Property Blending for Packaging Materials

Hybrid clamshell container for packaging products that has a base made of a cellulosic material like paperboard and a cover made of a plastic material. The container has a hinged lid that folds over and clips to the sides in the closed position. This allows the strength and recyclability benefits of paperboard for the base while using plastic for the cover to improve durability and stackability. The container can be formed by manipulating a blank with separate paperboard and plastic components that join together.

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Stretched film containing a specific blend of two polyamide resins that provides excellent transparency and prevents irregular reflection. The film has a polyamide resin (a1) with diamine and dicarboxylic acid units, 70 mol % derived from xylylenediamine and sebacic acid, blended with a polyamide resin (a2) containing 35 mol % linear alkylene units. The blended film has a mass ratio of (a1) to (a2) from 5/95 to 30/70. This composition allows the (a1) resin to disperse well in (a2) to prevent light scattering. The film can further have a barrier layer with similar (a1) chemistry and the barrier and stretched film should be stretched at the same ratio.

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Adhesive structure for packaging boxes that improves adhesion strength between side plates by using different adhesives with complementary properties. The structure involves two adhesive types, like hot melt and water-based emulsion, applied side by side on the side plate folding surfaces. An adhesive hole is formed between the adhesive sections. The holes are filled with either adhesive type to increase adhesion area. This leverages the advantages of each adhesive type, like heat resistance vs water resistance, while mitigating their weaknesses.

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Two-component curing adhesive composition for laminating films and packaging materials that is safer, recyclable, and biodegradable compared to traditional reactive adhesives. The adhesive uses an oil or fat containing an acid anhydride group as the adhesive component and a curing agent containing an acid-modified polyol and an amine compound. The acid anhydride groups in the oil react with the hydroxyl groups in the polyol to cure the adhesive. The curing agent amine catalyzes the reaction and improves curing speed. The oil component allows recyclability and biodegradability compared to traditional reactive adhesives.

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Packaging film for bags and pouches that has improved anti-blocking properties to prevent sticking and clogging. The film has one surface with a roughness of 1-10 microns due to blending iron powder into the propylene resin. This roughness reduces friction and prevents sticking compared to smooth surfaces. The iron powder also absorbs oxygen to improve barrier properties. The rough surface can be formed by blending iron powder into the resin at 1-40% mass.

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Sealant film for packaging applications that enables recycling of mixed resin materials. The film has a layer containing recycled material with two or more resin types, followed by a separate sealant layer. The recycled layer has small, localized regions with lower transmission compared to the surrounding. These regions have maximum area and aspect ratio limits to prevent clumping. This allows recycling mixed resins while maintaining sealant and mechanical properties.

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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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Polypropylene-based packaging material with improved drop impact resistance, blocking resistance, slipperiness, and flavor barrier properties for food packaging applications. The packaging material contains an ethylene-propylene block copolymer with a unique phase dispersion structure. The copolymer has a matrix of propylene-based polymer and spindle-shaped domains made of propylene-based elastomer. The spindle shape provides optimal properties like drop impact resistance, blocking resistance, and slipperiness while avoiding issues like poor flavor barrier or appearance.

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Non-oriented film for heat seal packaging applications that balances low-temperature sealing properties and heat seal strength. The film has a sealant layer containing propylene-based polymer (A) with melting point 120-170°C and an optional copolymer (B) with lower melting point. The substrate layer has propylene-based polymer (C) with lower melting point. This composition allows the film to form laminated structures with good low-temp sealability and heat seal strength. The films can be used in mono-material packaging without deteriorating substrate heat resistance.

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Biaxially stretched polyamide film with improved properties for food packaging and alcohol evaporants. The film has a specific composition and structure to balance properties like bending pinhole resistance, puncture strength, dimensional stability, and ethanol penetration. It contains polyamide 6 as the main component, with dispersed particles of a resin like PBAT, PEE, or POE having a maximum diameter of 1 μm or more. This provides plane alignment and crystallization parameters that enhance performance.

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A multilayer biodegradable film with improved uniformity, flexibility, and noise level compared to existing biodegradable films. The film has alternating layers of a polylactic acid-based polymer and an aliphatic polyester or aliphatic-aromatic copolymerized polyester. The uniformity of the polylactic acid layers is optimized to 0.2 μm or less. This reduces thickness variations between layers. The film has good balance of properties like flexibility, transparency, and noise level compared to films with only polylactic acid layers. It also has better interlayer adhesion and processing.

