General Electric Company

Arthur Joseph Osborn

James P Barren

Sandra F Feldman

Andrew Joseph Poslinski

John Frederick Graf

Hua Wang

Vicki Herzl Watkins

Kena Kimi Yokoyama

Harsha Mysore Hatti

Craig Alan Cantello

James Louis Cifarelli

Grigoriy Aleksandrovich Shmigol

Fred Fuh-Sheng Chen

A spatially-resolved spectrometer is used to measure streaking in molded sample plastic parts produced using a molding tool with various mold inserts which produce certain desired topological surface features upon these sample plastic parts. The measurements from one or more of these sample plastic parts are then provided to a computerized device which appropriately filters the data and calculates overall data shape, average peak and valley shift, and a quality number indicative of data slopes. These calculations are then used to determine an optimum set of ingredients and processing conditions to be used for the full-scale plastic part production.

System and method to quantify appearance defects in molded plastic parts

Using the molding tool ( ), spatially-resolved spectrometer ( ) and computerized device ( ) of U.S. patent application Ser. No. 09/303,409, streaking problems identified in production are first diagnosed ( ), then duplicated on a laboratory scale ( ) and compared with the streaking problems observed in production. Next, options are developed and tested for fixing (correcting) the observed problem and testing these on a laboratory scale ( ). Finally, the option(s) chosen for correcting the observed problem are validated prior to reinitiating full-scale production ( ).

Method and apparatus for resin formulations with improved streaking performance

Thermoplastic resin compositions containing an aromatic polycarbonate resin and a surface modified titanium dioxide having a first coating and no further coatings are disclosed. The compositions may include a rubber modified graft copolymer comprising a discontinuous rubber phase dispersed in a continuous rigid thermoplastic phase, wherein at least a portion of the rigid thermoplastic phase is chemically grafted to the rubber phase; a rigid copolymer; a fluoropolymer; and/or a flame retarding amount of an organophosphorus flame retardant. Preferred titanium dioxide include first coating materials of polyols or polysiloxanes. The thermoplastic resin compositions exhibit improved resistance to streaking compared to such thermoplastic resin compositions which incorporate titanium dioxide having a first coating and at least one additional coating.

Polycarbonate resin blends containing titanium dioxide

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Catskill, NY, United States of America

Arthur Joseph Osborn