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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