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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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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Laminate, packaging material, and package for hand-cut open packages that balances biodegradability and tear strength. The laminate has a specific layer order: substrate, adhesive, barrier, and sealant. The sealant layer contains both fossil fuel-derived linear low-density polyethylene (LLDPE) and plant-derived low-density polyethylene (LDPE) in a ratio of 3:7 to 7:3. This allows biodegradable content in the sealant while maintaining tear resistance and sealing strength. The barrier layer prevents tearing into the inner layers. The outermost sealant layer is LLDPE. The adhesive layer has low-density polyethylene. The substrate can be recycled or plant-based. The laminate allows hand cutting without scissors, drop impact resistance, and biodegradability

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High toughness polyolefin resin composition for collapsible packaging boxes that have improved impact resistance and strength compared to conventional packaging materials. The composition contains specific ratios of polyolefin, block copolymer, stearic acid, chlorinated polyethylene, metal oxide, and filler. The composition can be prepared by mixing these components in the given weight percentages. The high toughness properties enable the use of collapsible packaging boxes made from the composition, which can reduce shipping volume and cost compared to rigid boxes.

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Polypropylene-based packaging material with improved drop impact resistance, blocking resistance, slipperiness, and flavor properties at low temperatures. The material contains a phase dispersion structure with spindle-shaped polypropylene elastomer domains dispersed in a matrix of polypropylene-based resin. The elastomer domains have aspect ratios of 1.2 to 9.0 and minor axis of 0.2 to 4.0 μm and major axis of 0.5 to 5.0 μm. The elastomer content is 1 to 30 parts by mass based on 100 parts of polypropylene resin. This provides good impact resistance, blocking resistance, slipperiness, and flavor properties while maintaining appearance characteristics.

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A polypropylene-based packaging material that has drop impact resistance, blocking resistance, slipperiness, and flavor properties for food packaging. The material has a unique structure with spindle-shaped domains dispersed in a matrix made of polypropylene. The domains are made of a polypropylene-based elastomer with specific size and aspect ratio. This structure provides improved drop impact resistance, blocking resistance, slipperiness, and flavor compared to conventional polypropylene packaging. It allows the material to have both drop impact resistance and slipperiness at low temperatures, which is challenging with conventional polypropylene. The laminate has a surface layer made of this specialized polypropylene material for applications like food trays and cups.

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Polyolefin sheet with improved moisture resistance, transparency, and impact resistance for packaging applications like press-through packaging and blister packaging. The sheet has two layers, an inner layer (A) containing polypropylene (PP) and an outer layer (B) containing polyethylene (PE). At least one of the layers contains a thermoplastic resin like petroleum, terpene, chroman-indene, rosin, or hydrogenated derivatives. This provides better interlayer adhesion without needing an adhesive layer. The sheet has a specified interlayer strength between the layers to balance properties. The inner PP layer enhances moisture resistance, the outer PE layer enhances transparency, and the intermediate resin improves impact resistance.

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Polypropylene composition, material, and cast film with improved high temperature resistance for packaging applications. The composition contains homopolypropylene, inorganic fillers, nucleating agents, and antioxidants. The fillers like calcium carbonate and titanium dioxide improve temperature resistance. Nucleating agents like phosphates enhance crystallization. Antioxidants prevent degradation. The optimized ratios of these components in the composition allow preparing polypropylene materials and cast films with enhanced high temperature performance for packaging applications like cast films.

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A high barrier polypropylene composite material with improved oxygen and water resistance for food and pharmaceutical packaging applications. The composite material is prepared by blending polypropylene with specific amounts of block copolymerized polypropylene, random copolymerized polypropylene, cyclic olefin copolymer, and a nucleating agent. The blended polypropylene composition has enhanced barrier properties compared to pure polypropylene without the need for additional barrier layers.

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Medical blister packaging material with improved toughness, barrier properties, and processability for better medical device packaging. The packaging has three layers: outer, middle, and inner. The middle layer is a composite of copolymerized and homopolypropylene with specific weight ratios. The outer and inner layers are other polymers. This composition provides good balance of properties like tear strength, dimensional stability, heat sealing, barrier to water vapor, and processability.

