Ube Industries, Inc.

Takeru Fujinaga

Hiroyuki Ikeuchi

Yasuhiro Nagoshi

Toshihiko Anno

Masakatsu Kimura

Toshihito Sakai

Yujiro Noda

In manufacture of a polyimide film, self-supporting film is heated with both ends in a width direction held and carried by the tenter apparatus. The tenter apparatus has a guide member placed on each side of a carry path for the self-supporting film and a pair of tenter chains each moved along the guide member and each including a film holding mechanism for holding an edge portion of the self-supporting film. The tenter chain has a rotating body supported rotatably around a shaft member extending in a direction in parallel with a carry face of the self-supporting film and perpendicular to a longitudinal direction of the guide member for movably supporting the tenter chain. The shaft member is directly or indirectly fixed to a member identical to a member to which the film holding mechanism is fixed.

Method of manufacturing polyimide film and tenter apparatus

A stretching apparatus capable of optimally inhibiting neck-in of a film when the film is stretched in an MD (Machine Direction), has an advancing mechanism, a take-in mechanism, and film-holding unit placed at both end portions in a TD (Transverse Direction) of a transfer path of film between the mechanisms. The film-holding unit has a plurality of upper holding rollers placed in parallel at intervals in the MD of the film above the transfer path of film, and a plurality of lower holding rollers placed opposite to upper holding rollers below the transfer path of film such that the plurality of lower holding rollers work together with the plurality of upper holding rollers to sandwich the film vertically between the rollers. Upper holding rollers and lower holding rollers are rotatably supported such that their rotational axes are inclined outward in the TD of film toward a downstream side of the MD of film.

Stretching apparatus and method of manufacturing polyimide film using the same

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Ube, Japan

Takeru Fujinaga