Chemical Aging of Environmentally Friendly CleanersUse of cleaners in the manufacturing area demands bottles that will hold a sufficient amount of material and allow for easy and controlled dispensing by the operator without contamination or material leaching from the bottle. The manufacturing storage conditions are also a factor that may affect cleaner chemical integrity and its potential to leave a residue on the part. A variety of squeeze bottles stored in mild (72 F, 10% R.H., dark) and harsh (105 F, 50% R.H., fluorescent lighting) conditions were evaluated to determine the effect of environment and bottle exposure on ozone depleting chemicals (ODC) cleaners chemical composition. Low Density Polyethylene (LDPE) bottles were found to be quite permeable to all the cleaners evaluated in this study indicating this bottle type should not be used in the manufacturing area. Fluorinated Polyethylene (FLPE) bottles showed little cleaner loss and change in cleaner chemical composition over time suggesting these bottles would be acceptable for use. Chemical analysis indicates limonene containing cleaners show increased non-volatile residue (NVR) content with storage under harsh conditions. Some cleaners use BHT (butylated hydroxytoluene) as stabilizer and to protect against limonene oxidation. Under harsh conditions, BHT was quickly depleted resulting in higher NVR levels.
Biegert, L. L. (Thiokol Corp. Brigham City, UT United States)
Evans, K. B. (Thiokol Corp. Brigham City, UT United States)
Olsen, B. D. (Thiokol Corp. Brigham City, UT United States)
Weber, B. L. (Thiokol Corp. Brigham City, UT United States)
August 20, 2013
February 1, 2001
Publication: Proceedings of The 4th Conference on Aerospace Materials, Processes, and Environmental Technology
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IDRelationTitle20010067226Collected WorksProceedings of the 4th Conference on Aerospace Materials, Processes, and Environmental Technology