Patents by Inventor William R. Wheat
William R. Wheat has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20110244750Abstract: Bicomponent fibers, methods of forming bicomponent fibers and articles formed from bicomponent fibers, are described herein. The bicomponent fibers generally include a sheath component and a core component, wherein the sheath component consists essentially of a first metallocene polypropylene and the core component consists essentially of a second metallocene polypropylene.Type: ApplicationFiled: June 13, 2011Publication date: October 6, 2011Applicant: Fina Technology, Inc.Inventors: John Bieser, Guillaume Pavy, Hughes Haubruge, Alain Sandaert, William R. Wheat
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Patent number: 8007699Abstract: Bicomponent fibers, methods of forming bicomponent fibers and articles formed from bicomponent fibers are described herein. The bicomponent fibers generally include a sheath component and a core component, wherein the sheath component consists essentially of a first metallocene polypropylene and the core component consists essentially of a second metallocene polypropylene.Type: GrantFiled: August 20, 2008Date of Patent: August 30, 2011Assignee: Fina Technology, Inc.Inventors: John Bieser, Guillaume Pavy, Hughes Haubruge, Alain Sandaert, William R. Wheat
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Publication number: 20100047571Abstract: Bicomponent fibers, methods of forming bicomponent fibers and articles formed from bicomponent fibers are described herein. Tile bicomponent fibers generally include a sheath component and a core component, wherein the sheath component consists essentially of a first metallocene polypropylene and the core component consists essentially of a second metallocene polypropylene.Type: ApplicationFiled: August 20, 2008Publication date: February 25, 2010Applicant: Fina Technology, Inc.Inventors: John Bieser, Guillaume Pavy, Hughes Haubruge, Alain Sandaert, William R. Wheat
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Publication number: 20090149605Abstract: Fibers and articles formed therefrom are described herein. The fibers generally include a first polymer including a first propylene based impact copolymer and a second propylene based polymer.Type: ApplicationFiled: December 7, 2007Publication date: June 11, 2009Applicant: Fina Technology, Inc.Inventors: Fengkui Li, Likuo Sun, William R. Wheat, John O. Bieser
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Publication number: 20090029098Abstract: Slit films and processes of forming the same are generally described herein. In one embodiment, the slit films include an impact copolymer (ICP) formed of polypropylene and less than about 8 wt. % total ethylene, wherein the slit film exhibits less shrinkage and higher tenacity than a slit film formed from an ICP having greater than 10 wt. % ethylene. In one embodiment, the slit films include an impact copolymer including propylene and ethylene, wherein the slit film is absent another polymer.Type: ApplicationFiled: July 18, 2008Publication date: January 29, 2009Applicant: Fina Technology, Inc.Inventors: John Ashbaugh, William R. Wheat
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Patent number: 7026055Abstract: The present invention relates to the improvement of metal bond strength in polypropylene films surface treated at higher levels through the addition to the basic isotactic polypropylene (iPP) polymer of an amount of syndiotactic polypropylene (sPP) in an amount no more than about 10 percent by weight and preferably in an amount between about 0.5 percent and about 8 percent by weight. The invention encompasses both the resulting metallized polypropylene films with enhanced bond strength and the process for producing such films. The prescribed use provides improved bonding properties over a simple non-blended isotactic polypropylene homopolymer, while maintaining at acceptable levels the optical and physical characteristics of a film made from non-blended iPP homopolymer. At increasing percentages of sPP above the preferred levels, bond strength continues to increase, but a deterioration in other properties may be noted, particularly in the optical property haze.Type: GrantFiled: October 25, 2002Date of Patent: April 11, 2006Assignee: Fina Technology, Inc.Inventors: Aiko Hanyu, William R. Wheat
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Patent number: 6803094Abstract: The present invention is for the improvement of inter-layer bonding strength in polypropylene films through the addition of ethylene as a mini-random copolymer in an amount of no more than about 1 weight percent, more preferably no more than about 0.7 weight percent, and most preferably between about 0.3 weight percent to about 0.5 weight percent or even amounts less than about 0.2 weight percent. The invention allows the improvement of inter-layer bond strength in multi-layer films resulting specifically in improved heat seal strength. The invention encompasses both the resulting films with enhanced heat seal strength and the process for producing such films.Type: GrantFiled: October 6, 1999Date of Patent: October 12, 2004Assignee: Fina Technology, Inc.Inventors: William R. Wheat, Aiko Hanyu
