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 Expert  722395

Expert in Chemical Plant Manufacturing, Process Development, Polyester Polymer, Polyester Film Coating

Available for your Consulting and Expert Witness Needs

Arizona (AZ)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness

Summary of Expertise: Listed with other top experts in: 
Expert has extensive experience working in chemical plant manufacturing at several DuPont facilities: Niagara Falls, NY; Victoria, TX; Savannah River, SC; Cape Fear, NC; Sabine River, TX; and Florence, SC. He has always worked in a technical role in manufacturing and specialized in yield and quality improvements. His other duties included supervising the startup of new equipment, troubleshooting day-to-day problems and training technicians. He has experience in the following processes: dodecanedioic acid, adipic acid, dimethylterephthalate (DMT), terephthalic acid (TPA), adiponitrile (ADN), Surlyn™ ethylene copolymer, Mylar™, and Cronar™. Expert solved major, chronic problems in both the Mylar™ and Cronar™ processes. He developed a new additive process that was strategic to saving the Mylar™ video base business as well as significantly reducing the cost of manufacture. For this he received a $10,000 award from the corporate vice president. He discovered a new coating formulation for Cronar™, which resulted in yield savings, eliminated a toxic air emission, and a fire/explosion hazard. Expert received a Safety, Health, and Environmental Award for this achievement.

A major role during Expert' career with DuPont was process troubleshooting. This included everything from solving day-to-day problems to tackling problems requiring more long-term solutions. Day-to-day problems included process upsets, equipment issues, safety issues, operator errors, and quality control. During his last 12 years with DuPont in the Mylar™ and Cronar™ plants, process troubleshooting required about 50% of his time. An expert knowledge of the Cronar™ polymer process was required to perform the needed troubleshooting. For example, a major crisis was averted when a plugged spray condenser was diagnosed as being the cause of a process upset that was overloading waste treatment. The Cronar™ plant was only two hours away from having to shut down when he identified the problem and had it corrected. As an example of longer-range troubleshooting, Expert was instrumental in identifying and measuring the yield losses in the ADN Plant. This eventually resulted in a yield improvement program. Expert worked for six years in the Cronar coating area and has extensive experience in troubleshooting film coating problems.

Expert has 30 years experience with plant testing at DuPont as a plant technical engineer. During this time, he took courses in the strategy of experimentation, which is used to design plant tests. While at DuPont, he wrote experimental operating directions (EOD) and test authorizations (TA) for the purpose of process optimization and improved quality. Experimental procedures included test objective, background summary, operating directions and lab instructions. The tests most often had technical coverage. A closing report would then be written to summarize the results and document the test conclusions. Examples of Expert' plant testing at DuPont include: optimization of the TPA reactors via adjusting reactor conditions and reduced catalyst consumption via increased mother liquor recycling; improving ADN yield via plant optimization; improving Mylar™ film quality and improved Mylar™ polymer filter life via high efficiency additive filtration; and, improving Cronar™ coating yields via new coating formulations and air knife coater adjustments. In addition, while consulting at Inter-Cal Nutraceuticals, he did extensive testing at the mixer/reactor vendor's location to establish new operating parameters for the manufacture of Ester-C.


chemical plant manufacturing


chemical process troubleshooting


plant test

Expert has six years' experience with DuPont Cronar polyester film coating and film drying. His expertise includes aqueous coating formulations of resin (polyvinylidene chloride), gelatin, and antistatic substrates. He is very knowledgeable of roll coaters and air-knife coaters. Expert' work in polyester film coating included optimizing coater parameters, troubleshooting coating problems, coated film quality improvements, coated film yield improvements, raw materials improvements and specifications, working with raw material vendors, working with coater vendors, coater training, writing coater operating procedures, analyzing coated film quality, conducting coater tests, and developing new coating formulations. While working with Cronar™, Expert was instrumental in increasing the PASS (permanent antistatic substrate) quality yield from 70% to 90% by modifying the coating equipment, procedures, and raw materials. This resulted in more than one million dollars in savings annually. Also, Expert discovered a new Cronar™ gelatin coating formulation that reduced the coater cleanup frequency from once per day to once per week. This resulted in yield savings of $350,000 annually as well as eliminating a toxic air emission (ethanol) and eliminating a potential fire/explosion hazard. This new formulation replaced a 30-year-old formulation and was implemented company-wide. He received a Safety, Health, and Environmental Award for this achievement. Expert has also worked with slip additives in coatings for improved film winding and film handling. He is knowledgeable of the different types of slip additives, how the slip additives are prepared, and what concentrations to use in the coating solution.