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A masterbatch for blending PET and PEF resins that enables stable blend molding of PET and PEF without prolonging molding time and achieving fine quality of the resulting molded object. The masterbatch contains a high concentration of PEF as an additive to PET, with specific proportions and intrinsic viscosities. This allows compatibilization of the PET and PEF during processing and avoids quality issues like whitening or strain hardening when blending the resins directly. The masterbatch composition is: PET:PEF ratio of 90:10 mass% or less, and intrinsic viscosity of PEF of 0.50-1.20 dl/g.

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Sheet for press-through packaging, like for medicine blisters, with improved properties for environmental friendliness and manufacturing ease. The sheet contains vinyl chloride resin, biomass resin, and a plasticizer. It has a specific storage modulus range of 1-2.6 GPa at 30°C. The biomass resin is a butylene succinate like polybutylene succinate. The plasticizer is epoxidized vegetable oil like epoxidized soybean oil. The vinyl chloride resin has low chlorine content. This composition allows manufacturing press-through packages with biomass content over 10% and reduced bleeding of plasticizers during production.

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Packaging film with improved anti-blocking properties for preventing sticking and clogging of filled pouches. The film has at least one surface with a roughness in the range of 1.0 to 10 μm. This roughness is achieved by blending iron powder into the propylene-based resin layer forming that surface. The iron powder not only improves anti-blocking but also provides oxygen barrier properties. Blending iron powder into the resin layer forms a rough surface with a small friction coefficient that prevents sticking.

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Resin composition, film, laminated film, and packaging material with improved balance between easy-opening properties and low-temperature heat sealability. The composition contains 5-30% of a butene polymer, 30-55% high-pressure LDPE, and 30-45% ethylene-α-olefin copolymer with specific properties. The mass ratio of LDPE to copolymer is 40:60 to 59:41. The butene polymer has a melting point of 100-130°C, low melt flow rate, and high proportion of low molecular weight components. The composition provides a film with good easy-opening and low-temp sealability over a wide temperature range.

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Polyester resin composition for films with improved barrier properties and mechanical strength compared to traditional polyethylene terephthalate (PET) resins. The composition contains a furandicarboxylic acid-based polyester resin (A) and a thermoplastic elastomer (B) containing isophthalic acid, tetramethylene glycol, and butadiene units. The thermoplastic elastomer has specific storage modulus and loss tangent properties at low temperatures. The composition provides balance between barrier properties and mechanical strength for films used in packaging applications.

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A process for making biodegradable packaging materials from waste jute bags that has enhanced mechanical strength, water absorption, flame and heat resistance, low thermal conductivity, and high reflectance. The process involves delignifying the waste jute, phosphorylating it, washing, drying, and further treatments like homogenization, sonication, freezing, and lyophilization to modify the jute fiber properties. This results in biodegradable packaging materials with improved functionalities like water absorption, flame retardancy, and low thermal conductivity compared to unmodified jute bags.

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Blow molded bottle container with improved thin-wall thickness, drawdown resistance, and burr removal properties. The container has a specific ratio of bio-based polyethylene, high density polyethylene, and linear low density polyethylene. The ratio of bio-based polyethylene to total polyethylene is 20-50%. The ratio of (bio-based + high density):linear low density polyethylene is 40:60 to 60:40. This composition allows thin-walled containers with reduced deformation and burr retention compared to conventional containers. The thin-walled containers have better drawdown resistance and easier burr removal during molding.

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Propylene-based polymer composition for biaxially stretched films that have improved dimensional stability at high temperatures compared to traditional propylene-based films. The composition contains two or more propylene-based polymers with specific molecular weight distributions. The composition can be used to make biaxially stretched films with reduced shrinkage at elevated temperatures. These films have applications in packaging where high temperature resistance is desired. The composition and films exhibit improved heat resistance without sacrificing other properties like clarity, strength, or processability.

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Hybrid biocomposite film for food packaging that combines whey protein isolate, chitosan, and silica to improve properties like strength and antibacterial activity. The film consists of a whey protein isolate matrix with added chitosan and silica fillers. The chitosan provides antimicrobial properties while the silica increases strength. The composite films have higher tensile strength and elongation compared to the whey protein isolate film. The chitosan concentration of 1.5% and silica concentration of 5% provide optimal antibacterial properties against E. coli.

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Degradable plastic bottle made from a unique blend of biodegradable polymers that improves the mechanical properties and barrier performance compared to existing degradable bottles. The bottle is blow molded from a resin mixture containing PLA, PBAT, PPC, PGA, and calcium carbonate. The PPC and PGA polymers enhance the crystallinity of the PLA, improving its strength and barrier properties. The degradable bottle can hold pesticides without leaching solvents due to the higher crystallinity PLA.

