Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1991-06-14
1993-04-20
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
26433117, 264DIG65, B29C 4782
Patent
active
052040453
ABSTRACT:
A solid state extrusion process extrudes a semi-crystalling polymer billet through a die at the end of a pressure chamber. The temperature of the die is controlled so that a thin surface layer of the polymer profile being extruded is melted to form a thin, smooth surface layer on the profile of reduced orientation and increased toughness and which is substantially free of surface imperfections.
REFERENCES:
patent: 3443007 (1969-05-01), Hardy
patent: 4225547 (1980-09-01), Okita
patent: 4266919 (1981-05-01), Dunnington et al.
patent: 4303609 (1981-12-01), Hureau et al.
patent: 4552712 (1981-11-01), Ramamurthy
patent: 4554120 (1985-11-01), Ramamurthy
patent: 4587163 (1986-05-01), Zachariades
patent: 4680156 (1987-07-01), Collier
patent: 4731199 (1988-03-01), Matsuo et al.
patent: 4820466 (1989-04-01), Zachariades
patent: 4830595 (1989-05-01), Bentivoglio et al.
patent: 4938913 (1990-07-01), Ward et al.
Chung et al., American Chemical Society, Pre-prints vol. 39, for National Meeting of American Chemical Society, 176th, pp. 74-80, Miami Beach (Sep. 1978).
Bigg, Polymer Engineering and Science, vol. 28, pp. 830-841 (1988).
Allen Steven G.
Courval Gregory J.
Thomas Dermot R. M.
Symplastics Limited
Tentoni Leo B.
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