During his 30-year career with DuPont, Expert was involved with many quality improvement programs. He conducted tests and implemented projects to improve quality. He worked with lab personnel to improve quality test methods, develop quality control procedures, and develop quality specifications. He took PQM (Product Quality Management) courses at the DuPont Sabine plant and is knowledgeable of PQM procedures. Expert worked at the Sabine plant to reduce the moisture and gel levels in DuPont Surlyn™. This was important to the ethylene copolymers business in order to maintain market share. At Florence, he developed a new slip additive filtration process for Mylar™ video base film. The "microspeck" level was reduced to almost zero by removing the slip additive particles greater than one micron. This enabled DuPont to sell video base film to Sony and eventually form a partnership with Teijin. This breakthrough technology was strategic to saving the Mylar™ video base film business, and it was adopted company wide. Also, the Mylar™ film color control was greatly improved by working with the vendor to improve the consistency of the color additives (blue and purple dyes). With Cronar™, several quality improvements were made to the PASS (permanent antistatic substrate) film quality. PASS "streaks" were reduced by making improvements to the PASS coater and to the PASS coating solution. PASS film "haze" was eliminated by working with the vendor to improve the quality of the main ingredient in the PASS solution. PASS film "dots" were eliminated by installing "electrostatic discharge" or ESD treater equipment upstream of the PASS coater. Much testing was done over a period of six years in the Cronar™ area to make these improvements. In addition, he has worked with vendors to improve the quality of raw materials.


polyester film coating process


quality improvement

During his 30-year career with DuPont, Expert was active in making yield improvements in the following processes: adipic acid via optimization of the adipic reactor conditions, terephthalic acid (TPA) via optimization of TPA reactor conditions and recycle of waste streams, adiponitrile (ADN) via identification and reduction of waste streams as well as ADN reactor optimization, Mylar™ film yield and Cronar™ film yield via major quality improvements. Yield improvements required expertise in plant testing, equipment modification, and/or project implementation. Expert conducted a series of plant tests at the TPA Cape Fear plant to determine the reactor conditions (pressure, temperature, and catalyst level) that would result in the highest paraxylene yield to TPA. TPA is a key ingredient in the manufacture of polyester fiber and this yield improvement was significant in the cost of polyester manufacture. Expert installed composite samplers at the ADN plant at Sabine on all waste streams to first determine the sources and extent of each yield loss. Once the sources were identified, appropriate action was taken to minimize each loss. Yield accounting procedures were then put in place so that a daily yield and month-to-date yield could be established for the ADN plant. Eventually, the yield accounting system was computerized and reports were distributed each day. At Florence, the Cronar™ PASS film yield was improved from 70% to 90% by modifying the coating equipment, installing new ED treaters, improving procedures, and improving the quality of raw materials.

During his 12 years at the Florence DuPont Plant, Expert installed several particle filtration systems in the Mylar™ and Cronar™ processes. Both Mylar™ and Cronar™ use several additives. These include slip additives, color control additives, and catalyst additives, all of which must be filtered. His expertise includes knowing what type of filter to use and how it should be installed in the process. He has experience with cartridge filters and with bag filters. He has worked with many particle filtration vendors including 3M, one of the leading producers of filters designed for separating particles from liquid streams. Most notable of his work was the installation of the "high efficiency" additive filtration system in the Mylar™ polymer area. This 3M filtration system was able to perform a very difficult particle separation in that slip additive particles greater than one micron were removed from the additive stream using 3M's new technology. This particle filtration system was so successful that the quality of the Mylar video base film went from poor to extremely good due to the elimination of "microspecks" in the film. This allowed DuPont to sell video base film to Sony and to maintain a strong market share in the video base film business. Also, as a corollary benefit, the polymer filter life was increased substantially by removing the oversized slip additive particles before the slip additive was injected into the polymer stream. Expert is also knowledgeable in polymer filtration. He has experience with metal cartridge filters that are used to remove particles from the polymer stream and also with the cleaning of these filters. He has worked with polymer filtration vendors to procure filter cartridges for Mylar™ and Cronar™ polyester.


yield enhancement


particle filtration

Expert has 12 years' experience with the production of polyester polymer while working at the Florence DuPont Plant. He spent four years in the Mylar™ plant and eight years in the Cronar™ plant. His expertise includes the polymer equipment, the procedures, startups and shutdowns, the process, training, troubleshooting, and quality control. Also, he is knowledgeable in polyester chemistry, and has a strong background in terephthalic acid (TPA) and dimethyl terephthalate (DMT) which are key raw materials for polyester. The polyester polymer in Cronar™ was used to produce both film and pellets. Both were used internally by DuPont. His work experiences with Mylar™ and Cronar™ were focused on improving the polyester yield and quality. He was instrumental in installing several projects during his years with Cronar™ including a new polymer pelletization process and new equipment that was used to improve the polymer color. During his years in both Mylar™ and Cronar™, Expert was a mentor to new engineers and operators. He wrote training modules and conducted training classes for new operators.

