Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work
Patent
1985-06-17
1987-10-27
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
26421114, 26421115, 264237, 264348, D01D 5092
Patent
active
047028718
ABSTRACT:
A thermoplastic polymer is melt-spun into a spinning tube decompressed to not more than 0.7 atm and withdrawn therefrom to the outer air through a narrow groove provided in a bottom sealing body which substantially seals the interior of the spinning tube from the outer air. The bottom sealing body is provided with a plurality of regulating chambers communicating with the groove, which chambers are controlled to have interior pressures of intermediate values between those of the spinning tube and the outer air, whereby the pressure pulsation of an air stream flowing into the interior of the spinning tube from the outer air through the groove can be avoided. This, in turn, ensures a smooth spinning operation and uniform yarn quality.
Hasegawa Katsumi
Nagayasu Tadahito
Ohno Michio
Umeda Kazuo
Lorin Hubert C.
Miller Austin R.
Silbaugh Jan H.
Toray Industries Inc.
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