Abstract: Polymer articles and processes of forming polymer articles are described herein. The processes generally include providing a propylene based polymer formed from a metallocene catalyst and melt processing the propylene based polymer to form a polymer article.

Abstract: Polymer articles and processes of forming polymer articles are described herein. The processes generally include providing a propylene based polymer formed from a metallocene catalyst and melt processing the propylene based polymer to form a polymer article.

Abstract: Polymer articles and processes of forming polymer articles are described herein. The processes generally include providing a propylene based polymer formed from a metallocene catalyst and melt processing the propylene based polymer to form a polymer article.

Abstract: A method of preparing a thermoformed article which is relatively isotropic in terms of shrinkage of the final thermoformed article along the sheet extrusion flow path (the longitudinal direction) and the transverse direction. The article is prepared from an isotactic polypropylene produced by the polymerization of propylene with an isospecific metallocene catalyst. The polymer has a melt flow rate within the range of 1-5 grams/10 minutes and a melting temperature of no more than 160° C. The polypropylene is extruded to provide a sheet which is oriented in at least one direction and has a thickness of 10-100 mils. The sheet is heated to a temperature of 135-160° C, and thermoformed in contact with a template having the desired configuration to produce the thermoformed article. The thermoformed article is then cooled and retrieved from the template to arrive at the final product.

Abstract: Injection stretch blow molded (ISBM) articles and methods of forming the same are provided herein. In one embodiment, the ISBM articles generally include a propylene based random copolymer having a molecular weight distribution of from about 9 to about 20. In another embodiment, the ISBM articles generally include a propylene based random copolymer formed from a Ziegler-Natta catalyst including a succinate internal donor.

Abstract: Polymer compositions and articles formed therefrom are described herein. The compositions include a random copolymer and a radiation additive, wherein the random copolymer includes propylene and less than 2 wt. % ethylene and exhibits a melt flow rate of from about 30 to 100 dg/min., the polymer composition exhibits a flexural modulus of from about 160 kpsi to about 200 kpsi and the polymer composition is adapted to produce a polymer article exhibiting low plate out, a haze at 20 mils of no greater than 15%, radiation stability and autoclavability.

Abstract: Methods of forming a clear packaging container, polymers for use therein and packaging containers are described herein. The methods generally include providing a propylene based polymer formed from a metallocene catalyst; blending the propylene based polymer with a nonitol-based clarifying agent to form clarified polypropylene; and forming the clarified polypropylene into a packaging container, wherein the packaging container exhibits a gloss that is at least 6% greater than a container formed from a Ziegler-Natta formed propylene based polymer blended with the clarifying agent.

Abstract: Polymer compositions and articles formed therefrom are described herein. The compositions include a random copolymer and a radiation additive, wherein the random copolymer includes propylene and less than 2 wt. % ethylene and exhibits a melt flow rate of from about 300 to 100 dg/min., the polymer composition exhibits a flexural modulus of from about 160 kpsi to about 200 kpsi and the polymer composition is adapted to produce a polymer article exhibiting low plate out, a haze at 20 mils of no greater than 15%, radiation stability and autoclavability.

Abstract: Polymer articles and processes of forming polymer articles are described herein. The processes generally include providing a propylene based polymer formed from a metallocene catalyst and melt processing the propylene based polymer to form a polymer article.

Abstract: Injection stretch blow molded (ISBM) articles and processes for forming the same are described herein. The articles include a propylene based polymer having a melt flow rate of less than 10 g/10 min.

Abstract: A method of preparing a thermoformed article which is relatively isotropic in terms of shrinkage of the final thermoformed article along the sheet extrusion flow path (the longitudinal direction) and the transverse direction. The article is prepared from an isotactic polypropylene produced by the polymerization of propylene with an isospecific metallocene catalyst. The polymer has a melt flow rate within the range of 1-5 grams/10 minutes and a melting temperature of no more than 160° C. The polypropylene is extruded to provide a sheet which is oriented in at least one direction and has a thickness of 10-100 mils. The sheet is heated to a temperature of 135-160° C, and thermoformed in contact with a template having the desired configuration to produce the thermoformed article. The thermoformed article is then cooled and retrieved from the template to arrive at the final product.

