Versatile Polypropylene in Packaging Applications

High barrier polypropylene composite material for food packaging that provides improved water vapor and oxygen barrier properties compared to plain polypropylene. The composite contains specific additives like organic montmorillonite clay, maleic anhydride grafted polypropylene, ethoxylated amide polymer, and a silane coupling agent. These components enhance the binding between the clay and polypropylene, and also form entangled networks that improve the barrier properties. The composite is prepared by melt blending the components in a twin screw extruder.

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Thin-wall injection molding polypropylene resin with improved properties for applications like thin-wall containers and food packaging. The resin contains specific amounts of components like polymer nucleating agent, antioxidant, and halogen absorber. This optimized composition provides fast crystallization, good balance of rigidity and toughness, aging resistance, dimensional stability, low odor, and high gloss. The reduced nucleating agent dosage makes the resin more environmentally friendly.

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Polypropylene-based packaging material with improved drop impact resistance, blocking resistance, sliding properties, and flavor properties for food packaging applications. The material contains a spindle-shaped dispersed phase of polypropylene elastomer in a matrix of polypropylene resin. The elastomer particles have aspect ratios of 1.2-9.0 and sizes in the range of 3-10 μm. This provides impact resistance, blocking prevention, and sliding properties at low temperatures without sacrificing flavor. The elastomer composition and processing conditions are optimized to achieve the desired dispersed particle shape and size.

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Polypropylene composite material for pharmaceutical packaging with improved oxygen barrier and reduced leachables. The composite is made by combining homopolymer PP resin, high-density polyethylene, sorbitol nucleating agent, and organic acid metal salt nucleating agent in specific proportions. This compounding improves the oxygen barrier of PP while reducing n-hexane leachables compared to PP alone. The composite can be made using a twin-screw extruder with water washing to further reduce leachables.

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A polypropylene composition with improved oxygen barrier properties and light transmittance for packaging applications like food and pharmaceuticals. The composition contains specific additives like hydrogenated petroleum resin, cyclic olefin copolymer, deoxidizer, and nucleating agents. These additives in optimized amounts improve oxygen barrier without sacrificing ductility and maintain high light transmittance. The composition can be prepared by mixing the base polypropylene with the additives and processing into films.

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Polypropylene material composition and polypropylene material for injection molded products like food, medicine, and cosmetic packaging that balances toughness, hardness, and transparency. The composition contains polypropylene and an ethylene-α-olefin copolymer with specific properties. The ethylene-α-olefin copolymer has a melt index of 0.1-20 g/10 min and high dispersion of α-olefin units. The polypropylene has a higher melt index. This composition provides improved impact resistance, clarity, and stiffness compared to traditional polypropylene.

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A polypropylene composite material with improved low-temperature toughness and reduced xylene solubility for food packaging. The composite consists of 80-90% of copolymerized polypropylene with >12% ethylene content, 10-20% high-density polyethylene, and optionally 0-0.5% additives. The copolymerized polypropylene provides the low-temperature toughness and the high-density polyethylene improves impact resistance. The composite has lower xylene solubility than pure polypropylene due to the copolymer's higher ethylene content.

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Low-temperature resistant starch-based food packaging material that can maintain flexibility at low temperatures like -18°C without hardening and brittleness. The material contains specific ratios of starch, polypropylene, polyethylene, polyolefin elastomer, compatibilizer, and lubricant. The ratios are: starch 40-45%, polypropylene 35-40%, polyethylene 17-20%, polyolefin elastomer 2-3%, compatibilizer 0.4-0.5%, and lubricant 1.8-2%. The material can be prepared by mixing these components and processing into packaging forms. The ratios and preparation method enable the material to remain flexible at low temperatures for food packaging applications.

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Polypropylene film with improved puncture resistance and tear strength for packaging applications that need to avoid damage from sharp objects. The film is made from a polypropylene composition containing an ethylene-propylene copolymer with specific ratios of ethylene and propylene units and ethylene-propylene rubber content. The composition allows preparing polypropylene materials with improved properties for making puncture-resistant films. The ethylene copolymer content is 10-20% with 80-90% propylene. The ethylene-propylene rubber content is 25-50%. This composition provides films with high tear strength, puncture resistance, low fish-eye crystal points, and low haze compared to standard polypropylene films.

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Polypropylene films with improved temperature resistance, clarity, and impact strength for packaging applications like food, beverages, and pharmaceuticals that require high-temperature sterilization. The films are made from a polypropylene-containing composition with an ethylene-propylene copolymer containing ethylene-propylene rubber. The copolymer has specific ethylene, propylene, and rubber weight percentages, and an opening agent. This composition allows the films to withstand sterilization temperatures without deformation, discoloration, or precipitation.

