Cleaning and liquid contact with solids – Apparatus – For work having hollows or passages
Patent
1998-09-15
1999-10-12
Stinson, Frankie L.
Cleaning and liquid contact with solids
Apparatus
For work having hollows or passages
134166R, 366138, B08B 304
Patent
active
059642319
ABSTRACT:
Systems and methods are provided whereby additive for thermoplastic materials may be recovered in a primary additive supply system simultaneously with the supply of an additive from a secondary additive supply system to a molten thermoplastic stream. Each of the primary and secondary additive supply systems is provided with respective recirculation lines so as to prevent sedimentation of the additive. According to the present invention, therefore, a protocol is employed whereby substantially all of the additive in the additive supply system, including that quantity of additive in the recirculation lines, may be recovered so that a fresh supply of additive (which oftentimes is different from the previous additive) may be connected for injection into the molten thermoplastic stream at the appropriate time.
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Holzer, Jr. Carl R.
Kight Daniel H.
Yon Dan R.
BASF Corporation
Stinson Frankie L.
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