Contamination Prevention in Food Packaging

Antimicrobial surface coating material for food packaging that prevents biodegradation and contamination. The coating is made by combining boron compounds like boric acid, disodium octaborate, and sodium pentaborate with gelatin or pectin based materials to create films. The boron derivatives provide antimicrobial activity against bacteria, fungi, and viruses when incorporated into the coatings. This prevents spoilage and extends shelf life by inhibiting growth of pathogens on the packaging surfaces. The coatings can be applied as thin films to food containers to provide antimicrobial protection.

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Barrier-coated cellulose-based substrate for packaging oxygen-sensitive products like food that enables robust induction heat sealing and provides good gas barrier properties. The substrate has a cellulose base coated with a thermostable polymer layer, then metallized by vapor deposition. This provides initial gas barrier and induction sealing compatibility. The metallization layer prevents permeation of oxygen and moisture. The thermostable polymer layer provides additional barrier and sealing resistance. The coating sequence allows using thin layers of materials with good barrier properties while maintaining sealing and induction compatibility.

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Metal detectable plastic bags for sample collection that can be used in food and pharmaceutical production to prevent contamination. The bags have a removable tear strip that contains metallic ink or coating to make it detectable by metal detectors. This allows the strip to be easily removed before filling the bag, preventing metal contamination of the product. The metallic material in the strip can be detected by metal detectors on production lines to prevent contaminated bags from entering the food or pharmaceutical stream.

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Laminated films with anti-microbial properties for food packaging that provide effective preservation without compromising food quality. The films have a barrier film sandwiched between transmission films, with a volatile liquid active between them. The active holds the films together at the interface and spreads into the food area to prevent microbial growth. The barrier film prevents oxygen/moisture while the active releases vapors to inhibit spoilage. The films can be manufactured by dispensing the active on the barrier film before lamination, heat sealing, folding, and cutting.

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Recyclable multilayer packaging material for containers that can be recycled and has improved chemical resistance compared to existing materials. The packaging is made of multiple layers of polypropylene (PP) bonded together using different adhesives. At least one PP layer is bonded to two neighboring layers using a different adhesive than the others. This configuration prevents delamination when exposed to aggressive filling goods. The different adhesives have different properties like bond strength, water vapor transmission rate, oxygen transmission rate, layer thickness, molecular weight, network structure, chain length, degree of cross-linking, and hydrophobicity. The multilayer packaging can be used for products like pharmaceuticals, home care, aggressive fillings, liquids, foods, and beverages.

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Contaminant-resistant packaging and dispensing systems for long-term storage and transportation of perishable items like food in remote areas. The packaging has an oxygen barrier to prevent spoilage, but the dispensing fitment is a weak point. The disclosure describes a contaminant-resistant dispensing fitment with an inner core material having lower oxygen permeability than the outer skin material. This reduces oxygen diffusion into the packaged item through the fitment. The core is enclosed by the skin to form a sealed head at one end and a lumen with an orifice at the other. The core/skin structure provides improved contamination resistance compared to using the skin material alone for the entire fitment.

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Robust, high-speed manufacturing method for barrier-coated paper or cellulose-based substrates suitable for packaging oxygen-sensitive products like food. The method involves coating a cellulose substrate with a thin layer of gas barrier polymer at line speeds over 300 m/min. The substrate is selected with low roughness and low water absorption. The coating is dried while maintaining substrate temperature. This step is repeated. The coated substrate can then optionally have a thin metal/oxide barrier coating. The coating process provides reliable barrier properties at high speeds without defects. The coated substrate can be used in packaging materials for long-term aseptic storage of food.

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Coated molded fiber containers for holding food products that provides improved barrier properties for direct food contact applications. The coating composition includes carboxylated polyvinyl alcohol (PVOH) copolymer, a crosslinking resin based on epichlorohydrin or azetidinium functional groups, and dispersed clay particles. The coating provides functionality like water vapor barrier, prevents food contamination, prevents coating dissolution in hot water, and prevents migration of oil and grease through the coating. The coating composition can have dry solids ratios of PVOH to crosslinker in the range of 4:1 to 9:1. The coated containers can be used for long-term storage of frozen or dry foods, and microwave heating without degradation or flaking.

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A package for extending freshness of perishable items like food by using a multilayer film with improved gas barrier properties and airtightness. The package has a folded multilayer film with an inner gas barrier layer and outer layers melting below 130°C. This allows folding and sealing the film without excessive shrinkage or deformation. The folding technique with low melting outer layers prevents stress concentration and wrinkling during folding. The inner barrier layer prevents gas permeation. The film also has specific adhesion, elongation, and oxygen barrier properties.

