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Microencapsulation As An Alternative To Emulsification For Preparing As A For Use In Papermaking, William J. Corriveau
Microencapsulation As An Alternative To Emulsification For Preparing As A For Use In Papermaking, William J. Corriveau
Masters Theses
The sizing chemical ASA is emulsified to make i t compatible with the papermaking process. Unfortunately, emulsified ASA is chemically reactive with water at the elevated temperatures found in papermaking systems. As an alternative, encapsulated ASA was made and investigated for its stability towards water at elevated temperatures.
A handsheet procedure was developed to analyze emulsified and encapsulated ASA. It was concluded that the procedure gave statistically reproducible results. Investigations with the procedure revealed important variables concerning the laboratory and m ill application of ASA. Evidence indicated that retention of ASA was critical to sizing development.
Encapsulated ASA made for …