Food Contact Migration Testing

Molded container and package for storing oil-containing foods that prevents coloration and odor migration from the food into the container. The molded container is made of a metal laminate packaging material with a heat-sealable inner layer of homopolypropylene film. The homopolypropylene film has high melting point, crystalline melting energy, and tensile yield stress to prevent migration of coloring and odor components from the food. The container also has features like a flange with notch, reinforcing layer, base layer treatment, and specific layer stacking to further reduce migration. The container can be heat-sealed to a lid to make a package.

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Reusable plastic bottles that resist odor absorption and prevent odor transfer between refills. The bottles are made with coffee additives or flavors incorporated into the plastic material. This reduces the absorption of small odorous molecules into the plastic compared to plain polyester bottles. The coffee additives/flavors are added to the plastic during molding or extrusion, not just coated on the surface. This prevents the coffee taste from transferring to the product. The coffee-infused plastic also has a discolored appearance from the coffee additives which provides UV/light protection.

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Liquid repellent packaging materials for preventing adhesion of contents like foods, liquids, and gels to the inner surface. The materials have a liquid repellent coating formed using a specific resin composition. The composition contains a propylene resin (A) with a specific blend ratio of random and block polypropylene segments, and a silylated polyolefin (B) as the liquid repellent component. The segment ratio of A provides optimal crystallinity and melting point for precipitating silicon on the surface to improve repellency.

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Reducing ink transfer from printed packaging materials into food products during packaging without adding layers or coatings. The method involves curing the inside layer of the packaging material to bind any ink particles that migrate from the outside printed layer during production. This prevents the ink particles from being released into the food during filling.

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Reducing the risk of ink particles from printed packaging transferring into food products during manufacturing. The method involves curing the inner layer of the packaging material to bind ink particles that migrate from the outer printed layer. This prevents the ink particles from being released into the food product. The packaging material is formed into packages and filled with the product without a separate ink migration preventing layer. This avoids compromising efficiency and versatility compared to adding a separate layer.

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Sealing material for packaging containers that balances sealing properties in the presence of liquids with low elution of contaminants. The sealing material composition contains ethylene/unsaturated ester copolymer and acid-modified styrene copolymer. The ethylene copolymer content is 60-99% by mass, with the acid-modified styrene copolymer making up the rest. This composition improves low elution of contaminants compared to traditional sealing materials containing ethylene copolymer and tackifying resin.

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Halogen-free metal bottle caps with improved sealing performance for containers like beer bottles. The caps have a molded sealing insert made from a specific polymer compound. The compound contains a scavenger that captures oxygen to prevent taste alterations in the contained beverages. The scavenger is incorporated into the sealing insert during molding. The caps can be made thinner than conventional ones by using a lower gauge tinplate because the molded sealing insert provides sufficient sealing force. The thinner caps save material costs. The scavenger in the sealing insert prevents oxidation and flavor alterations of the contained beverages by capturing oxygen that enters the container.

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Laminate for food and beverage packaging bags that reduces odor transfer from the packaging material to the contents and prevents yellowing during sterilization. The laminate contains a sealant layer with a gamma ray and electron beam irradiation resistant resin that adsorbs small amounts of decomposition gas from the resin during sterilization. This resin has low content of low molecular weight components that decompose during irradiation. The sealant layer also has a resin decomposition gas adsorbent like hydrophobic zeolite to capture any remaining odor-causing gases.

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Aromatic amine-free flexible packaging adhesive that does not suffer from aromatic amine migration, has sufficient cure speed for packaging applications, and provides good bond strength. The adhesive is a two-component polyurea system where the isocyanate component reacts with a flexibilized polyaspartate. The flexibilized polyaspartate is made from a high molecular weight polyamine and a Michael addition reagent. The low viscosity polyaspartate allows rapid adhesive spread and bond formation in packaging lamination. The absence of aromatic isocyanates eliminates migration concerns.

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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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Packaging container and soft food package design to prevent transfer of taste and color between the soft food and liquid, as well as prevent crumbling of the soft food. The container has a recess for holding the soft food and a separate headspace above the food filled with liquid. This separates the soft food from the liquid and reduces contact between them compared to conventional containers where the soft food is suspended in the liquid.

