UV Light Barriers for Food Packaging Protection

Hollow spherical particles made from lignin, a natural polymer found in plant cell walls. The lignin used is isolated from biomass using a specific process involving organic acids and peracids. The isolated lignin has a high content of a specific ether bond (β-O-4) and solubility in ethanol. This lignin self-assembles into hollow spherical particles. The particles have long-wavelength fluorescence due to intermolecular associations. They can be used as safer and easier-to-prepare alternatives to synthetic hollow particles. Applications include UV absorbers, light resistance agents, and drug encapsulation.

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Sustainable reuse of opaque plastic waste from used milk bottles to create new milk bottles. The method involves shredding and recycling opaque milk bottle plastic, then incorporating it into the middle layer of new milk bottles. The opaque middle layer provides light blockage to preserve vitamins in the milk. The outer and inner layers are white. This allows using opaque recycled plastic without issues like contamination or appearance. The opaque middle layer has less than 5% light transmission.

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The new generation of food packaging should not only be biodegradable, but also provide additional protective properties for packaged products, extending their shelf life. In this paper, we present the results research on cast-extruded poly(butylene succinate) (PBS) films coated with hydroxypropyl methylcellulose (HPMC) modified CO2 extract from sea buckthorn (ES) or its ethosomes (ET) at amounts 1 5 pph per HPMC. addition, developed were exposed to accelerated aging (UV radiation and elevated temperature) determine effect films properties. Based SEM, it can concluded that in uncovering coatings bulk. GPC showed a decrease molecular weight PBS after treatment, additionally amplified by presence However, addition ES ET low concentrations reduced level polyester degradation. coating treatment increased oxygen barrier (a 324 cm3/m2 24 h neat 208 ET5). Despite colored coating, color differences compared imperceptible (E < 1). combination resulted complete inhibition growth E. coli S. aureus, which was observed non-aged samples. obtained demonstrate an improvement bioactive ... Read More

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Thin film coatings for protecting light-sensitive substances in containers from degradation caused by incident light. The coatings are deposited using atomic layer deposition (ALD) on the container surfaces. The coatings are designed to absorb or reflect specific wavelengths of light that would otherwise deteriorate the contents. The coating thickness is determined based on the refractive index of the material at the incident light wavelength. This allows customization of the coating optical properties for specific applications.

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Abstract Covalent organic frameworks (COFs) have garnered significant interest for applications in photocatalysis, energy storage, gas storage/separation, and optoelectronics, yet achieving highquality COF films with high UVshielding properties still remains a challenge. In this study, transparent are successfully developed revealed their remarkable capability: effectively blocking 99.9% of UV light while maintaining over 96% visible transmittance. Under irradiation, the backbone undergoes structural rearrangements between hydrazo (CNN) azo (CNN) configurations, leading to electronic redistributions enhanced conjugation within framework. This adaptable framework efficiently absorbs dissipates through nonradiative pathways, providing UVblocking that dramatically reduce photooxidation rates edible oils by up 16.9fold compared uncoated controls. Additionally, superior photostability these makes them promising nextgeneration UVprotective materials safeguarding sensitive equipment highUV environments, such as highaltitude, polar, extraterrestrial set... Read More

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By shielding food from chemical, microbiological, and physical harm, proper packaging helps ensure that customers receive secure clean food. A vital relationship between manufacturers their is packaging; if done incorrectly, the items lose quality consumers become less trusting. The sector highly aware of customer expectations due to recent trends in lifestyle change; as a result, industry must either evolve or remain stagnant. This circumstance has made it extremely difficult for develop novel methods. These days, most promising topics technical development are innovative methods including aseptic, nano, active, bioactive, intelligent purposefully connected items. Technological developments may help keep spoiling by delaying ripening, oxygenation, water penetration, ultraviolet interactions. doing this, supports peoples personalized lifestyles meet demands across supply chain. chapter reviews different techniques role nanotechnology packaging.