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Food packaging box design that reduces environmental impact and improves user experience compared to conventional plastic containers. The box has a tear strip on the lid that can be torn off to open the box without lifting the lid. This prevents soup splashing. The box also has a reinforced tear seam for tearing the strip. The box is made with modified materials to reduce plastic usage. The composition includes 55-65% impact modifier, 5-40% composite flame retardant, 2-10% organic chemical foaming agent, and 2.5-5% lubricant, instead of the original 70% PP. This reduces plastic content, cost, and degradation time. The box has an engaging edge and groove for stacking. The tear strip provides a focus point for grabbing instead of the edge. This prevents box deformation.

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Laminated sheet with improved properties for food packaging applications. The laminated sheet has an inner layer made of a highly filled polypropylene with inorganic powder like calcium carbonate, and an outer layer containing a different polypropylene resin. The inner layer contains specific amounts of zinc stearate, stearic acid, and a unique blend of polypropylenes with different branching levels. This composition allows the inner layer to have good moldability, appearance, strength, and acid resistance, even with high filler loadings. The outer layer provides further properties enhancement. The laminated sheet can have a vacuum formed food packaging container made from it.

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Modified polypropylene material with improved properties for turnover boxes that provides better strength, heat resistance, and outdoor aging resistance compared to conventional polypropylene. The modified polypropylene is made by blending specific ratios of block copolymer polypropylene, linear low density polyethylene, mineral powder, and additives. The blending ratios are crucial to achieve the desired performance. The modified polypropylene can contain toner for printing. The modified polypropylene shows higher tensile strength, elongation at break, bending strength, impact resistance, and heat distortion temperature compared to unmodified polypropylene. The modified polypropylene also has better property retention after aging.

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Laminate for packaging materials that has excellent recyclability, bag-making suitability, and pressure resistance, using a sealant made of a polypropylene material with a melting point difference of 15°C or more compared to the base film. This allows sealing the base film made of the same polypropylene material without deterioration. The sealant melting point is 130-160°C. The laminate can have an intermediate layer, barrier, or both.

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High light transmittance composite material made of polypropylene (PP) and ultraviolet radiation modified polyethylene (UVR-PE) for applications like packaging where light transmission is important. The UVR-PE is prepared by ultraviolet irradiating a mixture of polyethylenes, photoinitiator, crosslinker, and dibenzylidene sorbitol. This creates a fibrous network structure that improves PE light transmittance. Adding the UVR-PE to PP further boosts composite light transmission. Antioxidants prevent yellowing.

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Food contact material (FCM) compositions with improved properties like stiffness, barrier, thermoformability, and optical properties for food packaging. The FCM compositions contain a blend of polypropylenes, one with low melt flow rate and one with high melt flow rate, along with a hydrocarbon resin. This blend provides high stiffness, clarity, barrier, and processability compared to using just polypropylene. Nucleating agents can also be added. The FCM compositions can have properties like 2.5 GPa tensile modulus, 40 MPa tensile strength, <20 J/m Izod impact, <0.005 g/100 in2/48 hr water vapor transmission rate, <0.07 cc/pkg/24 hr oxygen transmission rate, <80% haze, and <50% el

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Laminate for packaging materials and a package with improved drop resistance at low temperatures by using an impact-resistant sealant layer made of a polyolefin material with specific properties. The laminate has at least a substrate layer made of oriented polypropylene and a sealant layer made of a polyolefin material with an elastic modulus of 100 to 500 MPa and film elongation of 500 to 900%. This sealant layer reduces bag breakage when dropped, especially at low temperatures. The laminate can also have an intermediate layer and a barrier film. The sealant layer density is 0.91 to 0.95 g/cm3. The polyolefin sealant may be linear low-density polyethylene. The package is formed by heat-sealing the laminate edges.

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Low temperature resistant polypropylene material for packaging applications like self-heating food containers that has improved low temperature impact strength, toughness, and cold resistance compared to conventional polypropylene. The material is prepared by blending specific amounts of high density polyethylene and polyolefin elastomer with the polypropylene. This modification improves the low temperature performance without sacrificing the high temperature properties of polypropylene.

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Low-odor and scratch-resistant polypropylene material for applications like packaging where odor and durability are important. The material has reduced odor during processing and use compared to standard polypropylene. It achieves this by incorporating specific additives and processing steps. The additives include fillers, surface crack fillers, and masking agents. The processing involves aging the material to simulate long-term exposure conditions. The fillers and surface crack fillers reduce odor by limiting polypropylene degradation and oxygen ingress. The masking agents further suppress odor by shielding UV light. The aged material has lower odor levels than standard polypropylene after aging.

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Packaging material for food with improved antibacterial properties using modified nano-zinc oxide and natural organic antibacterial agents. The nano-zinc oxide is surface modified with a coupling agent to improve dispersion and compatibility in the polymer matrix. Natural antibacterial agents like cinnamaldehyde and thymol are then functionalized onto the modified nano-zinc oxide. This provides synergistic antibacterial activity against both Gram-positive and Gram-negative bacteria. The functionalized nano-zinc oxide is incorporated into the packaging material along with other components like polypropylene and starch.

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