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Isotropic low linearity polypropylene composition with reduced shrinkage and coefficient of linear expansion. The composition contains modified inorganic fillers with large lamellar structure, a toughening agent, linear low density polyethylene, and polypropylene resin. The modified inorganic fillers have surface modification with water-soluble nucleating agents to induce crystallization. This reduces anisotropic shrinkage and linear expansion coefficient of the polypropylene.

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Low temperature resistant polypropylene material for packaging applications that maintains impact resistance and flexibility at low temperatures. The material contains specific compositions of polypropylene (PP), polyethylene, and ethylene-propylene rubber. The PP has a low melt index of 1.72-2.23 g/min, along with specific grades of polyethylene and ethylene-propylene rubber. This composition improves low temperature impact resistance compared to standard polypropylene.

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Low-temperature impact resistant polypropylene (PP) composition and preparation method for applications like military packaging boxes. The composition contains PP, long glass fibers, and a specific blend of toughening agents. The toughening agents are grafted maleic anhydride copolymers and ethylene-acrylate copolymers. The composition also includes a compatibilizer grafted PP. By carefully selecting the composition components, ratios, and graft levels, it provides improved low-temperature impact resistance without sacrificing other properties like strength.

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Packaging material and containers for highly viscous foods like ketchup that improves dischargeability, mobility, and sliding property of the contents. The packaging has a phase-separated structure containing a certain amount of polyethylene as a main material and polypropylene as a secondary material. This phase separation prevents adhesion of the viscous contents to the inner surface of the container and facilitates discharge. The material also has a gas barrier layer to prevent deterioration of the contents.

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Polypropylene composition for retort packaging films with reduced seal initiation temperature and improved mechanical properties for high temperature sealing. The composition has 50-76 wt% homopolypropylene, 12-25 wt% random copolymer PP with 2-10 mol% ethylene units, and 12-25 wt% propylene-ethylene copolymer with 10-25 wt% ethylene units. The compositions allow lower seal initiation temperatures and higher sealing strength compared to homopolypropylene-based compositions. They are useful for retort packaging applications like food preservation where sterilization requires high temperatures. The composition balance reduces seal through contamination and allows higher seal strengths at lower temperatures.

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High-toughness and heat-resistant polypropylene packaging bags with improved toughness and heat resistance compared to conventional polypropylene bags. The bags contain specific combinations of modified polypropylene, polyester resin, hydrogenated styrene-butadiene block copolymer, coupling agent, heat stabilizer, and composite whiskers. The whiskers are made of basic magnesium sulfate whiskers and calcium carbonate particles. The whiskers improve toughness and heat resistance while the other components enhance toughness and heat stability.

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A high impact transparent permanent antistatic polypropylene composite material with improved properties like impact resistance, transparency, and antistatic behavior compared to regular polypropylene. The composite contains functionalized ethylene-propylene rubber, antioxidant, nucleating agent, and transparent agent. The functionalized ethylene-propylene rubber has a similar molecular weight and melt flow rate to polypropylene, allowing uniform dispersion in the matrix. During processing, the rubber orients into long, narrow structures for improved impact resistance. The functionalized rubber also has a conjugated structure with conductivity. The transparent agent reduces refractive index differences between phases. The antioxidant prevents degradation. The composite can have over 70% light transmission, high notched impact strength, and surface resistivity in the 10^5-10^15 range.

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Polypropylene resin composition with improved whitening resistance and heat resistance for applications like food packaging and battery films. The composition contains an ethylene-propylene block copolymer resin made by staged polymerization. The copolymer has a specific composition with 80-85% polypropylene matrix and 15-20% ethylene-propylene rubber. The melting temperature is 161-165°C, crystallization-melting delta is 40-45°C, and solvent extract content is 2.5-3.0x ethylene content. This composition provides better whitening resistance, heat resistance, and impact strength compared to conventional ethylene-propylene copolymers.