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A sealant film for packaging applications that provides both excellent heat resistance and low temperature sealability while being a polypropylene-based film. The sealant film has a first layer containing specific ratios of propylene homopolymer, propylene-ethylene random copolymer, and a specific ethylene-olefin copolymer elastomer. This composition allows the film to withstand high temperatures for sterilization like retort treatment and also seal at lower temperatures for packaging applications.

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Multilayer polypropylene film for packaging applications that balances heat resistance, transparency, and anti-blocking properties. The film has an outer layer with specific proportions of propylene homopolymer and propylene-ethylene random copolymer, along with an anti-blocking agent. This outer layer provides good sealing and anti-blocking. The inner layer has a higher proportion of propylene-ethylene block copolymer and ethylene-propylene elastomer. This inner layer provides heat resistance. The film structure allows retort packaging of food items while maintaining visibility and avoiding blocking issues.

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Stretched film containing a specific blend of polyamide resins to improve transparency. The film has a polyamide resin (a1) with 70 mol% of xylylenediamine-derived units and 70 mol% of sebacic acid-derived units, and a polyamide resin (a2) with 35 mol% of linear alkylene-derived units. The blend ratio is 5-30 wt% (a1) : 95-70 wt% (a2). This composition allows the (a1) resin to disperse well in (a2) and prevents irregular reflection. The film can be uniaxially or biaxially stretched. The improved transparency is useful in packaging materials like films and multilayer films.

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Hot melt self-adhesive composition for resealable packaging with improved adhesive properties and quality of rupture. The composition contains specific ratios of tackifying resins and styrenic block copolymers. The tackifying resin is a non-hydrogenated tackifier derived from aliphatic hydrocarbons like C9 aromatic hydrocarbons. The composition also has a C2/C4 copolymer with >80% C2 content and a C2/C3/C4 copolymer. The composition is used in multilayer films for resealable packaging with improved adhesion, sealing, and rupture characteristics.

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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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Packaging blends for clear PET bottles that can be recycled into clear PET without degrading quality. The blends contain a polyester like PET and a second polymer that forms a separate glass transition temperature. This prevents the second polymer from interfering with PET recycling. The blends can have high haze or opacity for opaque packaging. To recycle, the blends are treated to reduce opacity and transesterify the second polymer into the PET. This converts back to clear PET for recycling.

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Laminate, film, and packaging material with wide heat-sealable temperature range and high gas permeability. The laminate has a base layer with high content of 4-methyl-1-pentene polymer and a sealant layer with very high 4-methyl-1-pentene polymer content. The melting point of the base layer and the higher of the sealant layer's melting point or glass transition temperature differ by 5°C or less. This configuration provides a laminate with a wide sealing temperature range and the excellent gas permeability of 4-methyl-1-pentene polymers. The laminate, film, and packaging material find uses in applications like tapes, adhesives, bags, and packaging for fresh food, batteries, and cell culture.

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A biomass-derived polymer for making lightweight, porous materials like sheets and bottles with improved properties for applications like display screens and packaging. The polymer is a biomass-derived 4-methyl-1-pentene polymer that is blended with a polyester resin. The polymer has a specific composition with 30-100 mol % 4-methyl-1-pentene units derived from biomass and 0-70 mol % units from other α-olefins. The blended resin can be processed into porous sheets or bottles with voids by stretching or blow molding. The biomass-derived polymer provides mechanical strength, light scattering, and biodegradability compared to fossil-based polymers.

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Producing a printable, multi-layer liner web for packaging with improved print quality and sustainability. The method involves making a printable packaging liner with a white, printable top layer by combining bleached and unbleached pulps. The process is: 1) Make a bleached pulp for the top layer. 2) Make an unbleached pulp for the bottom layer. 3) Form the top layer from the bleached pulp. 4) Form the bottom layer from the unbleached pulp. 5) Assemble the layers into the final liner web. The unbleached bottom layer prevents contaminants from transferring to the top layer, maintaining white print quality.

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Multilayer films with good gas barrier properties, bending resistance, and flexibility. The films have at least one EVOH (ethylene-vinyl alcohol copolymer) layer and at least one layer of a different thermoplastic resin. The total thickness of the EVOH layer is 90% or more of the total film thickness. This composition balance optimizes gas barrier, bending resistance, and flexibility simultaneously. The films have applications in packaging materials and reaction equipment like reactor containers due to their properties.

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Recyclable polyethylene film for packaging with improved printability, durability, and processability. The film has a multilayer structure with separate printing and sealing layers. The printing layer contains a mixture of LLDPE, LDPE, and HDPE resins. The sealing layer contains LLDPE, MDPE, and HDPE resins. The melting points of the outermost printing layer and sealing adhesive layer are matched. This allows high-speed bundling and heat sealing at low temperatures without damaging the film. The film also has properties like puncture resistance, tensile strength, elongation, haze, and hot tack balance. The layered structure improves print quality, reduces defects, and enables recyclability compared to heterogeneous composite films.

