Blown film extrusion

Details Blown film extrusion Blown film extrusion

1985-09-23

1986-12-30

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264569, 264237, 264348, 425 72R, 4253261, 425388, B29C 4788

Patent

active

046328017

ABSTRACT:
A method of blown film extrusion of polyolefins having high elongational viscosity which is independent of applied stress, and high melt strength wherein a first air ring is disposed adjacent an extrusion die to assist in the formation and stability of a stalk bubble configuration, and a second air ring is disposed downstream of the first air ring to assist in controlled expansion of the bubble at a point where the bubble has dissipated its melt elasticity.

REFERENCES:
patent: 3243486 (1966-03-01), Pilaro
patent: 3265789 (1966-08-01), Hofer
patent: 3307218 (1967-03-01), Reifenhauser
patent: 3507006 (1970-04-01), Princen
patent: 3568252 (1971-03-01), Masuda et al.
patent: 4259047 (1981-03-01), Cole
patent: 4330501 (1982-05-01), Jones et al.
patent: 4373273 (1983-02-01), Church
patent: 4447387 (1984-05-01), Blakeslee et al.
patent: 4472343 (1984-09-01), Kawamura et al.
patent: 4479766 (1984-10-01), Planeta
patent: 4505657 (1985-03-01), Ikeya

Affiliated with

Also associated with

Rating

Blown film 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 Blown film extrusion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blown film extrusion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1546399