Process for laminar pollymer extrusion

Details Process for laminar pollymer extrusion Process for laminar pollymer extrusion

1990-10-16

1993-02-23

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Orienting or aligning solid particles in fluent matrix material

264171, 2641761, 2642106, 26433119, 425461, B29C 4706, B29C 4714

Patent

active

051887843

ABSTRACT:
In a laminar extrusion, overlapping layers of an EVOH phase are dispersed into a PP or MAPP matrix phase incompatible with the EVOH phase to form a vapor, gas and/or organic liquids barrier. When the matrix phase is a PP phase, MAPP can be added to improve adhesion between the overlapping layers and the matrix phase. MEPR and/or PE can also be mixed with the EVOH and/or PP phase to adjust the mechanical properties of the extrusion. In order to produce the extrusion, a molten polymer blend including bodies of the EVOH phase dispersed in the PP or MAPP phase is first prepared and then extruded through a die unit. In the die unit, a converging extensional flow is produced to lengthen the dispersed bodies of EVOH phase in a first direction while a diverging extensional flow lengthens these bodies in a second direction transversal to the first one. Such lengthening of the bodies produces in the extrusion the overlapping layers of EVOH phase.

REFERENCES:
patent: 3267518 (1966-08-01), Juel et al.
patent: 3720732 (1973-03-01), Sevenich
patent: 3873667 (1975-03-01), Preto et al.
patent: 4057610 (1977-11-01), Goettler et al.
patent: 4240782 (1980-12-01), McPhee et al.
patent: 4410482 (1983-10-01), Subramanian
patent: 4731216 (1988-03-01), Topolski
patent: 4828915 (1989-05-01), Schroeder et al.
Selar Barrier Resin brochure.
"A Processible Toughened PET for Cost Effective Hydrocarbon and Flavor Baer", Dr. Linda R. Bateman, Nov. 4, 1986.
"A New Challenger To Present Barrier Resins", Don James, Feb. 18, 1986.
Selar PT Barrier Resin Selector Guide.
Selar PT 4234 data sheet.
Selar Packaging Preview brochure.
Selar Packaging Preview brochure-Agricultural Chemicals Go To Market Safely In Containers Made With Selar RB.
Selar Packaging Preview brochure--Sewell High Barrier Containers ring Zep's Reach To The Marketplace.
Selar PA 3426 data sheet.
Selar OH Selector Guide.
Hold Hydrocarbons In, Keep Packaging Costs Down brochure.
Selar OH 4416 data sheet.
Selar OH 3007 data sheet.
Selar OH 3003 product information sheet.
Selar PT-A Unique Barrier Film For Flexible Packaging, Diane L. McCauley, Sep. 1987.
Multiple Layers For Multiple Markets, Alvin S. Topolski, Oct. 6, 1987.
Selar PT 4368 data sheet.

Affiliated with

Also associated with

Rating

Process for laminar pollymer extrusion does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for laminar pollymer extrusion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for laminar pollymer extrusion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2202813