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Biodegradable starch-based polymer composition with ionic liquid plasticizers for sustainable packaging. The composition involves blending native starch, biodegradable polyester, and an ionic liquid plasticizer to create a thermoplastic starch film that is stable under varying humidity conditions and has improved mechanical properties compared to traditional starch blends. The ionic liquid plasticizer prevents retrogradation and maintains stability even after storage. The composition offers an eco-friendly alternative to synthetic plastics for packaging applications.

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Biaxially oriented polypropylene film with improved thermal dimensional stability for packaging applications like food packaging. The film contains a specific range of α-olefin-derived structural units other than propylene, such as ethylene and 1-butene, in addition to propylene units. This composition range allows better balance of thermal dimensional stability and moldability compared to traditional polypropylene films. The film can also have a surface resin layer containing homopolypropylene for added properties. The film expands less in thickness during heat treatment and has lower thermal expansion compared to typical biaxially oriented polypropylene films.

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Adhesive polymer composition and multilayer molded articles using it for improved adhesion between layers in food packaging materials. The composition contains a styrene-containing block copolymer with terpene segments, an adhesive component, and a modified polyolefin. This combination provides excellent adhesion to difficult-to-bond materials like polyester. The terpene segments in the block copolymer improve adhesion by enhancing compatibility with the adhesive component and modified polyolefin.

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Making biodegradable plastic films from food waste and food byproducts using a simple extraction and blending process. The method involves treating starchy foods like bananas, potatoes, or grains with an acid to extract the starch. The starch precipitates are separated, dried, and mixed with water to form a slurry. This slurry can be cast into films along with other biopolymers like chitosan. The films have properties like strength, elongation, and water resistance suitable for packaging applications. The blended films can be biodegradable in water, soil, or compost.

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Resin composition for sealants in packaging applications that provides improved properties like adhesion and easy opening compared to fossil fuel-derived sealants, while also being environmentally friendly. The composition contains specific ratios of biomass-derived propylene polymer, ethylene polymer, and tackifier resin. It uses biomass-derived structural units in the propylene polymer, biomass ethylene in the ethylene polymer, and optionally biomass-derived tackifier resin. The biomass content is at least 0% and less than 100% by mass. This composition balances sealing strength and ease of opening for packaging materials like laminates and lids.

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Coating agent, laminate, and packaging material with improved gas barrier properties. The coating agent has a specific composition of polyol, isocyanate, and acid components that forms a cured coating with enhanced gas barrier properties when applied to a base material. The polyol is made by esterifying glycerol and phthalic anhydride. The isocyanate is a polymeric isocyanate derived from trimethylolpropane and xylylene diisocyanate. The acid is an ortho or meta carboxylic acid. The coating agent can be used to make gas barrier coatings for packaging materials like films and containers. The coating improves barrier properties against gases like oxygen and carbon dioxide compared to conventional coatings.

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Composite paper for packaging applications made from cellulose fibers and mineral particles derived from purified phosphate mining waste. The paper aims to repurpose phosphate washing sludge as a sustainable alternative raw material in packaging. The sludge undergoes chemical treatment to remove toxic metals. The treated sludge particles are mixed with cellulose fibers to make composite paper. The composite paper has improved thermal and fire resistance compared to cellulose-only paper. It can be further coated with thermoplastic materials for enhanced water resistance.

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Biodegradable packaging cushioning material that is environmentally friendly, has low manufacturing costs, and improves moisture resistance, impact resistance, and shrinkage resistance compared to traditional starch-based foam cushioning materials. The composition contains starch, biodegradable aliphatic polyester, foam cell structure improver, foaming nucleating agent, and lubricant. The composition is mixed and extruded through a twin screw extruder with controlled water injection to create the foam. This allows manufacturing a biodegradable cushioning material with improved properties compared to powder-based starch foams.

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Vinylidene chloride-based resin compositions, stretched vinylidene chloride-based resin films, and filler packaging using them. The compositions contain a vinylidene chloride resin and a copolymer of ethylene and vinyl acetate. The ethylene-vinyl acetate copolymer has a modulus of 43-45 MPa. The compositions are used to make stretched vinylidene chloride films with improved openability. The films are used for filler packaging with sealed ends. Pinching the cover opens it by peeling off the sealed section. The films have better opening properties due to the dispersed ethylene-vinyl acetate copolymer.

