Process for direct production of low acetaldehyde packaging mate

Details Process for direct production of low acetaldehyde packaging mate Process for direct production of low acetaldehyde packaging mate

1995-08-23

1997-08-12

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Utilizing special inert gaseous atmosphere or flushing mold...

264102, 264211, 525425, 528274, 528280, 528286, 5283083, 5283088, 528483, B29C 4736, B29C 4776

Patent

active

056562217

ABSTRACT:
Process for direct production of shaped packaging material made of thermoplastic polyesters with no effect on the taste of foods packaged in them, where the diol component of the polyester consists of at least 70 wt % ethylene glycol, and the polyester is produced in the presence of the usual catalysts plus additional cobalt or cobalt and manganese compounds and phosphorus compounds. An inert gas is introduced into the polyester melt and distributed uniformly in the melt immediately after its discharge from the polycondensation reactor, 0.05 to 1.0 wt % of an amide compound with a low volatility is added to the polyester melt directly next to the gas inlet. Finally, the polyester melt is subjected to a vacuum degassing immediately before the shaping apparatus and the melt is sent directly to the shaping apparatus within a maximum of 30 minutes after its discharge from the reactor at a maximum temperature of 35.degree. C. above the crystallite melting point of the polyester.

REFERENCES:
patent: 2742451 (1956-04-01), Heisenberg et al.
patent: 2865892 (1958-12-01), Izard et al.
patent: 3480587 (1969-11-01), Porter
patent: 3486864 (1969-12-01), Van Der Schee et al.
patent: 3499873 (1970-03-01), Kuehne et al.
patent: 3499874 (1970-03-01), Takahashi et al.
patent: 3617225 (1971-11-01), Kuehne et al.
patent: 4020049 (1977-04-01), Rinehart
patent: 4072663 (1978-02-01), Pendlebury
patent: 4142040 (1979-02-01), Jabarin et al.
patent: 4230819 (1980-10-01), Hauenstein et al.
patent: 4238593 (1980-12-01), Duh
patent: 4263425 (1981-04-01), Rothe et al.
patent: 4837115 (1989-06-01), Igarashi et al.
patent: 5055273 (1991-10-01), Wilhelm et al.
patent: 5080845 (1992-01-01), Herrmann et al.
patent: 5258235 (1993-11-01), Mehta et al.
patent: 5266413 (1993-11-01), Mills et al.

Affiliated with

Also associated with

Rating

Process for direct production of low acetaldehyde packaging mate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for direct production of low acetaldehyde packaging mate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for direct production of low acetaldehyde packaging mate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-157809