Anti-Stick Coatings for Minimal Residue in Food Packaging

Coating material composition for films that have improved stability and flow properties when stirred. The composition contains a fluororesin like PTFE, a polymer with a specific structure, and an aqueous medium. The polymer contains a monomer with a specific structure. The composition has a low content of the polymer (less than 2,000 ppm) compared to the fluororesin. This allows stable coating solutions with good flow properties for coating applications. The composition is also free of certain fluorine-containing compounds containing hydrophilic groups.

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Sealant film with improved liquid repellency, heat sealability, and slipperiness compared to existing films. The film contains a sealing layer made with a specific composition of polypropylene resin and silicon-containing polyolefin resin. The sealing layer has properties like low sealing strength at high temperatures, high sealing strength at lower temperatures, and low blocking force. This allows easy peeling of the film from containers without sticking. The film also has good liquid repellency due to the silicon-containing resin. The film can be used in packaging to enable easy removal of viscous contents without residue.

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Creating durable lubricious surfaces (DLS) that can maintain their low-friction properties when exposed to contact liquids like lotions, toothpaste, or food products. The DLS are formed by coating a substrate with a composition containing a liquid, particles, and an interfacial modifier. When a contacting liquid is added, some of the particles migrate into the liquid, forming an interfacial layer that reduces friction and prevents impalement. The interfacial modifier enhances the lubricating effect and durability of the DLS by modifying the interface between the contact liquid and the coating.

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Biodegradable coating for paper and paperboard that provides barrier properties like oil and grease resistance while allowing recyclability. The coating is formed by applying a metal cation solution to the substrate first, followed by a biopolymer solution. The metal cation reacts with the biopolymer to form a coating on the substrate. This two-step coating process allows forming a homogeneous film on the substrate instead of clumps. The coating can be made with biopolymers like alginate and calcium salts. The coated substrate has reduced metal cation content and can still be recycled.

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Coating composition for forming a super-water-repellent coating layer on food packaging materials like stick packs to minimize residue and improve usability. The composition contains natural wax, polyurethane, and silica aerogel in specific ratios. The natural wax helps water repellency, aerogel prevents loss of function during heat processing, and polyurethane increases durability. Applying this coating to food packaging reduces residue when opening and eating stick packs.

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Food packaging container with easily detachable inner coating that can be separated and discharged from the container. The container is made of a water-soluble material and has an inner coating film attached to prevent contact between the food and inner wall. The coating film is made separately, cut, and aligned with the container. Then it is attached to the inner wall. When the container is emptied, the coating film can detach and be separated, enabling easier disposal and reducing environmental pollution compared to non-detachable coatings.

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Additive organopolysiloxane composition for forming films with excellent release properties, and a curable composition comprising the additive organopolysiloxane. The additive organopolysiloxane has a specific branched polymer structure with controlled ratios of mono, di, and quadri functional units. It is combined with an organosilicon compound and a hydrosilylation catalyst to make the curable composition. This composition forms films with high release force without using solvents. The films can be used as release liners for adhesives.

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Polyethylene-based compositions for films with low adhesion and coefficient of friction. The compositions contain polyethylenes with specific densities, melt indices, and fatty acid amides, along with dimethylsiloxane. The compositions have densities of 0.865-0.915 g/cm3, melt indices of 0.5-25 g/10 min, and low adhesion due to the fatty acid amides. The compositions can be used in monolayer or outer layer films with low adhesion and friction, as well as multilayer films with low adhesion sealant layers.

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Soft water- and oil-repellent coating material that forms a tack-free coating with good water and oil repellency. The coating closely follows the deformation of rubber or resin surfaces. The repellent contains a copolymer of a perfluoroalkyl group-containing (meth)acrylic acid derivative and a (meth)acrylic acid ester with specific glass transition temperatures. The copolymer provides water and oil repellency, while the ester enhances softness and tack prevention.

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A liquid repellent structure that has good liquid repellency to oil or oil-containing liquids for a long period of time. The structure has a liquid repellent layer containing a fluorine-containing resin and a filler with specific properties. The filler has a BET surface area of 100-400 m2/g and a ratio of surface area to resin mass of 4.1-20. This allows the liquid repellent layer to have good liquid repellency to oil and maintain it for a long time.

