers. The substrate has a stretched polypropylene layer sandwiched between an outer layer and an inner coating layer. The coating layer contains a resin with polar groups to improve adhesion of subsequent layers like vapor deposited films. This prevents delamination and improves gas barrier performance compared to polypropylene-only substrates. The multilayer substrate can be used in packaging applications and the packaging material is made by laminating the substrate with additional layers like vapor deposited films and sealant layers.

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Low opacity, biodegradable, and heat-sealable paper made from cellulose fibers coated with a bio-based wax to reduce opacity and improve barrier properties. The paper has a base sheet of refined softwood cellulose fibers with a basis weight of 10-25 g/m2. It is coated with a transparency agent like a coconut-based wax and a heat-sealable coating like a thermoplastic starch or protein. The coated paper has opacity less than 35% and can be used for packaging without supercalendering.

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Coating packaging materials like paper and cardboard with a thixotropic aqueous mixture to improve barrier properties like reducing gas and moisture transfer through the material. The coating composition contains smectite clay, a water-soluble polymer, and a cross-linking agent that links the clay to the polymer. Applying the mixture to a surface and heat treating crosslinks the clay-polymer barrier. This provides coated packaging with improved barrier properties for replacing single-use plastic in produce shipping.

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High-processability, high-temperature sterilization paint for the exterior of bottle cans that replaces the traditional 2-coat system with a simplified 1-coat overvarnish. The 1-coat composition contains specific resins to provide processability, adhesion, and sterilization properties similar to the 2-coat system. It uses a high molecular weight saturated polyester, a soft amino resin (like urea or blocked isocyanate) instead of melamine, and a low molecular weight epoxy resin. The composition replaces the size paint used for adhesion and processability, allowing a thinner coating with better flexibility and reduced damage during processing.

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Cover tape for electronic component packaging and electronic parts packaging body that suppresses adhesiveness and suppresses adhesion of components. The cover tape has a base material layer and a sealing layer on one side. The sealing layer has optimized surface properties to reduce adhesiveness and component adhesion. The sealing layer has a peak apex density of 3×10³ cm-2 and a root mean square slope of 1 µm or less. These surface property values suppress adhesiveness and component adhesion.

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Barrier-coated cellulose-based fibrous substrate for use in oxygen-sensitive packaging materials like cartons for liquid foods. The substrate has a cellulose base with a steam-resistant coating and an oxygen barrier coating applied by dispersion coating and drying. The cellulose substrate density is 700-800 kg/m3 and grammage 30-80 g/m2 for good porosity. The steam coating contains inorganic particles and polymer binder. This improves adhesion for the oxygen barrier coating. The substrate provides oxygen barrier in laminated packaging materials.

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Functional reinforcing paper with insect repellent, antibacterial, deodorizing, moisture proofing, and freshness maintaining properties for improved packaging quality. The paper has a coating with a functional material like insect repellent, antibacterial agent, deodorant, freshness retainer, or desiccant. It can also be used as a packaging material itself with contact surfaces containing the functional material. The coating enhances strength, water resistance, and oil resistance.

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Packaging material with reduced static electricity that can be manufactured using a gravure printing process. The material has an antistatic coating layer formed on a multilayer film using an antistatic treatment solution mixed with ethanol. The coating is applied by gravure printing and then dried. The antistatic coating contains polyurethane resin, conductive polymer, surfactant, crosslinker, and fluororesin. Ethanol improves coating properties, speed, and safety. The antistatic coating reduces friction static electricity to prevent contents from sticking to the packaging.

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A cover tape for packaging electronic components that reduces adhesion of components during transportation. The cover tape has a sealing layer with specific surface properties to prevent component adhesion. The sealing layer has a low roughness (0.05-0.5 μm) and low peak density (3x10/cm2) on its exposed surface. These surface characteristics suppress component adhesion when the tape is peeled off during transportation.

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Base paper for metallized paper that provides metallized paper with excellent printability and processability in automatic packaging. The base paper has a resin layer on one side and a pigment coating layer on the other side. The pigment content in the coating is 50-85% by mass. The side with the pigment coating has an Oken smoothness of 300 seconds or more and a dynamic friction coefficient against stainless steel of 0.35 or less. This improves printability and reduces friction when metallizing the paper. The coating layer properties remain after metallization.