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Abstract Food preservation is a significant challenge due to the susceptibility of food spoilage from microbial contamination, moisture, and exposure air light. This research focuses on development chitosanbased composite films for potential applications in storage. Chitosan/clay were prepared by incorporating varying clay loadings utilizing polyvinyl alcohol as crosslinker. The via solution casting method. swelling properties assessed with respect different concentrations. Their antimicrobial activity was tested against both Grampositive Gramnegative bacteria. Characterization techniques such FTIR, UVvisible spectroscopy, XRD, SEM employed analyze films, confirming smoother surface homogeneous dispersion kaolin. Biodegradation tests demonstrated strong mechanical strength films. applicability these systematically evaluated. Results indicated that 9% kaolin/chitosan/PVA film provided effective preservation, only 4.5%, 70%, 50% weight loss packaged apples, capsicum, strawberries, respectively, compared 9.5%, 90%, 98% unpackaged samples. These findings confirm are efficient... Read More

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Four natural bioactive compounds with UV-absorbing properties curcumin, quercetin, caffeic acid, and hymecromone were incorporated into pectin-based coatings deposited on oriented polypropylene (OPP) to develop packaging films UV-shielding capabilities. The effects of both (used individually or in combination) coating thickness (d = 0.12 1.2 um) the optical (UV-Vis transmittance haze) coated OPP samples investigated. Coating deposition enhanced UV-barrier relation type compound, following order: acid > curcumin quercetin. Regardless compound used, no significant changes observed clarity haze OPP. Additionally, a greater resulted lower UV-light PP films. Although combination did not exhibit synergistic effect, it demonstrated an additive benefit, effectively broadening wavelength range UV protection final materials. While this study highlights that performance gap remains compared commercially-available materials, underscores potential replacing synthetic additives through technologies rather than masterbatch incorporation.

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The escalating global threat of ultraviolet (UV) radiation is manifested through multifaceted damage pathways including cutaneous carcinogenesis, photodegradation organic substrates, marine ecosystem destabilization, and infrastructure weathering. These urgent challenges have catalyzed sustained interdisciplinary efforts toward advanced UV-shielding technologies spanning biomedical, environmental, industrial domains. Current material arsenals include melanin, lignin, tannin, polydopamine, zinc oxide titanium dioxide, etc. materials can be applied to diverse fields such as food packaging, sunscreen fabrics, creams, eyeglasses, films tailored processing techniques employing distinct photoprotective mechanisms. Notwithstanding significant progress, the development an integrated selection framework that reconciles efficiency, durability, environmental compatibility persists a critical knowledge gap. In this context, main mechanisms various types UV shielding their applications in different are described systematically. Subsequently, comparative analysis advantages shortcomings presented,... Read More

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In this study, hazelnut shell-based vegetable carbon black (HCB) was synthesized from renewable agricultural waste and incorporated into chitosan (CS) gelatin (GEL) matrices to fabricate active packaging films. The structure of HCB characterized, the structure, physicochemical properties, antibacterial activity, ultraviolet resistance, functional performance CS-GEL-HCB films with varying contents (0, 1, 5, 9 wt% based on GEL) were systematically investigated. FT-IR results revealed that intermolecular hydrogen bonds formed between CS GEL. showed tensile strength CS-GEL film (15.83 0.40~32.06 0.61 MPa), as well its water vapor oxygen barrier properties (0.55 0.03~0.15 0.02 g/dm2), UV-visible light significantly improved (p < 0.05) after addition HCB, while permeability, moisture content, solubility effectively reduced (24.84 0.45~20.10 0.45%). More importantly, exhibited enhanced which helped delay oxidation deterioration oil sample during accelerated test. These suggest could serve an effective food material improve stability soybean in industry, showing great potential maint... Read More

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ABSTRACT Exposure of foods to ultraviolet (UV) radiation during processing, storage, and retail display can result in quality deterioration, reduced shelf life nutritional value, potential food safety issues. The use UVblocking packaging is an effective strategy minimize these harmful effects. Carbon dots (CDs) are a class carbonbased nanomaterials that have emerged as promising candidates for enhancing the performance biopolymerbased films coatings. Their unique advantages excellent UV absorption ability combined with their low toxicity, biocompatibility, facile production from sustainable precursors make CDs superior alternatives traditional agents. Incorporating into biopolymers significantly enhance protection without compromising transparency packaging, thereby maintaining visual appeal packaged product. In addition protection, confer multifunctionality systems by imparting antioxidant, antimicrobial, pHresponsive properties, meeting demand intelligent solutions. These advancements not only protect photodegradation but also address broader issues through active respo... Read More

