Method and device for manufacturing biaxial extending ribbon and device for bending ribbon

Abstract

The invention provides a biaxial extension strip-like article manufacturing method, manufacturing device and strip-like article retracting device. The inventive biaxial extension strip-like article manufacturing method is not needed to reset the controlling parameters and the like of a calendaring forming apparatus and a longitudinal extension apparatus and the like, even if the mode of enlarging the extension magnification of the transverse extension apparatus changes. In a first extension process of the manufacturing method, a first extension strip-like article is produced by extending the non extension strip-like article in its length direction. In a retracting process, an end or two ends at the width directional of the first extension strip-like article retracts one time or multiple times, to produce a first extension strip-like article with scheduled width, namely a first extension strip-like article with variable width. In a second extension process, part or whole of the retracting part of the first extension strip-like article with variable width is held, the first extension strip-like article with variable width is made to extend in the width direction for producing a second extension strip-like article.

Description

technical field

[0001] The invention relates to a manufacturing method of a biaxially stretched strip, a strip turning device and a biaxially stretched strip manufacturing device. Background technique

[0002] Conventionally, there are known a first stretching device (such as a roller stretching device) that stretches an unstretched strip in the longitudinal direction, and a strip that is stretched in the longitudinal direction by the first stretching device (hereinafter referred to as "the second stretching device"). A stretching belt") is a biaxial stretching device (for example, refer to Patent Document 1) composed of a second stretching device (such as a tenter device, etc.) extending in the width direction.

[0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 2002-67141

[0004] However, in general, in the second stretching device typified by a tenter or the like, there is a limit in the stretching width. Therefore, there are cases where the operato...

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