Method for processing polyolefins at high shear rates

Details Method for processing polyolefins at high shear rates Method for processing polyolefins at high shear rates

1993-02-17

1994-06-14

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264171, 264174, 264169, 2641761, 264216, 26433117, 425113, 425461, B29C 4792

Patent

active

053207980

ABSTRACT:
Processing, particularly extruding polyolefins having low MI, narrow MWD at extrusion temperatures less than about 200.degree. C. and at shear rates less than about 2000 sec.sup.-1 but immediately above the shear rate corresponding to the end of the slipstick region of the polyolefin produces a new window of processing conditions to produce smooth polymers that do not have sharkskin melt fracture or wavy surfaces.

REFERENCES:
patent: 2991508 (1961-07-01), Fields
patent: 3382535 (1968-05-01), Ferrari
patent: 3920782 (1975-11-01), Cogswell
patent: 4623502 (1986-11-01), Cohen
patent: 4713205 (1987-12-01), Su
patent: 4859398 (1989-08-01), Su
patent: 4948543 (1990-08-01), Pawlowski et al.
Rauwendaal, C. "How Proper Die Design Can Improve Profile Quality" Plastics World, Nov. 1991, pp. 73-75.

Affiliated with

Also associated with

Rating

Method for processing polyolefins at high shear rates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for processing polyolefins at high shear rates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for processing polyolefins at high shear rates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1247225