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Patent Searching and Data


Title:
PRODUCTION METHOD OF RESIN FILM
Document Type and Number:
Japanese Patent JP2017001367
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a production method of a resin film capable of sufficiently suppressing whitening which may occur on a film during drawing.SOLUTION: A production method comprises: a supply step for supplying a long film 16; and a drawing step for transporting the film 16 by plural holding tools 24, 25 for holding both side end parts of the film 16 in a width direction, and drawing the film 16. A thickness d of each of held areas which are held by the holding tools 24, 25 of the film 16 is 0.012-0.045 mm. In the production method of the resin film, the film 16 is held by the holding tools 24, 25, so that a distance L between a tip end 16a of the film 16 in the width direction and a position 16b farthest from the tip end 16a in a portion sandwiched by the holding tools 24, 25 of the film 16 satisfies the following formula (1), the formula (1) is 2.5 mm≤L≤(1200×d-10.5)mm.SELECTED DRAWING: Figure 3

Inventors:
KUBO KIMITAKA
Application Number:
JP2015120989A
Publication Date:
January 05, 2017
Filing Date:
June 16, 2015
Export Citation:
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Assignee:
KONICA MINOLTA INC
International Classes:
B29C55/04; B29C41/24; B29C41/52
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Masashi Haruji