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Laminate with improved adhesion properties when used with substrates containing antistatic agents. The laminate has three layers: a barrier layer, a resin layer, and a substrate layer. The resin layer contains a specific copolymer with ethylene and a dicarboxylic anhydride monomer. This copolymer provides good adhesion to the barrier layer and substrate layer even when the substrate contains an antistatic agent. The barrier layer has low oxygen permeability. The laminate can be used in packaging applications where the substrate contains antistatic agents.

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A cover tape for packaging electronic components that reduces warping and curling when applied to carrier tapes to improve package alignment and prevent component misalignment during mounting. The cover tape has a multi-layer intermediate layer between the base and heat seal layers. The inner layer contains a rubber-based material to improve adhesion. The outer layer has lower rigidity. This prevents internal stresses from pulling the tape and causing warping. The reduced warping helps prevent curling when the cover tape is applied to the carrier tape.

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Gas barrier films, packaging materials, and packages with improved barrier properties like oxygen and water vapor barrier. The films have a specific peak ratio in the infrared spectrum of the undercoat layer between the substrate and the barrier layer. This ratio is 0.25-1.20 for the peak heights of absorption bands at 1490cm-1, 1600cm-1, 3100cm-1, and 3600cm-1. This adjustment improves barrier properties without adding layers.

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Packaging material with low variance in barrier properties to extend shelf life of packaged products without using excessive coating materials. The packaging material has a base paper with a specific weight range, and coatings with cross-linked hydroxy polymer and wax. The base paper weight is 30-90 g/m2 to balance homogeneity and barrier effect. The first coating forms an oxygen barrier with cross-linked hydroxy polymer, and the second coating forms a water vapor barrier with polymer and wax. This combination reduces variance in barrier properties compared to high-weight base paper or excessive coatings.

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Packaging material with low variance in barrier properties like water vapor permeability to extend shelf life of packaged products. The packaging has a low basis weight paper base, an oxygen barrier coating with cross-linked hydroxyl groups, and a water vapor barrier coating with polymer and wax. Calendering between coatings smoothes the surface for low variance. The average water vapor permeability is 2-100 g/(m2*24h) with a formula for variance. This allows lower average barrier while reducing variance to extend shelf life compared to high average barrier materials.

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Mono-material food packaging with partially peelable lids that can be easily recycled without compromising functionality or cost. The packaging has a mono-material PET receptacle and a mono-material PET lid that seals to the receptacle. The seal has a peelable region where the lid can be partially removed, leaving the rest of the seal intact. This allows easy opening while keeping the lid attached for recycling. The peelability is achieved using an interference lacquer coating on the lid that weakens the seal at the peelable area, or by separate coatings for peelable and non-peelable regions.

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Cover tape for packaging electronic components that has high antistatic performance and allows easy peeling of end tape. The cover tape has layers in order: antistatic, base, intermediate, and heat seal. The antistatic layer has a surface resistivity of 1x10^10 ohms. The peel strength of an end tape attached to the antistatic layer is 2 N or less after storage at 40°C, 90% RH. The peel strength of the heat seal layer from the carrier tape is 0.15 N or more after storage at 40°C, 90% RH, with 125 kN/m pressure. This prevents tape delamination during device mounting. The antistatic layer contains a polyetheramine surfactant or long-chain alkyl group polymer that migrates to the surface. This compet

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Resin sheets with enhanced surface strength without using adhesives or bonding agents. The sheets have three layers: a first layer made from a thermoplastic resin or cellophane, an intermediate layer with low density polyethylene (LDPE), and a second layer. The first layer surface facing the intermediate layer is oxidized. This oxidation treatment improves adhesion between the layers. The LDPE intermediate layer with low density allows better interlayer adhesion compared to using high density polyethylene (HDPE). The oxidized surfaces prevent delamination. The method involves coating the films without adhesives. The molten resin film is extruded and continuously coated between the first and second films. The second film can be unstretched polyethylene, polypropylene, cyclic polyolefin, or a co-extruded film of unstretched polyethyl

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Shipping packaging with improved impact protection and reduced environmental impact compared to traditional foam-filled envelopes. The packaging has walls with embossed ridges on one side that correspond to depressions on the other side. The ridges join to a smooth sheet, holding them together. This creates a cushioning effect when objects inside impact the walls. The embossing and joining avoids using foam or plastic. The embossed paper provides impact protection while the smooth sheet covers the embossed side during shipping.