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Anti-static PP packaging material with improved electrical conductivity for preventing static electricity buildup. The material contains a combination of antistatic agents, dispersants, toughening agents, and a titanate coupling agent. The antistatic agents include dodecyl trimethyl ammonium chloride, nano-silver, and nano-titanium dioxide. The dispersant prevents agglomeration of the nano-fillers. The coupling agent improves adhesion between the fillers and polypropylene matrix. The antistatic agents promote electron migration and diffusion, reducing volume resistivity. The dispersant prevents agglomeration of the fillers. The coupling agent improves adhesion between the fillers and polypropylene matrix.

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Polypropylene composition for food packaging lids like milk powder caps that provides better performance compared to conventional PP resins. The composition contains a propylene-ethylene random copolymer and ethylene homopolymer. The copolymer makes up 89.1-99% of the composition by weight and the homopolymer is 1-10%. This balance reduces odor, improves strength and impact resistance, and allows easier molding of food packaging lids with reduced warping and breakage.

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Polypropylene material with improved toughness, wear resistance, and antioxidant properties for packaging applications like beverage bottle caps. The material is prepared by mixing polypropylene, calcium carbonate whiskers, modified starch, ethylene-1-octene copolymer, compatibilizer, and antioxidant. The steps involve combining polypropylene and calcium carbonate, then adding modified starch, copolymer, compatibilizer, and antioxidant. The mixture is melted, blended, and extruded to form the final polypropylene material. The modified starch core coated with ethylene-1-octene copolymer shell improves toughness. Calcium carbonate whiskers and antioxidant enhance wear resistance and antioxidant properties, respectively.

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Polypropylene-based resin composition for packaging bags used in retort packaging of food products, that provides both high low-temperature impact resistance and good heat sealability. The composition contains 85-95% of a propylene/ethylene block copolymer and 5-15% of an ethylene/α-olefin copolymer. The block copolymer has specific composition and molecular structure requirements. The ethylene/α-olefin copolymer has a low melt flow rate, high density, and melting peak temperature range. The composition achieves both high low-temp impact resistance and good heat sealability for enlarged packaging bags without sacrificing one for the other.

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A propylene-based polymer composition for heat sealable packaging with improved properties like low seal initiation temperature, low overall migration, low turbidity, and good sterilizability. The composition comprises a mixture of two copolymers, one of propylene and ethylene, and the other of propylene and hexene. The ethylene copolymer has 0.1-12 wt% ethylene, MFR2 of 0.5-60 g/10 min, and melting point of 135-155 °C. The hexene copolymer has 0.1-12 wt% hexene, MFR2 of 0.5-60 g/10 min, and melting point of 120-140 °C. The composition has a MFR2 of 0.5

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Polypropylene-based resin composition for thermoforming that reduces periodic wall thickness fluctuations and improves uniformity during film and sheet molding compared to standard polypropylene. The composition contains 85-90% of a propylene polymer with MFR 2.0-10.0 g/10min and 10-15% low-density polyethylene with MFR 0.5-8.0 g/10min. This mixture provides better draw resonance resistance and melt tension to prevent drawbacks like meandering and ear shake during extrusion. The composition also has lower diameter variation and melt tension compared to just propylene. The composition can be used in packaging films and sheets that have improved uniformity and stability when thermoformed.

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A polypropylene resin composition with excellent whitening resistance, transparency, and impact resistance. The composition contains a stepwise polymerized ethylene-propylene block copolymer resin with specific properties. The block copolymer has 70-88% polypropylene matrix and 12-30% ethylene-propylene rubber copolymer. The ethylene content is 4-10%. This gives the composition two crystallization temperatures of 110-130°C and 67-77°C. This composition is useful in molded articles like food packaging films and battery films to improve whitening resistance and transparency compared to typical ethylene-propylene block copolymers.

