Bobby Ray Gibson

US Patent:

7251959, Aug 7, 2007

Filed:

Dec 31, 2002

Appl. No.:

10/334441

Inventors:

Harry B. Cline - Heath OH, US
William E. Downey - Granville OH, US
Liang Chen - New Albany OH, US
Kathleen M. Bullock - Zanesville OH, US
Kevin S. Guigley - Granville OH, US
Yadollah Delaviz - Granville OH, US
William R. Cooper - Johnstown OH, US
Bobby R. Gibson - Newark OH, US
Michael P. Lewis - Newark OH, US
Michael V. Mager - Pickerington OH, US

Assignee:

Owens-Corning Fiberglas Technology, Inc. - Summit IL

International Classification:

C03B 37/07

US Classification:

65484, 134 10, 134 26, 134 28, 134 34, 134 41, 134 56 R, 134111, 134113, 65 42, 65376, 65502

Abstract:

A neutralization system for controlling the pH of the washwater used to clean and maintain polyacrylic bound glass forming equipment. The neutralization system introduces a base solution to a washwater solution when the pH of the washwater solution contained in a closed loop washwater recovery system falls below about 8. 5, thereby substantially reducing the corrosion rate of the components of the equipment associated with acidic polyacrylic acid binder, maleic acid cobinder or maleic anhydride cobinder and washwater solution. A closed-loop hoodwall washwater recovery system may also be introduced in addition to the neutralization system that allows for the recovery and reuse of polyacrylic acid binder and maleic acid cobinder or maleic anhydride cobinder with a minimal amount of base solution, thereby minimizing degradation of insulation properties of polyacylic acid bound glass fiber products.