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Laminated metal sheet for packaging applications with improved adhesion and barrier properties compared to conventional methods. The laminated metal sheet has a predominantly uniaxially oriented laminate layer with an adhesion layer containing a specific copolyester and a bulk layer of poly(ethylene terephthalate). The laminate layer is preheated before application to provide initial adhesion, then post-heated without melting the bulk layer. This produces a specific Euclidean distance matrix between ATR FTIR spectra. The uniaxial orientation reduces deformation during forming. The specific copolyester in the adhesion layer improves adhesion to the metal. The post-heating prevents crazing and delamination during forming and opening.

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Hydroxyl-containing polyamide resin composition, laminate, packaging material, and gas barrier material with high gas barrier properties and solvent solubility. The composition contains a hydroxyl-containing polyamide resin, a metalloxane bond compound, and a catalyst. The hydroxyl-containing polyamide resin has specific hydroxyl group and diamine component amounts. The composition forms a coating with excellent adhesion and gas barrier properties. The coating can be used in packaging materials to prevent gases from penetrating. The metalloxane bonds in the coating have both amide and metalloxane functionalities. The hydroxyl groups on the polyamide and metalloxane compound react to form the coating.

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Heat-resistant varnish for coating heat-sealable packaging materials like polyethylene films. The varnish composition contains soluble nitrocellulose, wax, silica, and an organic solvent. The wax content is 0.5-3.0% of the varnish solids, and the silica content is 2.0-11.0% of the varnish solids. This composition provides excellent heat resistance, blocking resistance, and transparency when applied to mono-material packaging materials like polyethylene films. It prevents shrinking and distortion during heat sealing while maintaining transparency and resistance to blocking and abrasion.

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Molded fiber packaging that is suitable for wet products without using excessive plastic. The packaging is made by wet molding a fiber material like recycled paper or cardboard. To make it waterproof, the molded fiber is coated with a thin layer of hydrophobic material. This prevents water absorption and keeps the contents dry. The hydrophobic coating can be applied using techniques like spraying, dipping, or roller coating. The coated molded fiber packaging provides water resistance without adding plastic layers or inserts, reducing waste and simplifying recycling.

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Laminate with high oxygen and water vapor barrier properties that can be applied to substrates using a simplified manufacturing process compared to depositing thin films. The laminate has a barrier layer made from a composition containing a water-soluble polymer, an inorganic layered compound, and optionally metal alkoxides or hydrolyzed metal alkoxides. The ratio of water-soluble polymer to inorganic layered compound in the barrier composition is 0.3 to 3.0. This balanced composition provides good barrier properties without requiring additional thin film deposition steps. The laminate can be used in packaging bags to reduce oxygen and water vapor transfer to packaged goods.

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An aqueous primer for packaging laminates that provides improved adhesion and leveling of active energy ray curable coatings. The primer composition contains a binder resin, extender pigment, and water-based solvent. The primer has a surface tension of 24-38 mN/m and a surface free energy of 24-40 dyne/cm. The composition also contains a hydrophilic organic solvent and extender pigment like silica. This primer composition allows better transfer and leveling of the active energy ray curable coating onto the primer layer compared to traditional solvent-based primers.

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Waterproof paper with improved water resistance compared to existing waterproof papers. The paper has a specific composition and coating weights on both sides that provide excellent water resistance while maintaining smoothness. The key features are: 1. The paper base has pulp with an average Runkel ratio of 0.51 or less to promote smoothness. 2. Both sides of the paper have an undercoat layer containing latex and pigment, followed by a water-resistant layer. 3. The water-resistant layers have coating weights of 4 g/m2 each. 4. The total coating weight of both water-resistant layers is 20 g/m2. This composition allows the paper to have low Cobb water absorption on both sides when exposed to water at 20°C and 90°C. The waterproof paper can be used for packaging containers, cutl

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A laminate for liquid packaging that provides excellent aroma retention, recyclability, and heat seal strength. The laminate has a stretched polyethylene film, a heat seal layer, a coating layer, and an adhesive layer. The coating layer is a cured coating film made of a polyester polyol derived from ortho-oriented aromatic carboxylic acid and a polyisocyanate. The adhesive layer is also a cured coating film made of the same polyester polyol and polyisocyanate. This laminate can be used in liquid packaging materials like soap, shampoo, and detergent containers. The coating layers prevent odor loss and the adhesive layer enables good heat seal strength.