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Fruit spoilage caused by oxidation and microbial infection exacerbates resource wastage. Although starch films including chitosan possessed admirable biocompatibility owing to great biodegradability compared with conventional plastics, deficient antibacterial antioxidant capacity restricted food shelf life. Herein, an environmentally friendly film (CS/G-CDs) was constructed carbon dots derived from Cirsii Herba (CDs), which formed through high affinity resulting hydrogen bonding between molecules hydroxyl originating CDs. The prepared CDs presented homogeneous monodisperse spherical structures ultrasmall size, providing favorable conditions for uniform formation. Encouragingly, the of CS/G-CDs increased 5.00-fold, followed rate up 97.0%. Dramatically, revealed glorious UV shielding efficacy (99.9% UVB 98.2% UVA), its preservation time blueberries remarkably extended 8 days longer than that film. Overall, Chinese herb-derived exhibited magnified antibacterial/antioxidant properties biocompatibility, provided a promising strategy sustainable development packaging materials.

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Packaging film for protecting light-sensitive materials that blocks UV light while allowing visible light transmission. The film has multiple ultra-thin layers with an average thickness of less than 500 nm. The film has a sharp bandedge between UV and visible light ranges. The UV transmission is less than 15% while visible light transmission is greater than 70%. The bandedge slope is greater than 3%/nm. This provides effective UV blocking and visual inspection without color shifts.

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Food packaging film with a light-shielding structure to prevent food deterioration from light exposure during transportation and storage. The film has a base layer, a first light-shielding layer, a second light-shielding layer, bubble films connected to the light layers, and ventilation holes. The light layers block light from reaching the food, the bubble films provide cushioning, the ventilation holes allow airflow, and printing and antimicrobial layers can be added. This balances protection against light, cushioning, airflow, and functionality like printing and antimicrobials.

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A light-blocking packaging blank for food containers that replaces aluminum foil to reduce carbon emissions while maintaining oxygen barrier properties. The blank consists of a sequence of layers: a first PE layer, a base paper layer (optional), a high barrier film, a second PE layer, and a fourth PE layer. The high barrier film and second PE layer are bonded together using an adhesive layer. The base paper layer has indentations on both sides. The second PE layer contains color masterbatch. This structure provides light-blocking properties comparable to aluminum foil while using less material. The high barrier film and base paper indentations improve oxygen barrier properties.

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Protective starch-based film with long-term bacteriostasis and ultraviolet shielding properties for food packaging. The film is made by self-assembly of metallic polyphenol coated zinc oxide nanoparticles and self-polymerization of a melanin-like precursor with starch. The metallic polyphenol nanoparticles provide antibacterial activity, ultraviolet shielding, and mechanical strength. The melanin-like precursor crosslinks the starch and nanoparticles into a network. The film has high ultraviolet shielding, bacteriostasis, and transparency compared to conventional packaging materials.

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Composite polyvinyl alcohol preservative film with low luminous transmittance for light-proof packaging of fruits and vegetables to prevent spoilage and discoloration. The film contains modified silicon dioxide nanoparticles dispersed in a polyvinyl alcohol solution. The modified silicon dioxide nanoparticles have a particle size range of 200-1000 nm. This composite film provides better light-blocking properties compared to pure polyvinyl alcohol film due to the nanoparticles scattering light. The nanoparticles also improve film compactness. The modified silicon dioxide is made by reacting silicon dioxide with a silane compound in toluene, then acid treating. The composite film is prepared by dissolving polyvinyl alcohol in acid, adding the nanoparticles, antimicrobial, and stirring before defoaming

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Active and intelligent food packaging made by grafting curcumin onto polypropylene using reactive extrusion. The curcumin is covalently bound to the polymer backbone to prevent migration. The curcumin in the packaging material provides antioxidant and radical scavenging properties to prevent food spoilage. The packaging also changes color in the presence of ammonia, indicating spoilage. The curcumin-grafted polypropylene has improved UV barrier properties compared to native polypropylene. The reactive extrusion method allows scalable production of the active and intelligent packaging.

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Edible coatings for protecting foods like fruits, vegetables, and processed foods from moisture loss, UV damage, and nutrient leaching. The coatings are made from nanocellulose and nano calcium carbonate. The coatings are edible, transparent, and provide barrier properties against water, gases, and UV light. They prevent moisture loss, prevent UV damage, and prevent nutrient leaching in fruits and vegetables. The coatings can be applied before or after harvest to mitigate post-harvest damage. The coatings can also be used to protect frozen foods from drip loss during thawing.

