Method of manufacturing products of cross-linked thermoplastic m

Details Method of manufacturing products of cross-linked thermoplastic m Method of manufacturing products of cross-linked thermoplastic m

1978-02-15

1980-06-24

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264209, 264236, 2642102, 264347, 425 71, B29F 308

Patent

active

042094844

ABSTRACT:
The process comprises forming a mixture containing a thermoplastic material and a cross-linking agent and causing the mixture to enter a die head. A pressure is exerted on the mixture in the die head along the axis of the die head so as to sinter the mixture. The die head is heated to a temperature lower than the temperature at which the cross-linking agent becomes substantially decomposed so as to cause fusion of the mixture and produce a formed material. The formed material is passed through a bath of molten salt downstream of the die head. The temperature of the molten salt is such as to achieve the decomposition of the cross-linking agent and the cross-linking of the formed material. A device is described for carrying out the process.

REFERENCES:
patent: 2971221 (1961-02-01), Schoenbeck
patent: 3024492 (1962-03-01), Antolino
patent: 3051992 (1962-09-01), Bradley
patent: 3054142 (1962-09-01), Hinderer et al.
patent: 3186032 (1965-06-01), Harwood
patent: 3201503 (1965-08-01), Benning et al.
patent: 3296661 (1967-01-01), De Moustier
patent: 3456294 (1969-07-01), Hood et al.
patent: 3591674 (1971-07-01), Engel
patent: 3699197 (1972-10-01), Egger

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