Gulf Oil Corporation

By Joseph Phelp, Executor

Clarence R Murphy

Robert E Boehme, Deceased

By Helen Boehme, Legal Representative

Apparatus useful in the manufacture of thermoplastic Olefin polymer fibrils are prepared by a process carried out in a disc mill. A hot olefin polymer solution is fed into the working cavity defined by the discs. In passing through the working cavity, the hot polymer solution is broken up into a plurality of uniaxially-oriented liquid streams which follow tortuous liquid paths through the working cavity whereby each of the streams is attenuated to orient the solute polymer molecules in said streams. A coolant liquid is fed into the working cavity and cools the attenuated polymer streams to a temperature sufficiently low so that substantially all of the solute polymer is precipitated in the form of uniaxially-oriented polymer fibrils. The product recovered from the modified disc mill consists of a mixture of uniaxially-oriented polymer fibrils, polymer solvent, and coolant liquid. The fibrils are recovered and refined in subsequent downstream operations.

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Norristown, PA, United States of America

By Joseph Phelp, Executor