Random Copolymer Polypropylene for Packaging

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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Propylene-ethylene random copolymer compositions for hot fill packaging of food and beverages that provide good stiffness, heat resistance, and transparency. The copolymers have propylene as the primary monomer with 2-6 wt% ethylene, melt flow rates >1 g/10 min, and xylene solubles <7 wt%. They are produced using a Ziegler-Natta catalyst and alkoxysilane electron donor.

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A polypropylene composition with low shrinkage and good impact strength/stiffness balance. The composition contains a heterophasic propylene copolymer with a specific ratio of propylene matrix and ethylene-propylene rubber phases. The composition has a melt flow rate in the range of 0.50 to 120 dg/min and a methylene sequence n>5 below 16. This combination of properties provides a polypropylene with reduced shrinkage compared to conventional compositions while maintaining good impact resistance.

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Multilayer film for packaging applications that provides excellent heat resistance and transparency. The film has an outer layer containing a propylene homopolymer and a propylene/ethylene random copolymer with low ethylene content, sandwiched between an inner layer with a propylene/ethylene block copolymer and an elastomer. The outer layers have specific ratios of propylene and ethylene copolymers to balance heat resistance and transparency. The inner layer with the block copolymer and elastomer provides flexibility.

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Polypropylene resin composition for injection stretch blow molding that balances transparency, impact resistance, and moldability. The composition contains two types of propylene-ethylene copolymers with different melt indices, linear low-density polyethylene made with a metallocene catalyst, a nucleating agent, and a slip agent. The copolymers, LLDPE, nucleating agent, and slip agent are mixed in specific amounts to improve moldability while maintaining transparency and impact resistance. The copolymers have melt indices of 0.1-2 g/10 min and 0.3-10 g/10 min, and the LLDPE content is 1-10%. The nucleating agent improves transparency, and the slip agent reduces stickiness.

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Propylene-butene random copolymers with excellent balance of properties for transparent molded articles. The copolymers contain propylene as the major monomer and a minor amount of butene. They have low haze, good clarity, and reduced fogging compared to pure propylene copolymers. The propylene-butene copolymers can be produced using specific catalysts that avoid phthalates. The copolymers have a broad molecular weight distribution and low xylene solubles. They can be used in molding processes like injection molding, blow molding, and thermoforming to make transparent articles like bottles, containers, and films.

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High clarity polypropylene compositions for transparent articles that retain clarity after high temperature sterilization. The compositions contain propylene-butene copolymers with specific properties like low xylene soluble fraction and butene content. These copolymers have excellent haze resistance after heat aging compared to propylene-ethylene copolymers. Nucleating agents can further improve clarity. The compositions find applications in molded articles like packaging and medical devices that require high temperature sterilization without haze degradation.

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A reusable bottle that can be frozen without cracking or breaking. The bottle has a body and cap made from a specific polymer composition. The body contains 85-90% polypropylene random copolymer (PPRC) and 10-15% thermoplastic elastomer (TPE) like SEBS. The cap has 85-90% polypropylene block copolymer (PPB) and 10-15% SEBS. This composition improves impact resistance and prevents cracking when the frozen bottle is handled. The TPE additive in the polypropylene matrix enhances ductility and flexibility at low temperatures.

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Reusable freezable water bottle with improved impact resistance and ability to withstand freezing temperatures without damage. The bottle has a body made of a polymer composition containing 85-90% polypropylene random copolymer (PPRC) and 10-15% thermoplastic elastomer (TPE) like SEBS. This composition provides impact resistance when frozen. The cap is made of 85-90% polypropylene block copolymer (PPB) and 10-15% SEBS. The composition ratio and specific polymer types are optimized to balance properties like impact resistance, flexibility, and processability.

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Polypropylene composition for foaming with improved mechanical properties. The composition contains a heterophasic propylene copolymer (HECO) and a propylene copolymer (CP) made with a single site catalyst. The HECO has a melt flow rate of 1-30 g/10min and a shrinkage of less than 2.0%. The CP is a random copolymer of propylene and a C4-C10 alpha-olefin comonomer. The composition has balance of mechanical properties and foamability for applications like injection molding and foaming.

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Heterophasic polypropylene compositions with balanced stiffness and impact resistance, low volatile/semi-volatile emissions, and good processability. The compositions contain a crystalline propylene copolymer matrix and an amorphous ethylene/propylene copolymer dispersed in the matrix. The compositions also have an elastomeric ethylene/alpha-olefin copolymer. The crystalline copolymer is made using a single-site catalyst, while the elastomeric copolymer is made using a Ziegler-Natta catalyst. The compositions are useful for applications like packaging and automotive parts with thin wall thicknesses.

