Sheath core composite extrusion and a method of making it by mel

Details Sheath core composite extrusion and a method of making it by mel Sheath core composite extrusion and a method of making it by mel

1985-10-11

1987-07-14

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

2642096, 2642105, 26421117, 26421124, 264327, B29C 4786

Patent

active

046801561

ABSTRACT:
A composite extrusion, such as a fiber, film or ribbon, having an inner core and an outer sheath, wherein the inner core is made of a molecularly oriented polymer capable of being rigidified by imposition of a temperature gradient and the sheath is made of a polymer wherein its molecules are generally not oriented. A method of making such a composite extrusion utilizing melt transformation coextrusion wherein the inner core-forming material is caused to assume a molecular orientation coaxial to the longitudinal axis of said core while in a molten state and then forced through a reducing die while being subjected to a temperature gradient while surrounded by the liquid sheath-forming material such that crystallization in at least the outer skin of said core occurs within the die but the sheath-forming material does not crystallize until the extrudate exits the die.

REFERENCES:
patent: 2063180 (1936-12-01), Meyer et al.
patent: 2433711 (1948-06-01), Sisson
patent: 2439813 (1948-04-01), Kulp et al.
patent: 2439815 (1948-04-01), Sisson
patent: 2932079 (1960-04-01), Dietzsch
patent: 2989798 (1961-06-01), Bannerman
patent: 3244785 (1966-04-01), Hollandsworth et al.
patent: 3322870 (1967-05-01), Sacks
patent: 3382220 (1968-05-01), Bowman, Jr.
patent: 3458615 (1969-07-01), Bragaw, Jr. et al.
patent: 3541198 (1970-11-01), Ueda et al.
patent: 3579414 (1971-05-01), Ueda et al.
patent: 3593513 (1971-07-01), Reese
patent: 3616183 (1971-10-01), Brayford et al.
patent: 3658634 (1972-04-01), Yanagi et al.
patent: 3671620 (1972-06-01), Inoue
patent: 3679541 (1972-07-01), Davis et al.
patent: 3725192 (1973-04-01), Ando et al.
patent: 3760046 (1973-09-01), Schwartz et al.
patent: 3886015 (1975-05-01), Turner
patent: 3949042 (1976-04-01), Utz
patent: 4053270 (1977-10-01), Collier
patent: 4056344 (1977-11-01), Lemelson
patent: 4059949 (1977-11-01), Lee
patent: 4075378 (1978-02-01), Anton et al.
patent: 4309476 (1978-02-01), Nakamura et al.
patent: 4348346 (1982-09-01), Thompson
patent: 4379117 (1983-04-01), Baird, Jr. et al.
patent: 4390581 (1983-06-01), Cogswell et al.
patent: 4451306 (1984-05-01), Verne
patent: 4485062 (1984-11-01), Dawes et al.

Affiliated with

Also associated with

Rating

Sheath core composite extrusion and a method of making it by mel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sheath core composite extrusion and a method of making it by mel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sheath core composite extrusion and a method of making it by mel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1426898