Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1989-10-06
1990-08-14
Lorin, Hubert C.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
2642101, 26421112, 2642106, D01F 604
Patent
active
049485458
ABSTRACT:
An orientated polyolefin composition comprising an olefin (co)polymer having a weight average molecular weight (Mw) from 30,000 to 1,000,000 and a high molecular weight tail extending to molelcular weights above 1,000,000, and has a microstructure which is substantially parallel chain extended cores of the component polymer(s) and associated lamellar overgrowths extending in planes normal to the cores in which the lamellar overgrowths on adjacent cores intermesh and are capable of sustaining a haul off tension of at least 10 MPa without breaking during its extrusion, is produced by extruding an olefin copolymer through a die under a pressure of about 5-10 MPa, at a temperature above the self-blocking temperature thereof and by hauling off the extrudate at a tension of at least 10 MPa without breaking. The extrudates so produced have a high modulus.
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patent: 4053270 (1977-10-01), Collier et al.
J. A. Juijin, "Polymer Materialen Met Een Zeer Hoge Modulus"; Plastica, vol. 31, No. 9, 9/78 Rotterdam, NL, pp. 262-270.
A. S. Abhiraman, "Shish-Kebab and High Performance Morphologies"; Journal of Applied Polymer Science, vol. 23, No. 8, 4/79, N.Y., pp. 2419-2424.
Odell et al., Polymer, 1978, vol. 19, Jun., pp. 617-626.
Collier et al., Polymer Eng. & Sci. 16(3), 1976, pp. 204-211.
Smith et al., J. Mat. Sci., 15, 1980, pp. 505-514.
Bashir Zahir
Keller Andrew
Odell Jeffrey A.
Lorin Hubert C.
Stamicarbon B.V.
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