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Patent number: 6765068Abstract: Polypropylene heterophasic copolymers are produced having increased impact strength through the use of controlled rheology techniques by the addition of a peroxide at conditions which increase the deactivation or half life of the peroxide. The increased half life slows down the vis-breaking process and allows better dispersion of rubber particles within the polymer. In this way, copolymers having a high melt flow can be prepared while obtaining high impact strength and lower stiffness values, without the need for additional elastomeric modifiers.Type: GrantFiled: May 30, 2003Date of Patent: July 20, 2004Assignee: Fina Technology, Inc.Inventors: Lisa K. Albe, William R. Wheat, Jeff Nairn, Scott Cooper, Philippe VanDeurzen, Michel Daumerie
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Publication number: 20040021251Abstract: The present invention relates to improved processability of polyolefin films through the addition to the basic isotactic polypropylene (iPP) polymer of a resin or rosin modifier in an amount within the range of 1 to 30 weight percent. Alternatively, the composition could contain from about 5 to about 10 weight percent of a resin or rosin. Preferably the mixture should contain resin or rosin modifiers in an amount of about 10 percent by weight. The invention encompasses both the resulting polyolefin films and the process for producing such film. The improved processability of the film includes fewer web breaks and drawability at higher line speeds, resulting in fewer shut downs of the processing line and a decrease in manufacturing time. These improvements are measured in terms of variable machine direction orientation draw ratios and transverse direction orientation oven temperatures.Type: ApplicationFiled: July 29, 2003Publication date: February 5, 2004Inventors: William R. Wheat, Aiko Hanyu
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Publication number: 20030208007Abstract: Polypropylene heterophasic copolymers are produced having increased impact strength through the use of controlled rheology techniques by the addition of a peroxide at conditions which increase the deactivation or half life of the peroxide. The increased half life slows down the vis-breaking process and allows better dispersion of rubber particles within the polymer. In this way, copolymers having a high melt flow can be prepared while obtaining high impact strength and lower stiffness values, without the need for additional elastomeric modifiers.Type: ApplicationFiled: May 30, 2003Publication date: November 6, 2003Applicant: Fina Technology, Inc.Inventors: Lisa K. Albe, William R. Wheat, Jeff Nairn, Scott Cooper, Philippe VanDeurzen, Michel Daumerie
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Patent number: 6630245Abstract: Provided is polyolefin-based compound, resin, mixture, or combinations thereof, providing products having reduced coefficient of friction, comprising: A) polyolefin other than syndiotactic poly-&agr;-olefin; B) about 0.1% to about 70% syndiotactic poly-&agr;-olefin; and C) about 0.01% to about 5% of: slip agent, anti-block agent, or combinations thereof; as well as process for producing the same.Type: GrantFiled: February 23, 2000Date of Patent: October 7, 2003Assignee: Fina Technology, Inc.Inventors: Likuo Sun, Edwar Shoukri Shamshoum, William R. Wheat, Paul Buras
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Patent number: 6610792Abstract: Polypropylene heterophasic copolymers are produced having increased impact strength through the use of controlled rheology techniques by the addition of a peroxide at conditions which increase the deactivation or half life of the peroxide. The increased half life slows down the vis-breaking process and allows better dispersion of rubber particles within the polymer. In this way, copolymers having a high melt flow can be prepared while obtaining high impact strength and lower stiffness values, without the need for additional elastomeric modifiers.Type: GrantFiled: July 26, 2001Date of Patent: August 26, 2003Assignee: Fina Technology, Inc.Inventors: Lisa K. Albe, William R. Wheat, Jeff Nairn, Scott Cooper, Philippe VanDeurzen, Michel Daumerie
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Publication number: 20030134965Abstract: Provided is polyolefin-based compound, resin, mixture, or combinations thereof, providing products having reduced coefficient of friction, comprising:Type: ApplicationFiled: February 23, 2000Publication date: July 17, 2003Inventors: Likuo Sun, Edwar Shoukri Shamshoum, William R Wheat, Paul Buras
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Patent number: 6579962Abstract: A process for the production of biaxially-oriented polypropylene film involving the provision of a polypropylene polymer produced by the polymerization of propylene in the presence of a metallocene catalyst characterized by a bridged racemic bis(indenyl) ligand substituted at the proximal position. The polypropylene contains 0.5 to 2% 2,1 insertions and has an isotacticity of at least 96% meso pentads and at least 99% meso diads. The film is formed by stressing the polymer produced from a slot die in the machine direction at a stretch ratio of about 5 or 6 and in the transverse direction at a stretch ratio of about 8 or 9 to produce a biaxially-oriented film having a non-uniform melt temperature of a peak value of less than 160° C. The polypropylene polymer has meltflow index of less than 5 grams per 10 minutes and has an average molecular weight within the range of 100,000-400,000 grams per mole.Type: GrantFiled: May 22, 2000Date of Patent: June 17, 2003Assignee: Fina Technology, Inc.Inventors: William R. Wheat, Aiko Hanyu