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Coated cellulosic substrates like paper that resist oil and grease for single-use food applications without using PFAS chemicals. The coating is a blend of a lipophobic starch with a food grade starch having shear-thinning rheology. The lipophobic starch provides oil resistance while the food grade starch enables good runnability during coating application. The blended starch coating composition has specific weight ratios and solids contents to balance properties.

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A biobased barrier coating for making cellulose-based materials like paper more hydrophobic/lipophobic without affecting biodegradability. The coating contains a prolamine like zein and a polyol fatty acid ester like sucrose fatty acid ester. Applying this coating to cellulose surfaces makes them resistant to oil and grease without lowering surface energy like fluorocarbons. The coating is stable, biodegradable, and adheres well to cellulose after heat treatment. The fatty acid ester prevents water absorption and edge wicking, while the prolamine forms a film to block oil penetration.

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A tank for containing food products like milk, wine, and oils that reduces the need for frequent cleaning and saves time and money. The tank has a hydrophobic and oleophobic coating on the inner surface. This coating prevents residue buildup and makes it easier to slide out the contents when emptying the tank. The coating repels liquid food products like water and oils due to nanoparticles in the coating layer. This eliminates the need for frequent washing since the residue doesn't stick as much. The hydrophobic/oleophobic coating allows for less frequent cleaning compared to conventional tanks.

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Spray coating process to create durable, non-wetting surfaces that can maintain high non-wettability even after repeated use. The process involves spraying a suspension of solid particles onto a surface, followed by spraying an impregnating liquid onto the dried particle coating. The impregnating liquid fills the spaces between the particles. The particle coating and impregnating liquid together form a liquid-impregnated surface with improved durability compared to just particle coatings. The spray coating can be optimized by controlling factors like particle size, atomizing air pressure, drying conditions, and surface temperature.

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Oil and grease resistant cardboard that is fully repulpable and avoids blocking issues. The cardboard has two non-blocking, non-fluorinated, non-wax coatings on each side. The coatings contain pigment and binder but no fluorochemicals or wax. This allows barrier properties against oil, grease, and moisture without blocking or reducing recyclability. The coatings have specific weight ranges of 8.1-9.5 g/m2.

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A packaging container for storing cooked foods like curry that has excellent discharge properties. The container has an inner surface with a rough texture that forms a thick oil film when filled with the food. The oil film is made of a high viscosity liquid with a viscosity of 100 mPa·s or more. The thick oil film helps discharge the food contents more easily, especially cooked foods with lipids and solids, by reducing sticking and scraping. The rough inner surface is formed by blasting or other techniques to anchor the oil film. The oil film thickness is 10 g/m² or more.

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Creating textured surfaces that can be impregnated with liquids to improve their non-wetting properties. The method involves dissolving a solid in a solvent at a temperature above its saturation point, cooling it to room temperature to form a solid particle solution, and applying that solution to a surface to form a textured surface. The higher dissolution temperature prevents full solid precipitation in the initial solution. The lower cooling temperature keeps the solid partially dissolved. This allows forming a textured surface with solid particles suspended in the solvent, which can be impregnated with liquids. The textured surfaces retain their non-wetting properties after repeated use compared to conventional non-wetting surfaces that can become hydrophilic.

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Liquid-impregnated surfaces that are non-toxic and safe for human use or consumption. The liquid-impregnated surfaces have an arrangement of solid features defining interstitial regions filled with a preferentially wetted impregnating liquid. This configuration allows easy displacement of contact liquids like food products due to low roll-off angles. The non-toxic impregnating liquids and solids prevent evaporation and entrainment concerns compared to conventional superhydrophobic surfaces. The non-toxic liquid-impregnated surfaces can be used in applications requiring contact with edibles, drugs, and consumer products.

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Container design and coating technique to improve product release and reduce residual product in containers like jars and tubes, while maintaining stability of viscous products like mayonnaise. The container has inner surfaces coated with a lipid composition like medium chain triglycerides. The coating is applied to a portion of the inner surfaces, leaving other areas uncoated. This allows the product to adhere to the uncoated areas but slide off the coated areas. This prevents sticking and residue buildup. The coating coverage and lipid composition are chosen to balance release and stability.

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A food storage container that prevents food from sticking and absorbs excess juice and oil without degrading flavor. The container has an inner surface coated with an oil-absorbing layer. Part of this layer has a food adhesion preventing coating. This prevents food sticking to the oil-absorbing layer while still allowing absorption. The container can also have additional food adhesion preventing strips. The coating composition and layering prevent food adherence and peeling off.

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