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.

Source

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.

Source

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.

Source

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.

Source

High flow polypropylene compositions for injection molding applications with balanced properties like high flowability, low shrinkage, good impact strength, and stiffness. The compositions contain a heterophasic propylene copolymer with a specific melt flow rate range (75-250 g/10 min) and a particulate inorganic nucleating agent. The copolymer is made by a multistage polymerization process with separate propylene and propylene-ethylene stages. The resulting copolymer has a unique multimodal molecular weight distribution. The compositions find applications in injection molded parts like automotive components due to their superior balance of properties.

Source

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.

Source

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.

Source

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.

Source

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.

Source

A high flow polypropylene composition for lightweight injection molding, thin wall injection molding, and foamed injection molding applications. The composition contains a heterophasic propylene copolymer (HECO) and a random propylene copolymer (CP) made using a single-site catalyst. The HECO has specific intrinsic viscosity and comonomer content ranges. The composition has a melt flow rate of 20-100 g/10 min. It provides good mechanical properties, low shrinkage, and processability for injection molding and foaming.

Source

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.

Source

A reusable freezable water bottle that can withstand freezing temperatures without cracking or breaking. The bottle has a body with ribs along its length and a cap. Both the body and cap have a specific polymer composition containing polypropylene and a thermoplastic elastomer like SEBS. This combination provides impact resistance and flexibility at low temperatures to prevent cracking when the bottle contents freeze.

Source

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.

Source

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.

Source

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.

Source

Polypropylene resin composition for injection molding that provides improved rigidity and strength in molded articles. The composition contains a polypropylene-based resin (A) with a continuous phase made of a propylene/ethylene copolymer and a rubber phase made of an ethylene/α-olefin copolymer. The composition also optionally contains other copolymers and additives. The composition can be prepared by polymerizing the monomers and blending the resulting copolymers. The specific composition and polymerization conditions provide enhanced mechanical properties in molded parts.

Source

Heterophasic polypropylene composition with improved balance between stiffness, impact resistance, and optical properties for injection molding applications. The composition contains a matrix of propylene copolymers with ethylene content ranging from 12-35 wt% and a dispersed phase of ethylene-propylene rubber. Adding a nucleating agent further enhances properties. The composition has a specific property profile with high stiffness, high impact resistance, low haze, and good fluidity.

Source

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.

Source

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.

Source

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.

Source