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Publication number: 20030104230Abstract: The present invention relates to the improvement of metal bond strength in polypropylene films surface treated at higher levels through the addition to the basic isotactic polypropylene (iPP) polymer of an amount of syndiotactic polypropylene (sPP) in an amount no more than about 10 percent by weight and preferably in an amount between about 0.5 percent and about 8 percent by weight. The invention encompasses both the resulting metallized polypropylene films with enhanced bond strength and the process for producing such films. The prescribed use provides improved bonding properties over a simple non-blended isotactic polypropylene homopolymer, while maintaining at acceptable levels the optical and physical characteristics of a film made from non-blended iPP homopolymer. At increasing percentages of sPP above the preferred levels, bond strength continues to increase, but a deterioration in other properties may be noted, particularly in the optical property haze.Type: ApplicationFiled: October 25, 2002Publication date: June 5, 2003Inventors: Aiko Hanyu, William R. Wheat
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Publication number: 20030069367Abstract: Polypropylene heterophasic copolymers are produced having increased impact strength through the use of controlled rheology techniques by the addition of a peroxide at conditions which increase the deactivation or half life of the peroxide. The increased half life slows down the vis-breaking process and allows better dispersion of rubber particles within the polymer. In this way, copolymers having a high melt flow can be prepared while obtaining high impact strength and lower stiffness values, without the need for additional elastomeric modifiers.Type: ApplicationFiled: July 26, 2001Publication date: April 10, 2003Inventors: Lisa K. Albe, William R. Wheat, Jeff Nairn, Scott Cooper, Philippe VanDeurzen, Michel Daumerie
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Patent number: 6395147Abstract: The present invention relates to the improvement of metal bonding strength in polypropylene films through the addition of ethylene in a mini-random ethylene-propylene copolymer in an amount of no more than about 1 weight percent, more preferably no more than about 0.7 weight percent, and most preferably between about 0.3 weight percent and about 0.5 weight percent, or even amounts between about 0.05 weight percent and about 0.2 weight percent. The invention allows the improvement of metal bond strength in metallizable films. The invention encompasses both the resulting films with enhanced metal bond strength and the process for producing such films.Type: GrantFiled: September 22, 1999Date of Patent: May 28, 2002Assignee: Fina Technology, Inc.Inventors: William R. Wheat, Aiko Hanyu
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Patent number: 6207093Abstract: The present invention relates to improved processability of polyolefin films through the addition to the basic isotactic polypropylene (iPP) polymer of a syndiotactic polypropylene (sPP) in an amount within the range of about 2 to 10 weight percent and of a resin or rosin modifier in an amount within the range of 1 to 30 weight percent. Preferably, the composition could contain syndiotactic propylene in an amount within the range of about 2 to 5 weight percent. Preferably, about 3 weight percent of syndiotactic propylene is present in the polyolefin composition. The resin or rosin modifier could, preferably, be present in an amount within the range of 5 to 10 weight percent. Preferably, the composition should contain about 10 weight percent of the modifier. The present invention encompasses both the resulting polyolefin films and the process for producing such films.Type: GrantFiled: April 24, 1998Date of Patent: March 27, 2001Assignee: Fina Technology, Inc.Inventors: Aiko Hanyu, William R. Wheat
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Patent number: 6090325Abstract: A process for the production of biaxially-oriented polypropylene film involving the provision of a polypropylene polymer produced by the polymerization of propylene in the presence of a metallocene catalyst characterized by a bridged racemic bis(indenyl) ligand substituted at the proximal position. The polypropylene contains 0.5 to 2% 2,1 insertions and has an isotacticity of at least 96% meso pentads and at least 99% meso diads. The film is formed by stressing the polymer produced from a slot die in the machine direction at a stretch ratio of about 5 or 6 and in the transverse direction at a stretch ratio of about 8 or 9 to produce a biaxially-oriented film having a non-uniform melt temperature of a peak value of less than 160.degree. C. The polypropylene polymer has meltflow index of less than 5 grams per 10 minutes and has an average molecular weight within the range of 100,000-400,000 grams per mole.Type: GrantFiled: September 24, 1997Date of Patent: July 18, 2000Assignee: Fina Technology, Inc.Inventors: William R. Wheat, Aiko Hanyu
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Patent number: 5997679Abstract: The present invention is for the improvement of inter-layer bonding strength in polypropylene films through the addition of ethylene as a mini-random copolymer in an amount of no more than about 1 weight percent, more preferably no more than about 0.7 weight percent, and most preferably between about 0.3 weight percent to about 0.5 weight percent or even amounts less than about 0.2 weight percent. The invention allows the improvement of inter-layer bond strength in multi-layer films resulting specifically in improved heat seal strength. The invention encompasses both the resulting films with enhanced heat seal strength and the process for producing such films.Type: GrantFiled: October 17, 1997Date of Patent: December 7, 1999Assignee: Fina Technology, Inc.Inventors: William R. Wheat, Aiko Hanyu