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Composite packaging with a mineral oil barrier to prevent migration of mineral oils from recycled containers into packaged products. The barrier is in the inner container that holds the product. It uses a combination of layers - a polyolefin film, an inorganic oxide coating, and a thin layer of vinyl alcohol polymer - to provide a highly effective mineral oil barrier. This allows recycling of the outer container made of recycled material containing mineral oils, while preventing contamination of the inner product from those oils.

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Corrugated paperboard inserts for plastic totes used in automated food handling systems. The inserts are designed to handle perishable food items like fruits, vegetables, and meat. They are made from a single sheet of corrugated paperboard with four side walls and an auto-locking bottom that eliminates the need for taping. The paperboard has a moisture-resistant, food contact rated coating on at least one side that is recyclable with standard uncoated corrugated board. This allows the inserts to be used for cleaning and disinfection without requiring additional totes, reducing costs. The coating prevents contamination and spoilage of food products while the inserts are in use, and enables easy cleaning and recycling compared to wax-coated corrugated.

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Laminated sheet and packaging body that suppresses adsorption of aromatic compounds like fatty acid esters while maintaining good sealing properties. The laminated sheet has a substrate with a sealant layer containing a crystalline polyester first resin layer and a second resin layer between the first resin and substrate. The crystalline polyester has a crystallization temperature of 120-150°C. This configuration prevents aroma adsorption on the sealant layer while avoiding issues like poor sealing when using crystalline polyesters alone. The innermost layer of the packaging body is formed of the crystalline polyester first resin.

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Paper-based packaging material for food containers that has a barrier layer on one side of the paper to prevent contamination or leakage. The barrier layer is applied between the paper and an optically perceptible surface coating. This allows the barrier layer to be removed during recycling without hindering the paper fibers from being recycled.

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Antimicrobial surface coating material made from gelatin or pectin films containing boron compounds to prevent contamination and spoilage of packaged foods. The boron derivatives like boric acid, sodium pentaborate, and disodium octaborate are added to the gelatin or pectin films at varying concentrations. The coating material shows antimicrobial activity against bacteria, fungi, and candida when applied to food packages. The boron compounds in the films release antimicrobial agents to inactivate pathogens and extend food shelf life.

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A multilayered flexible package with antioxidant properties obtained through a core-shell system dispersion. The package has a polymeric coating containing a dispersion of antioxidant capsules with a core-shell structure. The capsules have an antioxidant core and a polymeric shell covering it. The shell covers at least 70% of the core. The capsules are dispersed in the polymeric coating in an amount of 5-50%. The package has a thickness of 0.5-100 μm. The capsules are made from materials like chitosan and tannic acid. The capsules are monodispersed with a size of 0.1-10 μm.

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A laminate for packaging materials that provides improved chemical resistance and metallized layer adhesion. The laminate has a multilayer outer film with a polyolefin layer sandwiched between two barrier layers, and a multilayer middle film with a polyolefin layer sandwiched between two barrier layers. The outer film has a metallized polyolefin layer, and the middle film has a metallized polyolefin layer. The barrier layers provide improved chemical resistance.

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A film composite for flexible packaging that has a barrier layer to protect the imprinted cover film from fat migration. The barrier layer is formed from polyvinyl alcohol and is applied to the cover film. An equalization layer is applied between the cover film and the barrier layer to compensate for the uneven surface caused by the imprinting. The equalization layer is made from a hardened material like polyurethane.

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High-barrier packaging bags with improved gas barrier properties for protecting contents like food and medicines. The bags are made by thermally sealing barrier base films on at least two sides to form the body, with self-sealing openings for filling and closing. This provides an integral seal when the opening is closed. The barrier base films can be coated with layers to enhance gas barrier properties. A production process involves coating the films, winding them, and cutting and sealing them into bags. The coating step includes priming, barrier coating, and collecting excess coating to prevent blocking.

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A closure system for containers like flexible pouches with a cap and spout that have discrete barrier layers to prevent contamination of the contents. The spout has a conduit and seal member secured to the container. The cap encloses the conduit. The cap and spout each have an inner barrier layer and an outer thermoplastic layer. This provides a multi-barrier system to block oxygen, moisture, and contaminants from entering the pouch.

