Process for producing products of cross-linked thermoplastic mat

Details Process for producing products of cross-linked thermoplastic mat Process for producing products of cross-linked thermoplastic mat

1977-03-21

1978-11-21

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264236, 264261, 264308, 264329, B28B 320

Patent

active

041266617

ABSTRACT:
The process is of the type comprising continuously shaping a mixture of thermoplastic material and crosslinking agent by pressure and then effecting the cross-linking by the cross-linking agent. The cross-linkable mixture is placed inside a sintering zone in which it is subjected to the action of pressure and a sintering temperature at the same time as it is put into shape. It is then conveyed without modification of shape by means of the same pressure to a zone where the cross-linking is effected by a rise in temperature. The device comprises in the following order, along a common axis, a device supplying the cross-linkable mixture, a sintering die and a cross-linking die. These dies define a continuous space in which the pressure is exerted and each comprise heating means.

REFERENCES:
patent: 3374304 (1968-03-01), Ayres et al.
patent: 3461490 (1969-08-01), Cottingham
patent: 3546326 (1970-12-01), Seifert et al.
patent: 3868436 (1975-02-01), Ootsuji et al.
patent: 3876736 (1975-04-01), Takiura
patent: 3928525 (1975-12-01), Iuwa et al.
patent: 3979488 (1976-09-01), Greenhalgh et al.
patent: 4001368 (1977-01-01), Michigoe et al.
patent: 4049757 (1977-09-01), Kammel et al.

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