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A liquid repellent layer composition for packaging materials that prevents adhesion of contents to the inner surface. The composition contains a polypropylene resin and a silylated polyolefin. The polypropylene resin has a specific composition with a mix of random and block polypropylene in a ratio of 20-80/80-20. This composition provides the right balance of crystallinity and melting point to enable segregation of silicon from the silylated polyolefin on the liquid repellent layer surface. This segregation improves liquid repellency compared to using just the polypropylene resin.

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Propylene/1-hexene copolymers for injection molded containers, particularly thin wall containers, with good balance of mechanical properties that can be produced efficiently. The copolymers have 1.5-2.5 wt% 1-hexene content, 97.5-98.5 wt% propylene content, melt flow rate of 35-65 g/10 min, and crystallinity. These properties enable thin-walled containers with low weight, high strength, and impact resistance. The copolymers are made via fluidized bed polymerization with circulation between riser and downcomer zones.

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Propylene-ethylene random copolymers for hot fill packaging applications that have improved stiffness, heat resistance, and transparency compared to existing copolymers. The copolymers have propylene as the primary monomer with 2-6% ethylene content, melt flow rates >1 g/10 min, xylene solubles <7%, and a xylene solubles/ethylene ratio <=1.5. They are produced using Ziegler-Natta catalysts and alkoxysilane electron donors.

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Polypropylene resin composition for thin-film injection molded articles that balances transparency and impact resistance. The composition contains a propylene-ethylene random copolymer, low density or linear low density polyethylene, and a polyolefin-based elastomer in specific ratios. The low density/linear low density polyethylene improves low-temperature impact strength while maintaining similar transparency to the propylene-ethylene copolymer. The polyolefin-based elastomer further enhances impact resistance.

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Heterophasic propylene copolymer compositions with superior mechanical properties and processability for storage applications like crates and pails. The compositions have a balance of high flexural modulus (800 MPa) and high impact strength (400 J/m) by dispersing an elastomer phase in a propylene matrix polymer. The compositions can be injection molded with good processability due to the matrix polymer composition and dispersed elastomer phase content ranges.

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A polypropylene random copolymer with improved stiffness, impact resistance, and optical properties. The copolymer contains 2-5 wt% ethylene as comonomer, has a MFR230/2.16 of 8-60 g/10 min, and a CD at 25% peak height of at least 13 K. This specific comonomer distribution provides the desired combination of properties. The copolymer is produced using a Ziegler-Natta catalyst.

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Soft heterophasic propylene copolymers with improved stiffness, impact resistance, and optical properties for injection molded packaging applications. The copolymers have a specific composition and structure that balances matrix and rubber phases. It contains a propylene random copolymer matrix, a propylene random copolymer modifier, and a dispersed elastomeric propylene copolymer rubber phase. The modifier copolymer has a comonomer content in the range of 4-15 wt% and a cold xylene soluble fraction of 10-34 wt%. This improves compatibility between the matrix and rubber phases. The result is a heterophasic copolymer with enhanced stiffness, impact resistance, and optical properties compared to conventional heterophasic copolymers.

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Injection molded medical articles made from a propylene polymer composition that has improved mechanical properties like flexural modulus, impact resistance, and optical properties compared to regular propylene homopolymer. The composition contains a specific ratio of propylene-ethylene copolymer (C2 content) in the propylene polymer. This composition can be obtained by a two-zone gas phase polymerization process. The composition maintains good transparency after sterilization. The propylene-ethylene copolymer improves impact resistance without sacrificing transparency compared to regular propylene homopolymer.

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Polypropylene resin composition for injection molding that reduces burrs and improves fluidity compared to conventional polypropylene. The composition contains a conjugated diene-modified propylene-ethylene copolymer and a polypropylene resin. The modified copolymer has a lower melt flow rate than the polypropylene. The blend has specific melt flow and tension properties to suppress burrs while maintaining moldability. The modified copolymer acts as a flow enhancer without reducing impact resistance. The blending ratios and ranges are provided to optimize the properties.

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Polypropylene resin composition for injection molding and compression molding applications that provides a balance of rigidity, impact resistance, low gloss, and processability. The composition contains specific ratios of polypropylene, ethylene-propylene copolymer, and long-chain branched ethylene-alpha-olefin copolymer components. The ethylene-propylene copolymer has a narrow MFR range, high propylene content, and specific viscosity. The long-chain branched copolymer has controlled MFR and density. This composition allows high fluidity during molding, good impact resistance, reduced gloss, and processability for injection compression molding.

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Propylene copolymer for cast products like injection molded food packaging with improved mechanical properties and processing characteristics. The copolymer has a specific comonomer content, melt flow rate, multimodal comonomer distribution, and nucleating agent to achieve desired properties. The copolymerization process involves sequential polymerization steps. The copolymer has a comonomer content of 3.7-7.3 mol%, melt flow rate >10 g/10 min, multimodal comonomer distribution, and nucleating agent like vinylcyclohexane polymer. This allows the copolymer to have high crystallization temperature and flowability for shortened molding cycle times.

