Plastic and nonmetallic article shaping or treating: processes – Disparate treatment of article subsequent to working,... – Effecting temperature change
Patent
1991-11-26
1993-11-23
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Disparate treatment of article subsequent to working,...
Effecting temperature change
264233, 2642358, 2642893, 2642902, 264346, 528222, 528226, B29C 5512
Patent
active
052641767
ABSTRACT:
An aromatic sulfide/ketone polymer is prepared from a dihaloaromatic ketone, alkali metal sulfide, water and a polar organic compound. The polymerization reaction mixture is subjected to a heat soak at an elevated temperature, then a separation agent is added under controlled conditions and the mixture is subsequently cooled to provide a mixture comprising particulate aromatic sulfide/ketone polymer. Biaxially-oriented film is made from the recovered particles of aromatic sulfide/ketone polymer by (1) washing the polymer particles with an aqueous calcium salt, (2) heating the washed particles to remove water, (3) molding the heated particles to form a sheet of polymer, (4) biaxially stretching the sheet above the glass transition temperature of the polymer to form a film, and (5) heat-setting the biaxially-oriented film under stretching tension for a time and at a temperature to increase strength properties and density.
REFERENCES:
patent: 4777228 (1988-10-01), Mizuno et al.
patent: 4810566 (1989-03-01), Kawakami et al.
patent: 4897238 (1990-01-01), Kouyama et al.
patent: 4980114 (1990-12-01), Satake et al.
patent: 5003033 (1991-03-01), Geibel et al.
patent: 5045628 (1991-09-01), Nesheiwat
patent: 5071944 (1991-12-01), Cliffton et al.
patent: 5085819 (1992-02-01), Satake et al.
Bobsein Rex L.
Cliffton Michael D.
Geibel Jon F.
Reed Jerry O.
Dollar Beverly M.
Phillips Petroleum Company
Thurlow Jeffery
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