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A sustainable packaging material that replaces HIPS and PVdC in food packaging. The material has a unique synergy of components that provides various advantages like oxygen and moisture barrier, hot fill capability, trimability, oil resistance, acidic resistance, toughness, and heat sealing capability. The material is formed from layers of polymer blends that have a specific heterophasic morphology. The layers are coated with a barrier coating to improve the barrier properties.

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Recyclable lined molded fiber food containers that provide improved oil resistance, water resistance, and water vapor barrier for refrigerated and frozen foods compared to traditional molded fiber containers. The containers are lined with a thermoformable cellulose-based acetate film instead of petroleum-based films. The film is bonded to the molded fiber using suction to form a continuous liner. The cellulose-based acetate film avoids PFAs and provides similar performance to PET liners. The molded fiber base is made from virgin bagasse fiber pulp for sustainability. The lined molded fiber containers can hold oil and water better than plain molded fiber, making them suitable for food applications.

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A thermoplastic film for packaging that has one or both surfaces coated with a composition containing lauric arginate ethyl ester (LAE) without any polymer. The LAE coating provides antimicrobial properties to prevent contamination of packaged foods. The coating composition can be a dispersion of LAE in a water, ethanol, isopropyl alcohol, and ethyl acetate mixture. The coated film can be used to make flexible containers, vacuum skin packages, lidded packages, and wrapped packages for food products.

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Packaging for food that allows gases to escape while preventing oxygen from entering, like roasted coffee beans. The packaging has a bag made of film with a valve and microperforations. The microperforations allow gases like carbon dioxide to escape but prevent oxygen ingress. This prevents bursting while maintaining freshness. The microperforations are made by laser with melted edges to reinforce them.

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Water-soluble film that has improved barrier against diffusion of undesired chemicals (even water vapour) prior to being thoroughly immersed in water, yet can subsequently substantially dissolve or disperse when immersed in water, such as rinse water or wash water. The film comprises an integrated water-dispersible barrier against any permeation offering several advantages compared to prior-art water-soluble film executions; and a method for producing water-soluble films with an integrated water-dispersible barrier against any permeation.

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Oxygen-absorbing packaging material for blister packages that reduces oxygen inside the package to prevent food spoilage. The material is a layered structure of base, barrier, absorbent, and sealant layers. The absorbent layer contains compounds with unsaturated 5-membered rings and functional groups like -OH or -NCO. These compounds absorb oxygen and promote oxidation. An oxidation catalyst speeds up the reaction. The absorbent layer is sandwiched between the barrier and sealant layers to prevent oxygen ingress.

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Antimicrobial releasing agents to control, reduce and destroy microbial contamination in food packaging and other applications. The agents are entrained polymers with an active compound, a carrier material, and a trigger. The active compound releases antimicrobials like chlorine dioxide. The carrier material has a low pH to activate the release. The trigger is hygroscopic. Moisture activates the trigger which reacts with the active compound to release antimicrobials. This provides controlled release of antimicrobials into the headspace of sealed packages to reduce microbial growth.

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Lightweight insulated beverage bottle that prevents contamination, migration of metallic taste, and is shock-resistant. The bottle has an inner flask made of metal coated with an inert metal lining inside. This prevents metal particles from leaching into the beverage. An insulating layer between the inner and outer flasks provides thermal insulation. The outer flask is made of non-metallic material like plastics. The bottle has a lid with a sealing and locking mechanism. The lid is also coated inside with the inert metal lining to prevent contamination. This allows a non-metallic outer flask and lid while still having an inner metal flask for durability.

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Packaging system for perishable food products like fish that extends their shelf-life during transport, storage, and display. The system involves sealing the food in oxygen-permeable packages with high oxygen transmission rates, then enclosing those packages in a master pouch with an oxygen barrier film and a modified atmosphere of mostly carbon dioxide and very low oxygen. This helps prevent spoilage by limiting oxygen exposure. The master pouch can have oxygen scavengers, temperature indicators, and sealing machines optimized for reducing residual oxygen.

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A bag for preventing spoilage of food items when stored in high humidity conditions. The bag has an inner bag with calcium powder on the surface and an outer bag. The inner bag prevents putrefaction of the food by holding back bacteria and mold that penetrate through the outer bag. The calcium powder on the inner bag surface provides antibacterial and antifungal properties. The inner bag can be a porous fabric and the outer bag a strong material like polyethylene.

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Automated system for packaging, shipping, and dispensing food products like hamburgers, sausages, and vegetables in a way that reduces human contact and contamination. The system uses specialized "Dispenser Packs" that are filled using a Gathering System and then transported to a Dispensing System at the destination. The Dispenser Pack contains rolled or otherwise gathered food products. The Dispensing System automatically unloads the packs and dispenses the products without human contact. This provides a way to minimize microbial transfer and improve food safety by eliminating manual handling of the products.