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Polypropylene resin composition and molded articles made from it that have improved balance between rigidity and impact resistance, and reduced flow marking compared to conventional PP compositions. The composition contains 20-78 wt% of an ethylene-propylene block copolymer with a specific intrinsic viscosity ratio, 2-20 wt% of high density polyethylene, and 10-30 wt% of inorganic filler. The block copolymer is made by step polymerization of propylene and ethylene, with a ratio of xylene-soluble copolymer to propylene homopolymer viscosity of 5-10. This composition provides improved impact resistance and suppressed flow marks in injection molded parts compared to conventional PP blends.

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Injection moldable composition for transparent articles with balanced rigidity, clarity, and toughness. It contains a random propylene copolymer, a propylene-ethylene copolymer, and optionally a homogeneous ethylene-alpha olefin copolymer. The propylene-ethylene copolymer has isotactic propylene sequences and a melting temperature that remains high as comonomer content increases. The composition allows molding articles with thin walls, low fog, and good optics while avoiding whitening during handling.

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Polypropylene resin composition for blow molding that provides improved impact strength, transparency, and reduced surface elution compared to conventional polypropylene. The composition contains a first propylene/ethylene/1-butene copolymer (80-95%) with specific compositions, a second propylene/ethylene/1-butene copolymer (1-5%) of the first copolymer, and a linear low density polyethylene (2-10%) with specific properties. The compositions and block copolymer formation process enable high melt viscosity, impact strength, and transparency for blow molding large containers.

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Polypropylene-based resin composition and injection-molded article made from it with improved properties like impact resistance, rigidity, transparency, and moldability compared to conventional polypropylene. The composition contains specific ratios of propylene homopolymer, propylene-ethylene copolymer, and ethylene polymer. The composition allows making injection-molded articles with good balance of properties like impact resistance, rigidity, transparency, and moldability for applications like food packaging containers.

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Laminate film for packaging applications that provides antifogging properties without compromising sealing strength. The film has a heat sealing layer with specific resin composition containing a propylene-based polymer, copolymers like propylene/1-butene, ethylene/alpha-olefin, and 1-butene/alpha-olefin. The heat sealing layer surface has a wet tension of 32-45 mN/m. This combination of copolymers and wetting properties prevents fogging when sealing high water content foods without compromising seal strength.

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A propylene-ethylene random copolymer composition with high melt flow rate (MFR) for producing molded articles with good rigidity and impact properties and also good transparency. The composition is a multimodal propylene copolymer with 3-4.5% ethylene content and MFR of 60-150 g/10 min. The copolymer is prepared by a continuous polymerization process using a two-stage reactor system with different gas compositions in each stage. The composition can be used to make articles like blow molded containers, injection molded parts, films, and fibers with improved properties compared to conventional propylene copolymers.

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Peelable packaging film for items like crackers with reduced puncture risk compared to traditional polyethylene films. The film has a multilayer structure with a puncture-resistant polypropylene core layer containing a propylene-ethylene copolymer. An intermediate peelable layer with a peeling agent between the core and inner skin layer allows easy peeling. The propylene-ethylene copolymer in the core improves puncture resistance compared to plain polypropylene.

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Propylene copolymer with high comonomer content and high propylene content in the cold-soluble fraction for blow molded articles with improved optical properties and drop test performance. The copolymer has a melt flow index (MFR2) of 0.5-2.5 g/10 min, cold soluble content in xylene (XCS) of 30-40 wt%, comonomer content of 7.5-12 wt%, and a catalyst system sequential polymerization process. The copolymer has good optical clarity and drop test impact when blow molded into articles like bottles.

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Thermoplastic propylene copolymer composition for molded articles with good rigidity, impact resistance, and optical properties. The composition contains two random copolymers: (A) a propylene copolymer with 0.1-2 wt% ethylene units and 60-85 wt% propylene, and (B) a propylene copolymer with 7-17 wt% ethylene units and 15-40 wt% propylene. The total ethylene content is 3-4.5 wt%. The composition is prepared by continuous polymerization in two reactors with different gas compositions to balance impact resistance, rigidity, and optical properties.

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Laminate structure for packaging materials that provides good delamination resistance, appearance, and gas barrier properties. The laminate has layers of polyolefin resin, a deposition layer, and an inorganic layer. The deposition layer composition contains grafted polypropylene with modified propylene-based copolymer. The grafting improves adhesion between the deposition layer and the polyolefin layer, preventing delamination. The modified copolymer provides glitter appearance in the inorganic layer.