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A photo-oxygen barrier for packaging materials that protects light and oxygen sensitive products like food, beverages, medications, and cosmetics. The barrier is a composite material containing 1-65% of a light-blocking composition, 1-30% of an active oxygen absorber, and 5-98% of a base material. The light-blocking composition can contain titanium dioxide, aluminum powder, and carbon black. The active oxygen absorber contains cobalt. The barrier can be made by melt extrusion or mixing the components in a base material.

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Light barrier compositions for packaging materials that provide better light protection for sensitive products like milk without sacrificing visual appearance. The compositions contain a blend of polyethylene terephthalate (PET) with other polymers like polypropylene (PP), polylactic acid (PLA), and polymers with heteroatoms like nitrogen, oxygen, sulfur, and halogen. The blends have low light transmission in the UV and visible range below 1.5%. The compositions can be used in container walls or preforms to protect packaged products from light degradation without compromising visual appeal.

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A recyclable high barrier cellulosic structure for forming cellulosic containers that can resist oxygen, moisture, and light penetration. The structure includes a cellulosic board substrate, a metal oxide layer on the substrate, and a tie layer between them. The cellulosic board substrate has low average and maximum transmittance in the UV-visible light spectrum. The metal oxide layer provides additional barrier properties. The tie layer connects the substrate and metal oxide layer. The structure can be used to form containers like paper-based food packaging.

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Bacterial nanocellulose transparent film with barrier properties for packaging applications. The film is made by electron beam irradiating and mechanically treating wet bacterial cellulose to form nanocellulose fibers with carboxyl groups. The fibers are then filtered and dried into a multilayer structure. Alkali treatment and bleaching further improve properties. The film provides oxygen, moisture, and UV barriers.

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UV-protective sleeve for mason jars and other containers to prevent light-sensitive products from being degraded by UV rays when stored in bright areas. The sleeve has a laminated construction with an outer neoprene layer for insulation, a middle Mylar layer to block UV light, and an inner rubber layer for jar grip. The sleeve covers the jar sidewalls and has a pocket for labels. It provides UV protection, insulation, and jar retention without obstructing access.

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Packaging material with improved barrier resistance to gases, liquids, and UV light using graphene-reinforced polymers. The packaging material is made by exfoliating graphite particles in a molten polymer using shear forces. This converts the graphite into graphene nanoparticles dispersed in the polymer matrix. The graphene-polymer composite has significantly enhanced barrier properties compared to unreinforced polymers. The graphene nanoparticles provide tortuous paths for permeants, strong bonding with the polymer, and reduced gaps between particles. This improves barrier resistance to gases like oxygen, carbon dioxide, and liquids like water.

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Light barrier compositions for packaging materials that block UV and visible light to protect packaged foods from degradation. The compositions contain polyethylene terephthalate (PET) along with selected other polymers like polypropylene (PP), polylactic acid (PLA), or polymers with heteroatoms like nitrogen, oxygen, sulfur, or halogen. The specific polymer blends have low transmittance in the 400-700 nm range to block UV and visible light. The compositions can be used in containers, preforms, and walls to provide light barrier properties without sacrificing visual appeal.

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Adhesive packaging material with light-shielding and oxygen-blocking properties for protecting sensitive products like food, medicine, and chemicals from degradation caused by light and oxygen. The packaging material consists of three layers: an outer printing layer, a middle layer with leather fiber and white masterbatch, and an inner black layer. The white outer layer provides moisture resistance and light blocking. The middle layer covers the inner layer and has the leather fiber and white masterbatch to block light and moisture. The inner layer is black to block light and provide oxygen barrier.

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Method for quantifying the photoprotective performance of complete packaged products like foods and beverages by exposing them to controlled light conditions. The method involves placing filled packages inside a specialized light exposure chamber that can maintain consistent temperature and humidity. The packages are monitored as they are exposed to defined light doses to determine how well the contents retain quality and stability under accelerated light aging. This allows quantifying the photoprotective performance of the entire packaged system, including the container and label, versus just the product. The chambers also have instruments to monitor light intensity, temperature, and humidity during the exposures.

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Preforms and containers for packaging consumables like milk that block light to prevent degradation. The containers and preforms contain a cyclic olefin copolymer (COC) along with a polyester like PET. The COC provides high light blockage while the polyester forms the bulk of the container. The COC prevents light transmission by scattering it internally. The COC also improves clarity compared to adding dark pigments to the polyester. The containers have an opaque white appearance without compromising recyclability.

