Patent application number | Description | Published |
20090155614 | Polypropylene Materials and Method of Preparing Polypropylene Materials - 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. | 06-18-2009 |
20090156760 | Transforming process - 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. | 06-18-2009 |
20090186999 | Low melt flow rate (MFR) propylene based polymers for injection stretch blow molding - 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. | 07-23-2009 |
20100081743 | Polypropylene for Reduced Plate Out in Polymer Article Production Processes - 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. | 04-01-2010 |
20100098586 | Propylene Polymers for Lab/Medical Devices - 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. | 04-22-2010 |
20110305857 | MODIFIED POLYPROPYLENE FOR PACKAGING APPLICATIONS - 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. | 12-15-2011 |
Patent application number | Description | Published |
20080275180 | Radiation Resistant Polypropylene Materials - A polypropylene material is provided having increased radiation resistance compared to solely isotactic polypropylene. The material is formed by utilizing a syndiotactic polypropylene. The isotactic polypropylene may be an isotactic metallocene or Ziegler-Natta catalyzed polypropylene and may include an amount of syndiotactic polypropylene. The material may be used in forming a variety of materials that may undergo exposure to radiation, such as sterilization procedures using radiation. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. | 11-06-2008 |
20090076213 | Random Copolymers and Formulations Useful for Thermoforming and Blow Molding Applications - A composition that may be useful for thermoforming and blow molding applications comprises a metallocene catalyzed propylene-ethylene random copolymer having an ethylene content of from about 0.1 to about 1.5 weight percent based on the copolymer, and exhibits a flexural modulus of at least about 1,100 MPa, a haze of less than about 40 percent, a melt flow of from about 1.0 dg/min to about 3.0 dg/min, and a xylene solubles content from about 0.2 weight percent to about 1.0 weight percent based on the copolymer. A process for preparing the copolymer and articles prepared therefrom are also disclosed. The composition's properties may make it particularly desirable for applications such as bottles, syringes and containers such as those used for food and medical purposes. | 03-19-2009 |
20090087602 | Propylene based polymers for injection stretch blow molding - 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. | 04-02-2009 |
20100160533 | Mini-Random Copolymer Resins having Improved Mechanical toughness and Related Properties Suitable for Thin Wall Thermoforming Applications - Propylene random copolymer compositions are described herein. The compositions generally include a propylene random copolymer including from about 95.0 wt. % to about 99.0 wt. % propylene and from about 0.2 wt. % to about 0.8 wt. % ethylene, an additive selected from clarifiers, nucleators and combinations thereof and a stabilizer, wherein the propylene random copolymer exhibits a melt flow rate of from about 0.5 g/10 min. to about 4.0 g/10 min., a molecular weight distribution of from 5 to 10 and wherein the propylene random copolymer composition exhibits a flexural modulus of from about 180,000 psi to about 260,000 psi. | 06-24-2010 |
20100249354 | INJECTION STRETCH BLOW MOLDED ARTICLES AND SYNDIOTACTIC POLYMERS FOR USE THEREIN - Injection stretch blow molded (ISBM) articles and methods of forming the same are described herein. The ISBM articles generally include a syndiotactic propylene-based polymer. | 09-30-2010 |