Production of polyethylene materials having improved strength an

Details Production of polyethylene materials having improved strength an Production of polyethylene materials having improved strength an

1989-07-03

1991-02-26

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

With step of cooling to a temperature of zero degrees c. or...

5263481, 526352, 526 66, 526124, 526125, 264120, 264122, 264126, 264171, 264205, 2642102, 2642106, 2642108, 264211, 264236, 264300, 264320, 26433117, 525240, B29C 3502

Patent

active

049960113

ABSTRACT:
A process for producing polyethylene materials in which ultrahigh molecular polyethylene is molded by compression, extrusion or rolling and stretching in a solid phase and at specified temperatures. The polymer is formed by a selected multi-stage polymerization with the use of a composite catalyst of specified compositions. Fibers or films are obtained with improved strength and modulus qualities.

REFERENCES:
patent: 3944536 (1976-03-01), Lupton
patent: 4518552 (1985-05-01), Matsuo et al.
patent: 4769433 (1988-09-01), Chanzy
patent: 4820466 (1989-04-01), Zachariades
patent: 4824619 (1989-04-01), Okada et al.
patent: 4879076 (1989-11-01), Sano et al.
T. Kanamoto et al., Preprints of the Society of High Polymers, Japan, vol 34, p. 873 (1985).

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