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Polaroid has improved the design of reactor mixing tanks by using computer simulation to evaluate the shearing, orientation and the circulation of the fluid under alternate mixer designs. The turbulent mixers used in the past do not work well with the new high‐viscosity photographic reagents...
Changes in regulations aiming at reducing the impact that technologies such as coatings, adhesives, cleaners have on the environment is leading to large advances in these end‐use technologies. In achieving the required quality of the end product, and irrespective of whether this is in areas such...
The current size of individual particles in most pigments is usually below 1ॖm; this ensures powerful forces of attraction causing the particles to cling to one another forming aggregates. If pigment dispersion stability is not appropriate, particles join again and form flocculates. It is...
A procedure described in a new Nordtest method NT POLY 176 has been shown to determine relatively easily whether or not a surface is clean. One simply applies a well‐chosen droplet of liquid and observes whether or not it spreads. If it spreads the surface can be considered clean.
Melt filtration systems are widely employed across polymer production industries. It is common for the filters used in such systems to be chemically cleaned and reinstalled for repeat process application. These “regenerable” filters can be characterised by their performance and reliability and...
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