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Bifuran copolyesters with UV blocking properties for transparent food and beverage packaging. The copolyesters contain bifuran units derived from a bifuran dicarboxylic acid, along with other dicarboxylic acid and diol monomers. The bifuran units provide UV absorbance in the 300-400 nm range, making the copolyesters transparent with low UV transmission. The bifuran copolyesters can be prepared by melt polycondensation of the monomers.

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Chicken essence aluminized packaging with reduced UV transmission to prevent oxidation and spoilage of the high-fat chicken flavoring. The packaging has multiple UV absorbing adhesive layers between the BOPP, aluminum, and PE layers. This sandwich of UV blocking layers improves UV resistance compared to just an aluminum coating. The UV absorbing adhesives help prevent light-induced oxidation of the chicken essence, preventing flavor degradation and shelf life issues.

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Packaging material for light-sensitive products that has a light barrier over orifices like straw holes to prevent degradation. The packaging has a layer covering the hole with a paint containing carbon black or titanium dioxide to block light transmission. This light barrier can be applied to the exterior of the second layer covering the hole. This allows mass production of packaging with light barrier orifices using conventional equipment without adding aluminum foil. The paint can be applied before or after the wrapping is made.

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Composite sheet for packaging room temperature cheese that extends the shelf life of cheese products by improving barrier properties against oxygen and light. The composite sheet has a surface layer made of PET, a middle support layer of PS, and an inner layer of a multi-layer co-polymer of ethylene and ethylene-vinyl alcohol. The middle and inner layers are modified to reduce oxygen and light transmission below thresholds that preserve cheese quality at room temperature. The modified layers provide barrier against oxidation and deterioration from light, extending cheese shelf life without refrigeration.

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Packaging material with tailored moisture, gas, oil, and light barrier properties using aqueous coatings applied directly onto the substrate. The packaging has multiple barrier layers formed by drying aqueous coatings instead of extrusion or lamination steps. The coatings can include acrylic latex, polyvinyl alcohol, polyurethane, or polyolefin dispersions. The layered coating configuration provides desired barrier and light shielding properties without adding complexity or cost from additional layers.

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Light barrier compositions for packaging applications that provide high UV and visible light blocking properties while having lower densities compared to PET-only packaging. The compositions contain PET blended with other polymers like polypropylene (PP), polylactic acid (PLA), and carbon-based polymers. The specific blends have less than 1.5% transmittance from 400-700 nm, enabling blocking of UV and visible light that degrades packaged products. The blends also have lower densities than PET-only compositions with the same light blocking properties.

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Packaging film for light blocking that can maintain the inherent quality of food for a long time without changing the quality of food such as rancidity and off-flavor. The film includes riboflavin, chlorophyll, or myoglobin, which are natural photosensitizers, specifically, to block visible and ultraviolet rays, and to have antimicrobial activity.

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Packaging with a high lightness value, high light blocking, a low percentage of additives, and a goniochromatic appearance (uniform color across all viewing angles). The packaging material is a composite containing a polyester, polymethylpentene, and a light scattering pigment. When subjected to orientation stress, it forms a bright white package wall with high light barrier and consistent color appearance from all angles. The composition has a low loading of polymethylpentene and light scattering pigment, allowing high lightness without the trade-offs of opacifiers.

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Edible oil packaging bottle that blocks UV light and extends shelf life by using a composite material made of nano silica, chitosan, soy protein isolate, rosemary extract, and polylactic acid. The nano silica absorbs UV light to protect the oil, chitosan and soy protein isolate form a barrier, rosemary extract prevents oxidation, and polylactic acid shapes the bottle.

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Packaging system for dairy products like yogurt that protects the product from light to prevent off-flavors but allows visibility of the interior. The packaging has a translucent material that blocks visible light in the wavelength range of 415-455 nm which is known to cause light-induced off-flavors in dairy products. However, the packaging is still translucent to allow some visible light in the 780-390 nm range that does not cause off-flavors. This allows customers to see inside the package while preventing light absorption that could spoil the product.

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Packaging material to protect light-sensitive substances like food from photooxidation by enhancing their light protection. The packaging material contains specific ratios of calcium carbonate and titanium dioxide fillers in the polymer matrix. The key finding is that using a specific ratio of calcium carbonate (CaCO3) to titanium dioxide (TiO2) in the packaging material provides better light protection compared to using only TiO2 or only CaCO3. The preferred ratio is 4.5:1 (CaCO3:TiO2) for light protection factors (LPF) greater than 60. This ratio provides unexpectedly high LPF values compared to using only TiO2 or only CaCO3.