Abstract: A polypropylene material may be prepared from a blend of heterophasic propylene copolymers and propylene homopolymers. The material may be prepared by blending the polymers while they are in a molten state, and forming a film or sheet from the polymer blend. The materials may also be formed as coextruded materials or as ternary blends with a polyethylene or a single phase random propylene copolymer. The blends and neat polymers have particular application to forming slit film tapes and similar materials. The resultant materials may exhibit increased tenacity, elongation and toughness and greater surface roughness as compared to those materials prepared solely from propylene homopolymers.

Abstract: A polymer blend and a method of making the same are provided. The polymer blend includes an ethylene-propylene (C2-C3) random copolymer and a modifier selected from the group consisting of a metallocene-catalyzed polyethylene-based copolymer, a metallocene-catalyzed polyethylene-based terpolymer, and a syndiotactic polypropylene homopolymer. The polymer blend may also include an organic peroxide for visbreaking the polymer blend. An end use article is made from the foregoing polymer blend. The end use article may be, for example, a film, an injection molded article, a compression molded article, a thermoformed article, and a fiber. The end use article is desirably a film having an Elmendorf tear strength of at least about 300 g/ply in the machine and transverse directions.

Abstract: A polymer blend and a method of making the same are provided. The polymer blend includes an ethylene-propylene (C2–C3) random copolymer and a modifier selected from the group consisting of a metallocene-catalyzed polyethylene-based copolymer, a metallocene-catalyzed polyethylene-based terpolymer, and a syndiotactic polypropylene homopolymer. The polymer blend may also include an organic peroxide for visbreaking the polymer blend. An end use article is made from the foregoing polymer blend. The end use article may be, for example, a film, an injection molded article, a compression molded article, a thermoformed article, and a fiber. The end use article is desirably a film having an Elmendorf tear strength of at least about 300 g/ply in the machine and transverse directions.

Abstract: Bicomponent fibers of syndiotactic polypropylene and ethylene-propylene random copolymer, can be prepared. The bicomponent fibers may exhibit self-crimp properties and high shrinkage characteristics.

Abstract: Alicyclic carboxylates, such as alicyclic norbonane sodium dicarboxylate, may be used in relatively small amounts as crystallization nucleating agents for foamed polypropylene. The alicyclic carboxylates give improved cell structures at lower proportions than conventional crystallization nucleating agents. The use of alicyclic carboxylate crystallization nucleating agents together with conventional nucleating agents may help give lower density polypropylene foams across a broader melt temperature range.

Abstract: Bicomponent fibers of syndiotactic polypropylene and ethylene-propylene random copolymer, can be prepared. The bicomponent fibers may exhibit self-crimp properties and high shrinkage characteristics.

Abstract: The present invention provides a die holder with one or more pre-located recessed areas or voids into which cutting dies can be quickly and easily inserted and secured. The die holder mounts quickly to the cylinder, and can be quickly removed for alternative operations. The die holder can be made according to the operator needs for different types, sizes and positions of dies. Unused voids can be filled with ‘blank’ blocks to achieve a consistent or uniform surface height for the full 360 degree area of the die cylinder. The present invention further provides a removable scrap control apparatus that is not attached permanently to the die cylinder on which it is used, which permits the use of a multiple blade die or a plurality of single blade dies on the same die cylinder without requiring permanent holes, slots or other means to accommodate the scrap control apparatus on the die cylinder or anvil cylinder.

Abstract: A polymer blend and a method of making the same are provided. The polymer blend includes an ethylene-propylene (C2-C3) random copolymer and a modifier selected from the group consisting of a metallocene-catalyzed polyethylene-based copolymer, a metallocene-catalyzed polyethylene-based terpolymer, and a syndiotactic polypropylene homopolymer. The polymer blend may also include an organic peroxide for visbreaking the polymer blend. An end use article is made from the foregoing polymer blend. The end use article may be, for example, a film, an injection molded article, a compression molded article, a thermoformed article, and a fiber. The end use article is desirably a film having an Elmendorf tear strength of at least about 300 g/ply in the machine and transverse directions.

Abstract: Bicomponent fibers of syndiotactic polypropylene and ethylene-propylene random copolymer, can be prepared. The bicomponent fibers may exhibit self-crimp properties and high shrinkage characteristics.