Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1985-09-25
1987-12-15
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
264564, 26417715, 2642091, 2642098, 26421121, 4253261, 425461, B29C 4712, B29C 4720
Patent
active
047132051
ABSTRACT:
A die geometry which reduces the incidence or degree of melt fracture in the extrusion of linear polyethylene homopolymers and/or copolymers is described.
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J. A. Brydson, Flow Properties of Polymer Melts, pp. 79-83, Van Nostrand-Reinhold, (1970).
Tordella, "Capillary Flow of Molten Polyethylene--A Photographic Study of Melt Fracture", Transaction of the Society of Rheology, vol. 1, 203-212, (1957); and Vlachopoulos et al., A Comparison of Melt Fracture Initiation Conditions in Capillaries and Slits, Journal of Applied Polymer Science, vol. 21, 1177-1187, (1977).
Gilman Michael G.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Thurlow Jeffery
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