Alan Dale Forbes

US Patent:

55256678, Jun 11, 1996

Filed:

Aug 2, 1995

Appl. No.:

8/510370

Inventors:

Alan H. Forbes - Finksburg MD
Harry R. Sheets - Shortsville NY

Assignee:

Tenneco Plastics, Inc. - Evanston IL

International Classification:

B29C 5500
C08J 900

US Classification:

524490

Abstract:

A novel biaxially oriented polystrene sheet product and process for making the sheet. Oriented polystyrene sheet is prepared by melt extruding a polymer, such as styrenic resin having average molecular weight of at least 270,000, blended with a processing agent, such as mineral oil, to lower glass transition temperature of the resin by at least 10. degree. C. The cooled extruded sheet is biaxially oriented under reduced orientation load conditions and orientation temperature. In a preferred embodiment styrenic resin is blended with about 3-10 wt % paraffinic hydrocarbon oil, such as mineral white oil or the like, in the substantial absence of other additives to provide a clear, oriented polystyrene sheet product having high modulus and low haze.

US Patent:

55651631, Oct 15, 1996

Filed:

Jan 23, 1996

Appl. No.:

8/590165

Inventors:

Alan H. Forbes - Finksburg MD
Harry R. Sheets - Shortsville NY

Assignee:

Tenneco Packaging - Evanston IL

International Classification:

B29C 5500

US Classification:

2642902

Abstract:

A novel biaxially oriented polystrene sheet product and process for making the sheet. Oriented polystyrene sheet is prepared by melt extruding a polymer, such as styrenic resin having average molecular weight of at least 270,000, blended with a processing agent, such as mineral oil, to lower glass transition temperature of the resin by at least 10. degree. C. The cooled extruded sheet is biaxially oriented under reduced orientation load conditions and orientation temperature. In a preferred embodiment styrenic resin is blended with about 3-10 wt % paraffinic hydrocarbon oil, such as mineral white oil or the like, in the substantial absence of other additives to provide a clear, oriented polystyrene sheet product having high modulus and low haze.

US Patent:

D3815587, Jul 29, 1997

Filed:

Dec 29, 1995

Appl. No.:

D/048463

Inventors:

Robert J. Schaefer - Baltimore MD
Alan H. Forbes - Finksburg MD

Assignee:

Sweetheart Cup Company, Inc. - Owings Mills MD

International Classification:

0701

US Classification:

D 7531