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A high-performance beverage packaging bag with extended freshness shelf life by preventing light from degrading the beverage inside. The bag has a base layer, barrier layers on either side, and a surface layer. At least one of the barrier layers is a light barrier layer to block external light from reaching the beverage and deteriorating it. This prevents light-sensitive compounds from breaking down and preserves the freshness of the beverage inside the bag.

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UV blocking film for food packaging materials that provides long-term protection against light degradation without affecting the transparency or appearance of the packaging. The film contains a barrier layer with a natural product like carotenoids and a UV absorbing compound. This allows blocking of UV light without making the packaging opaque. The natural product provides oxygen and moisture barrier properties. The film can be produced by coating a composition containing the barrier layer components onto a base substrate.

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A transparent packaging material with UV and water vapor barrier properties for preventing quality deterioration of packaged products. The packaging material has a transparent polymer film, an adhesive layer, a UV-blocking coating layer, a printing layer, and a transparent deposited polyester film. The UV-blocking coating layer contains a sunscreen compound like benzotriazole. The transparent deposited polyester film has reduced graphene oxide to further block water vapor. This packaging material allows viewing the contents while preventing quality deterioration due to UV and moisture.

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Monolayer food packaging with superior light protection to prevent degradation of sensitive contents like dairy products. The packaging has a single layer container and closure made with light-blocking materials like titanium dioxide particles and color pigments. The monolayer design provides complete light protection throughout the package by avoiding any uncovered areas that can allow light ingress. The closure top has a thicker section to compensate for injection molding processing challenges. The monolayer containers and closures have light protection factors of 20 or greater.

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A multilayer food packaging film that blocks UV without transferring additives to the food. The film has a layer containing zinc oxide with specific particle size and transmittance properties. The zinc oxide layer blocks 20% or less UV at 350nm and 60% or more UV at 550nm. This prevents UV degradation of packaged food without transferring UV absorbers to the food. The film structure includes layers like seal, seal adjacent, and outermost layers for properties like pinhole resistance and oxygen barrier.

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Light-shielding barrier laminate for packaging of food and other products that provides improved light-blocking properties while reducing material use compared to traditional three-layer laminates. The laminate consists of a light-shielding sealant film laminated onto a transparent gas barrier film. The transparent gas barrier film has an inorganic oxide vapor deposition film sandwiched between it and an adhesive layer. The light-shielding sealant film has an aluminum vapor deposition film on one side. This laminate structure provides light-blocking, gas barrier, and moisture barrier properties for packaging of light-sensitive products like powders and granules.

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Monolayer packaging for light-sensitive products that provides superior light protection without sacrificing mechanical properties. The packaging is made by dispersing treated titanium dioxide (TiO2) particles and colored pigments like yellow or black in a polymer melt. The TiO2 provides light protection while the colored pigments enhance LPF values. The monolayer packaging has LPF values over 20, preventing photo-degradation. It can be produced by blow molding or injection molding. The treated TiO2 particles are coated with alumina and an organic layer for dispersion in the polymer.

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Light-blocking food packaging film containing natural photosensitizers like riboflavin, chlorophyll, or myoglobin to prevent light-induced food spoilage. The film blocks both UV and visible light, as well as having antimicrobial properties. It contains a polymer resin and the photosensitizer is mixed and extruded to create the film. This provides a natural alternative to traditional UV absorbers in packaging materials for foods prone to light degradation like dairy and oils.

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High-toughness oxygen- and light-proof packaging bags that have improved oxygen barrier and light blocking properties compared to single-layer or composite bags. The bags have a sandwich structure with two co-extruded PE layers around a PVDC coating layer and a metal layer. The inner and outer PE layers provide strength and tear resistance, while the PVDC coating prevents oxygen permeation and the metal layer blocks light. This multi-layer construction provides superior oxygen barrier, light shielding, and durability compared to single-layer or composite bags.

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High-barrier anti-ultraviolet packaging bag to extend the shelf life of vacuum-packaged food and reduce food waste by preventing ultraviolet radiation from deteriorating food inside the bag. The bag has a multi-layer structure with UV-blocking adhesive layers sandwiched between BOPA and PE films. This inner bag is then enclosed by an outer bag with vertical pillars to provide rigidity. The inner and outer bags are sealed together with protrusions and grooves. The UV-blocking adhesive layers prevent UV from penetrating the bag and reaching the food inside.

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