Process for the production of biaxially stretched films and appa

Details Process for the production of biaxially stretched films and appa Process for the production of biaxially stretched films and appa

1996-03-08

1998-11-10

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264400, 264162, 2642102, 264216, 2642358, 264284, 2642902, 425 66, 425 71, 425224, 425385, B29C 4126

Patent

active

058339043

ABSTRACT:
In a for the production of biaxially stretched films, a take-off roll 4 is arranged downstream of a draw-off roll 3 . A plastic melt is formed into an initial film by means of a slot die 1, cooled on the draw-off roll 3 and passed over the take-off roll 4 which has a predetermined surface roughness. The film is then biaxially stretched and heat-set.

REFERENCES:
patent: 3491177 (1970-01-01), Johnson
patent: 4370291 (1983-01-01), Kazama et al.
patent: 4428724 (1984-01-01), Levy
patent: 4803027 (1989-02-01), Peiffer et al.
patent: 4911874 (1990-03-01), Peiffer et al.
patent: 4976908 (1990-12-01), Mizuno et al.
patent: 5100593 (1992-03-01), Mizuno et al.
patent: 5215804 (1993-06-01), Hagens et al.
patent: 5252389 (1993-10-01), Schmidt et al.

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