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Barrier laminate material for improving the tightness of lunch boxes to prevent spoilage and leaks. The material consists of three layers: an inner layer of semi-crystalline polymer like polyethylene, a middle layer of alkyl acrylate emulsion polymer, and an outer layer of polyester film. The semi-crystalline polymer layer contacts the food, the middle layer provides barrier properties, and the outer layer seals against the environment. This sandwich structure provides better barrier, sealing, and food preservation compared to traditional lunch boxes.

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Coating compositions for packaging applications like food can interiors that contain a specific type of polymer made from cyclic carbonate compounds. The polymer, typically a polyether, is free of oxirane groups and does not contain bisphenol A or its derivatives. The cyclic carbonate compounds have multiple cyclic carbonate rings. The coatings provide improved corrosion resistance compared to traditional coatings like vinyl or epoxy coatings. The lack of bisphenol A and oxirane groups makes the coatings suitable for food contact applications. The coatings are applied to metal substrates before or after forming into containers, like food cans.

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Polyolefin composition for packaging applications that contains anhydrous magnesium sulfate as a hygroscopic filler without adding dispersants or antioxidants. The composition is made by kneading anhydrous magnesium sulfate into a polyolefin at reduced pressures below -65 kPa to remove moisture. This prevents evaporation during kneading that can cause agglomeration. The composition has good dispersibility of the magnesium sulfate and moldability without bleed-out of additives. The composition can be used to make packaging films that prevent moisture absorption in products like pharmaceuticals, food, and chemicals without contamination.

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Packaging with sealed end-faces to prevent contamination when forming containers like cups and containers for food products. The packaging has overlapping seams made of a frame material and a protective layer applied only to the inside. The protective layer extends beyond the frame material and is soldered to the mating surface during assembly. This isolates the protected end-face from the product inside.

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High-pressure processing system for pumpable substances like beverages that enables high filling coefficients and avoids contamination issues of traditional batch processing. The system uses a flexible bag inside the high-pressure vessel instead of rigid containers. A specialized plug seals the bag inlet/outlet. It has separate ducts for pressurizing fluid and product. A valve with a male seat and cleaning duct allows processing without contamination. The valve closes during processing to prevent product leakage. Afterward, the cleaning fluid flushes the product duct. This avoids contamination when switching products. The high-filling coefficient comes from processing the bag directly instead of flexible containers. The plug design enables hygienic sealing and cleaning.

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Re-sealable food storage bag with high oxygen barrier and antimicrobial properties to preserve fresh produce longer. The bag has an outer layer with an aluminum oxide-coated polyester film to block oxygen and prevent spoilage. The inner layer is an antibacterial layer that reduces bacterial growth. This combination of oxygen barrier and antimicrobial properties significantly slows down decay and spoilage of enclosed fresh produce.

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A sterilizable closure for food containers that allows effective sterilization of the closure interior before sealing the container. The closure has a unique design with minimal internal components to facilitate thorough penetration of sterilization agents like hydrogen peroxide vapor. This enables sterilization of the closure interior before attaching it to an open container, preventing contamination of the product. The closure can also hold an additional component like a tablet that mixes with the liquid food when consumed.

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Coating compositions for food and beverage packaging containers that do not contain extractible quantities of compounds like BPA, bisphenol A, styrene, or vinyl chloride. The coatings are made by using styrene-mimicking monomers containing cyclic groups and ethylenically-unsaturated pendant groups instead of styrene. These monomers provide similar properties to styrene but without the perceived health concerns. The coatings can be applied to metal containers like cans and are crosslinked to form a continuous barrier coating that prevents migration of contaminants into the food.

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A paperboard-based food container like a pizza box that prevents grease from the food from reaching the exterior of the container. The container has a food-contacting layer, an exterior layer, and an inner core layer made of grease-repellent paperboard. The core layer impedes migration of grease from the food through the container. This prevents the grease from reaching the exterior layer and contaminating the printed surface. The core layer can be corrugated paperboard with grease-repellent compounds added during manufacturing. The core layer is bonded between the food-contacting and exterior layers to create the container.

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High barrier transparent packaging bags for food with improved oxygen barrier properties compared to conventional high barrier films. The bags have a double-layer composite film with an alumina barrier film sandwiched between them. Both the composite films and the alumina barrier film are transparent. This allows the bags to isolate oxygen better than traditional high barrier films, extending the shelf life of packaged foods.

