Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Patent
1987-05-22
1988-10-25
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
264171, 264216, 264237, 425 721, B29C 4788
Patent
active
047802642
ABSTRACT:
The draw resonance problems encountered when extrusion casting or extrusion coating linear low density polyethylene, LLDPE, are substantially alleviated by a polymer designed to have an I.sub.2 value in the range of about 0.1 to about 25, and an I.sub.10 /I.sub.2 ratio of not more than 8.3, preferably lower than 8.3. Line speeds approaching and even surpassing those attained with LDPE are made possible. This invention can even be used in conjunction with known prior methods for alleviating draw resonance problems with LLDPE and obtain the benefits of the combination. The I.sub.2 is measured in accordance with ASTM D-1238-190/2.16 and the I.sub.10 is measured in accordance with ASTM D-1238-190/10.
REFERENCES:
patent: 4076698 (1978-02-01), Anderson
patent: 4282177 (1981-08-01), Kurtz et al.
patent: 4302566 (1981-11-01), Karol et al.
patent: 4339507 (1982-07-01), Kurtz et al.
patent: 4348349 (1982-09-01), Kurtz
patent: 4360494 (1982-11-01), Kurtz
patent: 4486377 (1984-12-01), Lucchesi et al.
patent: 4608221 (1986-08-01), Kurtz et al.
patent: 4612300 (1986-09-01), Coleman, III
patent: 4668463 (1987-05-01), Cancio et al.
"Reducing Draw Resonance in LLDPE Film Resins" Lucchesi et al., Plastics Engineering, 5-1985.
"New Pocesses for the Reduction of Draw Resonance in Melt Embossing and Extrusion Coating,"Antec, 5-1985.
"Part 1. Newtonian Fluids", Alche, vol. 24, No. 3, Hyun, 5-1978.
Dohrer Kathryn K.
Niemann Debra H.
Lee Walter J.
The Dow Chemical Company
Thurlow Jeffery
LandOfFree
Linear low density polyethylene cast film does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Linear low density polyethylene cast film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linear low density polyethylene cast film will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2268163