Process and device for producing extrudates from ultra-high mole

Details Process and device for producing extrudates from ultra-high mole Process and device for producing extrudates from ultra-high mole

1993-09-29

1995-09-12

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264143, 26433117, 264349, 425208, 4253791, 425380, 425464, B29C 4762

Patent

active

054494842

ABSTRACT:
For the production of extrudates such as profiles or granules, pulverulent or finely divided ultra-high molecular weight polyethylene is processed on single screw extruders. By the use of a screw with a specific geometry, thermal degradation of the polymer into low molecular weight products is avoided. Furthermore, profiles are obtained which have perfect surfaces, are free of voids and pores, and have no internal stresses.

REFERENCES:
patent: 3486192 (1969-12-01), Roy
patent: 3650652 (1972-03-01), Dray et al.
patent: 4733970 (1988-03-01), Yokana
patent: 4994223 (1991-02-01), Hestehave et al.
patent: 5063016 (1991-11-01), Bauer et al.
patent: 5234652 (1993-08-01), Woodhams et a.
patent: 5290498 (1994-03-01), Shiraki et al.

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