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Storing apple snacks in a modified atmosphere to preserve their quality and extend shelf life. The method involves vacuum packing the snacks in a rigid container, filling the container with a food gas mixture of CO2 and N2, and sealing it. This removes oxygen and prevents bacteria growth. An oxygen scavenger sachet is also included to absorb any residual oxygen. The container has multiple layers of cardboard, aluminum, and polyethylene to prevent moisture, light, and gas leakage.

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Storing apple snacks in a gaseous medium to preserve the original chemical composition and extend shelf life without oxygen. The method involves packing apple snacks in a light, gas-tight, moisture-proof package. Air is removed by vacuum and the package filled with a food gas mix of CO2 and N2 in ratios of 20-40% CO2 and 80-60% N2. This prevents oxidation, mold, fungus, and fermentation by inhibiting aerobic microbes and oxygen.

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Laminate for packaging sterilizable or hot-fill containers that prevents gas and acid penetration. The laminate has a core layer of paper/cardboard, an inner polypropylene coating, an aluminum barrier film, and an outer polypropylene coating. An additional acid-barrier layer made of materials like PET, PETG, PVOH, EVOH, or PA is added between the inner and outer coatings. This prevents acidic compounds from penetrating and weakening the bond between the aluminum and inner coating. The laminate is sealed into sterilizable containers to protect perishable foods.

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Biodegradable food packaging that provides a sufficient barrier against external gases for optimal food preservation while being fully biodegradable. The packaging consists of a layer made of biodegradable paper and an inner layer made of a heat seal lacquer. The paper layer is on the outside and the lacquer layer is in contact with the food. This allows the paper's breathability for gas exchange while the lacquer prevents contamination. The lacquer layer can be further sealed against the paper surface for additional gas barrier. This prevents spoilage without relying on non-biodegradable plastics.

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Fresh food container that uses modified atmosphere and vacuum sealing to extend the shelf life of perishable items. The container has an inner package with an air conditioning valve that allows controlled air flow to maintain a specific atmosphere inside. Multiple inner packages are held in a larger outer package with gas circulation grooves to facilitate vacuum sealing. This prevents bacterial growth and spoilage by regulating the oxygen and carbon dioxide levels around the food.

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Breathable structure for fresh food packaging that prevents cross-contamination, prevents moisture loss, and prevents food breakage. The packaging has multiple small breathing holes on one side with a separate breathable layer outside the holes. This allows gas exchange without direct vent holes, preventing contamination, moisture loss, and food breakage through the holes. The small hole size and separate layer prevent contamination, moisture loss, and food breakage through the holes.

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Packaging container for fruits and vegetables that maintains freshness better than conventional packaging. The container has a polymer film with specific opening sizes and shapes that allows controlled gas exchange while preventing foreign matter intrusion. The openings have lengths of 0.5-7 mm and widths less than 10 microns. This configuration allows oxygen permeability in a range of 500-50000 cc/m2/day/atm. The small openings prevent debris entry while still allowing gas exchange. The container also has a specific compound coating on the inner surface to inhibit bacteria growth. This combination of features enables better freshness retention of perishable foods like cut vegetables compared to conventional packaging.

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Packaging container for fresh produce that has controlled oxygen permeability and prevents contamination while still allowing degassing. The container has a polymer film with openings that are small enough to prevent foreign matter penetration but large enough to allow oxygen exchange. The openings are convex protrusions on the film with lengths of 0.5-7 mm and widths of 1 μm or less. This allows air flow through the film while preventing foreign particles from entering. The container maintains produce freshness by controlling oxygen levels without contamination risk during degassing.

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Packaging container with controlled gas permeability and reduced foreign matter entry for maintaining freshness of fruits and vegetables. The container has a polymer film with openings measuring 0.5-7 mm in length and less than 10 microns in width. This allows gas exchange for freshness preservation while preventing large particles from entering. The film has an oxygen permeability of 500-50000 cc/m2/day/atm. The specific opening dimensions balance gas permeability and foreign matter exclusion.

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A packaging bag for retort food preservation that prevents contamination of the food inside from ingredients of the bag itself. The bag has a dual structure with an inner packaging material film and an outer exfoliation film. The inner film has oxygen and vapor barrier properties. The outer film adheres to the inner film during sealing but can be easily peeled off after cooking. This prevents migration of ink and adhesive from the outer film into the food during long-term heating. The outer film has a light blocking effect to preserve quality.

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