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Foam material, composite material, multilayer structure, and package material with reduced migration of chemicals to contact objects. The foam material uses recyclable paper fibers, binder, foam promoter, surfactant, and a specific water-soluble softener to reduce migration. The composite material has the foam sandwiched between other layers. The multilayer structure is multiple composite layers. The package material is foam sandwiched between recycled paper layers. The method involves foaming the mixture, attaching it, then drying. The softener type controls migration.

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Plastic bottles with reduced odor transfer between refills to prevent contamination of reusable containers. The bottles have inner layers made with polyester containing coffee additives or flavors. This reduces absorption of small molecule odors from refill products like lemonade or vinegar into the bottle. The coffee components in the polyester seem to neutralize or mask the absorbed odors, making them less perceptible to the human nose. The coffee additives are introduced during bottle production by extruding the polyester with coffee extract or roasted coffee.

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Low-cost, sustainable food packaging made from paper with enhanced barrier properties against water, oil, and gases by coating it with a thin layer of graphene oxide (GO). The GO coating, applied in very small amounts, improves barrier performance compared to uncoated paper for all three substances. The GO-coated paper reduces absorption of water, oil, and gas compared to untreated paper. The coating process involves exposing the paper to an aqueous GO solution and drying it. The GO coating prevents absorption/transmission of substances like water, oil, and gas from the packaged food into the paper.

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BPA and PVC-free paint for the inner surface of metal bottle caps that provides good corrosion resistance, adhesion, and heat resistance without leaching hazardous substances into food. The paint composition uses acrylic resin with a molecular weight of 10,000-20,000, phenolic resin, pigment, solvent, and additives. It provides high solid content, hiding power, and workability for molding and sterilization. The paint contains no BPA or PVC and has lower environmental impact compared to epoxy or PVC paints.

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Flexible pouch for alcoholic beverages that provides improved protection and sensory quality for alcoholic drinks packaged in flexible pouches. The pouch has a film laminate panel with inner and outer layers, plus a middle barrier layer. The outer layer is PET and the inner layer is PE. This laminate construction reduces oxygen permeability and prevents flavor, aroma, and color degradation of the alcoholic beverage inside. The pouch also has a double seal at the top joining the front and back walls to prevent leakage during filling.

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Packaging bags for processed foods like Danish pastries that have a porous bottom layer and a moist upper layer. The packaging bags prevent moisture migration between the layers to maintain texture. The bags use synthetic resin films with controlled water vapor permeability. The films overlap without openings to seal the food. The films have similar permeability and thickness. By setting the water vapor permeability within an appropriate range, the bags maintain appearance, texture, and taste for stored food with porous and moist layers.

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A monomaterial packaging film for foods that has both antibacterial and antifungal properties even when the contents contain relatively little moisture. The film is a multilayer structure with a sealing layer containing a water-soluble antibacterial agent. The film is made primarily of propylene resin (75% by mass) with less than 25% of foreign components. This allows the film to be recycled as a monomaterial. The film has low water vapor permeability (9.0 g/m2/24hrs) to prevent moisture migration. The antibacterial agent in the sealing layer prevents contamination of the food without migrating to other layers. The film structure prevents the antibacterial agent from escaping into the food.

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Electron beam curable coating composition for food packaging materials that provides improved migration and water resistance compared to traditional electron beam curable coatings. The composition contains a high percentage (70% or more) of acrylate components with a molecular weight over 500, and a lower percentage (2.5-25%) of urethane acrylate components with an isocyanate group. This composition reduces migration by eliminating low molecular weight acrylates, while the high molecular weight acrylates provide water resistance. The isocyanate-containing urethane acrylates further enhance water resistance. The composition can also contain finely dispersed resin particles, leveling agents, silica, and other additives.

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Susceptor ink composition for microwave-safe containers that provides better printing quality, stability, and food safety compared to conventional ink formulations. The ink contains aluminum particles as the conductive material, along with a specific ratio of aliphatic polyurethane varnish and solvent. This composition allows simpler, more efficient, and more profitable microwaveable containers that maintain integrity during cooking and don't contaminate food. The aluminum concentration is 19.4% by weight. The ink provides good printing quality, stability, and food safety benefits like minimized unexpanded grain and contaminant migration compared to conventional formulations.

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