Process for reducing draw resonance by heating film after extrus

Details Process for reducing draw resonance by heating film after extrus Process for reducing draw resonance by heating film after extrus

1987-12-30

1989-08-22

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264556, 264216, 264235, 264346, 4251744, 425224, B29C 4788

Patent

active

048593796

ABSTRACT:
Films such as LLDPE extruded through a slot-die and drawn under high Deborah number conditions behave like elastic solids and exhibit draw resonance which is alleviated by heating the film after it exits the extruder, e.g., with radiant heaters.

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patent: 4332543 (1982-06-01), Fulton et al.
patent: 4486377 (1984-12-01), Lucchesi et al.
patent: 4608221 (1986-08-01), Kurtz et al.
patent: 4668463 (1987-05-01), Cancio et al.

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