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A laminate for packaging bags that uses polypropylene for the innermost and outermost layers to enable wider heat sealing temperature tolerance. The laminate has an inorganic oxide layer and gas barrier coating on the inner base layer and/or intermediate layer. This prevents heat shrinkage during sealing while allowing higher temperatures compared to pure polypropylene layers. The laminate can widen the range of heat sealing temperatures for polypropylene-based bags without distortion issues.

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Coated packaging for oral, personal, and home care products to prevent product waste and packaging deformation. The coating inside the packaging contains an edible oil and surfactant to maintain a liquid state. This prevents adsorption/absorption of the product ingredients onto the packaging surface. The coating also helps protect the product from oxidation by reducing oxygen residues. The coated packaging allows easy dispensing of the product without leaving coating residue on the product.

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A food-grade barrier coating for molded pulp products like bowls, trays, and containers that provides water and grease resistance. The coating is made by crosslinking shellac resin applied to the pulp. The crosslinking involves thermal aging in an oven to melt and fuse the shellac chains. This creates a durable, water-repellent coating that penetrates the pulp fibers. The coated pulp products have low cobb (water absorption) and kit (grease penetration) values, making them suitable for food packaging. The crosslinked shellac barrier meets food migration limits at elevated temperatures.

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A sustainable and biodegradable packaging material made from coating chitosan on dry banana leaves. The method involves spreading a chitosan-glycerol solution onto a banana leaf, letting it dry, and repeating on the other side. This creates a flexible, smooth, and biodegradable packaging material that can be used for food items. The chitosan coating provides strength and moisture barrier properties, while also degrading completely in soil within 15 days.

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Sliding film, laminate, and packaging container with improved sliding properties against deposits while maintaining transparency. The sliding film is made by co-hydrolyzing or condensing an alkyltrialkoxysilane with 1-14 carbon alkyl group and tetraalkoxysilane. The sliding film has excellent sliding properties against deposits like oil adhesion in packaging containers. The sliding film can be applied to laminates and packaging containers by coating it onto a substrate and allowing it to react and cure. The coating process involves dissolving the silanes in a solvent, applying it to the substrate, and removing the solvent.

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Gas barrier laminate and packaging material with improved water vapor barrier properties for packaging applications like food, beverages, pharmaceuticals, and chemicals. The laminate has a paper substrate, a water-dispersible resin layer with silica particles, and a polyvinyl alcohol resin layer. The silica particles in the middle layer have a silanol group density of 10-70 µmol/m2 and aspect ratio of 10-100. This layer sandwiched between the paper and PVA layers provides enhanced water vapor barrier. The laminate can be used as a standalone packaging material or as an inner layer in multi-layer packaging.

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Making antibacterial thin films for food packaging using chitosan, organoclay, silver nanoparticles, and zinc oxide nanoparticles. The thin films are prepared by mixing these components in a solvent casting method. The chitosan provides the matrix, organoclay improves mechanical properties, silver nanoparticles provide antimicrobial activity, and zinc oxide nanoparticles further enhance antimicrobial properties. The thin films have reduced solubility, low water vapor transmission, and antibacterial activity against E. coli and S. aureus bacteria.

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Base paper for metallized packaging that provides vapor barrier properties and allows for high quality printing and automated packaging processing. The paper has a pigment coating on one side with specific pigment content (50-85%) and smoothness (Oken type smoothness >300 seconds) to enhance printability and processability. The other side has a resin layer for metallizing. The coating layer properties enable good print quality and avoids issues like ink trapping. The smoothness prevents ink streaking. The low coefficient of friction against stainless steel aids in automated packaging.

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Laminate structure for packaging bags with improved drop-breakage resistance. The laminate has a stretched polypropylene base material, an adhesive layer, a barrier layer with an inorganic oxide coating, another adhesive layer, and a polypropylene sealant layer. The barrier layer prevents gas permeation. The adhesive layers provide strong bonding between layers. The thick second adhesive layer and high modulus measured by AFM improve drop impact resistance. The laminate can be used to make packaging bags with better drop protection compared to traditional laminates.

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