Expert graduated from the University of Arizona with an M.S. degree in chemical engineering in 1968. During his 30-year career with DuPont he applied his academic training at six different manufacturing sites while working on ten different processes: sodium, dodecanedioic acid (DDDA), adipic acid, plutonium, dimethylterephthalate (DMT), terephthalic acid (TPA), adiponitrile (ADN), Surlyn ethylene copolymer, Mylar, and Cronar. Knowledge of all the unit operations was applied during his career in manufacturing. Before his retirement in 1997 he had attained the level of Senior Technical Associate at the Florence, South Carolina plant. As a chemical engineer he worked in a technical role and specialized in process development programs leading to yield enhancement and quality improvement. He also has expertise in plant testing, process troubleshooting, and plant startups and shutdowns. Expert is very results oriented and enjoys solving process problems.




polyester thin film


polyester production


chemical engineering


manufacturing procedure

Show Secondary and Basic Areas of Expertise
Expert may consult nationally and internationally, and is also local to the following cities: Phoenix, Arizona;  Mesa, Arizona;  Glendale, Arizona;  Scottsdale, Arizona;  Chandler, Arizona;  Tempe, Arizona;  Gilbert, Arizona;  Peoria, Arizona;  and Flagstaff, Arizona.

Often requested
with this expert:

Web Coating Technology and Process Scale-Up
Polymer Synthesis and Properties, Catalysis,...
Oil & Gas/ LNG/ Chemical Project Development & Management;...
Chemical Process and Design

Year   Degree   Subject   Institution  
1968   M.S.   Chemical Engineering   University of Arizona  
1964   B.S.   Chemical Engineering   Pratt Institute  

Work History:
Years   Employer   Department   Title   Responsibilities

2003 to





Part-Time Consultant


Expert is a retired DuPont chemical engineer working as a part-time consultant.

2001 to 2001


Inter-Cal Nutraceuticals



Part-Time Consultant


Expert worked on process development using new equipment to manufacture larger batches of Ester-C. He worked with an equipment vendor to develop new operating parameters for the Prescott site. This involved extensive testing at the vendor's location using a small scale mixer/reactor.

2000 to 2000


Yavapai Community College




Lab Instructor


He worked as a chemistry lab instructor for the freshman class. Instruction included theory, equipment setup, procedures, and determination of results from lab data.

1997 to 2000





Part-Time Consultant


Expert' assignments included work to improve polyester film processing at Gaware in India. He recommended the use of a slip additive in the film coating, which solved their problem.

1966 to 1997


E.I. DuPont de Nemours, Inc.


Nylon Intermediates and Films


Senior Technical Associate


During his 30-year career with Dupont, Expert worked in manufacturing process development to improve safety, environmental, yields and quality while reducing costs. He worked at six different Dupont locations and on ten different processes during his career.

Career Accomplishments:

Expert received a $10,000 cash award in 1988 from the DuPont corporate Vice President for developing a new additive filtration process. This was strategic to saving the Mylar video base film business.

He also received the Safety, Health and Environmental Award in 1995 for the discovery of a new Cronar film coating formulation.

Publications and Patents Summary

All of Expert' publications while working for DuPont were for internal use only and not published outside the company.

Government Experience:
Years   Agency   Role   Description
1972 to 1974   Atomic Energy Department   Reactor Area Engineer   Expert worked at the Savannah River plant as a DuPont employee. His duties included the operation and safety of a K-Reactor.

Consulting Services:
Selected Consulting Examples:
  • Expert worked with a mixer/reactor vendor to develop new operating parameters using new equipment for the production of larger batches of Ester-C, a vitamin supplement, at Inter-Cal Nutraceuticals.
  • He helped to develop a new carbonate analyzer at Inter-Cal. A reliable test was needed to properly evaluate the new mixer/reactor.
Recent Client Requests:
  • Expert in plant management for consulting on maintenance and engineering of major chemical companies.
  • Expert for consulting on production of ADN to assist with new plant scale up and formulation.
  • Expert in Booz Allen Hamilton.
  • Medical packagin expert for consulting on Failure mode analysis with Mylar.
  • Gelatin chemistry expert for consulting on Gelatin injection molding.
  • Expert in biaxially oriented blown polystyrene film for consulting on increasing output, reducing gauge variance, increasing mill roll width and increasing orientation on existing blown film lines.
  • Expert in polyester film in Arizona for consulting on new product development.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Recent Litigation Client Requests:
  • Expert in Mylar service life testing for consulting on service life of Mylar coating on electrical busway system.
  • Ethylene processing plant expert for consulting on management of change.
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

International Experience:
Years   Country / Region   Summary
1999 to 2000   India   Expert improved polyester film processing at Gaware. He recommended the use of a slip additive in the polyester coating which solved the film handling and winding problems.

Language Skills:
Foreign Language   Description
Spanish   Expert can speak and read Spanish at a basic level. He had three years of Spanish in school.

Additional Skills and Services:

Expert developed training seminars at DuPont for training new engineers and operators. The training modules included process description, procedures, maintenance shutdown/startups, and more.

Supplier and Vendor Location and Selection

He has vast experience working with vendors both during his DuPont career and consulting, especially in polyester polymer and polyester film manufacture.

Other Skills and Services

Expert solved major, chronic quality and yield problems at DuPont. He has expertise in implementing quality control and safety programs.


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