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Extrusion blow molded articles, like bottles, with improved optical properties by using a specific propylene copolymer composition. The copolymer has a high comonomer content, moderate xylene soluble content, and a bimodal molecular weight distribution. This combination allows better visual appearance and clarity of the molded article compared to typical blow molded parts made from propylene copolymers. The copolymer composition can have a comonomer content of 2-7 wt% and an intrinsic viscosity of 1.3-3 dl/g. The copolymer matrix has a bimodal comonomer content distribution and molecular weight distribution.

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Polyolefin composition with good resistance to whitening and impact. The composition contains a specific blend of crystalline propylene polymer and ethylene-alpha-olefin copolymer. The crystalline propylene polymer has high isotacticity and specific pentad content. The ethylene copolymer has a high ethylene content and specific olefin comonomers. The blend composition has properties like good whitening resistance, impact resistance, and balancing of properties.

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Blow molded products like bottles with improved appearance and impact resistance after sterilization. The products are made from a propylene copolymer composition containing two fractions of propylene copolymers with different comonomer contents. The lower comonomer fraction copolymer (A) has 0.1-2.5 mol% comonomer. The higher comonomer fraction copolymer (B) has higher comonomer content. This composition provides better appearance and impact strength after sterilization compared to copolymers with uniform comonomer content.

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Propylene copolymer for thin-wall packaging with high flowability, impact strength, and clarity. The copolymer has a specific composition of propylene units and comonomer units. It can be made by slurry polymerization using a catalyst system with a magnesium compound and an internal donor. The copolymer has a propylene content of at least 95 wt%, a comonomer content of at least 5 mol%, and a melting flow rate (MFR2) of at least 35 g/10 min. The copolymer is useful in thin-wall packaging applications like containers, cups, and lids due to its good balance of properties like flowability, impact resistance, and optical clarity.

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Polypropylene resin composition with improved low-temperature impact resistance and transparency compared to traditional polypropylene. The composition contains an ethylene-propylene random copolymer and a specific amount of atactic polypropylene with a weight average molecular weight of 50,000 to 1,000,000. The atactic polypropylene improves low-temperature impact resistance. The ethylene-propylene copolymer provides transparency. The compositions can have low melt indexes and high impact strength. Using a specific transition metal catalyst for the atactic polypropylene further enhances the impact resistance. The compositions find applications in refrigeration containers and other products needing both impact resistance and transparency.

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Heat-sealable, peelable packaging film for puncture-prone products like crackers. The film has a core layer made of puncture-resistant biaxially oriented polypropylene (BOPP) containing a propylene-ethylene copolymer. An intermediate peelable layer with a peeling agent is sandwiched between the core and an interior skin layer. The core layer's puncture resistance is enhanced by adding an elastomeric propylene-ethylene copolymer to the core layer composition. This allows the film to be heat-sealed, peeled easily, and have improved puncture resistance compared to pure BOPP.

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A polypropylene-based resin composition for injection molding with improved impact resistance, rigidity, and transparency compared to conventional polypropylene. The composition contains specific propylene-ethylene copolymers with controlled ethylene content and melt flow rates. Blending these copolymers with a polypropylene having a unique long-chain branched structure provides the enhanced properties. The composition can be used to make injection molded products with better impact resistance, rigidity, and transparency than traditional polypropylene.

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Metallocene random propylene-based copolymers for injection stretch blow molding (ISBM) that provide high clarity without clarifiers and ease of reheating during the ISBM process. The copolymers have melting points below 130°C, low xylene soluble content (<15 wt %), and low haze (<5%) and gloss (>75%) after ISBM. They are suitable for medical and cosmetic packaging and containers.

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Blow molded articles made from a propylene-ethylene copolymer resin composition that allows excellent properties like transparency and rigidity in blow molded articles at lower temperatures compared to prior art. The composition contains specific propylene-ethylene copolymers with controlled compositions and molecular weights. The main copolymer (A) has 0-6% ethylene, Mw/Mn of 2-4, and MFR of 0.1-5 g/10min. The secondary copolymer (B) has 0.4-13% ethylene, MFR of 0.5-20 g/10min, and consists of a low-ethylene propylene copolymer (B1) and a higher-ethylene propylene-ethylene copolymer (B2). The composition allows blow

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Polypropylene resin composition and molded articles made from it that have good balance of properties like rigidity, impact resistance, and elongation at break. The composition contains 75-98% of a propylene-based polymer and 2-25% of a propylene-ethylene random copolymer. The specific ratio and types of propylene polymers provide a composite with optimal properties for applications like automotive parts and electrical components.

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Stretch packaging film for food applications that is chlorine-free and contains no plasticizers. The film has a layer structure with a core layer made of a specific propylene-ethylene copolymer and a crystalline polypropylene resin. The propylene-ethylene copolymer has 5-30% ethylene content and unique crystallization properties. The core layer composition and ratio to the crystalline polypropylene resin provides good film properties like stretch, transparency, and sealing while avoiding issues like blocking and film defects.

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