Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1978-05-15
1980-05-27
Thurlow, Jeffrey R.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264 404, 264 407, 264141, 264176R, 264211, B29F 301, B29G 200
Patent
active
042050308
ABSTRACT:
A method for extrusion of a highly viscous thermosetting or a thermoplastic material comprising extrusion of said material in the presence of substances diminishing external friction of the melt, at a ratio between internal and external friction values of the material melt within the range of from 1.5 to 4.0; the thermosetting material melt viscosity being ranged from 50.times.10.sup.6 to 300.times.10.sup.6 poises, while the thermoplastic material melt index being varied from 0.01 to 0.1 g/10 min.
The ratio between internal and external friction values of the material melt is maintained within the above-specified range by way of incorporation, into the starting thermosetting or thermoplastic material, of certain compounds. For thermosetting materials, use is made of, e.g. zinc dialkyldithiophosphate, and for thermoplastic materials barium sulphonate is used as such a compound.
The extrusion method according to the present invention makes it possible to perform granulation of a thermosetting material so that the resulting granules are not subjected to a premature curing, agglomeration upon storage and can be processed into articles by any conventional method. In the extrusion-moulding of thermoplastic materials the final shaped articles do not substantially swell or change their shape. Furthermore, the method according to the present invention makes it possible to increase the product output due to an increase of the extrusion speed to 300 m/min.
REFERENCES:
patent: 2309342 (1943-01-01), Dent et al.
patent: 2857624 (1958-10-01), Hanzel et al.
patent: 3066356 (1962-12-01), Porter
patent: 3387073 (1968-06-01), Larsen
patent: 3492310 (1970-01-01), Carrow
patent: 3665068 (1972-05-01), Duling et al.
patent: 4056592 (1977-11-01), Izumi et al.
Abramov Vsevolod V.
Akutin Modest S.
Iovdalsky Nikolai V.
Melekhova Galina D.
Menshutin Vasily P.
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