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A method for manufacturing a packaging sheet with controllable internal structure. The method involves depositing a mixture of natural fiber (first fibers) and coated fiber (second fibers with a thermoplastic coating) onto a mesh belt. The deposited fiber web is heated to melt the coating on the second fibers. The web is then consolidated and cooled under pressure. This causes the coating to solidify and bind the second fibers together at contact points. The natural fiber retains its original shape and provides additional structure. The resulting packaging sheet has a controlled internal fiber arrangement with bound coated fiber regions and unbound natural fiber regions.

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Biodegradable food packaging materials made from biopolymers like PLA, nanobacterial cellulose (NBC), and PEG400. The materials can be used for packaging fruits, vegetables, shoots, seeds, etc. The NBC is produced from a specific strain of Bacillus licheniformis. The PLA-NBC composite materials have improved mechanical properties like tensile strength compared to PLA alone. The NBC provides stiffness and PEG400 adds elasticity. The materials are also antimicrobial. The NBC can be coated onto paper or formed into membranes. The PLA-neem extract coating is another biodegradable option.

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Biodegradable food packaging materials made from biodegradable nanocomposites based on polylactic acid (PLA) combined with nano bacterial cellulose (NBC) and optionally polyethylene glycol 400 (PEG400). The nanocomposites can be applied as coatings on secondary surfaces like paper or formed into membranes. The nanocomposites provide improved mechanical strength and barrier properties compared to PLA alone, making them suitable for food packaging. The nanocomposites can also be antibacterial due to the NBC content. The PLA-NBC composites can be prepared by mixing the components with stirring and spreading to dry.

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Multilayer film for packaging materials like food and medicine that balances sealing strength, heat resistance, and easy opening when used in high temperature containers like crystallized PET. The film has a sealing layer and surface layer with specific resin ratios. The total polyester resin is 70% or more, with at least 10% crystalline polyester and 20% amorphous polyester. The film also has 1% or more polyolefin resin. This composition provides good appearance after peeling, transparency, and processability while avoiding residue.

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Thermoplastic resin molded article and packaging material with both oxygen barrier and water vapor barrier properties. The article has a sandwich structure with a center layer containing an ethylene-vinyl alcohol copolymer dispersed in a continuous phase of a polyolefin thermoplastic resin. The copolymer provides oxygen barrier while the polyolefin provides water vapor barrier. The copolymer forms the dispersed phase in the polyolefin continuous phase. This dispersion structure enables both barrier properties and good adhesion.

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A method for producing a coating solution containing modified chitosan and PVA with improved water resistance, durability, and antibacterial properties, and a method for producing a packaging material coated with this modified chitosan-PVA coating. The method involves chemically modifying chitosan to create a modified chitosan solution, then mixing it with PVA solution at a weight ratio of 7:3 to 5:5 to prepare the coating composition. This modified chitosan-PVA coating provides enhanced water resistance, durability, and antibacterial properties compared to PVA alone.

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A laminated sheet for food packaging with improved moldability, mechanical properties, and appearance. The laminated sheet has an inner layer containing calcium carbonate filler and thermoplastic resin, and two outer layers of thermoplastic resin. The inner layer calcium carbonate filler has calcium carbonate particles with surface treatment containing sulfonic acid or phosphoric acid ester. The calcium carbonate content in the inner layer is 40-80% by mass. The outer layer thickness is 2% or less of the total sheet thickness. This laminate reduces variations in moldability, mechanical properties, and appearance compared to conventional calcium carbonate filler laminates. The surface treatment on the calcium carbonate particles improves dispersibility, reactivity, and reduces void formation during processing.

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A semi-chemical crumb paper with excellent quality and resistance characteristics for use in packaging. The paper is made from a unique fiber blend containing short fibers from eucalyptus trees, along with recycled fibers like declassified, unsorted, and scrap paper. This composition allows producing a robust paper with properties similar to longer fibers from birch trees. The eucalyptus short fibers provide strength, while the recycled fibers fill gaps. The paper has exceptional resistance to impacts, moisture, and crushing, making it suitable for critical packaging applications.

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Active biodegradable plastic packaging film made from pear waste that has improved mechanical properties, UV barrier, oil barrier, and biodegradability compared to conventional plastics. The film is made by combining mashed pear peel and pulp extract, starch solution, and glycerol. The pear waste acts as a filler to enhance properties, starch as a crosslinking agent, and glycerol as a plasticizer. The film is cast and cured to create a biodegradable packaging material with functional properties like antioxidant activity and moisture control. The film can be used in food packaging, pharmaceuticals, and other applications requiring sustainable and active packaging solutions.

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