Stretch method of polymer film and manufacturing method of polymer film

A technology of polymer film and polymer film, which is applied in the stretching of polymer film and the manufacture of polymer film, and can solve problems such as difficulty in elongation, film breakage, and poor deformation

Active Publication Date: 2014-11-26
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, as described in Japanese Patent Application Laid-Open No. 2008-238682, in the case where the bonding process is uniformly performed over the entire area of ​​the overlapped portion, it is difficult to compare the portion of the film that constitutes the overlapped portion with the portion that does not constitute the overlapped portion of the film. elongation
Therefore, when stretching is performed on the joined film, the film breaks due to the difference in the amount of deformation in the vicinity of the boundary between the two parts, and failures frequently occur.

Method used

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  • Stretch method of polymer film and manufacturing method of polymer film
  • Stretch method of polymer film and manufacturing method of polymer film
  • Stretch method of polymer film and manufacturing method of polymer film

Examples

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Embodiment Construction

[0038] Such as figure 1 As shown, the off-line stretching equipment 2 has a film storage chamber 4 , a reservoir 5 , a tenter unit 6 , a heat relaxation chamber 7 , a cooling chamber 8 , and a film winding chamber 9 in this order. The film storage chamber 4 accommodates the elongated film 3 . In the tenter unit 6 , stretching treatment is continuously performed on the film 3 .

[0039]The film storage chamber 4 includes a turret-type film delivery unit 10 and a joining unit 11 . The film delivery unit 10 has a turret arm 13 . A pair of mounting shafts (mounting shafts) 12 a are provided at both ends of the turntable arm 13 . The turret arm 13 is intermittently rotated by 180 degrees so that one mounting shaft 12 a is set at the film delivery position 16 and the other mounting shaft 12 a is set at the core replacement position 17 . At the core replacement position 17 , the film roll 14 is attached to the attachment shaft 12 a, and the film roll 14 attached to the attachment...

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Abstract

An off-line stretching device is provided with an accepting chamber and a stretching frame. The accepting chamber accepts an advanced film roller and a subsequent film roller. The width of the advanced film roller is expanded while the stretching machine maintains the maintenance area of the advanced film roller sent out from the advanced film roller. After all advanced films are sent out, subsequent films are sent out to the stretching machine from the subsequent roller. In the jointing part installed in front of the stretching machine, the rear end of the advanced film is overlapped with the front end of the subsequent film so as to form an overlapped part. A deposition area is installed at the part of the overlapped part depart from the central part of the maintenance are in B direction. The jointing part is jointed and processed in the deposition area. After jointing and processing, the jointed film is sent to the stretching machine and stretched towards both sides in B direction at the state of maintaining the maintenance area.

Description

technical field [0001] The present invention relates to a method for stretching a polymer film (polymer web, polymer web) and a method for producing a polymer film. Background technique [0002] Polymer films (hereinafter referred to as films) have the characteristics of excellent light transmittance, flexibility, light weight and thin films. Therefore, the film is utilized in various ways as an optical film. Among them, the TAC film formed from cellulose acylate, especially cellulose triacetate (hereinafter referred to as TAC) with an average degree of acetylation of 57.5% to 62.5%, is used as a protective film for a polarizing plate of a liquid crystal display device, an optical compensation film, etc. Optical films such as thin films. As an optical compensation film, for example, there is a viewing angle expansion film. [0003] A solution film forming method is known as a main method for producing a thin film. In the solution film forming method, a polymer solution (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C55/08B29C65/02B29C65/08
CPCB29C55/02B29C65/02
Inventor 木下浩彰青岛伸介藤木弘荣
Owner FUJIFILM CORP
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