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Blister packaging composite material containing IXPE (ionomers like ionomeric polyethylene) for improved mechanical properties, barrier properties, and UV resistance compared to IXPE alone. The composite material includes IXPE, polypropylene, dispersant, and modified inorganic minerals like calcium carbonate. The inorganic minerals are surface modified to enhance compatibility with IXPE and polypropylene. The modified minerals are added to the IXPE-polypropylene mix after extrusion and granulation to enable capillary penetration between the minerals for mechanical strength and UV resistance.

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A plastic packaging material with improved strength for applications like food packaging. The material contains a specific blend of polymers like polyethylene, PVC, polypropylene, alkyd resin, glycerol, calcium stearate, antioxidant, solubilizer, foaming agent, and corn starch. The composition provides enhanced strength compared to conventional plastic packaging materials.

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Polypropylene resin composition for retort food packaging films that provides good impact resistance, thermal adhesion, and appearance after sterilization. The composition contains a propylene homopolymer and an ethylene-propylene block copolymer polymerized in stages in the reactor. The block copolymer has 65-82% propylene homopolymer content, 25-50% ethylene content, and a solvent extract inherent viscosity of 1-2.5 dl/g when dissolved in decalin at 135°C. This composition balance enables the desired properties for retort food packaging films.

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High-performance polypropylene packaging barrels with improved load capacity, temperature resistance, hardness, antistatic properties, and sealing performance compared to conventional PP barrels. The barrels contain specific additives like maleic anhydride-grafted PP, zinc stearate, coupling agent, fiber reinforcement, wax, and titanium dioxide. The formulation provides higher tensile and bending strength, hardness, and reduced deformation at high temperatures. The antistatic properties are maintained after high-temperature processing. The fiber reinforcement enhances stiffness and sealing.

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Propylene resin sheet with excellent heat resistance, transparency, flexibility, and impact resistance for heat-sealable packaging applications like IV bags. The sheet has a composite inner layer made of a specific propylene copolymer blend. The blend contains a propylene-ethylene copolymer (A1) with Tm 120-150°C and a propylene-ethylene copolymer (A2) with Tm 150-170°C. The blended copolymer composition has specific density, melt flow rate, and crystallinity ranges to balance properties. The outer layer can be propylene homopolymer or copolymer. The sheet structure enables high-temperature sterilization without deformation, good transparency, flexibility, and impact resistance.

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Toughened polypropylene material with improved impact resistance, flowability, and transparency for thin-walled injection molded products. The material contains a blend of polypropylene, polyethylene, nucleating agent, antioxidant, and organic peroxide. The polyethylene segments dispersed in the polypropylene matrix provide impact toughness. The nucleating agent improves crystallization. The antioxidant prevents degradation. The organic peroxide improves flowability. The composition enables faster filling, higher impact resistance, and lower haze compared to polypropylene alone.

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An anti-fouling polypropylene packaging material that reduces bacterial growth and contamination compared to regular polypropylene packaging. The material contains specific additives like PET fiber, carbon nanotubes, zinc oxide whiskers, composite fillers, antioxidants, and organic compounds like capsaicin and pitrathione zinc. These additives improve the material's fouling resistance properties.

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Highly transparent, heat-resistant, and impact-resistant polypropylene composition for applications like containers, sheets, and films. The composition contains random copolymer polypropylene, metallocene linear low-density polyethylene (mLLDPE), nucleating agent, aluminum oxide, antioxidant, antistatic agent, and acid absorbent. The mLLDPE provides impact resistance, aluminum oxide enhances heat resistance, and the other additives improve properties like transparency and processing. The composition balances properties like transparency, heat resistance, and impact strength.

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Polypropylene packaging material with improved properties like flame retardancy, flexibility, and impact resistance. The material contains optimized combinations of ingredients like starch, nano zinc oxide, alumina, lignin, melamine pyrophosphate, calcium sulfate, and urea. These additives enhance properties like crystallization control, toughening, flame retardancy, and flexibility without compromising transparency or processability. The material can have a vertical burning rating (UL-94) of V-0.

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