Solution casting method and polymer film

Details Solution casting method and polymer film Solution casting method and polymer film

2005-03-29

2009-06-02

Huson, Monica A (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

By casting liquids on a solid supporting or shaping surface

C264S216000, C264S571000

Reexamination Certificate

active

07540986

ABSTRACT:
Side edge portions of a film in which a content of a remaining solvent is at least 30 wt. % are contacted to side parts of first-third rollers with suctioning through suction ducts. Thus a middle portion between the side edge portions is not contacted to the rollers, and the film is transported toward a tenter device in accordance with the rotation of the rollers. In the rollers, each side part of the rollers has a larger diameter of a middle part. At least one of intervals between the neighboring rollers is from 1 mm to 200 mm, and the lapping angle is from 1° to 180°. Toward the middle part of the film, and air is fed in a roller side. The obtained film doesn't have any neither crumples, wrinkle, curl and the like, and foreign materials are hardly adhered. Therefore the continuous film production can be made stably.

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